To determine the molar mass of an element, one must know the element's
a. number of isotopes.
b average atomic mass
c avogradro constant
d atomic number​

Answers

Answer 1

Answer:

d

Explanation:

from you know the atomic number it should be easy to find

Answer 2

To determine the molar mass of an element, one must know the element's atomic number​. Therefore, option D is correct.

What is the atomic number ?

An element's atomic number (Z) is the number of protons in the nucleus of each atom of that element. This means that the number of protons is the feature that distinguishes each element from all others. Elements differ based on their atomic number.

Because the combined masses of protons and neutrons account for nearly all the mass of a given atom, the atomic mass of a single atom can be calculated by adding the total number of protons and neutrons of that particular isotope.

The atomic mass of any element on the periodic table can be used to calculate its molar mass.

Thus, option D is correct.

To learn more about an atomic number, follow the link;

https://brainly.com/question/16858932

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Related Questions

A sample of chlorine gas is stored at a temperature of -25oC. If the chlorine gas's temperature is raised to 52oC, its volume increases to 2.60 L. What is the initial volume of the gas?

Answers

Answer:

whats ur answer options

Explanation:

...

its b

In hospitals, staff members wear shoes with special soles to prevent build up of static charge as they walk. Why?Single line text.

Answers

Answer:

The correct answer is - sudden static charge could damage sensitive medical equipment.

Explanation:

Staff members of a hospital or medical institution wear special shoes that are able to prevent static charge as they walk. These shoes help to prevent static charge as we know that the sudden transfer of a static charge to medical equipment may alter the reports or damage sensitive equipment. This type of static charge is negative or positive due to electronic devices touches the device leads to damage of electric devices.

Thus, the correct answer is - sudden static charge could damage sensitive medical equipment.

Let's say that you were given the following
problem:
A gas that exerts a pressure of 151 mm Hg in a
container with a volume of L will exert a
pressure of 166 mm Hg when transferred to a
container with a volume of 0.532 L.
Let's begin by assigning our variables. Let's say
that P1 = 151 mm Hg. What is V2?

Answers

Answer:

V2~0.4839M

Explanation:

We're going to use Boyles law to answer the question.

Boyle's law:

P1V1=P2V2

P1=151mmHg

P2=166mmHg

V1=0.532L

V2=?

V2=(P1 x V1)/P2

V2=(151 x 0.532)/166

V2~0.4839M

Hope it helps:)

Answer: C. unknown

Explanation: got it right on acellus

What is the mass number of a atom with 10 protons and 13 neutrons

Answers

The answer to ya question is 23

what energy is produced when particles vibrate?

Answers

sound energy is produced when particles vibrate. When an object vibrates, it causes movement in surrounding air molecules.

help!! please this is late!!

Answers

Answer:

pentene

Explanation:

pentene is 5 carbon chain with a double bond. The ending -ene indicates presence of double bond.

Help me with chemistry! I got this answer wrong , what would be the right one?

Answers

Answer:

I probably think it's to achieve a higher energy state

Explanation:

-

Which statement accurately describes the formation of a covalent bond?

a. Protons are shared between atoms.
b. Electrons are shared between atoms.
c. Protons are transferred from one atom to another.
d. Electrons are transferred from one atom to another.

Answers

Answer: b. Electrons are shared between atoms

Explanation: electrons are shared, forming molecules, covalent compounds have weaker forces holding the molecules together

PLEASE HELP ASAP DUE SOON WILL MARK BRAINLIEST

Answers

1 is B ca mg fe cu 2 is C

find the no of moles of ca in 8g of ca​

Answers

Answer:

Thus,there are 0.2 mole in 8 g of calcium.

In the equation C H4 + O2 C O2 + H2 O, what are the products?

A) C H4 + H2 O
B) C O2 + H2 O
C) O2 C O2
D) C H4 + O2

Answers

The answer to this question is B; the products of this reaction is on the right after after the arrow

Answer:

Option B clearly shows the Products of the reaction

The back of a water droplet acts as a mirror. When light hits the back of the water droplet, it bounces back to our eyes. This is called ____________.

Answers

The back of a water droplet acts as a mirror. When light hits the back of the water droplet, it bounces back to our eyes. This is called reflection.

Help needed ASAP, I will mark your answer as brainliest.

Answers

I think the answer is C I think that bc I added 3 and the 2 which made it H5 and than multipled the 3 and the 2 which made it C6 than Cl

(2-2) Looking at the chemical formula CaF2 (calcium fluoride), what do you think this substance is made of? (Choose ALL that apply
Metal
Metalloid
Non-metal

Answers

Answer:

Metal

Non-metal

Explanation:

Ionic compounds are said to be formed when metals donate electrons to non metals.

The metals become positively charged while the nonmetals become negatively charged.

CaF2 is composed of Ca^2+ and F^-. Calcium is a metal of group 2 in the periodic table while F is a nonmetal of group 17 in the periodic table.

Hence CaF2 is composed of a metal and a nonmetal.

A mixture of oxygen( O2), dinitrogen monoxide (N2O), and argon (Ar) has a total pressure of 0.98 atm. What is the partial pressure of N2O, if the partial pressure of O2 is 0.48 atm and the partial pressure of Ar is 0.15 atm?

Answers

Answer: The partial pressure of [tex]N_{2}O[/tex] is 0.35 atm.

Explanation:

Given: Total pressure = 0.98 atm

Partial pressure of [tex]O_{2}[/tex] = 0.48 atm

Partial pressure of Ar = 0.15 atm

Partial pressure of [tex]N_{2}O[/tex] = ?

Total pressure is the sum of partial pressure of each component present in a mixture of gases.

Hence, partial pressure of [tex]N_{2}O[/tex] is calculated as follows.

Total pressure = [tex]P_{N_{2}O} + P_{O_{2}} + P_{Ar}[/tex]

Substitute the values into above formula as follows.

[tex]Total pressure = P_{N_{2}O} + P_{O_{2}} + P_{Ar}\\0.98 atm = P_{N_{2}O} + 0.48 atm + 0.15 atm\\P_{N_{2}O} = 0.35 atm[/tex]

Thus, we can conclude that the partial pressure of [tex]N_{2}O[/tex] is 0.35 atm.

When 35.47 g of sodium hydroxide react with boric acid (H3BO3), how many moles of sodium borate will be produced?

Answers

Answer:

5.83 g

Explanation:

First, you must start with a balanced equation so you can see the mole ratios.

NaOH + H₃BO₃ --> NaBO₂ + 2H₂O

You can see that it takes 1 mole of sodium hydroxide to form 1 mole of sodium borate. 1:1 ratio

Now you must calculate how many moles of NaOH 35.47 g equals.

Na = 22.99 amu

O = 15.99 amu

H = 1.008 amu

NaOH = 39.997 amu

35.47 g ÷ 39.997 amu = 0.08868 moles of NaOH

Since it's a 1:1 ratio, the same number of moles of NaBO₂ is created. Now you must convert moles to grams.

Na = 22.9 amu

B = 10.81 amu

2 O = 31.998 amu

NaBO₂ = 65.798 amu

0.08868 moles x 65.798 = 5.83 g

The interaction of the skeletal and muscular systems to create movement and locomotion is regulated by which organ system?

Answers

Answer:

The muscoloskeletal system

Explanation:

The musculoskeletal system is made up of the body's bones (the skeleton), muscles, cartilage, tendons, ligaments, joints, and other connective tissue that supports and binds tissues and organs together. Its primary functions include supporting the body, allowing motion, and protecting vital organs.

What volume, in milliliters, of a 0.997 M KOH solution is needed to neutralize 30.0 mL of 0.0400 M HCl?

Answers

Answer:

1.2 mL

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated:

HCl + KOH —> KCl + H₂O

From the balanced equation,

Mole ratio of the acid, HCl (nₐ) = 1

Mole ratio of base, KOH (n₆) = 1

Finally, we shall determine the volume of the base, KOH needed to neutralize the acid, HCl as follow:

Molarity of base, KOH (M₆) = 0.997 M

Volume of acid, HCl (Vₐ) = 30 mL

Molarity of acid, HCl (Mₐ) = 0.0400 M

Volume of base, KOH (V₆) =?

MₐVₐ / M₆V₆ = nₐ/n₆

0.04 × 30 / 0.997 × V₆ = 1/1

1.2 / 0.997 × V₆ = 1

Cross multiply

0.997 × V₆ = 1.2

Divide both side by 0.997

V₆ = 1.2 / 0.997

V₆ = 1.2 mL

Thus, the volume of the base, KOH needed to neutralize the acid is 1.2 mL.

Liquid A has weaker intermolecular forces than liquid B. Which liquid would demonstrate greater surface tension?

Answers

Answer:

ronger intermolecular forces will produce greater surface tension .

The intermolecular forces present in a sample of water are hydrogen bonds . The high surface tension of water allows a paper clip to "float" on the surface of the water. It's not actually floating, it's resting on top of the hydrogen bonds that exist between the water molecules at the surface. See the video below which shows a paper clip resting on the surface of water in a beaker.

If the hydrogen bonds are removed or disrupted, the surface tension will decrease. Watch what happens to the paper clip in the video when detergent (which will disrupt hydrogen bonds) is added to the beaker.

Here is video showing how a paperclip can "float" on water - it's actually being held up by the hydrogen bonds formed between water molecules which give water its surface tension.

pls mark me the brainliest

Help needed ASAP, I will mark your answer as brainliest.

Answers

The answer is C if I’m wrong than I’m sorry

correct name for ZnS

Answers

Zinc sulfide (or zinc sulphide) is an inorganic compound with the chemical formula of ZnS. This is the main form of zinc found in nature, where it mainly occurs as the mineral sphalerite.

What is the molar mass of Na2CO3?
60.0 g/mol
O 106.0 g/mol
118.0 g/mol
141.0 g/mol

Answers

Answer:

The required molar mass is 106.0 g/mol

Explanation:

We know,

Molar mass of Na = 23 g/mol

Molar mass of C= 12 g/mol

Molar mass of O= 16 g/mol

∴Molar mass of Na2CO3 = {(23 X 2) + 12+ (16 X 3)}  g/mol

                                          = (46 + 12 + 48) g/mol

                                          = 106   g/mol

So, the required molar mass is 106.0 g/mol

The balanced equation for the combustion of Hexane,C6H14 , is

Answers

Answer:

[tex]2C _{6}H _{14} + 19O _{2}→12CO _{2} +14H _{2} O[/tex]

calculate the amount of hydrogen sulphide that would be liberated by the action of sulphuric acid on 4.4 gram of ferrous sulphide. (Fe=56;S=32)​

Answers

You will get iron sulfate and hydrogen sulfide gas (a.k.a. rotten egg gas).

FeS + H2SO4 = FeSO4 + H2S(g)

Change in Free Energy: ΔG(20C) = -66.6kJ (negative, so the reaction runs)

Change in Enthalpy: ΔH(20C) = -37.3kJ (negative, so the reaction is exothermic)

1.7 g of Hydrogen sulphide (H₂S) will be obtained.

We'll begin by writing the balanced equation for the reaction between ferrous sulphide (FeS) and sulphuric acid (H₂SO₄). This is illustrated below:

FeS + H₂SO₄ —> H₂S + FeSO₄

Next, we shall determine the mass of FeS that reacted and the mass of H₂S produced from the balanced equation. This is illustrated below:

Molar mass of FeS = 56 + 32

= 88 g/mol

Mass of FeS from the balanced equation = 1 × 88 = 88g

Molar mass of H₂S = (2×1) + 32

= 2 + 32

= 34 g/mol

Mass of H₂S from the balanced equation = 1 × 34 = 34 g

SUMMARY

From the balanced equation above,

88 g of FeS reacted to produce 34 g of H₂S.

Finally, we shall determine the mass of H₂S produced by the reaction of 4.4 g of FeS. This can be obtained as follow:

From the balanced equation above,

88 g of FeS reacted to produce 34 g of H₂S.

Therefore, 4.4 g of FeS will react to produce = (4.4 × 34)/88 = 1.7 g of H₂S.

Thus, 1.7 g of H₂S were obtained from the reaction.

Learn more: https://brainly.com/question/23115234

Can someone help me please? I’d appreciate it! Also please do not send me a link or delete your answer! Thanks

The piston of an internal combustion engine
compresses 218 mL of gas. The final pressure
is 15 times greater than the initial pressure.
What is the final volume of the gas, assuming
constant temperature?
Answer in units of mL.

Answers

Answer:

14.53ML

Explanation:

V1=218

V2=?

P2=15p1

USING BOYLE'S LAW

P1V1=P2V2

V2=P1V1/P2=P1(218ML)/15P1

=14.53ML

1. Suppose the mechanical advantage of a machine is 4, and the input force is 20 N.
What is the output force?
0 16 N
0 24 N
80 N
O5N

Answers

Answer:

80 N

Explanation:

you can multiple

force equal to mass x gravity

HELP ASAP
Which BEST explains the
relationship between the greenhouse
effect and global warming?

global warming causes the
greenhouse effect

greenhouse effect decreases
global warming

greenhouse effect increases
global warming

greenhouse effect is the same
as global warming

Answers

Answer:

greenhouse effect is the same as global warming

Explanation:

they both mean warming of the earths surface

Ca(OH)2+CO2=___+____​

Answers

Answer:

CaCO3 + H2O

Step by step explanation

Some please help me!!! ASAP

Answers

bestie you good there?

When in history was the origin of Sci-Fi as
genre?

Why then?

Answers

Answer:

The term science fiction was popularized, if not invented, in the 1920s by one of the genre's principal advocates, the American publisher Hugo Gernsback. The Hugo Awards, given annually since 1953 by the World Science Fiction Society, are named after him.

Explanation:

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