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3 years ago

How many different elements are in the compound sodium carbonate

Chemistry

1 answer:

Alona [7]3 years ago

6 0

Answer:

There are 6 different elements in sodium carbonate

Explanation:

Na - sodium

C - carbon

O - oxygen

Since there are two atoms of Na and three atoms of O

i. e Na2CO3

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A cylinder, with a piston pressing down with a constant pressure, is filled with 1.90 moles of a gas (n1),

Alexandra [31]

Answer:

31.58 L

Explanation:

From the question given above, the following data were obtained:

Initial mole (n₁) of gas = 1.90 moles

Initial volume (V₁) = 40 L

Final mole (n₂) = 1.90 – 0.40 = 1.5 moles

Final volume (V₂) =.?

The final volume of the gas can be obtained as follow;

V₁ / n₁ = V₂ / n₂

40 / 1.9 = V₂ / 1.5

Cross multiply

1.9 × V₂ = 40 × 1.5

1.9 × V₂ = 60

Divide both side by 1.9

V₂ = 60 / 1.9

V₂ = 31.58 L

Thus, the final volume of the gas is 31.58 L

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3 years ago

Gerald's science teacher mixed room temperature samples of hydrochloric acid and sodium hydroxide in a large beaker. The solutio

shutvik [7]

Answer: Option (D) is the correct answer.

Explanation:

The chemical reaction equation will be as follows.

$HCl + NaOH \rightarrow NaCl + H_{2}O$

This means a new substance has been formed and a chemical change has taken place.

A chemical reaction in which heat energy is absorbed by the reactant molecules is known as an endothermic reaction.

For example, $A + B + Heat \rightarrow AB$

On the other hand, a chemical reaction in which heat energy is released by the reactant molecules is known as an exothermic reaction.

For example, $C + D \rightarrow CD + Heat$ is an exothermic reaction.

Thus, we can conclude that in the given situation the beaker most likely felt warm because a chemical reaction was producing a new substance.

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3 years ago

Is the following true or false? If a gas were truly an ideal gas, it would be impossible to liquefy or solidify it by cooling or

kirza4 [7]

The answer is true. Gas will always be gas.

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3 years ago

What do scientists call organisms, such as plants, which make their own food?

larisa [96]

Most plants are called autotrophs they make their own food

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3 years ago

12. How is the melting point of a substance related to its freezing point? Both indicate the temperature at which the solid and

krok68 [10]

Both indicate the temperature at which the solid and liquid states of a substance are in equilibrium would be your answer.

This is beacause the melting point of a substance is the same as the freezing point of a substance. At this particular temp, the substance can be either a solid or a liquid.

hope this helps!

8 0

3 years ago

Read 2 more answers