Answer:
2.__ Dissolving two solids in water before mixing them together.
4.__ Grinding a solid into fine particles.
5.__ Adding an enzyme catalyst.
Explanation:
The rate of reaction is the measure of the speed of a chemical reaction.
Some factors affects the rate of reactions such as pressure, temperature, concentration, surface area, presence of catalyst.
- Reactions in liquid medium are much faster than those between solids because there is a flow of substances. As they come in contact with one another, collision begins to take place.
- Grinding a solid into fine particles increases the surface area. An increase in surface area increases the rate of reaction.
- Adding an enzyme catalyst lowers the activation energy and reduces the energy barrier that must be overcome before a reaction takes place.
Answer:
i working on this too
i might be able to tell u the right answer when im done
Explanation:
Answer: 4
Explanation: Your counting 4 for each interval. 9+4 =13 13+4 =17 17+4 =21 and so on.
Answer:
It would take 64 1-cm cubes to construct a 4-cm cube.
Explanation:
The volume of a cube is equal to the edge raised to the power of 3.
A 1-cm edge cube has a volume of V₁ = (1 cm)³= 1 cm³
A 4-cm edge cube has a volume of V₄ = (4 cm)³= 64 cm³
The number of small cubes required to fill the same volume than the big cube is:
<span>You would use the equation: Molarity M equals amount of solution over volume of solution. So, 0.758 M equals x L divided by 1.55 L OR 0.758 M = x L / 1.55 L . To solve: 1.55 multiplied by 0.758 equals 1.1479. The answer is 1.1479.</span>
