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4 years ago

How do you find the metal “M”

Chemistry

1 answer:

Elodia [21]4 years ago

5 0

M = Sr (strontium)

Step 1. Calculate the moles of CO_2.

Moles of CO_2 = 0.395 g CO_2 × (1 mol CO_2/44.01 g CO_2)

= 0.008 975 mol CO_2

Step 2. Calculate the moles of MCO_3.

Moles of MCO_3 = 0.008 975 mol CO_2 × (1 mol MCO_3/1 mol CO_2)

= 0.008 975 mol MCO_3

Step 3. Calculate the molar mass of MCO_3

MM = grams/moles = 1.324 g/0.008 75 mol = 147.5 g/mol

Step 4. Calculate the atomic mass of M

M_r = x + 12.01 + 3×16.00 = x + 60.01 = 147.5

x = 147.5 – 60.01 = 87.5

Step 5. Identify M.

The element with the closest atomic mass is Sr (A_r = 87.6).

∴ M = Sr and the compound is SrCO_3.

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Potassium chlorate is a white, crystalline solid. It can be broken down into potassium chloride (a salt)

lions [1.4K]

Answer:

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and

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7 0

3 years ago

Read 2 more answers

Select all of the items that are true about a sample of water vapor at 101°C as it cools.

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<h3>Answer;</h3>

A) Its temperature will fall continuously until it condensed into a liquid.

<h3>Explanation;</h3>

Steam or water vapor is the gaseous state of liquid water. When water vapor above a temperature of 100 degrees Celsius is cooled, the temperature falls continuously, and it undergoes condensation at a temperature of 100 degrees Celsius and turns into liquid water.
The change of state from gaseous to liquid state occurs as a result of latent heat of vaporization that the water vapor carries.

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3 years ago

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1. How is melting point of a solid determined?

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Melting points are often used to characterize organic and inorganic crystalline compounds and to ascertain their purity.

Explanation:

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3 years ago

List of charge of elements that do not form compound easily

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Answer:

The highlighted words in the explanation.

Explanation:

A clue comes by considering the noble gas elements, the rightmost column of the periodic table. These elements—helium, neon, argon, krypton, xenon, and radon—do not form compounds very easily, which suggests that they are especially stable as lone atoms. What else do the noble gas elements have in common?

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3 years ago

What is the mass of water necessary to generate 11.2 L of hydrogen gas if calcium metal reacts with water at standard temperatur

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Answer:

The mass of water is 18 g

Explanation:

The reaction of calcium with water can be represented in the equation below:

Ca + 2H₂O --------->Ca(OH)₂ +H₂

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From the displacement reaction above, calculate the mass of water that will produce 22.4L of hydrogen gas at STP.

Mass of 2H₂O = 2(2x1 + 16) = 2X18 = 36 g/mol

Using proportional analysis;

36 g of 2H₂O produced 22.4 L of H₂, then

what mass of 2H₂O will produce 11.2L of H₂ ?

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22.4 L ----------------------------------> 36g

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Cross and multiply, to obtain the expression below

= (11.2 X 36)/22.4

= 18 g

Therefore, the mass of water is 18 g

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3 years ago