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2 years ago

Question 12 of 32

Chemistry

1 answer:

slavikrds [6]2 years ago

5 0

C
Because I am right
God bless

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Agustina was standing on the edge of a cliff of unknown height holding a bowling ball. She wanted to find the height of the clif

nlexa [21]

Answer:

433 m

Explanation:

Since the fall represents motion under gravity, we use the equation

s = ut - 1/2gt² where s = height of cliff or distance bowling ball falls through, u = initial velocity of bowling ball = 0 m/s(since it starts from rest), t = time = 9.4 s and g = acceleration due to gravity = -9.8 m/s².

So, substituting the values of the variables into the equation, we have

s = 0 m/s × 9.4 s - 1/2 × 9.8 m/s² × (9.4 s)²

s = 0 m - 1/2 × -9.8 m/s² × 88.36 s²

s = 1/2(865.928 m)

s = 432.964

s ≅ 433 m

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2 years ago

What is nearly all of an atom's mass made up of?

mixas84 [53]

Protons and neutrons

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3 years ago

Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is

Gnesinka [82]

Potassium. Atomic radius gets larger as it goes to the left.

6 0

3 years ago

An iron ball and an aluminum ball of mass 100 g each are heated to the same temperature and then cooled to a temperature of 20°C

Katarina [22]

I guess A because it lost less heat

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3 years ago

Read 2 more answers

Sulfuric acid, H2SO4, can be neutralized by sodium hydroxide, NaOH. The unbalanced equation is:

kap26 [50]

Answer:

Sulfuric acid, H2SO4, can be neutralized by sodium hydroxide, NaOH.

Explanation:

The balanced chemical equation of the reaction is:

$H_2SO_4(aq)+2NaOH(aq)->Na_2SO_4(aq)+2H_2O(l)$

A student who was asked to balance the reaction wrote the following:

H2SO4(aq) + Na2OH(aq) →Na2SO4(aq) + H3O(l)

This is wrong equation.

Because, the formula of sodium hydroxide is NaOH only and it is not $Na_2OH$ .

Because the valency of sodium will not exceed one and hydroxide ion has valency is also one.

H2SO4(aq) + Na2OH(aq) →Na2SO4(aq) + H3O(l)

for this equation, the left side mass of reactants is:

161.0g

Right side mass of products is:

161.0 g

But H3O(l) will not exist and $H_3O^+(aq)$ will exist.

8 0

3 years ago