3 years ago

What do you think a chemical change is?

Chemistry

1 answer:

Rudiy273 years ago

6 0

Answer:

a chemical change is when the substance turns into a new substance and can not be changed back into its original form

Explanation:

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Is the chemical reaction between magnesium metal and hydrochloric acid solution an acid base reaction?

Anika [276]

Answer:

Explanation:

The chemical reaction between magnesium metal and hydrochloric acid solution is not an acid - base reaction.

An acid - base reaction involves an acid and base to produce salt and water.

This reaction is called a neutralization reaction.
An acid is a substance that produces excess hydroxonium ions in solutions.
A base produces excess hydroxyl ions in solution.
When acids and base combines, the main product is a salt in water solution.

3 0

3 years ago

How can you tell if a compound is an acid or base?

garri49 [273]

By there pH . a pH below 7 is acidic . Above 7 is basic. If it’s right at 7 it’s neutral.

6 0

2 years ago

The mass of an electron is about 9.11 × 10 -9 kg., write this whole number

Pepsi [2]

Answer:0.00000009

Explanation:

9.11 × （1/1000000000）=0.00000009

8 0

3 years ago

Charles’ Law can be expressed mathematically as V=kT. If the constant k for 6.0 L of gas is 0.020 L/K (liters per kelvin), what

kozerog [31]

Answer: 300 K

Explanation:

Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

$V\propto T$ (At constant pressure and number of moles)

$V=kT$

Given : V= 6.0 L

k= 0.020 L/K

T=?

$6.0=0.020LK^{-1}\times T$

$T=300 K$

Thus temperature of the gas is 300 K.

3 0

3 years ago

What are two ways in which white blood cells fight pathgons that have entered the body

crimeas [40]

Answer:

Answer c i believe

Explanation:

3 0

3 years ago