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3 years ago

When a chemical reaction occurs with only one substance, what happens to the atoms of that substance?

2 answers:

7 0

Answer:when a chemical reaction occurs with only one substance, the atoms of that substance rearranges to form new bonds to make the products.

Explanation: During chemical reaction, the bonds between the reactants are broken and the atom bonds in new ways to form products that are chemically and physically different from the reactants.

Example is the breakdown reaction of hydrogen peroxide(the reactant) into water and oxygen( products). Here, 2 molecules of hydrogen peroxide is broken down to form 2 molecules of water and one molecule of oxygen. The atoms that started out in the hydrogen peroxide molecules are rearranged to form water molecules and oxygen molecules.

miskamm [114]3 years ago

6 0

Answer:

The atoms of the substance are rearranged

Explanation:

When a chemical reaction involves only one substance, the atoms of the reactant substance rearranges to yield the product substance(s).

Chemical bonds in the reactant substance are broken and new bonds are formed as the atoms in the reactant substance forms the product substance (s).

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21 kg brick v=6.1 m/s sticks to a 2.9 kg cart v=.26 m/s

vovikov84 [41]

Answer:

v = 6.05 m/s

Explanation:

The mass of the brick, M = 21 kg

The velocity of the brick, U = 6.1 m/s

The mass of the cart, m = 2.9 kg

The velocity of the cart, u = 0.26 m/s

The combined mass of the brick and the cart, v = ?

According to the law of conservation of linear momentum,

Combined final momentum = sum of the initial momentum

(M + m)v = MU + mu

v = MU + mu / M + m

= 21 x 6.1 + 2.1 x 0.26 / (21 + 0.26)

= 6.05 m/s

Hence, the combined velocity of the cart and the brick is, v = 6.05 m/s

5 0

3 years ago

What does inertia mean?

Georgia [21]

a tendency of a body to do nothing or to remain unchanged.

6 0

3 years ago

Read 2 more answers

A white blood cell has a diameter of approximately 12 micrometers or 0.012 um a model represents its diameter as 24 um what rati

ohaa [14]

Answer:

The ratio of the model size is 1 : 2000

Explanation:

Given

Real Diameter = 0.012 um

Scale Diameter = 24 um

Required

Determine the scale ratio

The scale ratio is calculated as follows;

$Scale = \frac{Real\ Measurement}{Scale\ Measurement}$

Substitute values for real and scale measurements

$Scale = \frac{0.012\ um}{24\ um}$

Divide the numerator and the denominator by 0012um

$Scale = \frac{1}{2000}$

Represent as ratio

$Scale = 1 : 2000$

<em>Hence, the ratio of the model size is 1 : 2000</em>

3 0

3 years ago

Explain the causes of atmospheric pressure and why it changes with altitude?

Verdich [7]

Answer:

As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude

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2 years ago

An object is attached to a vertical spring and bobs up and down between points A and B. Where is the object located when its kin

gtnhenbr [62]

Answer:

a. at either A or B

Explanation:

Kinetic energy may be defined as the energy of the system or an object which is due to its velocity of the object it possess.

In the context, an object having mass is attached to spring which is vertical and the object moves up and down due to spring effect between points A and B. Now these points A and B are the extreme points after which the object bounces back.

At point A and B, the velocity of the object becomes zero and hence the kinetic energy of a body varies directly proportional to its velocity.

i.e. Kinetic energy $= \frac{1}{2} \text{mass} \times (\text{ velocity})^2$

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3 years ago