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Andrei [34K]
3 years ago
10

How can you increase an object's kinetic energy?

Chemistry
1 answer:
Nina [5.8K]3 years ago
6 0
If you double the mass of an object, you double the kinetic energy. If you double the speed of an object, the kinetic energy increases by four times.
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How many atoms are in 1.22 moles of magnesium?
WITCHER [35]

Answer:

7.34684 × 10^23 atoms

Explanation:

Well, one mole is basically

6.022 × 10^23 atoms. So 1.22 moles would be

6.022 × 10^23 ⋅ 1.22 atoms.

6.022 × 10^23 ⋅ 1.22 = 7.34684 × 10^23 atoms

7 0
3 years ago
Read 2 more answers
How many grams of sodium chloride, NaCl, result from the reaction shown in the following equation, FeCl3 + 3NaOH
LUCKY_DIMON [66]
<span>175.5g
</span>Cl(35.5) x 3 = 106.5
Na(23) x 3 = 69
106.5 + 69 = 175.5g

or

0g because sodium and chlorine are not chemically bonded.
7 0
4 years ago
Read 2 more answers
*Asap*
ira [324]

Answer:

(a).

order \: of \: A = 2 \\ order \: of \:B  = 0 \\ rate = k[A] {}^{2} [B]

(b)

0.32 \times  {10}^{ - 3}  = k {(0.12)}^{2} (0.15) \\ k = 0.148 \:  {mol}^{ - 2}  {dm}^{6}  {s}^{ - 1}

(c). The rate increases because kinetic energy of reactant molecules increases.

7 0
3 years ago
Zinc reacts with iodine in a synthesis reaction. Using a balanced chemical equation for the reaction, determine the percent yiel
Karolina [17]

81.9 % is the percent yield of reaction of zinc with iodine producing ZnI2.

Explanation:

Balanced chemical equation for the reaction:

Zn + I2 ⇒ ZnI2

Data given:

mass of sample zinc = 129 grams  

mass of ZnI2 formed = 510.6 grams (actual yield)

number of moles = \frac{mass}{atomic mass of one mole}

 number of moles of zinc = \frac{129}{65.38}

                                            = 1.97 moles

from stoichiometry

1 mole of Zn reacts to form 1 mole of ZnI2

1.97 moles of Zn will form 1.97 moles of ZnI2

atomic mass of ZnI2 = 319.22 grams/mole

mass of ZnI2 formed = 628.86 grams (theoretical yield)

% yield = \frac{actual yield}{theoretical yield} x100     equation 1

from the reaction,

Putting the values in equation 1

% yield = \frac{510.6}{628.86}  x 100

             =  81.19 % is the % yield.

6 0
3 years ago
What are the purposes of a chemical equation? Check all that apply.
Jlenok [28]

Answer:

to show how substances in a chemical reaction interact

to shorten the explanation of a chemical reaction

to help keep track of atoms in a chemical reaction

Explanation:

5 0
3 years ago
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