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3 years ago

What is 22.0 +5.28+ 15.5

Chemistry

1 answer:

AveGali [126]3 years ago

6 0

Please post chem related qn only. The ans is 42.78

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Convert the following75 mL to L

Marizza181 [45]

Answer:

0.075 L

Explanation:

7 0

4 years ago

A constant-volume calorimeter was calibrated by carrying out a reaction known to release 3.50 kJ of heat in 0.200 L of solution

Dmitrij [34]

Answer:

The change in internal energy is - 1.19 kJ

Explanation:

Step 1: Data given

Heat released = 3.5 kJ

Volume calorimeter = 0.200 L

Heat release results in a 7.32 °C

Temperature rise for the next experiment = 2.49 °C

Step 2: Calculate Ccalorimeter

Qcal = ccal * ΔT ⇒ 3.50 kJ = Ccal *7.32 °C

Ccal = 3.50 kJ /7.32 °C = 0.478 kJ/°C

Step 3: Calculate energy released

Qcal = 0.478 kJ/°C *2.49 °C = 1.19 kJ

Step 4: Calculate change in internal energy

ΔU = Q + W W = 0 (no expansion)

Qreac = -Qcal = - 1.19 kJ

ΔU = - 1.19 kJ

The change in internal energy is - 1.19 kJ

4 0

4 years ago

How many moles of H2 are needed to react with 4.8 mol of O2 ?

VLD [36.1K]

Answer:

9.6 mol

Explanation:

Start by writing out the balanced equation of the reaction.

2 $H_{2}$ + $O_{2}$ ⇒ 2 $H_{2}O$

Here you will see 2 mol of hydrogen for every 1 mol of oxygen. Using this ratio, you can assume the amount of hydrogen will always be double that of oxygen. In this case, 4.8 * 2 = 9.6

5 0

2 years ago

Solve for it? show all work for me as well please ASAP!!

Katena32 [7]

Answer: The pressure will be 411 GH.

Explanation:

To calculate the final pressure of the system, we use the equation given by Gay Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant volume

Mathematically,

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$