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Neporo4naja [7]
3 years ago
14

PLEASE HELP , 2-8 please

Chemistry
1 answer:
german3 years ago
4 0
Answers:
2. valence electrons
3. a bond formed when atoms share one or more pairs of electrons.
4. chemical formula
5. a. calcium - 2
b. carbon - 4
c. sulfur - 6
6. a. electrons
7. the elements that make up water can't be split into a simpler form, but water can. water is a liquid at room temperature, oxygen and hydrogen are gases at room temperature.

8. because it is made of oxygen and hydrogen and one is partially negative and one is partially positive.

explanation: you’re welcome.
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5 0
3 years ago
1. Three different observers measure the melting point of a substance and agree on the
Naddik [55]

d. precise but not accurte

7 0
4 years ago
How much heat is given off when 8 g of hydrogen reacts in: 2H₂ + O₂ → 2H₂O; ΔH = -115.60 kcal
Sedbober [7]
ΔΗ= -115.6 kJ/mol
H2 has a Mr of 2, so as mol=mass/mr we can work out that there are 4 moles of H reacting

Therefore we multiply -115.6 by 4 = -462.4
4 0
3 years ago
A solution that contains a small amount of salt and a large amount of water is said to be a?
artcher [175]
The answer is dilute. A dilute salt solution contains a small amount of salt with high water concentration while a concentrated salt solution has a large amount of salt with a lower water concentration. Salt is inorganic hence it is not monounsaturated, which is a term related to organic compounds. The salt is unable to dissolve anymore in a saturated salt solution, leaving the undissolved salt at the bottom and this is not the case here since we only have a small amount of salt. 
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3 years ago
Is salt in a sugar bowl considered a solution
charle [14.2K]

The Answer is no. hope this help c:

7 0
3 years ago
Read 2 more answers
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