Answer:
oxidation-reduction reaction or redox reaction.
Explanation:
If hydrogen gas is passed over heated copper oxide (CuO), the black coating on the surface turns brown as the reverse reaction takes place and copper is obtained
Answer:
MO = 20
Explanation:
Given that: MO = 3x + 5
MN = 2x + 3
NO = 2x - 3
But,
MO = MN + NO
So that;
3x + 5 = (2x + 3) + (2x - 3)
3x + 5 = 2x + 3 + 2x - 3
3x + 5 = 4x
3x - 4x = -5
-x = -5
Multiply through by minus,
x = 5
Thus,
MO = 3x + 5
= 3(5) + 5
= 15 + 5
MO = 20
The length of MO is 20.
To test if the hypothesis is correct, a good way is to think of it this way:
Density = mass/volume, right?
Calculate the mass and volume of each and do the equation; this will test your hypothesis.
You will be left with the density of each. But, make sure that the sample sizes are the same (controlled variable) otherwise it will be an unfair test.
Answer: 4.10 liters
Explanation:
Given that:
initial volume of gas V1 = 3.0L
initial temperature of gas T1 = 273K
new volume V2 = ?
new temperature T2 = 373K
Since, only volume and temperature are involved, apply the formula for Charle's law
V1/T1 = V2/T2
3.0L/273K = V2/373K
To get the value of Z, cross multiply
3.0L x 373K = 273K x V2
1119 = 273V2
Divide both sides by 273
1119/273 = 273V2/273
4.10L = V2
Thus, the new volume is 4.10 liters
Answer:
Neutral.
Explanation:
A solution with 7 on the pH scale would be neutral.