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forsale [732]
3 years ago
6

Hydrogen + copper(II) oxide= copper + steam, which substance is oxidized. explain your answers

Chemistry
1 answer:
Vsevolod [243]3 years ago
4 0
Hydrogen is oxidized. The H2 reactant has an oxidation number of 0 because it’s in its elemental form. In the H2O product, H has an oxidation number of +1. The increase in oxidation number is oxidation.
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tamaranim1 [39]
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3 years ago
A sample of metal has a mass of 16.5916.59 g, and a volume of 5.815.81 mL. What is the density of this metal
Oxana [17]

Answer:

=> 2.8554 g/mL

Explanation:

To determine the formula to use in solving such a problem, you have to consider what you have been given.

We have;

mass (m)     = 16.59 g

Volume (v) =  5.81 mL

From our question, we are to determine the density (rho) of the rock.

The formula:

p = \frac{m}{v}

Substitute the values into the formula:

​p = \frac{16.59 g}{5.81 mL} \\   = 2.8554 g/mL

= 2.8554 g/mL

Therefore, the density (rho) of the rock is 2.8554 g/mL.

5 0
2 years ago
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8 0
3 years ago
Read 2 more answers
How many grams of KCO3 are needed to make 20 L of a 2.5 M solution?
PolarNik [594]

Answer:

0.25 L of a solution with a molarity of 6M has 6*0.25 = 1.5 moles of the solute. The molar mass of ammonium sulfate is 132.14 g/mole. The mass of 1.5 moles is 132.14*1.5 = 198.21 g. Therefore 198.12 g of ammonium sulfate are required to make 0.25 L of a solution with a concentration of 6M.

Explanation:

7 0
3 years ago
If anyone can answer all these questions you can get 35 points
torisob [31]

Answer:

6) 225.8 g

7) 1.01 g

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Explanation:

6) Molar Mass of Lithium Bromine: 86.845

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7) Molar Mass of Neon: 20.180

20.180 * 0.05 = 1.01 g

8) Molar Mass of Water Vapor: 18.02

18.02 * 1.2 = 21.624 g

5 0
3 years ago
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