Answers
Answer:
2.3 Work with the numerator first: 165 mg is 0.165 g. ... 2.9 (a) 1 mg Mo 1 10 3 g
Explanation:
im pretty sure this is the answer
Related Questions
what is the percent by mass of nitrogen in the following fertilizers? NH3
Answers
The percent by mass of nitrogen in ammonia (NH3) is approximately 82.15%
Calculating the mass of nitrogen to the total mass of the compound and then expressing the result as a percentage will allow us to determine the percent by mass of nitrogen in NH3 (ammonia).
Ammonia's molecular structure, NH3, indicates that it is made up of one nitrogen atom (N) and three hydrogen atoms (H). We must take both the molar masses of nitrogen and ammonia into account when calculating the percent by mass of nitrogen.
Nitrogen's (N) molar mass is roughly 14.01 g/mol. The molar masses of nitrogen and hydrogen are added to determine the molar mass of ammonia (NH3). Since hydrogen's molar mass is around 1.01 g/mol, ammonia's molar mass is:
(3 mol H 1.01 g/mol) + (1 mol N 14.01 g/mol) = 17.03 g/mol = NH3.
Now, we can use the following formula to get the nitrogen content of ammonia in percent by mass:
(Mass of nitrogen / Mass of ammonia) / 100% is the percentage of nitrogen by mass.
Ammonia weighs 17.03 g/mol and contains 14.01 g/mol of nitrogen by mass. By entering these values, we obtain:
(14.01 g/mol / 17.03 g/mol) 100% 82.15 % of nitrogen by mass
Ammonia (NH3) has a nitrogen content that is roughly 82.15 percent by mass.
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Ibuprofen can be found in 800 mg doses in over-the-counter analgesics, such as Advil and Motrin. How many grams of iburofen
does such a tablet contain?
800 mg =
g
Answers
The grams of iburofen does such a tablet contain 800 mg = 0.8g Ibuprofen
1 g = 10^-3g = .001g
Ibuprofen has 800 mg doses in over-the-counter analgesic
800g = 800 × .001
= 0.8g
Ibuprofen is Nondteriodal Anti-inflammatory Drug (NSAID)Ibuprofen's Mechanism of Action is Decreases inflammation, pain, and fever through inhibition of cyclooxygenase activity and prostaglandin synthesisnonsteroidal anti-inflammatory medication (NSAID) used for pain relief and to reduce fever by stops inflammation and by blocking formation of cyclo-oxygenase (COX-2) a chemical mediator of inflammatory chemicals. i.e prostaglandinsIt comes under the Class analgesic (reduce pain) and antipyretic (FIRE - reduce fever)e side effects of ibuprofen NSAID are peripheral edema, fluid retention with edema, tinnitus, purpura, petechiae, anorexia, diarrhea, rash, nausea, vomiting, fatigue, dizziness, lightheadedness, anxiety, confusionTo know more about analgesic visit :
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How far will Gabby Goose fly if she is traveling at 30 mph every hour?
Answers
Answer:
s = 30 miles = 48.2 km
Explanation:
Since, Gabby Goose is flying at a constant speed. Therefore, the formula for the distance covered by Gabby Goose while flying is given as follows:
\(s = vt\)
where,
s = distance covered while flying = ?
v = speed of flying = 30 mph
t = time consumed = 1 h
Therefore, using these values in the equation, we get:
\(s = (30\ mph)(1\ h)\)
s = 30 miles = 48.2 km
Which statement best describes what happens during a chemical change?
Both the identity and the properties of a substance change.
Some properties of a substance change, but its identity remains the same.
The chemical properties of a substance change, but its physical properties rema
The physical properties of a substance change, but its chemical properties rema
Answers
Answer:
Both the identity and the properties of a substance change.
Explanation:
During most chemical reactions, both the identity and the properties of substances changes. The chemical and physical properties of a substance often changes during this kind reaction.
A chemical change has the following properties:
A new kind of substance forms. It is always accompanied by energy changesInvolves a change in mass of the substanceConsiderable amount of energy is involved in this reaction. The process is irreversibleAnswer:
Both the identity and the properties of a substance change.
Explanation:
In a chemical change, the matter gets transformed or changed into a new substance. In doing this, the identity of the substance, and its properties change as well.
- I got the question right on the quiz and got 100%
Hope this helps!
The following statements are either true or false. Read each sentences carefully, then write TRUE faLSE
1. A force cannot be seen
2. A force cannot be felt.
3. A force always causes things to move
When an object is at rest, no gravitational force is acting on it
5 Gravitational force pulls all things downward
5. Mass and weight are the same quantities
7. All objects on Earth have weight
8 Some forces are useful to people
9. Gravity makes it easy for a person to ride a bicycle up
10. Weight is measured in grams (R) and kilograms
Answers
1) T
2) F
3) F
4) F
5) T
6) F
7) T
8) T
9) F
10) ...T... grams are usually in lowercase g
if 84.9 grams of solid iron reacts with oxygen gas, how many molecules of oxygen will react
Answers
Answer:
Molecules of oxygen \(= 6.86 * 10^{23}\)
Explanation:
The balanced equation of reaction between iron and oxygen is
4 Fe + 3 O2 → 2 Fe2O3
4 moles of iron react with 3 moles of oxygen.
Mass of one mole of iron is 55.845
number of iron moles in 84.9 grams of solid iron is equal to
\(\frac{84.9}{55.845} \\= 1.52\)
Now 1 mole of iron will react with \(\frac{3}{4} = 0.75\) mole of oxygen
Thus 1.52 moles of iron will react with \(0.75 * 1.52 = 1.14\) moles of oxygen
Number of atoms of oxygen in 1.14 moles
\(1.14* 6.02 * 10^{23}\\\)
\(= 6.86 * 10^{23}\)
Is this an example of decomposition
2CH4 + 402 → 2C02 + 4H2O
Answers
Answer:
Identify each equation as a composition reaction, a decomposition reaction, or neither.
Fe2O3 + 3 SO3 → Fe2(SO4)3
NaCl + AgNO3 → AgCl + NaNO3
(NH4)2Cr2O7 → Cr2O3 + 4 H2O + N2
Solution
In this equation, two substances combine to make a single substance. This is a composition reaction.
Two different substances react to make two new substances. This does not fit the definition of either a composition reaction or a decomposition reaction, so it is neither. In fact, you may recognize this as a double-replacement reaction.
A single substance reacts to make multiple substances. This is a decomposition reaction.
Test Yourself
Identify the equation as a composition reaction, a decomposition reaction, or neither.
C3H8 → C3H4 + 2 H2
Explanation:
I hope I help :)))
When a sodium atom becomes an ion, the size of the atom
A
decreases by losing an electron,
B
decreases by gaining an electron,
с
increases by losing an electron,
D
increases by gaining an electron,
Answers
Sodium has an electron configuration of 2-8-1. Since sodium is a metal, it loses that one electron and becomes a positive ion. Since it is losing an electron, it is decreasing in size.
An unknown substance has a density of 4G/CM three and a volume of 25 CM three. What is its mass in grams
Answers
Answer:
100g
Explanation:
Formula
Mass
Density Volume
Mass = Density X Volume
Mass=4g/cm^3 X 25cm^3
Mass =100grams
Which of the following societies would have the lowest environmental impact?
A populous, highly industrialized society with high levels of consumption.
A less populated, highly industrialized society with moderate consumption levels.
A small population that farms using hand tools, has no modern technology, and grows their own food.
A large population with moderate industrialization and consumption levels.
Answers
The society with the least negative effects on the environment is probably the one with a small population, traditional farming methods, no access to contemporary technology, and self-sufficient food production.
This is due to the fact that their way of living is less dependent on modern infrastructure and technology, both of which have a negative impact on the environment. Additionally, their agricultural methods are probably more environmentally friendly and sustainable.
The environmental effects of the other societies on the list would all be greater. Because of the use of fossil fuels and the production of products that require a lot of resources, a big, industrialized society with high levels of consumption would have a significant carbon footprint.
It would still take a lot of resources to maintain its infrastructure and create products in a less populous, highly industrialized society with moderate consumption levels, which would have a negative effect on the environment.
Given that the size of the population alone would necessitate significant resource consumption and infrastructure development, a big population with moderate industrialization and consumption levels would also have a big effect on the environment.
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. The element fluorine has 9 electrons. Which is the electron configuration for an atom of fluorine? 1 s 2 3 s 2 5 p 2 3 s 2 3 s 2 3 p 2 1 s 2 2 s 2 2 p 5 1 s 4 2 s 5
Answers
The element fluorine has 9 electrons. The electron configuration for an atom of fluorine is 1s2 2s2 2p5.
What is Fluorine atom?Fluorine is one of the element of the periodic table. It have 9 as atomic number and 19 as mass number. The electronic configuration of fluorine is 1s2 2s2 2p5. It belongs to 17th group. It is most electronegative atom. Because it accept one electron to get stable electronic configuration.
It belongs to 2nd period and belongs to p-block.
What is electronic configuration?In the quantum chemistry and atomic physics, the electron configuration is defined as the distribution of the electrons of an atom or molecule in molecular or atomic orbitals. Electrons first enter clock wise then anti clockwise.
Thus, we concluded that element fluorine has 9 electrons. The electron configuration for an atom of fluorine is 1s2 2s2 2p5.
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What is the frequency of electromagnetic radiation that has a wavelength of 0.325 cm? In what region of the electromagnetic spectrum is this radiation located?
Answers
What was earth’s surface like? Landmasses? First land plants
Answers
Answer:
During the early Paleozoic Era, the Earth's surface was very different from what it is today. The continents were arranged differently, forming one large supercontinent called Pangea. This landmass was surrounded by a single large ocean called Panthalassa. The climate was much warmer and wetter than it is today, with no ice caps at the poles.
The first land plants, known as bryophytes, appeared during the early Silurian Period, around 430 million years ago. These plants were small and simple, lacking roots and vascular tissue. They grew in damp environments, such as along the edges of lakes and streams. They were important in the development of soils and in the colonization of land by other organisms, such as insects and other arthropods.
Who first proposed the idea of the atom
Answers
hi, there!
The ancient atomic theory was proposed in the 5th century bc by the Greek philosophers Leucippus and Democritus
When was electricity invented?
Answers
Answer:In 1752
Explanation:Benjamin franklin in 1752 to prove that lightning was electrical,he flew a kite during a thundorstorm.He tied a metal key onto the string and as he suspected it would ,electrically from the storms clouds flowed down the string ,which was wet and he received an electrical shock.
Electricity was discovered and understood by many scientists. Benjamin Franklin is given the credit for discovering electricity. In the year 1752, Benjamin Franklin conducted an experiment using a kite and key on a rainy day.
What is the primary function of the chromosome?
Answers
Answer:
Store the genetic instructions needed to specify traits.
In DNA, the primary function of chromosome is store the genetic instructions needed to specify traits.
What is DNA?
DNA is a hereditary material which is present in human beings as well as all other living organisms. Every cell which is present in an organism's body has DNA which is the same. Most of the DNA is situated in the cell's nucleus and small amount of it can be found in the cell's mitochondria as well.
Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.
DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule and a phosphate group. A base, phosphate sugar are together called as nucleotides.
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Why does an orange look orange?
Ο Α.
It reflects orange light and absorbs other colors.
O B. It absorbs orange light and reflects other colors.
C.
It reflects red and yellow light, only.
O D.
D. It absorbs red and yellow light, only.
Answers
which gas is fossil fuel
Answers
Answer:
methane
Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp
Adhesión refers to water ability to
Answers
Water molecules' propensity to attract other substances is known as adhesion.
What does water adhesion mean?Water molecules' interactions with one another are characterized by two qualities called cohesion and adhesion. and the interactions between water molecules and other things like leaves or even you. Cohesion is the tendency of water to adhere to itself. and adhesion denotes the propensity of water to adhere to other objects.
Why does adhesion force exist?Electrostatic or mechanical forces between two different types of material produce adhesion. Van der Waals forces and hydrogen bonding both contribute to cohesion.
Why does adhesion happen?Ionic, covalent, or hydrogen bonds are formed between the surface atoms of two distinct surfaces when there is chemical adhesion. In this way, chemical adhesion follows a pretty simple engineering principle: if surface molecules can link, then a network of these bonds will bind the surfaces together.
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Please help!
Suppose you need to perform single molecule detection. You have a CCD that can give detectable signal with 10000 electrons in a well if all 532 wells in the column of the CCD array are summed. Assuming you have F2 optics for collection, throughput to the CCD is 70%, the quantum efficiency of the CCD is 0.90 for the wavelengths you are looking at (detector have their own quantum efficiencies), the dye molecule you are detecting has a quantum efficiency of 0.80 and fluorescence lifetime of 25 ns, how long would you need to collect data in order to obtain a signal that is detectable? Assume the laser you are using gives you amble photons for the experiment.
If you have a 25 micron spot size, what concentration of molecule do you need in solution to ensure you will see a single molecule in ~ 5 percent of your experiments?
Throughput to the CCD is how much light you get to the CCD after reflection and other loses due to optical components.
Answers
A charge-coupled device (CCD) is a component that receives an electrical charge and transmits it to the following area.
What is single molecule technique?A charge-coupled device (CCD) is a component that receives an electrical charge and transmits it to the following area.An electrical charge can be received and transferred via a charge-coupled device (CCD) to another area where it can be altered, such as transforming it to an electronic value.High-powered telescopes and CCD device image sensor cameras can be utilized in astronomy.Once the Earth's rotation synchronizes with the telescope, the imaging system can focus for a number of hours on a single location in space.To learn more about CCD refer
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How many neutrons does this atom have?
04
O 6
O 10
O 14
plzzzz i need help i will give 50 points
Answers
Answer:
c maybe if right plz mark brainliest
Explanation:
Answer:
14
Explanation:
it 14 there are 14 neutrons
A red line is observed at 656.3 nm in the spectrum of atomic hydrogen. determine the values of ???? for the beginning and ending energy levels of the electron during the emission of energy that leads to this spectral line.
Answers
The beginning and ending energy levels of the electron during the emission of energy that leads to spectral line n(i)= 2 and n(f)=2
calculation :-(i) Calculation of energy of photon:-wavelength(λ) = 656.3 nm = 656.3 x 10^-9
E= hc / λ
E = energy of the photon
h=Planck's constant
c=speed of light
λ= wavelength of the photon
E= (6.626 x 10^-34)(3 x 10^8)/( 656.3 x 10^-9)
E = 3.028 x 10^-37J
(ii) Beginning and ending energy levels of the electron during the emission of energy that leads to this spectral line.It's a red line which means it falls in a visible region which is known as the Balmer series so;
n (f) = 2
ΔE= RH (1/n(f)^2 - 1/n(i)^2)
3.028 x 10^-37 =-2.18 x 10^-18(1/2^2 - 1/n(i))
n(i)= 2
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Calculate the average atomic mass of an element containing 39.9% of atoms with a mass of 69 amu and 60.1% of atoms with a mass of 71 amu. Show your work for credit and round your answer to one decimal place.
Answers
Answer:
70.202 amu
Explanation:
From the question given above, the following data were obtained:
Isotope A:
Abundance (A%) = 39.9%
Mass of A = 69 amu
Isotope B:
Abundance (B%) = 60.1%
Mass of B = 71 amu
Average atomic mass =?
The average atomic mass of the element can be obtained as follow:
Average atomic mass = [(Mass of A × A%)/100] + (Mass of B × B%)/100]
= [(69 × 39.9)/100] + [(71 × 60.1)/100]
= 27.531 + 42.671
= 70.202 amu
Therefore, the average atomic mass of the element is 70.202 amu
2) How will the changes listed affect the equilibrium concentrations of reactants and
products in the following reaction?
a) O3 is added to the system
b) O₂ is added to the system
203 (g) 302 (g)
c) The mixture is compressed to one-tenth its initial volume.
Answers
Answer: dont get it
Explanation:
an alien civilization has different names and symbols for six elements. place each element in the correct location in the periodic table
Answers
Answer: this is the correct answer :)
Explanation:
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Isotopes,ions,and atoms worksheet 2 answer key
Answers
Explanation:
Isotopes are defined as atoms of the same element but differ in the number of neutrons in their nucleus where a number of protons and electrons remain the same.Ions are defined as chemical species of an atom with an electrical charge.IO with a positive charge are called cations, and ions with a negative charge are called anions.Atom has three subatomic particles: protons, electrons, neutronsAtomic number (Z)= Number of protonsNumber proton = Number of electrons (isoelectric neutral atom)Atomic mass (A)= Number of protons + Number of neutronsThe chemical symbol of an element X is written as:\(^A_ZX^C\)
Where : Charge on ion = C
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Predidt the direction and the relative value of the dipole moment of the following bond: C-Cl
A. C ← CL electronegativity difference < 0.5
B. C ← CL electronegativity difference > 0.5
C. C → Cl electronegativity difference < 0.5
D. C → Cl electronegativity difference > 0.5
Answers
Answer:
D. C → Cl electronegativity difference > 0.5
Explanation:
The electro negativity of an atom in a compound refers to its ability to attract the electrons of a bond towards itself.
On the Pauling's scale, carbon has an electro negativity value of 2.55 while that of chlorine is 3.16. The difference in electro negativity between the both atoms is about 0.61.
The dipole is aslways directed towards the more electronegative atom. Hence the direction is ; C → Cl
How can knowledge of separating mixtures help you in daily life and within society? Answer below.
Answers
Answer:
I can say that knowledge of separating mixtures can help us in daily life and within society in the following ways:
1. Purification of water: Separation techniques are used to purify water for drinking and industrial purposes. It is essential to remove impurities from water to prevent diseases.
2. Recycling: Separation techniques are used to separate materials for recycling. This helps reduce the amount of waste in landfills and helps conserve resources.
3. Food industry: Separation techniques are used in the food industry to separate unwanted particles from food products. This helps ensure that the food we eat is safe and free from contaminants.
4. Medicine: Separation techniques are used in the pharmaceutical industry to separate and purify chemicals for use in medicine. This helps ensure that medicines are safe and effective.
5. Environmental protection: Separation techniques are used to remove pollutants from the environment. This helps protect our natural resources and prevent pollution-related health problems.
6. Oil and gas industry: Separation techniques are used to separate crude oil and natural gas into their various components. This helps in the production of energy and other useful products.
In summary, knowledge of separating mixtures is essential in our daily lives and within society. It helps ensure that we have access to safe and clean water, food, medicine, and energy, and also helps protect the environment.
Explanation:
the form of EMR that has less energy per photon than microwaves is ____?
Answers
Answer: radio wave frequencies have longer wavelengths and smaller
Energies per photon
Question 7
Anna is rolling a ball down a hill. As the ball rolls, the potential energy is changed to which type of energy?
A chemical energy
B
kinetic energy
С
light energy
D
stored energy