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2 years ago

How many grams of copper

Chemistry

1 answer:

iren [92.7K]2 years ago

7 0

The mas of copper is 217.3 grams.

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Why steam distillation is usefull for thermally un stable compounds

g100num [7]

The advantage of steam distillation over simple distillation is that the lower boiling point reduces decomposition of temperature -sensitive compounds.

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4 years ago

Define/Differentiate between a physical property and a chemical property?

irga5000 [103]

Answer:

A physical property is an aspect of matter that can be observed or measured without changing it. A chemical property may only be observed by changing the chemical identity of a substance.

Explanation:

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4 0

4 years ago

How many liters of 0.1107 M KCI contain 15.00 g of KCI (FW 74.6 g/mol)? O0.02227 L O 0.5502 L 01661 L O 1.816 L 18.16 L

Greeley [361]

Answer:

1,816 L

Explanation:

Molar concentration or molarity is a way to express the concentration of a chemical in terms of moles of substances per liter of solution.

To obtain the liters of this solution you must convert moles/L to g/L with formula weight (FW), thus:

0,1107 mol of KCl / L × (74,6 g / mol) = 8,258 g of KCl / L.

It means that in one liter you have 8,258 g of KCl. Thus, 15,00 g of KCl are contained in:

15,00 g × (1 L / 8,258 g) = 1,816 L

I hope it helps!

3 0

3 years ago

at what temperature will a fixed amount of gas with a volume of 175 L at 15 degrees celsius and 760mmHg occupy a volume of 198L

Jlenok [28]

Answer: The temperature when the volume and pressure has changed is 274 K

Explanation:

To calculate the pressure when temperature and volume has changed, we use the equation given by combined gas law. The equation follows:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1,V_1\text{ and }T_1$ are the initial pressure, volume and temperature of the gas

$P_2,V_2\text{ and }T_2$ are the final pressure, volume and temperature of the gas

We are given:

$P_1=760mmHg\\V_1=175L\\T_1=15^oC=[15+273]K=288K\\P_2=640mmHg\\V_2=198L\\T_2=?K$

Putting values in above equation, we get:

$\frac{760mmHg\times 175L}{288K}=\frac{640mmHg\times 198L}{T_2}\\\\T_2=274K$

Hence, the temperature when the volume and pressure has changed is 274 K

8 0

3 years ago

Read 2 more answers

Which of the following is acidic when dissolved in water? a. SO b. NO2 c. Na, d. Cao e. Two of these modern periodic table are a

Zielflug [23.3K]

Answer: e. Two of these

Explanation:

(a) $SO_2$

When $SO_2$ is dissolved in water. It reacts to form sulfurous acid. The chemical reaction is shown below:

$SO_2+H_2O\rightarrow H2SO_3$

Therefore, $SO_2$ is acidic when dissolved in water.

(b) $NO_2$

When $NO_2$ is dissolved in water. It reacts to form nitric acid. The chemical reaction is shown below:

$3NO_2+H_2O\rightarrow 2HNO_3+NO$

Therefore, $NO_2$ is acidic when dissolved in water.

Sodium is a metal. It gives sodium hydroxide on reaction with water. The chemical reaction is as follows:

$
Na+H_2O\rightarrow NaOH
+H_2$

Therefore, Na is basic when dissolved in water.

(d) $CaO
$

Calcium oxide is a metallic salt. It gives calcium hydroxide on reaction with water. The chemical reaction is as follows:

$CaO+H_2O\rightarrow Ca(OH)_2$ ,

Therefore, $CaO
$ is basic when dissolved in water.

(e) Two of these.

Since both $SO_2$ and $NO_2$ give acids when dissolved in water, both are acidic.

4 0

3 years ago