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3 years ago

Calculate the density of a material that has a mass of 56.6 g and a volume of 17.2 cm

Chemistry

1 answer:

Cerrena [4.2K]3 years ago

4 0

Answer:

d = 3.29 g/cm³

Explanation:

Given data:

Density of material = ?

Mass of material = 56.6 g

Volume of material = 17.2 cm³

Solution:

Formula;

d = m/v

d = density

m = mass

v = volume

by putting values,

d = 56.6 g/ 17.2 cm³

d = 3.29 g/cm³

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3 years ago

A 0.245-L flask contains 0.467 mol co2 at 159 °c. Calculate the pressure using the ideal gas law.

lubasha [3.4K]

Answer:

Pressure, P = 67.57 atm

Explanation:

Given the following data;

Volume = 0.245 L
Number of moles = 0.467 moles
Temperature = 159°C
Ideal gas constant, R = 0.08206 L·atm/mol·K

Conversion:

We would convert the value of the temperature in Celsius to Kelvin.

T = 273 + °C

T = 273 + 159

T = 432 Kelvin

To find the pressure of the gas, we would use the ideal gas law;

PV = nRT

Where;

P is the pressure.
V is the volume.
n is the number of moles of substance.
R is the ideal gas constant.
T is the temperature.

Making P the subject of formula, we have;

$P = \frac {nRT}{V}$

Substituting into the formula, we have;

$P = \frac {0.467*0.08206*432}{0.245}$

$P = \frac {16.5551}{0.245}$

Pressure, P = 67.57 atm

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3 years ago

The elements lithium and oxygen react explosively to form lithium oxide,Li2O. how many moles of lithium oxide will form if 4.37

anygoal [31]

From the equation,

4 mole of lithium produces 2 mole of lithium oxide

4.37 mol of lithium produces (4.37÷4)x2 mol of lithium oxide

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3 years ago

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Vlad1618 [11]

Answer:

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Explanation:

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3 years ago

5. There is no water cycle where it is cold. O true O false

Archy [21]

Answer:

False

Explanation:

There is a water cycle wherever there is water. If it is cold, the water cycle will just be very slow.

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3 years ago