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Alexus [3.1K]
3 years ago
5

A precipitate is a solid that sometimes forms when two liquids combine. A true B False

Chemistry
2 answers:
lisov135 [29]3 years ago
6 0
<h2>Question:</h2>

A precipitate is a solid that sometimes forms when two liquids combine.

<h2>Choosing:</h2>

A. True

B. False

<h2>Answer:</h2>

<u>A</u><u>.</u><u> </u><u>True</u>

<h3><u>#READINGHELPSWITHLEARNING</u><u> </u></h3><h3><u>#CARRYONLEARNING</u><u> </u></h3><h3><u>#STUDYWELL</u><u> </u></h3>
r-ruslan [8.4K]3 years ago
3 0
<h2>Question:</h2>

A precipitate is a solid that sometimes forms when two liquids combine.

<h2>Answer:</h2>

<u>A</u><u>.</u><u> </u><u>True</u><u> </u>

<h2>Explanation:</h2>
  • <u>Because</u><u> </u><u>the</u><u> </u><u>Precipitate</u><u> </u><u>it's</u><u> </u><u>forms</u><u> </u><u>solid</u><u> </u><u>when</u><u> </u><u>two</u><u> </u><u>liquids</u><u> </u><u>combine</u><u> </u><u>to</u><u> </u><u>precipitate</u><u>.</u><u> </u>

<h2><u>#CARRYONLEARNING</u><u> </u></h2><h2><u>#STUDYWELL</u><u> </u></h2>
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Which of the following shows the conservation of mass during cellular
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Answer:

C6H12O6 + 6O2 - 6CO2 + 6H2O + ENERGY

Explanation:

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3 years ago
how many grams of the excess reactant are left over according to the reaction below given that you start with 10.0 g of al and 1
yan [13]

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divide 10.0g by each reactant's respective molar mass then divide that number by its coefficient in the balanced reaction. the smaller of the two numbers indicates the limiting reactant - it’s Al

4 0
3 years ago
Is O2 always a double bond?
Dima020 [189]
  • O-O single bonds and H-O single bonds in \text{H}_2\text{O}_2 molecules.
  • H-O single bonds in \text{H}_2\text{O} molecules.
  • O=O double bonds in \text{O}_2 molecules.
<h3>Explanation</h3>

How many valence electrons do atoms in each molecule need for them to be stable?

  • Each H atom needs two valence electrons to be stable.
  • Each atom of an element other than H needs eight valence electron to be stable.
  • There are two H atoms and two O atoms in an  \text{H}_2\text{O}_2 molecule. Atoms in each \text{H}_2\text{O}_2 need 2 \times 1 + 2\times 2 = 6 more electrons to be stable.
  • There are two H atoms and one O atom in an \text{H}_2\text{O} molecule. Atoms in each \text{H}_2\text{O} molecule need 2 \times 1 + 2= 4 more electrons to be stable.
  • There are two O atoms in an \text{O}_2 molecule. Atoms in each \text{O}_2 molecule need 2 \times 2 = 4 more electrons to be stable.

How many chemical bonds in each molecule?

Each chemical bond adds one valence electron to each bonding atom. Each chemical bond connects two atoms. As a result, each chemical bond adds two valence electrons to the molecule.

  • Each \text{H}_2\text{O}_2 molecule needs 6 / 2 = 3 chemical bonds.
  • Each \text{H}_2\text{O} molecule needs 4 / 2 = 2 chemical bonds.
  • Each \text{O}_2 molecule needs 4 /2= 2 chemical bonds.

What chemical bonds are these? Again, each H atom needs only one more valence electron to be stable. It will share only one electron with O and form one H-O bond. The rest of the chemical bonds are between O atoms.

  • There are two H atoms in each \text{H}_2\text{O}_2 molecule, which form two H-O bonds. Two of the three chemical bonds in this molecule are H-O. The other is an O-O single bond between the two O atoms.
  • There are two H atoms in each \text{H}_2\text{O} molecule, which form two H-O bonds. Both chemical bonds in this molecule are H-O. There's no O-O bond in this molecule.
  • There is no H atom in \text{O}_2 molecules. Both chemical bonds are between O atoms. However, there are only two O atoms. There must be two chemical bonds between the two O atoms. That bond will be an O-O double bond.
3 0
3 years ago
Read 2 more answers
How many moles of NH4NO3(s) must be dissolved in water so that 73.0 kJ of heat is absorbed from the water? (The molar heat of so
SCORPION-xisa [38]
1 mole of NH4NO3 requires absorption of 25.7 kJ/mol.
Therefore; 1 kJ of heat energy is absorbed by dissolving 1/25.7 moles of NH4NO3. 
Hence; For an energy of 73.0 kJ to be absorbed the moles of NH4NO3 that dissolves will be;
 = (1/25.7 × 73)
 = 2.84 moles
Hence; 73 kJ is absorbed by dissolving 2.84 moles of NH4NO3.

7 0
3 years ago
Read 2 more answers
21. For each of the following precipitation reactions,
Phantasy [73]
I would say B.HS(aq)+NiSO4(aq)
6 0
3 years ago
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