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stiks02 [169]
3 years ago
7

Given, 2Ca + O2 -> 2CaO, what is the 2 located in front of calcium called??

Chemistry
1 answer:
EleoNora [17]3 years ago
3 0
Moles used to react
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Which of the following pollutants could be reduced through proper maintenance and area ventilation to improve human health?
azamat

Answer:

Chimney soot

Explanation:

  • The periodicity of chimney used in homes is very highly harmful to human health.
  • If proper maintenance and cleanliness and ventilation are taken care of on such organic compounds, it can also control human health.
  • Carbon compounds form chimneys are highly harmful to human health if timber or coal-fired black chimney soot can be disposed of from time to time and with constant maintenance we can control pollution.
4 0
3 years ago
PLEASE HELP!!! what occurs along a convergent plate boundary
forsale [732]

your answer is c. your welcome

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6 0
3 years ago
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A chemist dissolves 484 .mg of pure perchloric acid in enough water to make up 240.mL of solution. Calculate the pH of the solut
sdas [7]

Answer:

1.70

Explanation:

The molar mass of perchloric acid is 100.46 g/mol. The moles corresponding to 484 mg (0.484 g) are:

0.484 g × (1 mol/100.46 g) = 4.82 × 10⁻³ mol

4.82 × 10⁻³ moles are dissolved in 240 mL (0.240 L) of solution. The molar concentration of perchloric acid is:

4.82 × 10⁻³ mol/0.240 L = 0.0201 M

Perchloric acid is a strong monoprotic acid, that is, it dissociates completely, so [H⁺] = 0.0201 M.

The pH is:

pH = -log [H⁺] = -log 0.0201 = 1.70

8 0
3 years ago
A solution containing 1.0 M NiCl2 and 1.0 M SnBr2 undergoes electrolysis by passing a current between two platinum electrodes. W
scoray [572]

Answer:

Sn2+ (aq) + 2e- → Sn(s) ℰ° = -0.14 V

Explanation:

A close look at all the options shows that the most feasible first reaction is the reduction of tin II ion to ordinary metallic tin.

Given the two half cells, nickel is oxidized in one half cell to Ni II while in the second half cell, tin II ion is reduced to metallic tin. The platinum electrodes simply act as electron conduits in the cell.

4 0
3 years ago
The iupac name for baking soda, a common leavening agent, is sodium bicarbonate. identify the correct formula.
Greeley [361]
The chemical formula of baking soda aka sodium bicarbonate is NaHCO3
8 0
3 years ago
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