35 Answered Questions for the topic Atoms

#### How many individual Ni atoms are contained in 1.25 grams of Ni? (

I don't know if I'm missing something or not, but I've tried this question so many times. My answer is always wrong. I'm using the correct conversion formula, but my answer is always wrong.

04/15/22

#### How many individual H atoms are in a sample of C2H4Cl2 that also contains 12.1 grams of chlorine?

I really need help with this question. I have no clue how to put it into a formula that I can solve to get the answer.

03/09/22

#### COLLIGATIVE PROPERTY CHEMISTRY

Which compound will have the lowest impact in the colligative property? Why?A. 3 mol CaCl2B. 3 mol C6H12O6C. 3 mol NaClD. Both A and B

#### How many atoms are in 2.00 moles of Li?

just need some help, thank you in advance!

#### How many atoms are in 2.00 moles of Li?

just need some help, thank you in advance!

#### MOLECULAR GEOMETRY OF AMMONIA

Tell me if I indicated the right statements that would describe the molecular geometry of NH3 (Ammonia) if not, please kindly correct me.a. General Formula : AX3Eb. Total Number of Electron Domains...
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#### DETERMINE IF THE GIVEN QUANTUM NUMBERS ARE VALID

Determine whether the following sets of quantum numbers are valid or not. If valid, identify the atomic orbital being described and explain it briefly. Any explanations would help me a lot because...
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11/26/21

#### Which of the following is a valid set of quantum numbers?

Which of the following is a valid set of quantum numbers?a. {4, 1, -1, -1⁄2}b. {3, 1, -2, +1⁄2}c. {1, 0, -1, +1⁄2}d. {5, 2, 0, -1}

11/25/21

#### GIVE THE SPECIFIC SET OF QUANTUM NUMBERS [n, ℓ, mℓ,ms] OF THE FOLLOWING

GIVE THE SPECIFIC SET OF QUANTUM NUMBERS {n, ℓ, mℓ,ms} OF THE FOLLOWING:
Na
Al
Ca
Cu
Au

02/03/21

#### How many atoms are in 0.188 mol of Na?

How many atoms are in 0.188 mol of Na? (Show your work with unit conversions)

02/01/21

#### Allyl sulfide gives garlic its characteristic odor. Give the mass and number of carbon atoms.

a) The mass in grams of 2.62 mol of allyl sulfide. Answer in scientific notation.b) The number of carbon atoms in 72.8 g of allyl sulfide. Answer in scientific notation.

10/13/20

#### Chemistry Heisenberg Uncertainty Principle

A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mmm = 0.100 fg (where a femtogram, fg, is 10−15g) and is swimming at a velocity of v = 6.00 μm/s,...
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#### Identify each of the following atoms or ions, use the correct name/nomenclature...

1) 18 e- 16 p+ 16 n2) 8 e- 8 p+ 8 n3) 23 e- 26 p+ 28 n

11/17/19

#### Why does Kr have larger radius than Ar when Kr has a larger effective nuclear charge?

Looking at the atomic radius trend of the periodic table, Kr has a larger radius than Ar. But my textbook claims that Kr has a larger effective nuclear charge than Ar for n=3. Wouldn't that mean Kr...
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#### Calcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; the third has a mass of 40.00 amu. Which isotope is most abundant of the three? How do you know?

I want to say it is the isotope with the largest atomic mass unit, but there are no percentages so I don't know of a way to be sure which one could be more abundant.

05/30/19

#### Assignment For Physics

Why is the electron in the hydrogen atom not falling into the nucleus?

08/29/18

#### What are the Magic Numbers for Atoms?

Which one can be the possible Answer?
A. No. Of e that confer Atomic Stability.
B. n/p ratio that confer Nuclear stability.
C. Atomic No. Confer Nuclear stability.
D. Atomic mass indicates...
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#### Do both flasks contain the same number of atoms?

If two identical sealed flasks, one containing He and one containing Ne, are at the same temperature (298 K) but the pressure of He is 1atm and the pressure of Ne is 0.5 atm, will both flasks...
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Atoms

01/17/18

#### who said that electrons are in a definite orbit around the nucleus?

what guy said that electrons are in a definite orbit...

#### why will in half life radioactive decay the quantity will decay to half regardless of how big or small the original quantity was?

Suppose In first half-life radioactive decay radioactive atoms decay half their amount/quantity in a specific amount of time then in the second half-life why does it not decay according to its...
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Atoms

10/19/17

#### If we want to produce 12.75 g of water, how many grams of diborane would we start with?

Diborane, B2H6, was once considered for use as rocket fuel. The combustion reaction for diborane is:
B2H6(𝑔)+3O2(𝑔) ⟶ 2HBO2(𝑔)+2H2O (𝑙)

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