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3 years ago

Please help. Thanks:)

Chemistry

1 answer:

Vedmedyk [2.9K]3 years ago

8 0

D is true because NO2 is a catalyst, and a catalyst is a compound which makes a reaction occur faster (not necessarily more effectively, creating more product, but it decreases the amount of time it takes).

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Explain how gas pressure is measured

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Gas pressure is measured in mmHg with a barometer

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4 years ago

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Is carbon dioxide formed during incomplete combustion of methane? ...?

dexar [7]

Incomplete combustion occurs when the supply of air or oxygen is poor. Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide. The carbon is released as soot. Carbon monoxide is a poisonous gas, which is one reason why complete combustion is preferred to incomplete combustion.

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4 years ago

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If 65.39 g of zinc are mixed with some unknown mass of hydrochloride acid, 136.29 g of zncl2 are formed along with 2.00 g of hyd

zepelin [54]

How much hydrogen chloride acid was used?

72.916 g of hydrochloric acid was used.

Given:

Mass of Zn = 65.39 g

Mass of $ZnCl_{2}$ =136.29 g

Mass of $H_{2}$ = 2 g

Equation:

The chemical equation for the reaction of zinc with hydrochloric acid:

Zn + 2HCl → Zn $Cl_{2}$ + $H_{2}$

Hydrogen gas is created when zinc combines with hydrochloric acid, which causes the process to bubble ferociously. Another sign that a chemical reaction is taking place is the generation of a gas.

Calculation:

A number of equivalents equate:

Number of equivalents = $\frac{given mass}{Molecular Mass}$ x 1000 x equivalent factor

$\frac{x}{36.458}$ x 1000 x 1 = $\frac{136.29}{136.286}$ x 1000 x 2

$x$ = 36.458 x 2

$x$ = 72.916

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brainly.com/question/21290034

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2 years ago

Please Explain. Why does salt water boil at a lower temperature than tap water?

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We observe that heat capacity of salted water we will find that it is less than pure water. We now that it takes less energy to increase the temperature of the salt water 1°C than pure water. Which means that the salted water heats up faster and eventually reaches to its boiling point first.
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3 years ago

** worth 20 points + brainliest **

Bad White [126]

Answer : The correct option is, (D) $83^oC$