3 years ago

1.Outline the results of the Cathode ray tube?

Chemistry

1 answer:

kobusy [5.1K]3 years ago

8 0

Answer:

this showed that the cathode rays traveled in straight line

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what volume will it occupied 40 degrees celsius a gas sample was collected when a temperature is 27 degrees celsius and the volu

love history [14]

T_1=27°C
T_2=40°C
V_1=1L
V_2=?

Using Charles law

$\boxed{\sf \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}}$

$\\ \sf\longmapsto V_1T_2=V_2T_1$

$\\ \sf\longmapsto 1(40)=27V_2$

$\\ \sf\longmapsto V_2=\dfrac{40}{27}$

$\\ \sf\longmapsto V_2=1.48\ell$

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3 years ago

In 0.4 mole of H2S, how many atoms of H are there?

Debora [2.8K]

Answer:

Explain

H: Ignoring the coefficient, we know there's 5+3=8 atoms

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3 years ago

KClO3 ---> KCl + O2 Balance the decomposition chemical reaction. A) KClO3 ---> KCl + O2 B) 2KClO3 ---> KCl + 3O2 C) 2KC

Damm [24]

And the answer is C.

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3 years ago

The chemical elements display periodicity when they're arranged according toQuestion 10 options:A) atomic mass.B) atomic volume.

BartSMP [9]

The periodic table is an ordered way of representing chemical elements. They were ordered according to their atomic number, remember that the atomic number corresponds to the number of protons of the elements.

So the answer will be option C) Atomic Number

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1 year ago

Which of the following describes an exothermic reaction?

sattari [20]

Answer:

The answer to your question is: second option.

Explanation:

An exothermic reaction is a reaction that releases energy to the environment.

Thermal energy is absorbed by the system. This sentence is describing an endothermic reaction.

Thermal energy is absorbed by the surroundings. This sentence is describing an exothermic reaction.

Thermal energy is not transferred. This sentence is describing an isolated system.

The initial and final temperatures of the system remains the same. This option is incorrect is not describing an exothermic reaction.

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4 years ago