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Stels [109]
2 years ago
10

Plz help! The best answer will get brainliest! What is the net force acting on an object?

Chemistry
2 answers:
yulyashka [42]2 years ago
7 0

Answer:The net force is the sum of all the forces that act upon an object.

Explanation:

Jet001 [13]2 years ago
3 0

Answer:

Gravity

Explanation:

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What happens when magnesium reacts with dilute acid?
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The magnesium dissolves to form magnesium chloride and hydrogen gas is released.

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3 years ago
Clouds are named for 3 different attributes including shape, _____________ & precipitation. *
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3 years ago
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Calculate the molecular weight of a substance. In which the solution of this substance in the water has a concentration of 7 per
Eduardwww [97]

Answer : The molecular weight of a substance is 157.3 g/mol

Explanation :

As we are given that 7 % by weight that means 7 grams of solute present in 100 grams of solution.

Mass of solute = 7 g

Mass of solution = 100 g

Mass of solvent = 100 - 7 = 93 g

Formula used :  

\Delta T_f=i\times K_f\times m\\\\T_f^o-T_f=k_f\times\frac{\text{Mass of substance(solute)}\times 1000}{\text{Molar mass of substance(solute)}\times \text{Mass of water(solvent)}}

where,

\Delta T_f = change in freezing point

T_f^o = temperature of pure water = 0^oC

T_f = temperature of solution = -0.89^oC

K_f = freezing point constant of water = 1.86^oC/m

m = molality

Now put all the given values in this formula, we get

(0-(-0.89))^oC=1.86^oC/m\times \frac{7g\times 1000}{\text{Molar mass of substance(solute)}\times 93g}

\text{Molar mass of substance(solute)}=157.3g/mol

Therefore, the molecular weight of a substance is 157.3 g/mol

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3 years ago
WHAT CAN YOU LEARN OR (LEARNING GOAL) ABOUT MITOSIS AND CELL CYCLE?
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At the end of mitosis, the new daughter cells contain the same number of chromosomes as the parent cell. Mitosis enables cellular growth and repair in multicellular organisms.

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3 years ago
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