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Kamila [148]
4 years ago
8

All changes in state require energy to be added or taken away true or false

Chemistry
2 answers:
Lyrx [107]4 years ago
5 0

Answer:

True

Explanation:

All changes in phase of matter require the temperature of the substance to change

tiny-mole [99]4 years ago
3 0

Answer:

True

Explanation:

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Suppose that one of millikan's oil drops has a charge of −4.8×10−19
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The best and correct option is c

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What is the molarity of 5.60 mol of sodium carbonate in 1500 ml of solution?
FrozenT [24]

Answer:

3.74 M

Explanation:

We know that molarity is moles divided by liters. The first thing to do here is convert your 1500 mL of solution to L. There's 1,000 mL in 1 L, so you need to divide 1500 by 1000:

1500 ÷ 1000 = 1.50

Now you can plug your values into the equation for molarity:

5.60 mol ÷ 1.50 L = 3.74 M

7 0
3 years ago
The student observed a decrease in temperature when the substances were combined. A milky substance was produced and fell to the
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I've done this before, combine Calcium Chloride & Baking Soda and it produces a milky substance.

3 0
3 years ago
Barium-142 is used as a GI radiocontrast agent. After 1.25 hours, 9.25 μg remains in the patient. Determine the original dose gi
Trava [24]

Answer:

The answer to your question is the original dose of Ba-142 was 1184 μg

Explanation:

Data

Total time = 1.25 hours

The Final amount of Ba = 9.25 μg

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Process

1.- Convert total time to minutes

                      1 h ----------------- 60 min

                       1.25 h ------------ x

                        x = 75 min

2.- Draw a table of this process

                   Final amount of Ba               Time

                           9.25                                 75 min

                           18.5                                  64.4 min

                           37                                     53.8 min

                           74                                     43.2 min

                          148                                     32.6 min

                          296                                    22  min

                          592                                    11.4 min

                         1184                                      0.8 min        

4 0
4 years ago
What is the correct Lewis structure for group 5A element arsenic?
stellarik [79]
I believe the anwer is A
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4 years ago
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