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Kipish [7]
3 years ago
8

Which best describes a compound such as magnesium oxide

Chemistry
1 answer:
Mamont248 [21]3 years ago
7 0
A pure substance made up of different elements

hope this helped!!
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Explain the trend in boling point of alcohols in their homologous series​
faltersainse [42]

Explanation:

The boiling point of alcohols also increase as the length of hydrocarbon chain increases

4 0
3 years ago
HELPPPPPPP<br><br>DETERMINE THE CHARGE OF ELECTRON CLOUD OF POTASSIUM ​
tensa zangetsu [6.8K]

Answer:

+1

Explanation:

A Potassium atom is represented with the sign "K" in chemistry and have atomic number 19.

The charge of electrons causes a matter to experience a force and it can be positive or negative.

In Potassium atom, the electric charge is +1 to enter a stable electron configuration as there is only one valence electron in the outermost shell of potassium atom. As potassium atom will lose electron it will become positively charged.

Hence, the correct answer is "+1".

6 0
3 years ago
If an atom of thorium-234 were to undergo beta emission twice, which atom would result?
AnnZ [28]

Answer:

The answer to your question is  U-234

Explanation:

Data

Thorium-234

beta emission twice

Definition

Beta emission is when a beta particle (electron) is emitted from an atomic nucleus.

First beta emission

                                            ²³⁴₉₀Th   ⇒    ²³⁴₉₁Pa + e⁻

Second beta emission

                                            ²³⁴₉₁ Pa   ⇒  ²³⁴₉₂U  + e⁻

The atom will be Uranium-324

6 0
4 years ago
Read 2 more answers
What is the percent by mass of water in MgSO4 • 7H2O? A. 51.1% B. 195% C. 56.0% D. 21.0%
lbvjy [14]

Answer : The correct option is, (A) 51.1%

Explanation :

Mass percent : It is defined as the mass of the given component present in the total mass of the compound.

Formula used :

\text{Mass} \%H_2O=\frac{\text{Mass of }H_2O}{\text{Mass of }MgSO_4.7H_2O}\times 100

First we have to calculate the mass of H_2O and MgSO_4.7H_2O.

Mass of H_2O = 18 g/mole

Mass of 7H_2O = 7 × 18 g/mole = 126 g/mole

Mass of MgSO_4.7H_2O = 246.47 g/mole

Now put all the given values in the above formula, we get the mass percent of H_2O in MgSO_4.7H_2O.

\text{Mass} \%H_2O=\frac{126g/mole}{246.47g/mole}\times 100=51.1

Therefore, the mass percent of H_2O in MgSO_4.7H_2O is, 51.1%

6 0
3 years ago
Define natural resources
Sav [38]

Answer:

THOSE RESOURCES THAT ARE FOUND IN NATURE ARE CALLED NATURAL RESOUCES

3 0
3 years ago
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