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3 years ago

13

You put one ice cube on a room temperature rock and another ice cube on a room temperature piece of foil. Which ice cube will me

lt faster? Why?

1 answer:

aksik [14]3 years ago

5 0

Answer:

a ice cube on a room temperature rock

Explanation:

because the air temperature is warmer than the freezers which means the ice particle gather heat energy from warmer air.

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Passing an electric current through a sample of water (H2O) can cause the water to decompose into hydrogen gas (H2) and oxygen g

Tema [17]

<u>Answer:</u> The mass of water that must be reacted is 56.28 grams.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ....(1)

Given mass of oxygen = 50 g

Molar mass of oxygen = 32.00 g/mol

Putting values in equation 1, we get:

$\text{Moles of oxygen}=\frac{50g}{32g/mol}=1.5625mol$

For the given chemical equation:

$2H_2O\rightarrow 2H_2+O_2$

By Stoichiometry of the reaction:

1 mole of oxygen is produced when 2 moles of water is reacted.

So, 1.5625 moles of oxygen is produced when = $\frac{2}{1}\times 1.5625=3.125mol$ of water is reacted.

To calculate the mass of water, we use equation 1:

Moles of water = 3.125 moles

Molar mass of water = 18.01 g/mol

Putting values in equation 1, we get:

$3.125mol=\frac{\text{Mass of water}}{18.01g/mol}\\\\\text{Mass of water}=56.28g$

Hence, the mass of water that must be reacted is 56.28 grams.

3 0

4 years ago

What will happen if para starting movement do not occur or along the oesophagus

Ilya [14]

Answer:

....................

8 0

3 years ago

Can someone please help me

Mashutka [201]

Answer:

ok this is going to be a bit much but i will teach the basics. also this is an exothermic reaction

Explanation:

concentration H2 increases: it shifts to the right. this decreases O2 and increase H2O and K stays the same

concentration H2 decreases: it shifts to the left, it increases O2 and decreases H2O and K stays the same

concentration of O2 increases: it shifts to the right, this decreases H2 and increase H2O and K remains the same
concentration of O2 decreases: it shifts to the left. this increases H2 and decreases H2O and K stays the same

concentration of H2O increases: it shifts to the left, this increases H2 and O2

concentration of H2O decreases: it shifts to the right, this decreases H2 and O2

temp. increase: shifts left, increase H2 and O2, decreases H20 and K decreases

temp decrease: shifts right, decrease H2 and O2, increase H2O and K increases

pressure increase: shifts right, decrease H2 and O2, increase H2O and K remains the same

ps i hope this helps. and i hope it isn't to confusing.

Sincerely, Marie

6 0

4 years ago

Need help with answers 1-5?

yarga [219]

Do u know how to do phyrosus thearom?

3 0

3 years ago

A rectangular swimming pool has the dimensions of 26m long, 4m wide, and 2.5 m deep (high). The density of the water in the pool

finlep [7]

Answer:

$m=421.2g$

Explanation:

Hello.

In this case, we first compute the volume of the pool via:

$V=L*W*H\\\\V=26m*4m*2.5m\\\\V=260m^3$

Then, since the density is defined as the mass divided by the volume, we compute the mass as follows:

$\rho=\frac{m}{V}\\ \\m=\rho*V\\\\m=1.62g/m^3*260m^3\\\\m=421.2g$

Best regards.

7 0

3 years ago