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artcher [175]
3 years ago
11

What are two ways to tell if a chemical reaction is taking place?

Chemistry
2 answers:
lorasvet [3.4K]3 years ago
6 0
A chemical reaction is observed by physical effects that cannot be undone, for Ex. If an object give off heat or light, thats a chemical reaction. If theirs a change in an objects color it can be a chemical reaction, like rust. Metal turning silver to brown. <span />
Kruka [31]3 years ago
4 0
1) temperature change
2)odor or smell change
Hope this helps
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Which two elements have the same number of energy levels with electrons in them?(1 point)
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How many moles of H2O are in 42.0 g H2O?
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3 years ago
Read 2 more answers
What is the reason for the low solubility of LiF (0.27 g
Brut [27]

Answer:

The answer is C. The high solvation energy for LI+

Explanation:

LiF has lower solubility because of the high solvation energy of Li+ ion. This is due to the smaller  size and very big charge compared to Cs+ ion which has a bigger size and solvent molecules easily surround it.

Solvation energy is simply the amount energy that is required to make a solute dissolve in a solvent.

3 0
3 years ago
If a solution containing
tankabanditka [31]

Answer:

Hg(NO₃)₂(aq) + Na₂SO₄(aq)   →   2NaNO₃(aq) + HgSO₄(s)

Moles of Hg(NO₃)₂ = 55.42 / 324.7 ==> 0.1707 moles

Moles of Na₂SO₄ = 16.642 / 142.04 ==> 0.1172 moles

Limiting reagent is Na₂SO₄ as it controls product formation

Moles of HgSO₄ formed = 0.1172 moles

                                        = 0.1172 x 296.65

                                        = 34.757g

Explanation:

6 0
3 years ago
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