3 years ago

Does the amount of a substance affect the properties of a substance?

Chemistry

1 answer:

Veseljchak [2.6K]3 years ago

5 0

No, the properties of a substance are not affected by the amount of a substance.

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7. A square chunk of plastic has a length of 5 cm, width of 5 cm and height of 5 cm. It has a mass of 200 g. What is its density

BaLLatris [955]

Answer:

$d=1.6\ g/cm^3$

Explanation:

Given that,

The dimension of a square chunk of plastic is 5 cm × 5 cm × 5 cm

Mass, m = 200 g

We need to find its density

Density = mass/volume

It will form a cube. It volume = side³

So,

$d=\dfrac{200\ g}{5^3\ cm^3}\\\\d=1.6\ g/cm^3$

Hence density is $1.6\ g/cm^3$

5 0

4 years ago

1.50μm2. Convert this to square meters.

Verizon [17]

1.50x10^6 m2 is the answer you're looking for

6 0

3 years ago

A cylinder, with a piston pressing down with a constant pressure, is filled with 1.90 moles of a gas (n1), and its volume is 42.

EleoNora [17]

Avagadro's law gives the relationship between volume of gas and amount of moles of gas. It states that at constant temperature and pressure, volume of gas (V) is directly proportional to number of moles of gas (n).
V/n = k
where k - constant
$\frac{V1}{n1} = \frac{V2}{n2}$
V1 = 42.0 L
n1 = 1.90 mol
n2 = 1.90 mol - 0.600 = 1.30 mol
substituting the values in the equation
$\frac{42.0 L}{1.90 mol} = \frac{V}{1.30 mol}$
V = 28.7 L
Volume of the gas is 28.7 L

3 0

3 years ago

Write the chemical formulae of a)dinitrogen oxide b) calcium dihydrogen phosphate

il63 [147K]

Answer:

A) Dinitrogen Oxide:

=> $N_{2}O$ (Also called Nitrous Oxide)