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3 years ago

What is the surface area of the triangular prism? 60ft 72ft 82ft 84ft

Chemistry

1 answer:

ch4aika [34]3 years ago

3 0

Answer: I’m pretty sure it’s 60

Explanation:

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If a car travels 400 meters in 20 sec how fast is it going

pochemuha

Answer:

400 meters every 20 seconds

Explanation:

7 0

4 years ago

Read 2 more answers

Using the data below, calculate the enthalpy for the combustion of C to CO

Leona [35]

Answer:

ΔH3 = -110.5 kJ.

Explanation:

Hello!

In this case, by using the Hess Law, we can manipulate the given equation to obtain the combustion of C to CO as shown below:

C(s) + 1/2O2(g) --> CO(g)

Thus, by letting the first reaction to be unchanged:

C(s) + O2(g)--> CO2 (g) ; ΔH1 = -393.5 kJ

And the second one inverted:

CO2(g) --> CO(g) + 1/2O2(g) ; ΔH2= 283.0kJ

If we add them, we obtain:

C(s) + O2(g) + CO2(g) --> CO(g) + CO2 (g) + 1/2O2(g)

Whereas CO2 can be cancelled out and O2 subtracted:

C(s) + 1/2O2(g) --> CO(g)

Therefore, the required enthalpy of reaction is:

ΔH3 = -393.5 kJ + 283.0kJ

ΔH3 = -110.5 kJ

Best regards!

6 0

3 years ago

Name 3 things that would be considered a compound.

Afina-wow [57]

Answer:

carbon dioxide, salt, copper

8 0

3 years ago

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What is the mole of 125 mg of Na? How many Na atoms?

Crank

(125 mg Na) x (1 g/1000mg) x (1 mol of Na/22.99 g) = 5.43 E -3 mols of Na

5.43 E -3 mols x 6.022 E 23 = 3.27 E 21 Na atoms

7 0

3 years ago

A potato gun beautifully illustrates Law. As you decrease the volume of the air in between two pieces of potato, the

kati45 [8]

<u>Answer:</u> The law that illustrates this is Boyle's Law

<u>Explanation:</u>

Boyle's law: This law states that pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

Mathematically,

$P\propto \frac{1}{V}$ (at constant temperature and number of moles)

Charles' law: This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure and number of moles.

Mathematically,

$V\propto T$ (at constant pressure and number of moles)

Avogadro's law: This law states that volume of the gas is directly proportional to the number of moles of the gas at constant pressure and temperature.

Mathematically,

$V\propto n$ (at constant pressure and temperature)

So, when the volume of the air in the gun decreases, the pressure is increased. The inverse relationship between the volume and pressure of the gas is very well illustrated by Boyle's Law.

Hence, the law that illustrates this is Boyle's Law

8 0

4 years ago