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Archy [21]
3 years ago
9

According to the law of conservation of matter, the number of ________ is not changed by a chemical reaction.

Chemistry
2 answers:
shutvik [7]3 years ago
5 0

According to the law of conservation of matter, the number of atoms is not changed by a chemical reaction.


Taya2010 [7]3 years ago
4 0
According to the law of conservation of matter, the number of  Atoms<span> is not changed by a chemical reaction. 
</span><span>

 They're the same before and after a chemical reaction</span>
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In 1985 benitoite became the California "state gemstone." Found only in a tiny mine near Coalinga, California, it is a silicate
Andreyy89
Answer is:  there are 0,06525 moles of oxygen in 15 carat <span>benitoite</span>.
m(BaTi(SiO₃)₃) = 15 carat ÷ 5 carat/g = 3 g.
M(BaTi(SiO₃)₃) = Ar(Ba) + Ar(Ti) + 3Ar(Si) + 9Ar(O) · g/mol.
M(BaTi(SiO₃)₃) = 137,33 + 47,87 + 3 · 28,09 + 9 · 16 · g/mol.
M(BaTi(SiO₃)₃) = 413,5 g/mol.
n(BaTi(SiO₃)₃) = m(BaTi(SiO₃)₃) ÷ M(BaTi(SiO₃)₃).
n(BaTi(SiO₃)₃) = 3 g ÷ 413,5 g/mol.
n(BaTi(SiO₃)₃) = 0,00725 mol.
In one molecule of <span>benitoite there are nine oxygen atoms.
</span>n(O) = 9 · 0,00725 mol.
n(O) = 0,06525 mol.
5 0
3 years ago
Predict the precipitate that will be formed in the following reaction:<br> NaF(aq) + AgNO3(aq) →
netineya [11]

The precipitate that will be formed : AgF

<h3>Further explanation</h3>

One indication of the double displacement reaction is the precipitation reaction

Solubility Rules:  

• 1. soluble compound  

All compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +  

All compounds of NO₃⁻ and C₂H₃O₂⁻  

Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺  

Compounds of SO₄²⁻ except for Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺  

• 2. insoluble compounds  

Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +  

Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺, Sr²⁺, and Ba²⁺  

Reaction

NaF(aq) + AgNO₃(aq) →NaNO₃(aq)+ AgF(s)

From the solubility rules above, it has been shown that the salts of the Ag⁺ cations are insoluble salts

8 0
3 years ago
What is the percentage composition of each element in dinitrogen monoxide, N2O?
Kitty [74]

The correct answer is C :)

4 0
3 years ago
Read 2 more answers
Ammonia and hydrogen fluoride both have unusually high boiling points due to
nexus9112 [7]

Answer:

C. hydrogen bonding

Explanation:

Ammonia and hydrogen fluoride are both able to exhibit hydrogen bonding due to containing nitrogen (in ammonia) and fluoride (obviously in hydrogen fluoride). Remember the unique qualities of NOF. :)

5 0
3 years ago
Which of the following are examples of conservable quantities? a. potential energy and length c. mechanical energy and mass b. m
Blababa [14]

Answer:

b

Explanation:

7 0
3 years ago
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