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serious [3.7K]
3 years ago
5

Salt dissolving in water is a physical change. (2 points) True False

Chemistry
1 answer:
nydimaria [60]3 years ago
5 0

Answer:

i believe its true

Explanation:

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When solving an equation using Gay-Lussac's law, which of the following steps do not apply? A. List your knowns and unknowns. B.
suter [353]

Answer:

C. Plug the unknowns into the ideal gas law formula.

Explanation:

Gay-Lussac's law states that:

"For a constant mass of an ideal gas kept at constant volume, the pressure of the gas is directly proportional to its absolute temperature"

Mathematically, it can be written as:

\frac{p_1}{T_1}=\frac{p_2}{T_2}

where

p1 is the initial pressure

T1 is the initial temperature (in Kelvin)

p2 is the final pressure

T2 is the final temperature (in Kelvin)

Therefore, in order to solve for one of the 4 variables, the following steps must be adopted:

A. List your knowns and unknowns.

B. Convert temperature to kelvin.

D. Solve for the unknown.

While the following step is not needed:

C. Plug the unknowns into the ideal gas law formula.

Because we do not need to use the ideal gas law formula.

8 0
3 years ago
Which element contains the same number of energy levels as oxygen?
natima [27]

Answer: this question is 3 days ago? Omg

3 0
3 years ago
2.50 g CuCl2 equals how many moles
Vitek1552 [10]
The molar mass of CuCl2 is 134.45 g/mol; therefore, you divide 2.5 g of CuCl2 by 134.45 g of CuCl2 leaving you with 0.019 moles
4 0
3 years ago
Read 2 more answers
Urgent help will be much appreciated
Scorpion4ik [409]

Answer:

b c d a

Explanation:

hgsautaahhttdioirtrf

6 0
3 years ago
When 1mol of a gas burns at constant pressure, it produces 2430 j of heat and does 5 kj of work?
navik [9.2K]
Convert  2430j  to  Kj  that  is  divide  by  1000 
2430/1000=2.430
delta  E  =Q+W
q is  the  heat  done  
w is  the  work done and  since  is work  is  done is by  the  system therefore  it  is  negative
w  is  therefore -5kj
q=-2.430
delta E =-2.430 + -5= -7.43kj/mol

7 0
3 years ago
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