How many energy levels does sulfur have? A. 2 B. 3 C. 4 D. 14

The characteristic odor of pineapple is due to ethyl butyrate, an organic compound which contains only carbon, hydrogen and oxyg

Trava [24]

Answer:

C3H6O

Explanation:

Data obtained from the question. This includes:

Carbon (C) = 0.62069 g

Hydrogen (H) = 0.103448 g

Oxygen (O) = 0.275862 g

The empirical formula can be obtained as follow:

Step 1:

Divide by their molar mass.

C = 0.62069 / 12 = 0.0517

H = 0.103448 / 1 = 0.103448

O = 0.275862 / 16 = 0.0172

Step 2:

Divide by the smallest number.

C = 0.0517 / 0.0172 = 3

H = 0.103448 / 0.0172 = 6

O = 0.0172 / 0.0172 = 1

Step 3:

Writing the empirical formula.

The empirical formula is C3H6O

3 0

3 years ago

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What is the empirical formula of a compound containing 90 grams carbon, 11 grams hydrogen, and 35 grams nitrogen? A. C3H4N B. C2

Ierofanga [76]

Answer:

A. C₃H₄N

Explanation:

Firstly, we need to calculate the no. of moles of C, H, and N using the relation:

no. of moles = mass/molar mass.

∴ no. of moles of C = mass/molar mass = (90.0 g)/(12.0 g/mol) = 7.5 mol.

∴ no. of moles of H = mass/molar mass = (11.0 g)/(1.0 g/mol) = 11.0 mol.

∴ no. of moles of N = mass/molar mass = (35.0 g)/(14.0 g/mol) = 2.5 mol.

We should get the mole ratio of each atom by dividing by the lowest no. of moles (2.5 mol of N).

∴ the mole ratio of C: H: N = (7.5 mol/2.5 mol): (11.0 mol/2.5 mol): (2.5 mol/2.5 mol) = (3: 4.4: 1) ≅ (3: 4: 1).

So, the empirical formula is: A. C₃H₄N.

3 0

4 years ago

Complete the table below by filling in the principal quantum number n and angular momentum quantum number l for each electron su

Alja [10]

Answer:

For 4f the principal quantum number, n is 4 and the angular momentum quantum number l is 3

7s: n = 7 and l = 0

4p: n = 4 and l = 1

7p: n = 7 and l = 1

Explanation:

The principal quantum number gives the energy level of the electron in an atom. It shows the shells in which an electron is in an atom.

if n = 1, 2, 3, 4...; it corresponds to K, L, M, N... shells in an atom

The numerical coefficient of the subshell gives the pricipal quantum number.

for instance in 4f, the principal quantum number, n is 4 because 4 is the coefficient.

The angular momentum quantum number, l gives the energy sublevel or subshell.

Angular momentum quantum number has integral values, l = 0, 1, 2, 3... which correspond to s, p, d, f,.. orbitals.

Thus for 4f the principal quantum number, n is 4 and the angular momentum quantum number l is 3

similarly, for 7s: n = 7 and l = 0

4p: n = 4 and l = 1

7p: n = 7 and l = 0

using similar approach for others

3 0

3 years ago

A chemist pumps hydrogen gas (h2) from a tank into a reaction vessel containing 0.734 mol o2. the gases react to form water. if

fgiga [73]

Hydrogen + oxygen -> water

2H2 + O2 -> 2H2O (balanced)

2 moles of hydrogen gas will react with 1 mole of oxygen to produce 2 moles of water.

following that ratio, 0.734 mole of oxygen must need 0.734 × 2 moles of hydrogen to fully react.

answer is 1.468 moles of hydrogen.

6 0

3 years ago

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Find the relationships between the variables affected by gas:

butalik [34]

PV=nRT

Where:

P= pressure

V= volume

n= mol

R= universal gas constant

T= temperature

To get number of particles : apply the following equation.

n = N/L

Where ;

n =mol

N =number of particles

L =avagadro constant

3 0

4 years ago