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snow_tiger [21]
2 years ago
7

30. In a common experiment in the general chemistry laboratory, magnesium metal is heated in air to produce MgO. MgO is a white

solid, but in these experiments it often looks gray, due to small amounts of Mg3N2, a compound formed as some of the magnesium reacts with nitrogen. Write a balanced equation for each reaction.
Chemistry
1 answer:
grigory [225]2 years ago
6 0

Answer: 2Mg + O2 》 2MgO

3Mg + N2 》Mg3N2

Explanation:

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A solution is made containing 4.6 g of sodium chloride per 250g of water.
lozanna [386]

Answer:

\large \boxed{1.81 \, \%}

Explanation:

\text{Mass percent} = \dfrac{\text{mass of solute} }{\text{mass of solution}} \times 100 \, \%

Data:

Mass of NaCl =      4.6 g

Mass of water = 250    g

Calculations:

Mass of solution = mass of NaCl + mass of water = 4.6 g + 250 g = 254.6 g.

\text{\% m/m} = \dfrac{\text{4.6 g} }{\text{254.6 g}} \times 100 \, \% = \mathbf{1.81 \, \%}\\\\\text{The percent by mass of NaCl is $\large \boxed{\mathbf{1.81 \, \%}}$}

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3 years ago
How many moles of n are in 0.163 g of n2o?
zimovet [89]

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3 years ago
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Sodium(na) is a highly reactive metal and chlorine is a poisonous gas. Which compound do they form when they chemically combine?
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Sodium metal (Na) and chlorine gas (Cl) are two reactive and dangerous elements. Chlorine is a halogen gas that can cause respir
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What do think the answer is now?</span>
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3 years ago
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