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yulyashka [42]
4 years ago
5

Do u think the ocean has valleys and mountains?explain

Chemistry
1 answer:
Kryger [21]4 years ago
7 0
If you ever heard of a trench in the bottom of the ocean it is an underwater valley
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I need help with acids and bases.
Alisiya [41]

levels greater than seven are bases

levels on 7 are neutral

levels low than 7 are acids

there are 14 levels, Acids change litmus paper red and Bases change litmus paper blue.

5 0
3 years ago
In the galvanic cell Al(s) ǀ Al3+(aq, 1 M) ǀǀ Cu2+(aq, 1 M) ǀ Cu(s) which of the following changes will increase the cell potent
dangina [55]
The cathode electrode is copper. This means that the concentration of copper must be increased to increase the cell potential. This can be done by diluting the Al3+ solution. Increasing the surface area will not change the current but will increase the voltage. The answer is (D) I and III only.
3 0
3 years ago
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If we reverse the reaction to read Z + Q → X + Y, the +ΔH would be a -ΔH. Does this indicate that heat is given off or absorbed
rusak2 [61]
-delta H symbolises an exothermic reaction. Hence, it gives off heat. Reversely, it would absorb heat.

5 0
4 years ago
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4.62 ) (a) Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 750 mL
Gelneren [198K]

Answer:

a. [Na₂CrO₄] = 0.10 M

b. 0.017 moles of KBr

Explanation:

Molarity means a sort of concentration which indicates the moles of solute over 1L of solution.

We determine the moles of solute: 12.5 g / 162g/mol = 0.0771 moles

We convert the volume of solution from mL to L = 750 mL . 1L/1000mL = 0.750L

Molarity (mol/L) → 0.0771 mol / 0.750L = 0.10 M

b. In order to determine the moles of solute, with the molarity of solution and the volume we assume:

Molarity = moles of solute /volume of solution

Then, Molarity . Volume of solution (L) = moles of solute

We convert the volume of solution from mL to L = 150 mL . 1L/1000mL = 0.150L

0.112 mol/L . 0.150L = Moles of solute → 0.017 moles of KBr

5 0
4 years ago
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If you have two wires made out of the same material and the same thickness, one is 3-inches long and one is 6-inces long, which
Harlamova29_29 [7]

Answer:

6 inces

Explanation:

8 0
3 years ago
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