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3 years ago

Class science A lunar eclipse occurs when

Chemistry

2 answers:

Licemer1 [7]3 years ago

8 0

Answer:

The moon is in earths shadow

Explanation:

Lunar) Moon in earths shadow

Solar) Earth in moon's shadow

NeTakaya3 years ago

3 0

Answer:

when the moon passes through earth's shadow

Explanation:

I'll be back soon I have to do my world History test

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10. A 2.36-gram sample of NaHCO3 was completely decomposed in an

Airida [17]

Answer:

0.79 g

Explanation:

Let's introduce a strategy needed to solve any similar problem like this:

Apply the mass conservation law (assuming that this reaction goes 100 % to completion): the total mass of the reactants should be equal to the total mass of the products.

Based on the mass conservation law, we need to identify the reactants first. Our only reactant is sodium bicarbonate, so the total mass of the reactants is:

$m_r=m_{NaHCO_3}=2.36 g$

We have two products formed, sodium carbonate and carbonic acid. This implies that the total mass of the products is:

$m_p=m_{Na_2CO_3}+m_{H_2CO_3}$

Apply the law of mass conservation:

$m_r=m_p$

Substitute the given variables:

$m_{NaHCO_3}=m_{Na_2CO_3}+m_{H_2CO_3}$

Rearrange for the mass of carbonic acid:

$m_{H_2CO_3}=m_{NaHCO_3}-m_{Na_2CO_3}=2.36 g - 1.57 g=0.79 g$

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4 years ago

Which gas is produced when we add a pinch of baking soda in vinegar

Luda [366]

When you add a pinch of baking soda into vinegar, carbon dioxide gas is produced

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3 years ago

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What Word means the gradual change and build up of organisms in an enviroment

Rom4ik [11]

T The word that means the gradual change and build up of organisms in an environment is evolution

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4 years ago

When snow melts does its volume decrease or increase?

kompoz [17]

The volume of the snow decreases. This had happened because the snow is made up or comprised of water (H2O) and oxygen (O). When the snow starts melting, the air inside the snow discharges into the atmosphere and the water turn out to be a puddle on the ground.

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4 years ago

Which of these measurements was made with the most precise measuring device: 8.1956m, 8.20m, or 8.196m?

tigry1 [53]

If I’m correct I believe it’s 8.1956m.

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3 years ago

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