Answer:
0.0697 moles
Explanation:
We are being asked 4.2 x 10^22 atoms of aluminium to moles the following should be used for conversion.
Fraction of 1 mole Al over six point zero two two times ten to twenty third power atom Al.
that is 1 mole = 6.022 x10^23 atom
? = 4.2 x 10^22 atom
by cross multiplication
(1 mole x 4.2 x 10^22)/ 6.022 x 10^23 = 0.0697 moles
Answer:
The final pressure of the gas is 370. kPa
Explanation:
Let's assume the gas inside cylinder behaves ideally.
As amount of gas remains constant in both state therefore in accordance with combined gas law for an ideal gas-
where and are initial and final pressure respectively.
and are initial and final volume respectively.
and are initial and final temperature in kelvin scale respectively.
Another assumption is necessary to solve this problem which is the process should be isothermal.
So , , and
Hence
So the final pressure of the gas is 370. kPa
Answer:
a Control Variable in an experiment remains the same.
Answer:
D.) Rate-Determining Step
Explanation:
Rate - Determining Step -
The slowest step of any of the chemical reaction helps to find the overall rate of the chemical reaction , and , hence is known as the rate - determining step .
There are two type of reaction possible , one is elementary reaction and a complex reaction .
Elementary reaction is a single step reaction , and hence , that very step determined the rate of the reaction and hence is known as the rate determining step .
And ,
In case of a complex reaction , the reaction is preceded by many steps , and hence , the slowest step among other steps is known as the rate determining step of the reaction .
Answer:
The answer is: A - Dimensions of the paper.
Explanation:
"A" is the independent variable because it is the only thing that you are manipulating in each trial (i.e. folding the paper in half each time). "B" is the dependent variable because it is what you are measuring in every trial. "C" and "D" remain constant (they aren't changed at all) so they are neither dependent or independent variables.