CHEMISTRY HIGH SCHOOL

The mass of 69Ga is 68.7200 amu . The mass of 71Ga is 70.9200 amu .

Answers

Answer 1
Answer: I'm not sure if what this question is asking but ill be assuming that the average molecular mass is required. An assuming that the abundance of each isotope is 50% the average molecular mass is 69.82 amu. 

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What is the name of a neutral group of atoms that are held together by covalent bond (this word has 8 letters)

Answers

The word that you're looking for is either nonpolar or molecule. Both have 8 letters. A molecule is a group of atoms held together by covalent bonds, and nonpolar is used to describe a molecule in which the electrons are shared equally between the atoms. 

If two oxygen atoms combine to make a molecule, what type of bond will they form

Answers

They will form a diatomic molecule, bonded by covalent bond. 2 atoms of oxygen because it 1 atom cannot be stable as 2 together....
.... I hope it helps

Final answer:

Two oxygen atoms form a stable molecule by sharing two pairs of electrons, forming a double covalent bond. This is an important process for achieving the required octet electron configuration for both oxygen atoms.

Explanation:

When two oxygen atoms combine to form a molecule, the type of bond they form is a double covalent bond. An atom of oxygen has six electrons in its valence shell and it requires two more to achieve stability, hence, the oxygen atom achieves this equilibrium by sharing two pairs of electrons forming a double covalent bond. This is similar to the example of hydrogens and an oxygen atom sharing electrons to form a water molecule, where covalent bonds are also present.

The creation of a double bond occurs as these atoms share more than one pair of electrons to attain the required octet configuration. This could also be seen in bonds formed between carbon and oxygen atoms in formaldehyde (CH₂O), or between carbon atoms in ethene (C₂H4).

The covalent bond formed between these two oxygen atoms is, therefore, a key component for them to form a stable molecule.

Learn more about Double Covalent Bond here:

brainly.com/question/19382448

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The_____is an organelle that can give instructions for a
cell to reproduce and send directions to organelles to make needed
materials.

Answers

Answer:

nnmnm

Explanation:

If it takes 54 mL of 0.1 M NaOH to neutralize 125 mL of an HCl solution,what is the concentration of the HCl ?

Answers

volume of NaOH = 54 mL / 1000 = 0.054 L

Molarity NaOH = 0.1 M

Number of moles NaOH :

n = M * v

n = 0.1 * 0.054

n = 0.0054 moles of NaOH

Finally we calculate the number of moles of HCl in the solution from the stoichiometry of the reaction :

HCl + NaOH = NaCl + H₂O

1 mole HCl -------- 1 mole NaOH
? moles HCl ------- 0.0054 moles  NaOH

moles HCl = 0.0054 * 1 /1

= 0.0054 moles of HCl

Volume of HCl = 125 mL / 1000 = 0.125 L

M ( HCl ) = n / V

M = 0.0054 / 0.125

 = 0.0432 M

hope this helps!

Knowing the chemical properties of a substance will tell you how the substancea. looks.
c. can be broken down into atoms.
b. smells.
d. reacts with other substances.

Answers

Whereas physical properties of a substance tells us about how the substance looks, smells, etc, the chemical properties of a substance basically tells us how the substance will react with other substances. Therefore, knowing the chemical property of a substance tells us how the substance reacts with others.Hope this helps. Let me know if you need additional help!
d. reacts with other substances.

A container is filled with 4.0 g H2 and 5.0 02. How much water is produced

Answers

4.0 g water. Water is the limiting reactant. Therefore there will be excess oxygen.
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