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2 years ago

Lithium Nitride is a ionic bonded compound because?

1 answer:

7 0

M nitride, an ionic compound containing the Li + and N 3 − ions, is prepared by the reaction of lithium metal and nitrogen gas.

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Tanggung jawab kabinet

lara31 [8.8K]

Answer:

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Explanation:

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2 years ago

Plz Plz Plz help!!!!!

melisa1 [442]

The answer should be 1) as Ag is a metal, Si is a metalloid and I2 is a nonmetal

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3 years ago

Calculate the molality of a solution that contains 1.875 g of potassium chloride (KCl) in 175g water.

nydimaria [60]

Molality = moles of solute / kg of solvent

(1.875g KCl) x (1 mole KCl/74.5513 g) = 0.02515047 moles KCl

(175 g water) x (1kg/1000g) = 0.175 kg water

0.02515047 / 0.175 = 0.144 m/kg = answer

3 0

2 years ago

An aqueous solution contains 3.7 % NaCl by mass.

Tanya [424]

Answer:

- Molality:

$m=0.65m$

- Mole fraction:

$x_{NaCl}=0.0116\\x_{H_2O}=0.9884$

Explanation:

Hello,

- Molality: in this case, the solution is formed by 3.7% by mass of sodium chloride and water, thereby, we assume we have 100 g of solution in order to find the mass of sodium chloride as shown below:

$m_{NaCl}=\frac{100g*3.7\%}{100\%} =3.7g$

Hence, the moles of sodium chloride and kilograms of water are:

$n_{NaCl}=\frac{3.7g}{58.45g/mol} =0.063molNaCl\\m_{H_2O}=100g-3.7g=96.3g*\frac{1kg}{1000g}=0.0963kgH_2O$

With which the molality results:

$m=\frac{n_{NaCl}}{m_{H_2O}}=\frac{0.063molNaCl}{0.0963kg}=0.65m$

- Mole fraction: in this case, since we have previously computed the moles of sodium chloride, we now compute the moles of water as:

$n_{H_2O}=\frac{96.3g}{18g/mol} =5.35molH_2O$

Thus, the mole fraction of sodium chloride is:

$x_{NaCl}=\frac{0.063}{5.35+0.063} =0.0116\\x_{H_2O}=\frac{5.35}{5.35+0.063} =0.9884$

Best regards.

3 0

3 years ago

Read 2 more answers

Why are the bacterial endospores placed on the paper strip and not directly in the fermentation broth?

Artyom0805 [142]

The bacterial endospores are microorganisms formed due to nutrient deprivation. These are placed first on a paper strip and not directly in the fermentation broth because these microorganisms are very resistance, thus, they need to adjust to the environment first before being acclimated to it.

6 0

3 years ago