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3 years ago

Is salt a compound or mixture?

Chemistry

2 answers:

-BARSIC- [3]3 years ago

6 0

Salt, also known as halite, is an ionic compound made up of sodium and chlorine atoms.

Anna11 [10]3 years ago

5 0

Table salt is an ionic compound :)

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2 moles of a gas have a pressure of 2 atm at a temperature of 300 K. What is the volume of the gas?

qwelly [4]

No of moles=2mol=n
Pressure=2atm=P
Temperature=300K=T
Volume=V

$\\ \tt\hookrightarrow PV=nRT$

$\\ \tt\hookrightarrow V=\dfrac{nRT}{P}$

$\\ \tt\hookrightarrow V=\dfrac{2(8.314)(300)}{2}$

$\\ \tt\hookrightarrow V=8.314(300)$

$\\ \tt\hookrightarrow V=2494.2mL$

$\\ \tt\hookrightarrow V=24.94dm^3$

4 0

2 years ago

0.39 moles of a gas fill a 5.0 l container that connects to a balloon through a closed valve. if the valve is opened an pressure

harina [27]

Answer: 5.39

Explanation: you are adding the balloon's volume and the container's volume

8 0

3 years ago

Is the formation of acid rain an exothermic or endothermic reaction?

Monica [59]

It is an exothermic reaction

4 0

3 years ago

How many grams of H2SO4 are needed to prepare 500. mL of a .250M solution?

zavuch27 [327]

Answer:

We need 12.26 grams H2SO4

Explanation:

Step 1: Data given

Volume of a H2SO4 solution = 500 mL = 0.500 L

Concentration of the H2SO4 solution = 0.250 M

Molar mass of H2SO4 = 98.08 g/mol

Step 2: Calculate moles H2SO4

Moles H2SO4 = concentration * volume

Moles H2SO4 = 0.250 M * 0.500 L

Moles H2SO4 = 0.125 moles

Step 3: Calculate mass of H2SO4

Mass of H2SO4 = moles * molar mass

Mass of H2SO4 = 0.125 moles * 98.08 g/mol

Mass of H2SO4 = 12.26 grams

We need 12.26 grams H2SO4

7 0

3 years ago

Which of the following best describes an example of applied chemistry?

hram777 [196]

Answer:

Explanation:

Examples of applied chemistry include creation of the variety of laundry detergents on the market and development of oil refineries.

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3 years ago