Answer: The answer has 7 significant figures
Explanation:
The addition of 190.5 and 42.1014 will give 232.6014. Counting the digits will give 7 significant figures.
Answer:
3.78 gm O2
Explanation:
In the reaction represented by the equation 2Al2O3 → 4A1 + 302, calculate the theoretical amount in grams of oxygen, O2 produced if 11.84 grams Al2O3 decomposes?
for every 2 moles of Al2O3, 3 mole of 02 are produced
molecular weight of Al2O3 =(2X27) + (3X32) =54+96= 150
11.84 gm Al2O3 = 11.84/150 moles =0.0789 moles
This will produce 3/2 X 0.0789 moles of O2 = 0.118 moles O2
mol wt of O2 is 32
0.118 moles weighs 0.118X32 = 3.78 gm O2
The beta particle is equivalent to a electron
Answer:
2284.2 g.
Explanation:
The following data were obtained from the question:
Percentage yield = 47%
Theoretical yield = 4860 g
Actual yield =?
The percentage yield is simply defined as the ratio of actual yield to the theoretical yield multiplied by 100. Mathematically, it is expressed as:
Percentage yield = Actual yield /Theoretical yield x 100
With the above formula, we can obtain the actual yield as follow:
Percentage yield = Actual yield /Theoretical yield x 100
47% = Actual yield /4860
Cross multiply
Actual yield = 47% × 4860
Actual yield = 47/100 x 4860
Actual yield = 2284.2 g
Therefore, the actual yield is 2284.2 g.
Cells are considered one of the characteristics of life because all living things are made of cells