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ella [17]
3 years ago
9

All water is located in this layer

Chemistry
1 answer:
11111nata11111 [884]3 years ago
7 0
The troposphere because it is the closest to the earth
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How many moles of solute are in 300 mL of 1.5 M CaCl2? How many grams fo CaCl2 is this?
tester [92]

Answer:

1. 0.45 mole

2. 49.95g

Explanation:

The following were obtained from the question:

Volume of solution = 300mL = 300/1000 = 0.3L

Molarity = 1.5 M

Mole of CaCl2 =?

1. We can obtain the mole of the solute as follow:

Molarity = mole of solute /Volume of solution

1.5 = mole of solute/0.3

Mole of solute = 1.5 x 0.3

Mole of solute = 0.45 mole

2. The grams in 0.45 mole of CaCl2 can be obtained as follow:

Molar Mass of CaCl2 = 40 + (35.5 x 2) = 40 + 71 = 111g/mol

Mole of CaCl2 = 0.45 mole

Mass of CaCl2 =?

Mass = number of mole x molar Mass

Mass of CaCl2 = 0.45 x 111

Mass of CaCl2 = 49.95g

3 0
3 years ago
Read 2 more answers
Hannah does an experiment she has two colorless chemicals that she mixes together in a beaker which of the following indicates t
mrs_skeptik [129]

1.the chemical change color from colorless to purple

2. A yellow gas forms

3.a brown solid forms in the bottom of the beaker

4.the temperature of the chemicals rises 15 Celsius

Explanation:

All of the options are proofs that chemical change has occurred.

A chemical change is one with the following properties:

  • A new kind of matter is usually formed as seen by the gas evolution and the formation of the insoluble precipitate i.e brown solid at the bottom of the beaker.
  • They are not easily reversible.
  • Usually accompanied by energy changes as seen in the rise in temperature.
  • Color changes can also infer chemical changes in a reaction.

learn more:

Chemical change brainly.com/question/9388643

#learnwithBrainly

8 0
3 years ago
Which answer below correctly identifies the type of change and the explination for the boiling of water
katrin [286]
Answer:

Physical change because even though gas formation was observed, the water was undergoing a state change, which means that its original properties are preserved.

Explanation:

Water boiling results in the physical state changing from solid to gaseous water. This moment can be called boiling or vaporizing, which is the change from liquid to gaseous state by heating water. Thus, the "Boiling Point" (PE) of a substance is the temperature at which that substance changes from liquid to gaseous state and, in the case of water, is 100 ° C. When the water reaches this temperature its physical change occurs because, despite the formation of gas, the water was undergoing a state change, which means that its original properties are preserved.
7 0
3 years ago
Element for mercury symbols
Inessa [10]

Answer:

Mercury

Chemical element

Symbol: Hg

Explanation:

Please mark brainliest and have a great day!

5 0
3 years ago
Read 2 more answers
The carbon dioxide is released when limestone is heated during the<br> production of _____?
mezya [45]

Carbon dioxide is released when limestone is heated during the production of \sf\purple{cement}. ✔

\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Happy\:learning.}}}}}∘

4 0
4 years ago
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