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Eduardwww [97]
3 years ago
8

True or False ? Endothermic reactions are characterized by net absorption of thermal energy from its surroundings which leads to

an increase in temperature of the surroundings ?
Chemistry
1 answer:
Artemon [7]3 years ago
3 0
False

 Signed by Virtuoso
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How many atoms are in 2.00 moles of Cu?
kondor19780726 [428]

Answer:6.02×1023 atoms.

3 0
3 years ago
Fred mixes a solution using two types of solutions: 0.60 liters containing 10% alcohol and 0.40 liters containing 35% alcohol. W
insens350 [35]

The alcohol concentration of the mixed solution is 20%

Simplification :

Based on the given condition, formulate :

35% ×0.40 + 0.6 ×10% ÷{ 0.4+0.6}

Calculate the product :\frac{0.14+0.06}{0.4 + 0.6}

Calculate the sum or difference : \frac{0.2}{1}

Any fraction with denominator 1 is equal to numerator : 0.2

Multiply a number to both numerator, denominator : 0.2 ×\frac{100}{100}

Calculate the product or quotient : \frac{20}{100}

A fraction with denominator equals to 100 to a percentage 20%.

How do you find the concentration of a mixed solution?

In general when your are mixing two different concentrations together first calculate number of moles for each solution (n=CV ,V-in liter) then add them together it will be total moles,then concentration of mixture will be = total moles / total volume(liter).

Learn more about concentration of alcohol :

brainly.com/question/13220698

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5 0
1 year ago
Which best explains how photosynthesis is helpful to humans? It reduces the amount of harmful rays released by the sun. It incre
masya89 [10]

Answer:I believe that the answer is c

Explanation: photosynthesis gives us oxygen to breath therefore it is helpful to humans

8 0
3 years ago
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After the hare population increased, what happened to the lynx population? Why?
Westkost [7]
The lynx population increased as well because hare are the prey and the lynx are the predators.
5 0
2 years ago
A reaction produces 0.801 moles of H2O. How many molecules of H20 are produced?
timama [110]

Answer:

1 mole of molecules = 6.022 × 10²³ molecules

1 = 6.022 × 10²³ molecules / mole

Multiplying a number with [6.022 × 10²³ molecules / mole] is like multiplying the number with 1 so  0.877 mole × 6.022 × 10²³ molecules / mole = 5.28 × 10²³ molecules

5.28 × 10²³ molecules of water is produced.

Explanation:

6 0
2 years ago
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