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lys-0071 [83]
3 years ago
8

Can someone help me please

Chemistry
1 answer:
Romashka [77]3 years ago
8 0
True, False , and I think the last one is true
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Which statement best describes the law of conservation of mass? (1 point)
lisov135 [29]

Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.

<h3>What is law of conservation of mass?</h3>

The law of conservation of mass states that for any system closed Mass can neither be created not destroy. the mass of the system must remain constant over time,.

Therefore, Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.

Learn more about law of conservation of mass here.

brainly.com/question/15289631

6 0
2 years ago
Why are mole ratios important to stoichiometry calculations?
pishuonlain [190]
<span>Mole ratios are important to stoichiometric calculations because they bridge the gap when we have to convert between the mass of one substance and the mass of another.</span>
7 0
3 years ago
A silver nitrate (AgNO3) solution is 0.150 M. 100.0 mL of a diluted silver nitrate solution is prepared using 10.0 mL of the mor
zheka24 [161]

Answer: The molarity of silver nitrate in the diluted solution is 0.015 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

According to the dilution law,

M_1V_1=M_2V_2

where,

M_1 = molarity of concentrated solution = 0.150 M

V_1 = volume of concentrated solution = 10.0 ml

M_2 = molarity of diluted solution = ?

V_2 = volume of diluted solution = 100.0 ml

0.150\times 10.0=M_2\times 100.0

M_2=0.015M

Thus the molarity of silver nitrate in the diluted solution is 0.015 M

8 0
3 years ago
The vapor pressure of liquid acetone, CH3COCH3, is 100 mm Hg at 281 K. A 6.06E-2 g sample of liquid CH3COCH3 is placed in a clos
Lynna [10]

Explanation:

According to ideal gas equation, product of pressure and volume equals the product of number of moles, gas constant and temperature.

Mathematically,     PV = nRT

where          P = pressure,               V = volume

                  n = no. of moles,         R = gas constant = 0.0821 atm L/mol

                   T = temperature

Since, it is known that number of moles equal mass divided by molar mass.

Hence, number of moles of given sample of acetone are as follows.

              No. of moles = \frac{mass}{\text{molar mass of acetone}}

                                    =  \frac{6.06 \times 10^{-2}}{58 g/mol}

                                    = 0.104 \times 10^{-2} mole

Therefore, putting the values in ideal gas equation as follows.

                         PV = nRT

P \times 0.36 L = 0.104 \times 10^{-2} \times 0.082 atm L/mol \times 281 K

                           = 0.359 atm

In 1 atm equal to 760 mm Hg. So, convert 0.359 atm into mm Hg as follows.

                  0.359 atm \times \frac{760 mm Hg}{1 atm}

                       = 272.84 mm Hg

Hence, pressure of the ideal gas will be 100 mm Hg + 272.84 mm Hg = 372.84 mm Hg

Thus, we can conclude that the ideal gas pressure in the container if all of the liquid acetone evaporated is 372.84 mm Hg.

6 0
4 years ago
What is produced during all combustion reactions?
mario62 [17]
A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve \(\ce{O_2}\) as one reactant. The combustion of hydrogen gas produces water vapor. Notice that this reaction also qualifies as a combination reaction.



I looked this up but hope it helps
3 0
3 years ago
Read 2 more answers
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