Answer:
ok
Explanation:
GIVING BRAINLIEST
What do the arrows at point 3 indicate?
O Cool air is above water.
O Warm air is above land.
O Warm air is cooling quickly.
O Cool air is warming quickly.
Answer:
D) Cool air is warming quickly.
Explanation:
d is the answer.
The arrows at point 3 indicates that Warm air is cooling quickly and the correct option is option C.
What is Sea Breeze?Sea breeze is a blowing breeze from sea towards land during the day is called sea breeze.
During the day, the land surface heats up faster than the water surface.
Therefore, the air above the land is warmer than the air above the ocean.
As a result, warm air rises. Therefore, the warmer air over the land surface is rising.
As the warm air over the land is rising, the cooler air over the ocean is flowing over the land surface to replace the rising warm air
Therefore, The arrows at point 3 indicates that Warm air is cooling quickly and the correct option is option C.
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write an equation for the dissolution of hcl, nh4oh, and c2h5oh in water.
Which has particle moves at a greater speed: O2 with a mass of 32 amu at 15 degrees or Ar with a mass of 39.95 amu at 15 degrees?
The gas that has particles that move at a greater speed is O₂ with a mass of 32 amu at 15 degrees.
What is the relationship between the molar mass of a gas and the speed of the particles of the gas?The molar mass of gas and the speed of the particles of the gas are inversely proportional. This means that the higher the molar mass of a gas, the lower will be the speed of the particles of the gas
This is in accordance with Graham's law of diffusion which states that the rate of diffusion of a gas is inversely proportional to the square of the density of the gas.
Also, an increase in the temperature of a gas will result in an increase in the speed of the particles of the gas.
However, for two gases at the same temperature, the molar mass of the gases will determine the speed of the particles of the gas.
The heavier gas will have particles that move at a lower speed.
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A severe systemic reaction to an allergen causing serious symptoms that develop very quickly is known as.
Answer: Anaphylaxis
Explanation:
I have a nut allergy, and this has happened to me once. The doctors also told me a lot about anaphylaxis, and I like to learn about myself.
I hope this helps!! :)
Balance the following chemical equation (if necessary): Ca(CâHâOâ)â(aq) + NaâCOâ(aq) â CaCOâ(s) + NaCâHâOâ(aq)
Balance the chemical equation, which involves the terms "balance" and "equation". Here's the balanced equation for the reaction: Ca(C₂H₃O₂)₂(aq) + Na₂CO₃(aq) → CaCO₃(s) + 2 NaC₂H₃O₂(aq)
In this equation, calcium acetate (Ca(C₂H₃O₂)₂) reacts with sodium carbonate (Na₂CO₃) to form calcium carbonate (CaCO₃) and sodium acetate (NaC₂H₃O₂). To achieve balance, coefficients are added before the chemical formulas to ensure that the number of atoms of each element is equal on both sides of the equation. In this case, the balanced equation has a coefficient of 2 in front of sodium acetate (NaC₂H₃O₂) on the product side. This ensures that the number of atoms of each element is conserved throughout the reaction, adhering to the principle of mass conservation in chemical reactions.
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How many of the following are WEAK acids?
HNO2 HF HNO3 H2PO4^-
a. 0
b. 1
c. 4
d. 2
e. 3
The weak acids are HNO₂ and HF. Option D is correct.
HNO₂ (nitrous acid) and HF (hydrofluoric acid) are considered weak acids because they only partially dissociate in water, resulting in a relatively low concentration of H⁺ ions in solution. On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are strong acids, which fully dissociate in water, producing a high concentration of H⁺ ions.
On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are both strong acids;
HNO₃ is a strong acid that fully dissociates in water, resulting in a high concentration of H⁺ ions.
H₂PO₄⁻ is a weak acid in its conjugate acid form (dihydrogen phosphate), but as H₂PO₄⁻, it acts as a weak base rather than a weak acid.
Hence, D. is the correct option.
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How do ionic compounds and molecular compounds behave
differently in solution?
Answer : Molecular compounds dissolve in water by means of dipole-dipole attractions and hydrogen bond attractions. These attractions between the molecular compound and water don't form ions when a molecular compound dissolves.
Explanation: I hoped that helped,
How Many Equivalents Of Mg2+ Are Present In A Solution That Contains 2.50 Mol Of Mg2+?
To calculate the number of equivalents of Mg2+ in a solution, we need to divide the number of moles by 2, as each mole of Mg2+ contains 2 equivalents. In this case, the solution containing 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.
To answer this question, we need to know the definition of an equivalent. An equivalent is the amount of a substance that can combine with or replace one mole of hydrogen ions in an acid-base reaction. In the case of Mg2+, it can replace two hydrogen ions, so one equivalent of Mg2+ is equal to half a mole of Mg2+.
Given that the solution contains 2.50 mol of Mg2+, we can calculate the number of equivalents by dividing the number of moles by 2. This is because each mole of Mg2+ contains 2 equivalents, as we discussed earlier.
2.50 mol Mg2+ / 2 = 1.25 equivalents of Mg2+
Therefore, the solution that contains 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.
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what carbonyl compound and alcohol are formed by hydrolysis of each acetal
Acetals can be hydrolyzed using catalytic acid to produce a carbonyl compound and alcohol. If the acid concentration is increased, acetal can be hydrolyzed back to its initial aldehyde or ketone form.
This mechanism occurs in the opposite direction of the acetal formation mechanism. The hydrolysis of each acetal generates a carbonyl compound and an alcohol.What are Acetals?Acetals are organic compounds that are formed by the reaction of an aldehyde or ketone with two molecules of alcohol, and they have the following general structure: R1R2C(OR')2.Acetals can be regarded as derived from hemiacetals, which are formed by the reaction of an aldehyde or ketone with one molecule of alcohol.The carbonyl carbon in an acetal is bonded to two alkoxide (OR) groups, while the carbonyl carbon in a hemiacetal is bonded to only one. As a result, acetals are more stable than hemiacetals. Acetals are widely used in organic synthesis, including as protecting groups for carbonyl groups in reactions that would otherwise destroy them.Example:Acetal hydrolysis occurs when an acid catalyst is used to cleave the two ether bonds in the molecule. When an acetal is hydrolyzed with an acid catalyst such as H2SO4, a carbonyl compound and an alcohol are formed.Example:H2SO4 is added to the acetal, which hydrolyzes it, producing an aldehyde or ketone and two alcohol molecules. For example, if dimethyl acetal is hydrolyzed, it will yield acetone and two methanol molecules.
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17 OT-
2021
Subject Chemistry Date
7 Evaluate and discuss how do you think
the Number of the Valence electrons
relates to con elements Chemical properties
show many Valence election are found
in the following Atoms.
235/92 U + 1/0 n -> 138/55 Cs + 96/37 Rb + 2 1/0 n
what kind of reaction?
Answer:
Nuclear fission
Explanation:
This reaction is called a nuclear fission reaction. In this reaction, a radioactive decay process occurs in which a heavy nucleus spontaneously disintegrates into two lighter nuclei and several neutrons, with the release of a large amount of energy.
The imbalance between the number of neutrons and protons is responsible for this spontaneous disintegration. Until a stable daughter cell forms, the reaction proceeds.Give an example of a mutation and explain how it could affect an organism?
Your answer
Answer:
A mutation is a heritable change in the genetic material of an individual. The change can be large or small. Large changes involve the loss, addition, duplication, or rearrangement of whole chromosomes or chromosome segments. Mutations can affect an organism by changing its physical characteristics (or phenotype) or it can impact the way DNA codes the genetic information (genotype). When mutations occur they can cause termination (death) of an organism or they can be partially lethal.
Explanation:
Which option contains a true statement about cell theory?
O Louis Pasteur did an experiment that proved new cells come from the rotting remains of organisms.
Theodor Schwann did an experiment that proved new cells come from the rotting remains of organisms.
Louis Pasteur did an experiment that proved new cells come from existing, living cells.
Theodor Schwann did an experiment that proved new cells come from existing, living cells.
Anatomist and physiologist Theodor Schwann is best known for formulating the cell doctrine, which holds that all living things are made up of cells.
What is meant by cell theory?Theodor Schwann put forth the classical cell theory in 1839. This theory consists of three parts. All organisms are composed of cells, according to the first section. The basic building blocks of life exists cells, according to the second section.
Anatomist and physiologist Theodor Schwann is best known for formulating the cell doctrine, which holds that all living things are made up of cells. He proved that the cell is the fundamental building block of all living things.
All known living things are composed of one or more cells, according to the modern cell theory. By dividing, pre-existing cells become all living cells. All living things have cells as their basic unit of structure and operation.
Therefore, the correct answer is option d) Theodor Schwann did experimentation that demonstrated new cells come from existing, living cells.
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A substance is followed by the symbol (I) in a chemical Equation. What does the symbol Represent
Answer:
Iodine
Explanation:
Hope this helps. Think about me, when giving out brainiest.
Using the fictional periodic tale which of the following is the correct molar mass of H₂SO4
A
B
C
D
45.77 g
82.98 g
115.58 g
180.78 g
The mass of 6.022*10*23 atoms, molecules, or formula units make up one mole of a substance, which is known as the molar mass. This value is given in grams per mole.
The mass of a sample of a chemical compound divided by the quantity, or number of moles in the sample, measured in moles, is known as the molar mass of that compound. A substance's molar mass is a bulk characteristic rather than a molecular one.
Units: g/mol. Determine the atomic masses of each atom.Count the number of those atoms that are in the formula:The sum of all atomic masses. (Note: You must multiply it by the quantity of each atom in the formula if there are multiples of that atom.)Atomic masses:
Hydrogen - 1.01Sulphur - 32.06Oxygen - 16Number of atoms:
S - 1; O - 4; H - 2;
Molar mass = 32.06 + (1.01 * 2) + (16 * 4)
= 98.08 g/mol
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What is the pH of a solution that contains 0.003 M HBr?*
O 1.0
O 2.5
O 5.8
O 11.5
Answer:
pH = 2.5
Explanation:
Given data:
Concentration of HBr = 0.003 M
pH of solution = ?
Solution:
Formula:
pH = -log[H⁺]
by putting values,
pH = -log [ 0.003]
pH = 2.5
The question is in the photo for you to answer. An explanation is needed.
Based on the data provided and the equation of the reaction, the percent yield of the reaction is 76.8%.
What is the percent yield of the given reaction?The percent yield of the reaction is determined from the mole ratio of the given reaction as obtained from the equation of the reaction.
The equation of the reaction is: 2 KClO₃ ---> 2 KCl + 3 O₂
The mole ratio of KClO₃ and KCl is 1 : 1
The expected yield of the reaction is calculated as follows:
The molar mass of KClO₃ = 122.5 g/mol
The molar mass of KCl = 74.5
Mass of KCl expected = 32.5/122.5 * 74.5
Mass of KCl expected = 19.8 g
Percent yield = 15.2/19.8 * 100%
Percent yield = 76.8%
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What is the final temperature (in °C) of 120.1 g of water (specific heat = 4.184 J/g・°C) at 24.20°C that absorbed 950.0 J of heat?
i need help someone help me the chem 101 is due tomorrow
From the calculations, the final temperature of the object is 26.1 °C.
What is specific heat capacity?The specific heat capacity is defined as the temperature that is required to raise 1 Kg of a substance through a temperature rise of 1 K.
When;
H = 950.0 J
T1 = 24.20°C
m = 120.1 g
c = 4.184 J/g・°C
T2 = ?
H = mc(T2 - T1)
950 = 120.1 * 4.184(T2 - 24.2)
950 = 502.5T2 - 12160.5
950 + 12160.5 = 502.5T2
T2 = 950 + 12160.5/502.5
T2 = 26.1 °C
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calculate the concentration of a solution containing 1.8g of sodium carbonate in 862cm3 of water
Answer:
0.02 M
Explanation:
Given data:
Mass of sodium carbonate = 1.8 g
Volume of water = 862 cm³ (862/1000 = 0.862 L)
Concentration = ?
Solution:
Formula:
Concentration = number of moles / volume in L
Number of moles of sodium carbonate:
Number of moles = mass/molar mass
Number of moles = 1.8 g/ 106 g/mol
Number of moles = 0.02 mol
Concentration:
c = 0.02 mol / 0.862 L
c = 0.02 M
The lifting force on an airplane's wing does which of the following?
O A. Increases gravity
O B. Increases with speed
O C. Decreases with speed
D. Overcomes drag
The lifting force on an airplane's wing Increases with speed.
What is lifting force?The lifting pressure, lifting force, or virtually lift is the sum of all of the forces on a body that forces it to transport perpendicular to the route of flow.
Drag and Thrust are all “mechanical forces.” A mechanical force is generated through the interplay between an item and a fluid (liquid or gas). Weight is a “field force.” A subject's pressure no longer has to be in physical contact with the item to have an impact on the object.
The lift equation states that carry L is identical to the carry coefficient Cl times the density r times half of the velocity V squared instances the wing region A. For given air conditions, form, and inclination of the item, we have to decide a value for Cl to determine the raise.
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What is the Triangle G at 273 k for the following process at 1.0 atm?
The ΔG is 5.61 kJ.
To calculate the ΔG of a chemical reaction, it is necessary to use the formula of ΔG, and replace the values:
\(\begin{gathered} \Delta G=\Delta H-T\cdot\Delta S \\ \Delta G=31.0\frac{kJ}{\text{mol}}-273K\cdot0.093\frac{kJ}{\text{mol}} \\ \Delta G=5.61kJ \end{gathered}\)Remember to convert 93.0 J to kJ to solve it.
So, the ΔG for this reaction is 5.61 kJ.
Match each term to its correct description
1) Limiting reactant
2) Theoretical yield
3) Excess reactant
a) Reactant that has some leftover at the end of the reaction
b) Reactant that is entirely used up in the reaction
c) Mass of product that can be made by the given masses of reactants
Answer:
C
A
B
Explanation:
Excess reactant: Reactant that has some left over at the end of the reaction
Limiting reactant: Reactant that is entirely used up in the reaction
Theoretical yield: Mass of product that can be made by the given masses of reactants
The terms have been correctly matched to their descriptions as follows:
Limiting reactant: b) Reactant that is entirely used up in the reaction.Theoretical yield: c) Mass of product that can be made by the given masses of reactants.Excess reactant: a) Reactant that has some leftover at the end of the reaction.What is a Reactant?A reactant is a chemical compound or element that participates in a chemical reaction.
The limiting reactant is completely used up after the reaction while the excess reactant is the compound or element that is much more than what is normally required to complete the reaction.
The theoretical yield is the maximum quantity of the product that can be formed by the reactants.
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Na-23 has 12 neutrons.what is its atomic number?
A.11
B.12
C.23
D.34
Explain why. 4. What causes the convection cell to turn to the left at point B?
The ascending material collides with the unyielding lithosphere and becomes immobile.
How convection cell works?Point B is located right below the ridge, between two convections. Because the flow of fluid strikes the bottom of the crust/lithosphere and is pushed to turn left, this causes the cell to turn left. As the fluid moves between these sites, it cools down and adjusts to the lower temperature at the top of the mantle.A convection cell is the phenomena that happens when density variations exist within a body of liquid or gas in the science of fluid dynamics. Rising and/or falling currents are the primary characteristics of a convection cell as a result of these density discrepancies.For more information on convection cell kindly visit to
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Arrange following group of compounds in order of increasing acid strength: NH 3 ,PH 3 ,AsH 3 Rank from weak to strong. "Iוe vurtẹ rarixig carmot ve qetermined.
The order of increasing acid strength is NH3 < PH3 < AsH3. Ammonia (NH3) is the weakest acid, followed by phosphine (PH3), and finally, arsine (AsH3) is the strongest acid among these three compounds.
To arrange the compounds NH3, PH3, and AsH3 in order of increasing acid strength from weak to strong, we need to consider their electronegativity and bond strength.
NH3 (ammonia) has nitrogen, which is more electronegative than phosphorus in PH3 (phosphine) and arsenic in AsH3 (arsine). Higher electronegativity means that the central atom will hold the hydrogen atoms more tightly, making it difficult to donate a hydrogen ion (H+) and thus making the compound a weaker acid.
On the other hand, as we move down the periodic table from nitrogen to phosphorus and then arsenic, the bond strength between the central atom and hydrogen decreases. Lower bond strength makes it easier to donate a hydrogen ion, making the compound a stronger acid.
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a. How many Joules of energy are required to raise 3.50kg of water from 38.5 to 75.0C ? (specific heat of water is 4.184J/g C)(1000g=1kg)
b. How many grams of carbon are present if it requires 37.5 kJoules of energy to heat a sample from 30.0 to 55.0C ? (specific heat of carbon is 0.71 J/g C)
c. If 480.0 Joules is applies to a 50.0g sample of Hg in a thermometer that reads 25.0C, what will be the final temperature of the sample? (SH mercury is 0.14)
d. A 25.0kg sample of an unknown metal X requires 875kJ of energy to heat it from 55.0 to 125.0C. What is the specific heat of the unknown metal?
5.690x103 miles to meters.
900.0kg to grams
Please also give sig figs to all answers.
Answer fast please.
a.
A substance's specific heat tells you how much heat is required to increase the temperature of 1 g of that substance by 1°C.
The equation that establishes a relationshop between heat and change in temperature is
q = m • c • ∆T, where
q - heat absorbed
c - the specific heat of the substance, in your case of water
ΔT - the change in temperature, defined as the difference between the final temperature and the initial temperature
so:
q = 1.00 g • 4.18 J/g×°C • (75.0 - 38.5)°C
q = 152,57 J
just apply this formula for all exercises
A. How many Joules of energy are required to raise 3.50kg of water from 38.5 to 75.0C ? (specific heat of water is 4.184J/g C)(1000g=1kg)
Answer:
q = 534,506 Joules
q = 534.506 KiloJoules
534.506 KiloJoules or 534,506 Joules energy required to raise 3.50kg of water from 38.5 to 75.0C
What is sp.heat ?Sp. Heat is the heat required to increase the temperature of the 1 mass of a given substance by a \(1^{0}\) C temperature.
The formula of specific heat Cp = \(\frac{q}{m (∆T)}\)
Where,
q = energy of substance (Joules / KiloJoules),
Cp = Specific heat capacity of the substance (J/Kg.C),
m = mass of the substance
∆T = Change in temp.
Explanation:
Given data from que: -
Mss of the water (m) = 3.50 Kg = 3.50 × 1000 gm = 3500 gm
specific heat capacity of water (Cp) = 4.184J/g C
Change in temp (∆T) = 75.0 - 38.5 = 36.5
now, put all above given data in formula
we get
Cp = \(\frac{q}{m (∆T)}\)
q = Cp ×m×∆T
q = 4.184×3500×36.5
q = 534,506 Joules
q = 534.506 KJ
How many grams are in 21.4 mol Cl2 gas?
Cl2 = 70.9 g/mol
=
\(21.4 \: mol \times \frac{70.9 \: g}{1 \: mol} = 1517.26 \: g\)
What volume of oxygen can be produced from the decomposition of 25 g of aluminum chloride at 28°C in 750 mmHg
Answer:
Therefore, approximately 8.5 mL of chlorine gas can be produced from the decomposition of 25 g of aluminum chloride at 28°C and 750 mmHg.
Explanation:
The decomposition of aluminum chloride will not produce oxygen. Instead, it produces aluminum oxide and chlorine gas. The balanced chemical equation for this reaction is:
2AlCl3(s) → Al2O3(s) + 3Cl2(g)
To determine the volume of chlorine gas produced from the decomposition of 25 g of aluminum chloride, we need to use the ideal gas law, which is PV = nRT, where P is the pressure of the gas in atmospheres, V is the volume of the gas in liters, n is the number of moles of gas, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature of the gas in Kelvin.
First, we need to determine the number of moles of aluminum chloride. The molar mass of AlCl3 is 133.34 g/mol, so:
25 g AlCl3 × (1 mol AlCl3/133.34 g AlCl3) = 0.187 moles AlCl3
According to the balanced chemical equation, 2 moles of AlCl3 will produce 3 moles of Cl2 gas. Therefore, 0.187 moles of AlCl3 will produce:
0.187 moles AlCl3 × (3 moles Cl2/2 moles AlCl3) = 0.2805 moles Cl2
Now we can use the ideal gas law to calculate the volume of Cl2 gas produced. We need to convert the temperature from Celsius to Kelvin by adding 273.15.
PV = nRT
V = nRT/P
V = (0.2805 mol) × (0.0821 L·atm/mol·K) × (301.15 K) / (750 mmHg × 1 atm/760 mmHg)
V = 0.0085 L or 8.5 mL (rounded to two significant figures)
Therefore, approximately 8.5 mL of chlorine gas can be produced from the decomposition of 25 g of aluminum chloride at 28°C and 750 mmHg.
1. How much energy, in J and kJ, is required to raise the temperature of 432.1 g of aluminum metal from 23.6 °C to 41.6 °C?
CAFF 0.90 J/g °C
Answer:
25.1350 because if it has positive it can be transferred from positive to negative which makes equal.
From the list provided below, choose those observations that accurately describe the mineral presented in this image.This mineral has a metallic luster.
This mineral is opaque, meaning that it is not clear; light does not pass through it.
This mineral has cleavage.
The mineral presented in the image has a metallic luster. It is opaque, which means that it is not clear and light does not pass through it. It also has cleavage, which refers to the tendency of a mineral to break along planes of weakness.
The cleavage is evident in the image, as the mineral appears to have flat, smooth surfaces that intersect at sharp angles when it is broken or fractured.Cleavage is one of the most important properties of a mineral because it provides information about the way in which the mineral will break when subjected to external forces.
A mineral with good cleavage will break into pieces that have a smooth, flat surface, while a mineral with poor cleavage will break into pieces that have an uneven surface. This property is often used by mineralogists to help identify minerals since it is unique to each mineral.
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The mineral’s luster, opacity, and cleavage define its properties. Metallic luster means it reflects light like metal, opacity implies no light passes through it, and cleavage speaks to how it breaks.
Explanation:In order to determine the characteristics of a mineral, we assess attributes such as the mineral's luster, opacity, and cleavage. The metallic luster refers to how light interacts with the surface of a mineral, metallic luster means the mineral reflects light as a polished metal would.
When a mineral is opaque, it means that light does not pass through it at all - it is not transparent or translucent. Lastly, a mineral's cleavage refers to how it breaks or fractures along distinctive planes. To accurately describe the mineral in the image, these three characteristics would need to be observable.
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