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2 years ago

A volume of saline solution had a mass of 61.4 g at 4°C. An equal volume of water at the same

Chemistry

1 answer:

Maurinko [17]2 years ago

5 0

Multiple by 2 because it was give u right answer

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Burning magnesium is introduced into steam

qaws [65]

Answer:

It produces magnesium oxide and hydrogen gas.

Explanation:

When magnesium burns with steam it produces magnesium oxide which is white in color and hydrogen gas. When magnesium burns, it mixes with the oxygen present in the air produces magnesium oxide in powder form. Magnesium react with oxygen by giving two electrons present in its valance shells while the oxygen needs two electron for completing their valance shell and becomes stable.

4 0

3 years ago

5K + KNO3 ------ 3K2O + N

masya89 [10]

Answer:

174,957.143 grams of potassium and 89,228.478 grams of potassium nitrate will be needed.

Explanation:

$5K +KNO_3\rightarrow 3K_2O + N$

Mass of nitrogen = 27 lbs = 12,247 g

1 lbs = 453.592 g

Moles of nitrogen = $\frac{12,247 g}{14 g/mol}=874.786 mol$

According to reaction, 1 mole of nitrogen is produced from 5 moles of potassium and 1 mole of potassium nitrate.

Then 874.786 mol of nitrogen will be obtained from :

$\frac{5}{1}\times 874.786 mol=4,373.928 mol$ of potassium.

Then 874.786 mol of nitrogen will be obtained from :

$\frac{1}{1}\times 874.786 mol=874.789 mol$ of potassium nitrate.

Mass of 4,373.928 moles of potassium:

$4,373.928 mol\times 40 g/mol=174,957.143 g$ of potassium

Mass of 874.789 moles of potassium nitrate:

$874.789 mol\times 102 g/mol=89,228.478 g$ of potassium nitrate

3 0

3 years ago

Use the following periodic table to identify the letter(s) that match each of the statements below.

Greeley [361]

Answer:

l and t

Explanation:

because they are in group one

4 0

3 years ago

Read 2 more answers

Which statement best describes how chemical equations demonstrate conservation of mass?

IrinaVladis [17]

ggExplanation:

dog just dog

3 0

4 years ago

Why are there two chlorine atoms for every magnesium atom in the compound NaCl2?

BlackZzzverrR [31]

Answer : Note : The formula give in the question needs to be corrected , the formula of two chlorine atoms for every magnesium atom in the compound is $MgCl_{2}$ which is Magnesium Chloride.

Explanation : To write the formula of the compound we need to know the charge of the atoms or elements involved in the formula.

Charge of Mg is +2 and charge of Cl is -1 , to write the formula of the compound we always criss cross the charges. And also when we write the formula the total (or net) charge of the compound should be 0. Charge of Mg is +2 so to get the total(net) charge as 0 we need two Cl atoms with each -1 charge.

Mg = +2 , Cl = -1 , Cl = -1

2 Cl = -1 + (-1) = -2

Mg = +2 and 2 Cl = -2

+2 -2 = 0

$MgCl_{2}\rightarrow Mg^{+2} + 2Cl^{-}$

So the formula for Magnesium Chloride is $MgCl_{2}$

8 0

3 years ago