Prevent the release of toxic vapored, dusts, mists, or gases into the workplace air
The answer is B because that is how plants give off oxygen.
Answer:
Percent error = 41%
Explanation:
Percent error:
Percent error is the difference between the measured value and actual value divided by actual value multiply by 100.
Given data:
Actual length of rope = 3.15 m
Measured length of rope = 1.85 m
Percent error = ?
Solution:
Formula:
Percent error = [measured value - actual value / actual value ] × 100
Now we will put the values in formula.
Percent error = [1.85 - 3.15 / 3.15 ] × 100
Percent error = [-1.3 /3.15 ] × 100
Percent error = -0.41 × 100
Percent error = 41%
The negative sign shows that measured value is less than the actual value but often results are reported in absolute value.
Answer:
The formula for Lead(ll) Oxide is PbO.
Explanation:
The symbol for Lead is Pb.
The symbol for Oxygen is O.
Given,Oxidation state of Pb = +2
We know,
Oxidation state of Oxygen in all Oxides is the same and is equal to -2,
Let the no. of Pb atoms in the oxide = x;
no.of Oxygen atoms = y;
Concept:
Sum of oxidation states of all atoms in any compound is equal to zero.
Applying concept,we get,
x(+2) + y(-2) = 0
x(+2) = y(+2)
Therefore, x = y
and, x : y = 1:1 ;
Therefore the empirical and the correct formula of the oxide is ,which is .