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2 years ago

Which of the following is a synthesis reaction?

Chemistry

1 answer:

Llana [10]2 years ago

3 0

Explanation:

In BaO + CO2 => BaCO3, two different molecules are being recated to form a different compound.

This is called a synthesis reaction.

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A sample of Freon-12 (CF2Cl2) occupies 2.842 x 101 L at 331 K and 2.525 x 102 kPa. Find its volume (in L) at standard temperatur

Angelina_Jolie [31]

We have to first find the number of moles of Freon-12 in the sample using the ideal gas law equation
PV = nRT
n = $\frac{PV}{RT}$
since the number of moles at both conditions given and at stp we can write the following formula
$\frac{P1V1}{RT1} = \frac{P2V2}{RT2}$
where parameters for the given conditions are on the left side and parameters for STP conditions are on the right side of the equation
where P1 - pressure - 252.5 kPa
V1 - volume - 28.42 x 10⁻³ m³
R - universal gas constant
T1 - 331 K

STP conditions
P2 - 101 325 Pa
T2 - 273 K

substituting these values in the equation

$\frac{252 500Pa*28.42*10 ^{-3}m^{3} }{R*331K} = \frac{101325 Pa*V}{R*273 K}$

V = 58.41 L
Volume at STP is 58.41 L

3 0

2 years ago

Calculate the average atomic mass of chromium. It's composition is: 83.79% with a mass of 51.94 Amy; 9.50% with a mass of 52.94

Lana71 [14]

Youve gotta multiply the percentages by the masses. Like here
(.8379)(51.94)

8 0

3 years ago

What volume of 0.25 M HCl would be needed to neutralize 45 mL of 0.12 M solution of Mg(OH)₂

dalvyx [7]

Answer:

0.38dm³

Explanation:

you just du-mb cuh

I'm jp ig

4 0

2 years ago

To learn more about the genetic material of plant and animal cells, where would a person look?

Agata [3.3K]

The person would look B) in the nucleus.

Hope this helps!

-Payshence xoxo

6 0

3 years ago

4. Identify each substance in the following word equation as a reactant or a product

dolphi86 [110]

Explanation:

4. limestone heat lime + carbon dioxide

The reactants in this expression above is limestone

The products of the reaction is carbon dioxide and lime

Reactant is the species that gives the product and it is usually found on the left hand side of the expression.

The product is the substance on the right hand side of the expression that forms through the experiment.

Heat is used to facilitate the reaction.

5. An exothermic reaction is a reaction in which heat is given off.

An endothermic reaction is a reaction in which heat is absorbed in the process.

An exothermic reaction is always warmer after the reaction whereas an endothermic reaction is colder at the end of the reaction.

6. Sodium salicylate is made from carbon dioxide and sodium phenoxide.

The reactants are:

Carbon dioxide and sodium phenoxide

The product is:

Sodium salicylate

8 0

3 years ago