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4 years ago

A 20.0 g sample of a compound of nitrogen and oxygen contains 7.37 g of nitrogen. what is the formula of this compound?

1 answer:

8 0

<span>N2O3 Determine the number of moles of oxygen and nitrogen you have: Atomic weight nitrogen = 14.0067 Atomic weight oxygen = 15.999 Moles nitrogen = 7.37 / 14.0067 = 0.526176758 moles Moles oxygen = (20 - 7.37) / 15.999 = 12.63 / 15.999 = 0.789424339 moles So the nitrogen to oxygen ratio is 0.526176758 : 0.789424339 We need a ratio of small integers that's close to the above ratio, so divide by the smallest number in ratio, getting 1 : 1.500302564 The 1.500 isn't close, but it does indicate that multiplying by 2 should be useful, giving 2 : 3.000605127 And the ratio 2:3 looks good. So the empirical formula for the unknown compound is N2O3</span>

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3 years ago

A certain compound is made up of one phosphorus (P) atom, three chlorine (Cl) atoms, and one oxygen (O) atom. What is the chemic

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3 years ago

500 mL solution of calcium chloride with a concentration of 0.75 mol/L. The mass of solute needed to make this solution is ___ _

BabaBlast [244]

Answer:

41.63g

Explanation:

Given parameters:

Volume of CaCl₂ = 500mL = 0.5L

Concentration = 0.75mol/L

Unknown:

Mass of the solute needed = ?

Solution:

The mass of the solute can be derived using the expression below;

Mass = number of moles x molar mass

But,

Number of moles = Concentration x Volume

So;

Mass = Concentration x Volume x molar mas

Molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol

Mass = 0.75 x 0.5 x 111 = 41.63g

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3 years ago

While making chicken soup for his family one evening, Luis added the amount of salt the recipe called for. After tasting the sou

Trava [24]

Answer:

the soup become too salty through the process of osmosis

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3 years ago

Ytu perform an electrolysis reaction using FeCl, iron (1) chloride. Which of the following will happen?

FrozenT [24]

Answer:

The answer is "Option B"

Explanation:

when we react with FeCl, iron, and chloride to both the electrolysis. So, iron is charged positive ion, as well as passes to the negative, is cathode electrode. But there is a decrease in the cathode.

The equation can be defined as follows:

$FeCl_2$ $\longrightarrow$ $Fe + Cl_2$

In the above equation, when the iron chloride electrolysis solution, it will give the iron(II) and the chlorine. This process happens when the hydrogen chloride solution at a temperature of about 90 ° C.

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4 years ago