Answer:
NiO
Explanation:
Firstly, we need to know the mass of oxygen used up. This is the difference between the mass of the nickel and the mass of the oxide. This is : 2.852 - 2.241 = 0.611g
Now we convert these masses to mole by dividing by their atomic masses. The atomic mass of oxygen is 16 while that of nickel is 59
O = 0.611/16 = 0.0381875
Ni = 2.241/59 = 0.037983050847458
The next thing is to divide each by the smaller number of moles, which is that of the nickel.
O = 0381875 /0.037983050847458= 1
Ni= 0.037983050847458/0.037983050847458= 1
The empirical formula is thus NiO
Answer:
If the change is +15 degrees Celsius, the change is +15 Kelvin (note that it's not degrees Kelvin, just simply Kelvin). You can use the conversion, which is 273.15 Kelvin = zero degrees Celsius. Since it's a relative scale, 10 C = 274.15 K, and 20 C = 275.15 and so forth.
There are 12 inches in a foot and 36 inches in a yard. SO your answer is 900 inches
