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Mrrafil [7]
3 years ago
10

Adrian is measuring the time it takes to heat 200 mL of water until it boils. He is doing the experiment for the third time. He

predicts that it will take six minutes for the water to start to boil.
This is a good prediction if
A.
he heats twice as much water for the third test.

B.
recess begins in six minutes.

C.
it took nine minutes for his neighbor's water to boil.

D.
it took six minutes for the water to boil the first two times.
Chemistry
1 answer:
faltersainse [42]3 years ago
6 0

Answer:

I think a

explanation

..

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8. How much heat is released when 85.0 g of steam condense to liquid water?
sergeinik [125]

Answer:

199920J

Explanation:

Given parameters:

Mass of steam  = 85g

Unknown:

Heat released when the liquid is condensed  = ?

Solution:

The heat released by the substance is given as;

         H  = mL

H is the heat released

m is the mass

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3 years ago
What volume will 0.405 g of krypton gas occupy at STP?
Rufina [12.5K]

Answer:

The answer to your question is V = 0.108 L or 108 ml

Explanation:

Data

Volume = ?

mass = 0.405 g

Temperature = 273°K

Pressure = 1 atm

Process

1.- Convert mass of Kr to moles

                  83.8 g of Kr -------------------- 1 mol

                     0.405 g     -------------------  x

                     x = (0.405 x 1) / 83.8

                     x = 0.0048 moles

2.- Use the Ideal gas law to solve this problem

                   PV = nRT

- Solve for V

                      V = nRT / P

- Substitution

                      V = (0.0048)(0.082)(273) / 1

- Simplification

                       V = 0.108 / 1

- Result

                       V = 0.108 L

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