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3 years ago

11

Consider the burning of gasoline and the evaporation of gasoline. which process represents a chemical change and which represent

s a physical change?

1 answer:

mart [117]3 years ago

5 0

Burning gas is a chemical change and evaporation of gas is physical change.

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What is the difinition of the word democracy?

N76 [4]

A system of government by the whole population or all the eligible members of a state, typically through elected representatives.
"a system of parliamentary democracy"

a state governed under a system of democracy.
plural noun: democracies
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control of an organization or group by the majority of its members.
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2 years ago

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Given the equation I = Q/t, solve for t.

larisa86 [58]

Answer: $t=\frac{Q}{I}$

Explanation:

$I=\frac{Q}{t}$

Multiply by t on both sides.

$t*I=\frac{Q}{t}*t$

$tI=Q$

Now divide by I to isolate t.

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3 years ago

What genotype will appear in box 4?

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The genotype will be (tt)
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2 years ago

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Some magnesium powder was mixed with some copper( II)oxide and heated strongly. there was a victorious reaction producing a lot

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Reaction:

$\mathrm{Mg \: + \: CuO \rightarrow Cu\: + \: MgO}$

Magnesium is a stronger reducing agent than copper and is thus able to reduce copper(II) oxide.

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3 years ago

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What is the empirical formula of a compound containing 5.03 grams carbon, 0.42 grams hydrogen, and 44.5 grams chlorine?

djverab [1.8K]

The empirical formula of the compound is CHCl₃.

<h3>Calculation:</h3>

Given,

Mass of carbon = 5.03 g

Mass of hydrogen = 0.42 g

Mass of chlorine = 44.5 g

Molecular weight of carbon = 12 g

Molecular weight of hydrogen = 1 g

Molecular weight of chlorine = 35.4 g

First, calculate the moles of each element,

Moles = given mass/ molecular weight

Moles of carbon = 5.03/12 = 0.42

Moles of hydrogen = 0.42/1 = 0.42

Moles of chlorine = 44.5/ 35.4 = 1.26

Divide the moles of each element by the smallest number of moles,

0.42 mol of C/ 0.42 = 1 C

0.42 mol of H/ 0.42 = 1 H

1.26 mol of Cl/0.42 = 3 Cl

The ratio of elements is 1:1:3

Therefore the empirical formula of the compound will be CHCl₃.

Learn more about empirical formula here:

brainly.com/question/20708102

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2 years ago