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3 years ago

99 POINTS!!!

Chemistry

2 answers:

seraphim [82]3 years ago

7 0

1. B. Orbital Shape

2. C. counterclockwise

3. D. Electrons enter orbitals of lowest energy first

4. C. 6

5. C. 2

6. A. Filled energy sublevels

Kitty [74]3 years ago

4 0

Hi,
Pauli exclusion principle tells you that if two electrons reside in the same orbital they will have opposite spin (1/2 and -1/2), so your answer here would be anti clockwise.
Hope this helps!

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3 years ago

If You are given 14 moles of C2H5OH(Ethanol) and 13 moles of O2( Oxygen), how

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Explanation:

1 ) first u have to balance the equation but in this case it is already balanced.

2) checking for the limiting reactant:

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol of H2O

14 mol of ethanol × (1mol H2O/ 1molof ethanol) = 14 mol of H2O

the less amount of moles produced from the O2 so the limiting reactant is oxygen

3) calculating the products moles

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol

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3 years ago

Which of the following provided evidence that most of the mass of the atom, as well as all of the positive charge, is concentrat

gayaneshka [121]

Answer:

5. the scattering of α particles by a metal foil

Explanation:

This is the classical Rutherford's experiment in which he bombarded a thin foil of gold with alpha particles which are positively charged helium nucleus.

He did observed that most of the particles passed through the foil relatively undeflected or if they were deflected it was by a very small angle.

Once in a while the alpha particle rebounded completely. An analogy is the one typically mentioned that it was as if we throw a ball at a piece of paper and it rebounds toward us.

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4 years ago

What type of liquid is more likely to be volatile, a liquid with polar molecules or a liquid with nonpolar molecules?

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3 years ago

Read 2 more answers

Enter your answer in the provided box. Before arc welding was developed, a displacement reaction involving aluminum and iron(III

Likurg_2 [28]

Answer:

grams of iron = 2262.4 g

Explanation:

The balanced chemical equation should be represented first.

2Al + Fe2O3 → Al2O3 + 2Fe

find the limiting reactants by converting to moles.

covert 1.64 kg to grams = 1640 g

moles = mass/molar mass = 1640/27 = 60.7407407407 moles

60.7407407407 × 1 mol-rxn /2 = 30.37 mol-rxn

The limiting reactant is Fe2O3 Therefore it will determine the yield of Iron

2Al + Fe2O3 → Al2O3 + 2Fe

molar mass of Fe2O3 = 56 × 2 + 16 × 3 = 112 + 48 = 160 g

atomic mass of iron = 56

mass of iron in the reaction = 56 × 2 = 112 g

moles = mass/molar mass

mass = moles × molar mass

mass = 20.2 × 160 = 3232 g

if 160 g of Fe2O3 give 112 g of iron

3232 g of Fe2O3 will give ? grams of iron

grams of iron = 3232 × 112/ 160

grams of iron = 361984 /160

grams of iron = 2262.4 g

7 0

3 years ago