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2 years ago

If a 50kg water rocket takes off with a force of 250 newtons, what is its acceleration?

Chemistry

2 answers:

Delicious77 [7]2 years ago

6 0

Answer:

50 m/s^2

Explanation:

In this case, we're using Newton's Second Law: Force = mass × acceleration.

We are given the force as 250 newtons and the mass as 50 kg, so 250/50 = 50 m/s^2.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

lilavasa [31]2 years ago

4 0

Answer: The acceleration is 50.

Explanation: You can actually re-arrange the formula F = ma to F/m = a. 250/50 = 50.

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What is the molarity (M) of the following solutions?

Dennis_Churaev [7]

Answer:

The molarity (M) of the following solutions are :

A. M = 0.88 M

B. M = 0.76 M

Explanation:

A. Molarity (M) of 19.2 g of Al(OH)3 dissolved in water to make 280 mL of solution.

Molar mass of Al(OH)3 = Mass of Al + 3(mass of O + mass of H)

= 27 + 3(16 + 1)

= 27 + 3(17) = 27 + 51

= 78 g/mole

$Al(OH)_3$ = 78 g/mole

Given mass= 19.2 g/mole

$Mole = \frac{Given\ mass}{Molar\ mass}$

$Mole = \frac{19.2}{78}$

Moles = 0.246

$Molarity = \frac{Moles\ of\ solute}{Volume\ of\ solution(L)}$

Volume = 280 mL = 0.280 L

$Molarity = \frac{0.246}{0.280)}$

Molarity = 0.879 M

Molarity = 0.88 M

B .The molarity (M) of a 2.6 L solution made with 235.9 g of KBr

Molar mass of KBr = 119 g/mole

Given mass = 235.9 g

$Mole = \frac{235.9}{119}$

Moles = 1.98

Volume = 2.6 L

$Molarity = \frac{Moles\ of\ solute}{Volume\ of\ solution(L)}$

$Molarity = \frac{1.98}{2.6)}$

Molarity = 0.762 M

Molarity = 0.76 M

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