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3 years ago

In collision and explosions, the total momentum before is______the total momentum after, ill mark the brainiest

Chemistry

1 answer:

oee [108]3 years ago

5 0

Answer:

I think its less than

Explanation:

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Tick the correct choice and give reason why you have selected the particular choice. [20] 1. A cup of hot tea is left in the sam

Stells [14]

Answer:

C. The tea cools to room temperature, the ice cream melts and warms to room temperature.

Explanation:

The tea's temperature was higher than room temperature. The ice cream's temperature was lower than room temperature. After some time, both items will become room temperature, which results in cooling and melting.

4 0

4 years ago

Balance the equations

OLga [1]

Answer: a) $H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O$

b) $PCl_3+3H_2O\rightarrow P(OH)_3+3HCl$

c) $2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2$

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equations are :

$H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O$

$PCl_3+3H_2O\rightarrow P(OH)_3+3HCl$

$2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2$

3 0

3 years ago

a sample of carbon dioxide gas occupies a volume of 20 L at standard temperature and pressure (STP). what will be the volume of

fredd [130]

Volume of Argon = 59.972 L

<h3>Further explanation</h3>

In general, the gas equation can be written

$\large {\boxed {\bold {PV = nRT}}}$

where

P = pressure, atm

V = volume, liter

n = number of moles

R = gas constant = 0.08206 L.atm / mol K

T = temperature, Kelvin

At STP(0 C, 1 atm), 1 mol gas= 22.4 L

so for 20 L

$\tt \dfrac{20}{22.4}=0.893$

For Argon

P = 1 atm

T = 273 K x 3 =819 K (tripled)

n = 0.893 (the same number of moles)

R = 0.082 L/atm.mol K

$\tt V=\dfrac{nRT}{P}=\dfrac{0.893\times 0.082\times 819}{1}=59.972~L$

7 0

3 years ago

Which of the following is the test for chlorine gas?

lisov135 [29]

<span>Cl - Bleaches litmus paper.

The answer is A.
</span>

5 0

3 years ago

Why the moon is the barycenter of earth?

baherus [9]

Because it wanted to be

4 0

3 years ago