CHEMISTRY HIGH SCHOOL

What is the molarity of a 0.30 liter solution containing 0.50 mo les of NaCI

Answers

Answer 1
Answer: Number of moles NaCl = 0.50

Volume = 0.30 L

M = n / V

M = 0.50 / 0.30

= 1.667 M

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A solution contains 0.400 g of naoh in 20.0 ml of solution. what is its molarity?

Answers

Molar mass NaOH = 40.0 g/mol

number of moles : 0.400 / 40.0 = 0.01 moles

20.0 mL in liters = 20.0 / 1000 = 0.02 L

M = n / V

M = 0.01 / 0.02

= 0.5 M

What is the mass of 1 mole of Na3,PO4?

Answers

Answer:

163.940671 grams

Explanation:

You can view more details on each measurement unit: molecular weight of Na3PO4 or grams This compound is also known as Trisodium Phosphate. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Na3PO4, or 163.940671 grams.

How are regional climate patterns caused by atmospheric and ocean flows

Answers

Answer:

Ocean currents act as conveyer belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate. .

Chemists use activity series to determine whether which type of reaction will occur?

Answers

Answer:

The correct answer is "single replacement".

Explanation:

The activity series is a representation of a series of metals that are organized according to their order of reactivity. They start from the highest order of reactivity to the lowest order of reactivity.

The purpose of the series is to determine which products are formed in single-displacement reactions. The higher-order metals replace the lower order metals if there are two of them in the same solution. If metal is higher in the series it is more reactive than a metal that is below it in the activity series.

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What is a chemical change

Answers

A chemical change Is any change that results in the formation of new chemical substances .


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The energy needed to get a reaction started is thea. enzyme energy.
b. activation energy.
c. catalyst energy.
d. chemical energy.

Answers

Activation energy is the energy needed to start a chemical reaction. The correct answer to the given question is option   b. activation energy.

The energy needed to get a reaction started is called the activation energy. It is the minimum amount of energy required for a chemical reaction to occur. Activation energy is needed to break the existing bonds in reactant molecules and form new bonds to produce product molecules.

The correct answer to the given question is option   b. activation energy.

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The energy needed to get a reaction started is the activation energy. 

A catalyst speeds up a reaction, as well as an enzyme, and chemical energy is just a form of energy. 

Answer: Activation energy 
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