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3 years ago

What is the kinetic energy of 3500 kg bus that is moving at 25 m/s

Chemistry

1 answer:

Bond [772]3 years ago

8 0

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

$k = \frac{1}{2} m {v}^{2} \\$

v is the velocity

m is the mass

From the question we have

$k = \frac{1}{2} \times 3500 \times {25}^{2} \\ = 1750 \times 625 \\ = 1093750 \: \: \: \: \:$

We have the final answer as

Hope this helps you

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Name 3 some sources of CO2

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3 years ago

Fe(NO3)2 not sure how to get the oxidation numbers of all elements

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The oxidation number of oxgyen is -2. In the compound, the total charge of oxygen is -12. Fe has a charge of +2. To make the sum equal to zero, N has to have a charge of +5. -12+2+2x=0; x= +5.

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2 years ago

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3 years ago

Read 2 more answers

Can somebody help with this please ?

erica [24]

Answer:

B. Molecules of different types of atoms that are not attracted to each other.

Explanation:

On a broad basis, matter can be subdivided into pure or distinct substances and impure substances (mixtures);

Pure substances are distinct substances having the following properties:

All parts are the same throughout
Composition is definite
They cannot easily be separated or broken down into simpler substances by physical means.
Separation by physical methods is not easy.
They have a unique set of physical properties.

From this criteria, we see that the second choice is nullified. This is because pure substances have their molecules attracted to each other.

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2 years ago

The combustion of ammonia produces NO and water.

Arte-miy333 [17]

Answer : The correct option is, (b) 10

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

The species present on the left side of the right arrow is the reactant and the species present on the right side of the right arrow is the product.

If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.

The coefficient tell us about that how many molecules or atoms present in the chemical equation.

The balanced chemical reaction will be,

$4NH_3+5O_2\rightarrow 4NO+6H_2O$

This reaction is a balanced chemical reaction because in this reaction number of atoms of individual elements present on reactant side are equal to the product side.

In this reaction, $NH_3\text{ and }O_2$ are the reactants and $NO\text{ and }H_2O$ are the products.

The sum of the coefficients for the products = 4 + 6 = 10

Hence, the correct option is, (b) 10

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3 years ago