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3 years ago

What is the mass of 15 ml of aluminum if the density is 2.70 g/ml?

Chemistry

1 answer:

olga2289 [7]3 years ago

3 0

Answer:

40.5g

Explanation:

desnity = mass/volume

2.7 = mass/15

mass = 2.7 x 15

mass = 40.5 g

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Which of the following aqueous solutions

liraira [26]

Answer:

H2CO

Explanation:

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3 years ago

Which compound is an acidic oxide?

vladimir1956 [14]

Explanation:

Acidic Oxide

An acidic oxide reacts with water and produces an acid. Usually, it is the oxide of non-metals. Examples include SO2, CO2, SO3, Cl2O7, P2O5, and N2O5. It could also be the oxide of metals with high oxidation states, such as CrO3, Mn2O7, and V2O5.

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3 years ago

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Calculate the number of moles in each of the following compounds. 180 g of Zn

iVinArrow [24]

You can do this by dividing by the molar mass of Zn:

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3 years ago

2Na3N3 -> 2Na + 3N2<br><br> if 0.58 mol if NaN3 reacts, what mass of nitrogen would result

Ronch [10]

Answer:

Mass = 24.36 g of N₂

Explanation:

The balance chemical equation for the decomposition of NaNO₃ is as follow;

2 NaN₃ → 2 Na + 3 N₂

Step 1: Find moles of N₂ as;

According to equation,

2 moles of NaNO₃ produces = 3 moles of N₂

So,

0.58 moles of NaNO₃ will produce = X moles of N₂

Solving for X,

X = 3 mol × 0.58 mol / 2 mol

X = 0.87 mol of N₂

Step 2: Calculate mass of N₂ as,

Mass = Moles × M.Mass

Mass = 0.87 mol × 28.01 g/mol

Mass = 24.36 g of N₂

8 0

3 years ago

What is the correct order of decreasing size of the following ions?

Alja [10]

Answer:

C) P3– > Cl– > K+ > Ca2+

Explanation:

Ionic radius can be defined as the distance between the nucleus and the electron in the outermost shell of atom in its ionic state. When an atom looses an electrons(Cation) its ionic radius decreases, whereas when an atom gains an electron(anion), its ionic radius increases.

Among the given ions the ionic radius of

$P^{-3} =212 pm$