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lutik1710 [3]
3 years ago
12

Name and define the quantity represented by H​

Chemistry
1 answer:
Evgesh-ka [11]3 years ago
4 0

Answer:

Molar enthalpy change, the enthalpy change for one mole of a pure substance

Explanation: i think

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What does "Здражейте, какво пражите?" mean?
Vera_Pavlovna [14]

Answer:

it mean "

Hello, what are you roasting"

Explanation:

3 0
4 years ago
You have been working to develop a new fictitious compound in the lab. Determine the amount in units of moles​ [mol] of 40 grams
Serhud [2]

Answer : The moles of given compound is, 0.064 mole

Explanation : Given,

Mass of given compound = 40 g

Atomic mass of X = 50 amu

Atomic mass of Y = 45 amu

Atomic mass of Z = 10 amu

First we have to calculate the molar mass of given compound.

The given compound formula is, X_5Y_7Z_6

Molar mass of X_5Y_7Z_6 = (5 × Atomic mass of X) + (7 × Atomic mass of Y) + (6 × Atomic mass of Z)

Molar mass of X_5Y_7Z_6 = (5 × 50) + (7 × 45) + (6 × 10) = 625 g/mol

Now we have to calculate the moles of given compound.

\text{Moles of given compound}=\frac{\text{Mass of given compound}}{\text{Molar mass of given compound}}

\text{Moles of given compound}=\frac{40g}{625g/mol}

\text{Moles of given compound}=0.064mol

Thus, the moles of given compound is, 0.064 mole

6 0
4 years ago
Important: How much energy would be required to vaporize 45.0 grams of water?
r-ruslan [8.4K]

Explanation:

The answer is 116 kJ . c - water's specific heat - 4.184 J/g⋅∘C . Then, you must provide enough heat to get all the water from liquid to steam.

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Question 33 Saved
Tatiana [17]

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The third option

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If people have found more volcanic rock layers in the past that would mean that volcanic activity was more common in the past.

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The periodic table displays
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OA. all the known elements that exist in the world today.

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