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3 years ago

The struggle for existence against other members of an organisms species is

Chemistry

2 answers:

fomenos3 years ago

5 0

It is a natural selection

n200080 [17]3 years ago

4 0

It is Natural selection

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Sulfur has 16 electrons. When it combines with magnesium. It acquires A -2 charge. How many electrons does it have now?

Rainbow [258]

18 electrons. With a -2 charge, that means it gains two electrons.

8 0

3 years ago

Calculate the number of formula units in 2.50 mol NaNO

marta [7]

The number of formula units in 2.50 mol of the compound is 15.1 * 10^23.

The question is unclear whether NaNO2 or NaNO3 is implied. However,in either case, the solution applies equally.

6.02 * 10^23 formula units of the compound are contained in 1 mole

x formula units are contained in 2.5 moles of the compound

x = 6.02 * 10^23 formula units * 2.5 moles/ 1 mole

x = 15.1 * 10^23 formula units of the compound.

Learn more; brainly.com/question/9743981

3 0

3 years ago

What is the electrical charge of an atom that has gained an electron

BARSIC [14]

An electron has a ( - ) charge and so if an atom gains one electron it gains a - charge

hope that helps

6 0

3 years ago

Balance the following equation in acidic conditions. Phases are optional.

NISA [10]

I think the reaction involved here is a redox reaction in acidic conditions. To balance this type of reaction, we do as follows:

Balance the O atoms in each side by adding H2O on either side.
Balance H atoms in each side by adding H+.
Balance the charges by adding electrons.

Hope this helps.

4 0

4 years ago

Please fill out completely for my understanding. Thank-You!

Archy [21]

The atomic number,atomic mass,valence electrons and the formula for calculating the number of neutrons is also given.The following table has been completed below in the attachment.

Explanation:

Atomic Number:the number of protons /electrons present in the nucleus of an atom is called the atomic number.

Mass Number/Atomic Mass:the number of protons and neutrons present in a nucleus

Example: $C_{6} ^{12}$ ;here;6 implies the atomic number and 12 implies the mass number/atomic mass

No.of neutrons=Mass number-Number of protons

Valence electrons:the number of electrons present in the outer most shell of an atom are called valence electrons

Example:If we consider a carbon atom;as its electronic configuration is2,4 and it belongs to 4th group.Therefore the number of valency electrons in carbon is 4.

8 0

3 years ago