Mixtures are made up of what substances.
Answers
Answer:
Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.
Answer:
It would depend on the mixture to determine what the mixture is.
Explanation:
If you don't know what the mixture is then you wont be able to find what substances, since their could be many components.
Related Questions
Would love some help pleaseee. and please at least read the question instead of skipping it please.
Measuring tools can have errors. Errors lead to ___________________ results and _______________ conclusions. To calculate the difference of the accepted value and the experimental value, scientists use this formula:
percent error = (experimental value − ) × 100. accepted value
Minimizing Bias
People show bias when they want everyone to accept their results. Bias can arise for many reasons:
• Companies show bias when they depict only the research details that are in the best interest of their ____________.
• Scientists may be biased toward their _____________ and modify results suit their needs.
• Scientists may also show to bias get their research published in ______________ ______________.
Such biases often lead to _______________ facts. An important part of scientific thinking is identifying biases and taking the necessary steps to minimize them.
For results to be considered scientifically accurate, any scientist, regardless of his or her own bias, should be able to replicate the experiment and get the same results.
Summary
Think of some studies you’ve heard about. How can you tell whether the studies were well-designed and scientifically accurate or had biases?
Answers
Answer: this looks like your homework
Explanation:if you want help you are going to have to ask a specific question instead of giving people your homework.
Answer:
Honestly I would search this up maybe there might be a pdf with the answers. Sorry chemistry isn't my thing:(
Explanation:
"NH₄NO₃(s)→N₂O(g)+2H₂O(l) 45.7 g of ammonium nitrate is decomposed. Find the amount of each of the products formed in moles."
Answers
0.579 moles of N₂O gas and 1.158 moles of H₂O liquid are formed.
To find the amount of each product formed in moles, we need to use the stoichiometry of the balanced chemical equation.
The balanced equation is: NH₄NO₃(s) → N₂O(g) + 2H₂O(l)
Given:
Mass of ammonium nitrate (NH₄NO₃) decomposed = 45.7 g
First, we calculate the number of moles of NH₄NO₃ using its molar mass:
Molar mass of NH₄NO₃ = 80.0434 g/mol
Number of moles of NH₄NO₃ = mass / molar mass
= 45.7 g / 80.0434 g/mol
= 0.5701 mol
From the balanced equation, we can see that 1 mole of NH₄NO₃ produces 1 mole of N₂O and 2 moles of H₂O. Therefore:
Number of moles of N₂O = 0.5701 mol
Number of moles of H₂O = 2 * 0.5701 mol = 1.1402 mol
Rounding to three decimal places, the amount of each product formed in moles is approximately 0.579 moles of N₂O gas and 1.158 moles of H₂O liquid.
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which molecule can diffuse from the digestive tract into
Answers
Glucose can diffuse from the digestive tract into the human bloodstream without first being digested.
Glucose is the most typical monosaccharide, or kind of carbohydrate. Most plants and algae use solar energy to synthesize glucose during photosynthesis from water and carbon dioxide. This glucose is then used to make cellulose, the most common carbohydrate in nature, in the cell walls of the plants and algae. The most important source of energy for all species' energy metabolism is glucose. For use in metabolism, glucose is stored as a polymer, mostly as starch and amylopectin in plants and glycogen in mammals. Animals' blood contains glucose as blood sugar.
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Use VSEPR theory to predict the bond angles in a molecule of methane (CH4), which is a covalently bonded molecule.
Answers
Answer:
109.5 Degrees
Explanation:
Because CH4 is sp4 hybridized (Carbon is bonded to the 4 Hydrogens), the geometry of the molecule must be tetrahedral. Tetrahedral moleculues have bond angles of 109.5 Degrees.
Which of the following atoms will have the
most similar properties to the atom shown
below
Answers
Answer:
Atom 1. The ratio of Atom 1 to the diagram one is 1/2. It is the most closely related. Feel free to mark brainliest!
Have a great day!
Describe what is happening in EACH equation
Answers
The equation depicts the process of photosynthesis, in which sunlight causes a reaction between carbon dioxide (CO2) and water (H2O) to create glucose (C6H12O6) and oxygen (O2).
What is combustion reaction?In the equation, methane (CH4) and oxygen (O2) are burned together to create carbon dioxide (CO2) and water (H2O). This is an illustration of a combustion reaction in operation.
What is neutralisation reaction?The equation depicts how sodium hydroxide (NaOH) and hydrochloric acid (HCl) react to form salt (NaCl) and water (H2O). An illustration of an acid-base neutralization reaction is this. In the equation, calcium carbonate (CaCO3) and hydrochloric acid (HCl) react to form calcium chloride (CaCl2), water, and carbon dioxide (CO2). An example of an acid-base reaction is this.
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Which of the following statements is FALSE for the chemical equation given below in which nitrogen gas reacts with hydrogen gas to form ammonia gas assuming the reaction goes to completion?
N2 + 3H, = 2NH,
(a). One mole of N, will produce three moles of H2.
(b). The reaction of three moles of hydrogen gas will produce 17 g of ammonia (c). One molecule of nitrogen requires six atoms of hydrogen for complete reaction. (d). The reaction of 14 g of nitrogen produces 17 g of ammonia.
Answers
Answer:
The statement that is false for the chemical equation N2 + 3H2 = 2NH3 is (a). One mole of N2 will produce three moles of H2. In this reaction, one mole of N2 reacts with three moles of H2 to produce 2 moles of NH3. Therefore, one mole of N2 will not produce three moles of H2.
A ring and a disk both at rest roll down a hill together. Which rolls slower?
- disk
- ring
- both roll at the same speed
- not enough information to answer the question
Answers
The ring rolls slower than the disk when both objects are at rest and roll down a hill together. Option B is correct.
When a ring and a disk roll down a hill together, the ring will roll slower than the disk. This is because the distribution of mass in a ring is different from that of a disk. In a ring, the mass is concentrated towards the outer circumference, while in a disk, the mass is evenly distributed throughout.
As the objects roll down the hill, they convert potential energy into kinetic energy. The rotational kinetic energy of a rolling object depends on its moment of inertia, which is influenced by the mass distribution. Since the mass is concentrated towards the outer circumference of the ring, it has a larger moment of inertia compared to the disk. This higher moment of inertia results in a slower rotation and, therefore, a slower rolling speed for the ring compared to the disk.
Hence, B. is the correct option.
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--The given question is incomplete, the complete question is
"A ring and a disk both at rest roll down a hill together. Which rolls slower? A) disk B) ring C) both roll at the same speed D) not enough information to answer the question."--
Can a tutor help me with this question?
Answers
Answer:
C
Explanation:
It was the first to show that the atom had no net charge.
what is the difference between a pure substance and a mixture? what is the difference between a pure substance and a mixture? a pure substance is a substance composed of two or more different types of atoms or molecules that can be combined in fixed proportions; a mixture is a substance composed of two or more different types of atoms or molecules that can be combined in variable proportions. a pure substance is a substance composed of two or more different types of atoms or molecules; a mixture is a substance of only one type of atom or molecule. a pure substance is composed of only one type of atom or molecule; a mixture is a substance composed of two or more different types of atoms or molecules. a pure substance is a substance composed of two or more different types of atoms or molecules that can be combined in variable proportions; a mixture is a substance composed of two or more different types of atoms or molecules that can be combined in fixed proportions.
Answers
Pure substances have a sharp melting point but mixtures melt over a range of temperatures. This difference is most easily seen when the temperature of a hot liquid is measured as it cools and freezes.
Atoms that are isotopes of each other have different numbers of
Answers
Explanation:
Atoms that are isotopes of each other have different numbers of mass number
Select the effect of the size of a sample on the melting point (mp) measurement. Select the effect of the rate of heating on the melting point measurement. Select the effect that the degree of chemical purity of a substance has on the melting point measurement.
Answers
The size of a sample can affect the melting point measurement by either increasing or decreasing the observed melting point.
A larger sample size can lead to a broader melting range due to uneven heating, while a smaller sample size can result in a higher melting point due to surface effects.
The rate of heating can also affect the melting point measurement. A slow heating rate can result in a lower melting point due to partial decomposition, while a rapid heating rate can lead to a higher melting point due to kinetic factors.
The degree of chemical purity of a substance can affect the melting point measurement by increasing the observed melting point and narrowing the melting range. Impurities can lower the melting point and broaden the melting range due to eutectic effects.
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The density of zinc is 7.13 g/mL. What would be the volume of a 300.0 g sample of this metal?
Answers
Answer:
The answer is 42.08 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
\(volume = \frac{mass}{density} \\\)
From the question
mass of metal = 300 g
density = 7.13 g/mL
We have
\(volume = \frac{300}{7.13} \\ = 42.07573632...\)
We have the final answer as
42.08 mLHope this helps you
What is the mass in grams of 6.44 x 1023 molecules of Mgo?
Answers
Why does the reactivity of metals increase from right to left on the periodic table?
Metals on the right have fewer protons, making it harder to attract electrons from other atoms.
Metals on the right have more protons, causing valence electrons to be held more strongly.
Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
Metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.
Why does the reactivity of metals increase from right to left on the periodic table?
Metals on the right have fewer protons, making it harder to attract electrons from other atoms.
Metals on the right have more protons, causing valence electrons to be held more strongly.
Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
Metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.
Which feature is unique to Group 18 nonmetals?
They have more exceptions to reactivity rules.
They are very nonreactive.
They are very reactive.
They follow a different pattern of reactivity.
Which of the following combination of elements is the most reactive?
Na and Br
Cs and Br
Cs and I
K and I
How does Rb bond with other elements?
Rb loses two electrons.
Rb gains two electrons.
Rb loses an electron.
Rb gains an electron.
Answers
The characteristics of the reactivity of the periodic table allows to find the correct answers to the different questions are:
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
1) The reactivity of a chemical element is the tendency to combine with others, this increases as it has fewer electrons in its last layer and since they are more weakly bonded.
Consequently, halogens have seven electrons in their last shell tends to attract an electron to remain with the full level and the alkaline that an electron has in the last shell tends to lose the electron to remain with a complete shell.
If we examine the periodic table the number of electrons in the last shell decreases from right to left.
Let's review the different claims:
a) False. The elements on the right side have a higher atomic number, therefore more protons.
b) True. The elements have more protons therefore it has to attract other electrons and the reactivity decreases.
c) False. As it has more electrons, it has more energy levels, losing all the electrooens is more difficult, so the reactivity decreases.
d) False. By having more electrons it has more energy levels.
2) What is the unique characteristic of the elements of group 18
The elements of group 18 are the noble gases, they have their last full layer therefore they do not have.
the correct answer is: They are very nonreactive.
3) The reactivity in the period table decreases with increasing period therefore the element of period 3 is the most reactive in this case Sodium and Halogen of group 5 is the most reactive in this case Bromine.
the compound Na and Br is the most reactive of all.
4) Rubidium has 1 electron in its last shell, both in a chemical reaction pole loses the electron.
the correct answer is: Rb loses an electron
In conclusion, using the characteristics of the reactivity of the periodic table, we can answer the different questions..
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
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The whole Patterns of Reactivity Quick Check for Honors Chemistry is
1) B. Metals on the right have more protons, causing valence electrons to be held more strongly.
2) B. by gaining electrons
3) B. They are very nonreactive
4) A. Cs and Br
5) A. Rb loses an electron
In a titration how much 0.50 M HCl is needed to neutralize 1 liter of a 0.75 M solution of NaOH?
1.5 L
2.25 L
1.0 L
0.75 L
Answers
Answer:
1.5 L
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
HCl + NaOH —> NaCl + H2O
From the balanced equation above, The mole ratio of the acid (nA) = 1
The mole ratio of the base (nB) = 1
Step 2:
Data obtained from the question. This includes the following:
Molarity of acid (Ma) = 0.5M
Volume of acid (Va) =..?
Volume of base (Vb) = 1L
Molarity of base (Mb) = 0.75M
Step 3:
Determination of the volume of the acid needed for the reaction.
Using the formula:
MaVa/MbVb = nA/nB
The volume of the acid needed for the reaction can be obtained as follow:
0.5 x Va / 0.75 x 1 = 1
Cross multiply
0.5 x Va = 0.75 x 1
Divide both side by 0.5
Va = 0.75 /0.5
Va = 1.5 L
Therefore, the volume of the acid, HCl needed for the reaction is 1.5L
Which of the following is the relationship of the equilibrium constant values of the two equations below?
Answers
The nature of the two reactions would determine the nature of the equilibrium constant.
Relationship between the equilibrium constant of equations?The equilibrium constant of a chemical reaction represents the ratio of the concentrations of products to reactants at equilibrium, and is a measure of the relative stabilities of the reactants and products. The value of the equilibrium constant is determined by the intrinsic properties of the substances involved in the reaction, and does not change with time or temperature.
The relationship between the equilibrium constant of different chemical reactions can be used to predict the direction of a reaction.
Your question is incomplete as the equations are missing. However, you should know that if the equations are such that they are the opposite of each other then the relationship between the equilibrium constant would be an inverse relation.
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FAST 30 POINTS ON BRAINLY!!!
Answers
What is the boiling point of a solution made using 739 g of sucrose, C12H22O11, in 0.300 kg of water, H2O?
Answers
The boiling point of the sucrose solution would be 3.68 °C compared to the boiling point of pure water.
The boiling point of a solution depends on the concentration of solute particles in the solution, which affects the colligative properties of the solution, such as boiling point elevation.
To calculate the boiling point elevation, we can use the following formula;
ΔTb = Kbm
where ΔTb is the boiling point elevation, Kb is the molal boiling point constant for water (which is a constant value), and bm is the molality of the solution, which is the amount of solute (in moles) per kilogram of solvent.
First, let's calculate the molality of the solution;
moles of sucrose = mass of sucrose / molar mass of sucrose
moles of sucrose = 739 g / 342.3 g/mol (molar mass of sucrose)
Next, let's convert the mass of water to kilograms:
mass of water = 0.300 kg
Now, we can calculate the molality of the solution;
bm = moles of sucrose / mass of water
Plugging in the values;
moles of sucrose = 739 g / 342.3 g/mol ≈ 2.158 mol
mass of water = 0.300 kg
bm = 2.158 mol / 0.300 kg ≈ 7.193 mol/kg
Next, we need to determine the molal boiling point constant (Kb) for water. The molal boiling point constant for water is approximately 0.512 °C kg/mol.
Finally, we can calculate the boiling point elevation;
ΔTb = Kb × bm
ΔTb = 0.512 °C kg/mol × 7.193 mol/kg
≈ 3.68 °C
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the data in the table show the amount of 500 g sample of sodium-24 over time. make a graph of the data (remember to label all axes and title the graph)
Answers
The amount of sodium-24 decreases to approximately 125 g.
What is sodium?Sodium is a chemical element with the symbol Na on the periodic table. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metal group of chemical elements.
The graph below shows the amount of 500 g sample of sodium-24 over time. The x-axis of the graph represents time (in hours), and the y-axis represents the amount of sodium-24 (in grams). The title of the graph is "Amount of sodium-24 in 500 g Sample Over Time".
The graph shows that the amount of sodium-24 in the sample decreases over time. After 24 hours, the amount of sodium-24 in the sample decreases to approximately 375 g. After 48 hours, the amount of sodium-24 decreases to approximately 250 g. After 72 hours, the amount of sodium-24 decreases to approximately 125 g.
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2. What is some ways composting can help make our food system more sustainable ?
Answers
Answer:
Organic waste in landfills generates, methane, a potent greenhouse gas. By composting wasted food and other organics, methane emissions are significantly reduced. Compost reduces and in some cases eliminates the need for chemical fertilizers. Compost promotes higher yields of agricultural crops.
Explanation:
ASAP, the diagram shows the electron arrangement…
Which element does not form an covalent bond
Answers
Answer:
A doesn’t form a covalent bond
Explanation:
There is a couple different ways to determine if a bond is ionic or covalent. By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.
When Sulphur dioxide reacts with water the product formed is
Sulphuric acid
Sulphurous acid
Carbonic acid
None of these
Answers
Answer:
2 .Sulphurous acid
Explanation:
Sulphur dioxide can dissolve in water to form Sulfurous acid(H2SO3). sulphurous acid is weackly dibasic acid. sulphur dioxide is a major component of acid rain since it mixes with vapour in the atmosphere reacting to produce H2So4 .
Answer:
Sulphuric acid
Explanation:
Sulphuric acid is a major component of acid rain since it mixes with water vapour in the atmosphere, reacting to produce Sulphuric acid.
Hope that helped...
Which of these ions is more abundant in the interior of resting neuron that in the fluid surrounding the neuron?
A. Cl-
B. Ca++
C. Na+
D. K+
Answers
K+ ions are more abundant in the interior of resting neuron that in the fluid surrounding the neuron.
An active pump can keep the larger concentration of Na+ outside the neuron because there is resistance to the passage of Na+ through the neuronal membrane. At rest, K+ concentrations are higher inside the neuron.
Which ions are more abundant outside of a resting cell?
The sodium ion concentration inside the cell is low, whereas the sodium ion concentration outside the cell is higher.
What ion contributes the most to the resting potential of neurons?
Potassium is the main ion responsible for determining the resting membrane potential. In skeletal muscle, potassium conductance makes up around 20% of the resting membrane conductance, and it makes up the majority of the resting conductance in neurons and nerve fibers.
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How many atoms are in 0.075 mol of titanium?
O 4.5 x 1022
O 1.2 x 10-25
O 6.4 x 102
O 2.2 x 1024
Answers
Answer:
The answer is
4.5 × 10²²Explanation:
To find the number of atoms of titanium , given it's number of moles we use the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
n = 0.075 mol
We have
N = 0.075 × 6.02 × 10²³
We have the final answer as
4.5 × 10²²Hope this helps you
What is the density of a 6 g of pure copper with a volume of 12 mL?
a 0.25 g/mL
b 1.5 g/mL
c 2.3 g/mL
d 0.5 g/mL
Answers
Answer:
The density of copper is 0.5 g/mL
Explanation:
Given data:
Mass of copper = 6 g
Volume of copper = 12 mL
Density of copper = ?
Solution:
Formula:
d = m/v
d = density
m = mass
v = volume
d = 6 g/ 12 mL
d = 0.5 g/mL
Thus, the density of copper is 0.5 g/mL
a 110.-g sample of copper (specific heat capacity 5 0.20 j/8c ? g) is heated to 82.48c and then placed in a container of water at 22.38c. the final temperature of the water and copper is 24.98c. what is the mass of the water in the container, assuming that all the heat lost by the copper is gained by the wate
Answers
The mass of water is 231.71kg
What is specific heat capacity?The specific heat capacity of a substance is the quantity of heat required to increase the temperature of a unit mass of substance by 1°C or 1k. It is measured in J/kg/K. It is denoted by c.
The quantity of heat required is expressed as H= mc∆k. where m is the mass and k is temperature.
From the law of calorimetry, heat lost = heat gained. The specific heat capacity of water and copper are 400J/kg/k and 4200J/kg/k
heat lost by copper = 110×400× ( 82.48-24.98)
= 44000× 57.5 = 2530000J
heat gained by water = m× 4200 × (24.98-22.38)
= 4200× 2.6×M = 10920m
therefore 2530000= 10920m
where m is the mass of water
m= 2530000/10920
m= 231.71kg
therefore the mass of the water is 231.71kg
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suppose you have two samples that are equal in weight, 22.3 g zn and 22.3 g cr2o3 . calculate the number of moles of each substance.
Answers
The Number of Moles of Zn is 0.34108 and the number of moles of Cr2O3 is 0.14671.
What is Number of Moles?
The ratio of a substance's given mass in a chemical reaction to the mass of one mole of that material is what determines how many moles there are of that substance. A mole of any substance is equal to 6.0231023, or Avogadro's number. The ratio of a substance's given mass in any kind of chemical reaction to the mass of one mole of that material is the number of moles of that substance.
Moles of Zn can be calculated by using the formula
22.3 g of Zn x 1 mole Zn/65.4 g = 0.341 moles of Zn.
Moles of Cr2O3 can be calculated by using the formula
22.3 g of Cr2O3 x 1 mole Cr2O3/151.99 = 0.146 moles of Cr2O3.
Hence, 0.34108 and 0.14671 will be the number of moles for Zn adn Cr2O3 respectively.
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Zn has a mole count of 0.34108, while Cr2O3 has a mole count of 0.14671.
What is Number of Moles?
The number of moles of a substance is determined by the ratio of its given mass in a chemical reaction towards the mass of one mole of that substance. A mole, or 6.0231023, is equal to one mole of any substance. The number of moles of a substance is defined as the mass of one mole divided by the given mass of the substance in any type of chemical reaction.
The formula can be used to determine moles of zinc.
22.3 g of Zn x 1 mole Zn/65.4 g = 0.341 moles of Zn.
The formula can be used to determine moles of Cr2O3.
22.3 g of Cr2O3 x 1 mole Cr2O3/151.99 = 0.146 moles of Cr2O3.
Therefore, the moles of Zn and Cr2O3 will be 0.34108 and 0.14671, respectively.
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1-If the reaction between hydrogen and iodide absorbs
7. 93x10 J of heat , how many moles of iodine were consumed ? H₂ ( g
) + 1₂ ( s ) → 2 HI ( g ) AH = 53. 0 kJ
2- How many grams of oxygen gas a
Answers
Approximately 0.15 moles of iodine were consumed in the reaction. Use the stoichiometry of the balanced equation to find the moles of iodine.
To find the moles of iodine consumed in the reaction, we can use the given heat absorbed and the heat of the reaction (AH). The heat absorbed is given as 7.93x10 J, which we need to convert to kilojoules (kJ) by dividing it by 1000.
7.93x10 J ÷ 1000 = 7.93x10 kJ
Now, we can use the stoichiometry of the balanced equation to relate the heat of the reaction (53.0 kJ) to the moles of iodine consumed. According to the balanced equation:
H₂ (g) + I₂ (s) → 2 HI (g)
The stoichiometric coefficient in front of I₂ is 1, which means that 1 mole of iodine is consumed in the reaction.
Using the ratio of heat of reaction to moles of iodine, we can set up a proportion:
53.0 kJ ÷ 1 mole of iodine = 7.93x10 kJ ÷ x moles of iodine
Cross-multiplying and solving for x, we get:
x = (7.93x10 kJ)(1 mole of iodine) ÷ 53.0 kJ
x ≈ 0.15 moles of iodine
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An ecologist is studying ecosystems in the rainforest biome. Which of the following is an
abiotic observation he would record?
Answers
Answer: any non-living thing
Explanation: abiotic means non-living
The Abiotic observation that the ecologist would record are ;
Soil type, Climate Precipitation and SunlightAbiotic factors in ecosystem are the non-living factors that play an essential role in determining how an ecosystem is different from other ecosystems. Some of the Abiotic factors that will distinguish ecosystems in the rainforest biome include ;
The temperature of the rainforestThe Soil type Climate conditions Precipitation and Amount of sunlight .Hence we can conclude that The Abiotic factors/observation that the ecologist would record are ; Soil type, Climate , Precipitation and Sunlight
The options to your question are missing hence a general answer is provided above
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