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Digiron [165]
3 years ago
13

A boy weighing 25 kg sits in a 1000 kg car at a speed of 15 m/s. What is the total momentum of the car and the boy?

Chemistry
1 answer:
dexar [7]3 years ago
7 0

Answer:

D) 15375kgm/s

Explanation:

weight of the boy 25kg +weight of the car 1000kg= 1025kg so momentum =mass × velocity. so it's SI unit is = kg×m/s = kg m/s.

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A beaker filled with freshwater has a p h balance of 6.65. geraldo wants to model the effect of acids on the ph of water for a g
kvv77 [185]

Geraldo can add a pollutant with slightly basic nature so he will have a solution of neutral pH of 7.

<h3>What is pH?</h3>

The pH of a solution is the negative logarithm to base ten of the hydrogen ions concentration of the solution.

The pH of 6.5 means that the solution is acidic.

By adding a pollutant which is slightly basic in nature, Geraldo will have a solution of neutral pH which is a pH of 7.

Learn more about pH at: brainly.com/question/24595796

4 0
2 years ago
A chemist determines by measurements that 0.0200 moles of chlorine gas participate in a chemical reaction. Calculate the mass of
Schach [20]

Answer:

1.4200 g

Explanation:

The chlorine gas has a molecular formula Cl2. In table periodic, the molar mass of one atom of chlorine is 35.5 g/mol, so the molar mass of Cl2 is 71 g/mol.

Molar mass, mass and number of moles are related by the equation below:

n = \frac{m}{MM}

Where n is the number of moles, m is the mass, and MM is the molar mass of the compound.

So, for 0.0200 moles of Cl2 produced:

0.0200 = \frac{m}{71}

m = 71x0.0200

m = 1.4200

8 0
4 years ago
When chemists write out reactions, they often place numbers to the left of a chemical formula.
guajiro [1.7K]

 The  number  to the   left   of  a chemical  formula is  called   coefficients


 Explanation

Coefficient  is  the  number in  front  of a chemical  formula.

It tell  how many  molecules  of a given formula that are  involved  in a chemical  reaction.

in   2H+O→  H2O  the coefficient  are  2,1,1

that is, 2  in front  of H2

            1 in front of O

               1 in  front of H2O


5 0
3 years ago
Read 2 more answers
Is 2h2 + o2 2h2o a balanced chemical equation?is it obeying the law of conservation of matter
kirza4 [7]

Yes, this is a balanced chemical equation, and it obeys the Law of Conservation of Mass.

A balanced chemical equation obeys the Law of Conservation of Mass if there are the <em>same numbers of each type of atom on each side of the reaction arro</em>w.

2H₂ + O₂ ⟶ 2H₂O

Let’s check the numbers.

<u>Atom</u> <u>On the left</u> <u>On the right</u><u> </u>

  H             4                 4

  O             2                 2

We have the same numbers of H and O atoms on each side of the reaction arrow.

The equation is<em> </em>balanced and it obeys the Law of Conservation of Mass.

5 0
3 years ago
PLEASE HELP DUE TOMORROW TY IF YOU DO HELP!
11Alexandr11 [23.1K]

Answer:

Carbon atoms:2

Hydrogen: 2

oxygen: 3

Explanation:

This is what I got for the first part

7 0
3 years ago
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