3 years ago

Newsela what is a chemical reaction

1 answer:

kramer3 years ago

4 0

Answer:

A chemical reaction is a process in which the chemical bonds of a substance are broken or rearranged. One or more substances are formed with different properties because of this chemical reaction. Examples of chemical reactions are rust, combustion, and oxidation.

You might be interested in

Si la eficiencia de una máquina de calor es del 50% significa que ?

Karolina [17]

Answer:

No toques el link

Explanation:

8 0

3 years ago

A155-g sample of a unknown substance was heated from 25.0°C to 40.0°C.In the process, the substance absorbed 5696 J of energy. W

Iteru [2.4K]

The answer is: (5696 J) / (155 g) / (40.0 - 25.0)°C = 2.45 J/g·°C

3 0

4 years ago

Draw the structure of the alkyl bromide from which the alkyl acetate shown below was made by SN2 reaction.

valentinak56 [21]

Hi there nice to meet u thank you

4 0

3 years ago

A sample of a substance has a mass of 27.3 grams and a volume of 7.0 centimeters3. The density of this substance is

lora16 [44]

Answer:

The density of the substance is 3.9 grams per cubic centimeter.

Explanation:

Given mass=27.3 grams

volume=7 cubic centimeter

We need to find the density.

Density of a substance can be calculated by dividing mass of substance by volume of a substance

$Density\ =\ \frac{mass}{volume}$

$\\Therefore\ density\ =\ \frac{27.3}{7} \ =\ 3.9\ \frac{gm}{cm^3}$

Hence Density of the substance is $3.9gm/cm^3$ .

4 0

3 years ago

What kind of molecule is water? A. nonpolar B. ionic C. polar D. charged

kirill115 [55]

Answer:

The correct answer is c) polar

Explanation:

Water is a polar chemical compound, formed by the covalent bond between hydrogen and oxygen. There is an electronegative region on the part of the latter and an electropositive one on the part of hydrogen. Each molecule forms a Hydrogen Bridge junction with the oxygen atom of another nearby molecule.

7 0

4 years ago