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3 years ago

Which of the following statements is consistent with the electron configuration 1s22s22p63s23p4?

Chemistry

1 answer:

spayn [35]3 years ago

6 0

Answer:

Explanation:

When finding the element based on its electronic configuration the subscripts gives the number of electrons in the element.

In the given example total number of subscripts are 16. This means the element has 16 electrons which is equal to the atomic number of the element. hence, the element is Sulphur.

Here, s, p, d, and f are orbitals. So, as per the EC given, 3p orbital has 4 electrons in it. Hence, option (a) is correct.

Since, s, p, d, and f are orbitals and not shells, subshells. Therefore, other options are incorrect.

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Butane, C4H10 burns in oxygen. How many grams of water vapor, H2O, are produced by the combustion of 580 grams of butane at stan

zepelin [54]

Answer:

The answer to your question is 900 g of water vapor

Explanation:

Data

mass of H₂O = ?

mass of butane = 580 g

Balanced chemical reaction

2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H₂O

Process

1.- Calculate the molar weight of butane and water

Butane (C₄H₁₀) = 2[(12 x 4) + (1 x 10)]

= 2[48 + 10]

= 2[58]

= 116 g

Water (H₂O) = 10[(1 x 2) + (1 x 16)]

= 10[2 + 16]

= 10[18]

= 180 g

2.- Use proportions and cross multiplication to find the mass of water vapor

116 g of butane ------------- 180 g of water

580 g of butane ---------- x

x = (580 x 180) / 116

x = 900 g of water vapor

3 0

3 years ago

What is the mass of 1 mole of lithium?

Korolek [52]

Answer: The mass of 1 mole of lithium is 6.941 grams.

Explanation:

To calculate the mass of a compound or element, we use the formula used to calculate the number of moles:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Where,

Number of moles of lithium = 1 mole

Given mass of lithium = ? g

Molar mass of lithium = 6.941 g/mol

Putting value in above equation, we get:

$1mole=\frac{\text{Given mass}}{6.941g/mol}\\\\\text{Mass of lithium}=6.941g$

Hence, the mass of 1 mole of lithium is 6.941 grams.

5 0

3 years ago

Read 2 more answers

Calcium chloride, CaCl2, is commonly used as an electrolyte in sports drinks and other beverages, including bottled water. A sol

zhannawk [14.2K]

Answer:

Mole percent of $CaCl_{2}$ in solution is 1.71%

Explanation:

Number of moles of a compound is the ratio of mass to molar mass of the compound.

Molar mass of $CaCl_{2}$ = 110.98 g/mol

Molar mass of $H_{2}O$ = 18.02 g/mol

Density is the ratio of mass to volume

So, mass of 60.0 mL of water = $(60\times 0.997)g=60.8g$

Hence, 6.50 g of $CaCl_{2}$ = $\frac{6.50}{110.98}moles$ of $CaCl_{2}$ = 0.0586 moles of $CaCl_{2}$

60.8 g of $H_{2}O$ = $\frac{60.8}{18.02}moles$ of $H_{2}O$ = 3.37 moles of $H_{2}O$

So, mole percent of $CaCl_{2}$ in solution = \frac{n_{CaCl_{2}}}{n_{total}}\times 100% = $\frac{0.0586}{0.0586+3.37}\times 100$ % = 1.71%

5 0

4 years ago

10. Copper(i) bromide reacts with magnesium metal: 2 CuBr + Mg → 2 Cu + MgBrz

velikii [3]

Answer:

72.6 grams

Explanation:

I got this answer through stoichiometry. For every 1 mole of Mg, 2 moles of CuBr are consumed. Because of this, multiply the moles of Mg by 2. Then, convert moles to grams.

5 0

3 years ago

Read 2 more answers

The sodium isotope with 13 neutrons. Express your answer as an isotope

wariber [46]

Answer:

$\large\boxed{\large\boxed{^{24}_{11}Na}}$

Explanation:

The question is asking to write the isotopic symbol of the form $^A_ZX$ for the sodium isotope with 13 neutrons.

In general, the isotopic symbol in the given form shows:

The element's chemical symbol: X

A: mass number of the isotope, written as a superscript to the left of the element's simbol, and

A = number of protons + number of neutrons

Z: atomic number of the isotope, written as a subscript to the left of the elements's symbol,

Z = number of protons

The atomic symbol of sodium is Na.

The atomic number, or number of protons, is the same for every isotope of the element, and you can find it in any periodic table. Tha atomic number of sodium is 11. Thus:

Z = 11

The mass number is the number of protons plus neutrons, hence:

A = 11 + 13 = 24

Now you can write the isotope symbol for the sodium isotope with 13 neutrons:

$^{24}_{11}Na$

6 0

4 years ago