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Zina [86]
3 years ago
10

If Hydrochloric Acid and Calcium Carbonate were combined would the reaction that occurs be endothermic or exothermic? Why?

Chemistry
1 answer:
slamgirl [31]3 years ago
4 0

Answer:

endothermic

Explanation:

more energy is being released and heat is being required to do the process.

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In which way does a balanced chemical equation demonstrate the conservation of matter?
777dan777 [17]

Answer:

A. It shows the same number of atoms of each element on both sides of the equation.

Explanation:

A balanced chemical equation demonstrates the conservation of matter by showing the number of atoms of each element on both sides of the equation or expression.

According to the law of conservation of matter, matter is neither created nor destroyed in the course of a chemical reaction but atoms are rearranged.

  • Based on this premise, the number of atoms or moles on both sides of the expression must be equal.
  • If there are 3 atoms of carbon on one side, the product must also reflect 3 atoms of carbon.
8 0
3 years ago
Which hydrogen is an unsaturated hydrocarbon ?
Ksivusya [100]

Answer:

Image result for Which hydrogen is an unsaturated hydrocarbon ?

Alkenes have the general formula CnH2n, and are examples of unsaturated hydrocarbons. The presence of a double bond compound's structure causes there to be two fewer hydrogen atoms in the molecule than there are in an alkane with the same number of carbon atoms.

3 0
3 years ago
how many moles of sodium phosphate are required to make 7.5 moles of sodium nitrate in 2Na3PO4+3Be(NO3)=6NanO3+Be3(PO4)2
KIM [24]

Answer:

<em>2.5</em> moles of sodium phosphate

Explanation:

3 Pb(NO3)2 + 2 Na3PO4 → Pb3(PO4)2 + 6 NaNO3

6 (moles in the reaction)- 7.5(moles  in the task)

2 (moles in the reaction)- x (moles in answer) ⇒6x = 2*7.5 ⇒ x = 15/6=2.5 (moles)

8 0
2 years ago
What are the steps for writing the formula for a molecular compound? Naming a molecular
Vlad [161]

Answer:

Your question was explained in my chemistry book so I just shared the picture

Hope that helps

6 0
3 years ago
Blood serum is typically about 0.0044 M in K+ (aq). Calculate the mass of the potassium ions in 4,459. mL of blood serum. The mo
12345 [234]

Answer:

0.767 g.

Explanation:

Molarity (M) is defined as the no. of moles of solute dissolved in a 1.0 L of the solution.

M = (no. of moles of K⁺)/(Volume of the solution (L).

<em>∵ no. of moles of K⁺ = (mass/molar mass) of K⁺.</em>

<em>∴ M = (mass/molar mass) of K⁺/(Volume of the solution (L).</em>

<em></em>

M = 0.0044 M.

Volume of the solution = 4459.0 mL = 4.459 L.

mass of K⁺ = ??? g.

molar mass of K⁺ = 39.01 g/mol.

∴ mass of K⁺ = (M)((molar mass of K⁺)(volume of the solution (L)) = (0.0044 M)(39.10 g/mol)(4.459 L) = 0.767 g.

7 0
3 years ago
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