Answer:
"To ensure safe and healthful working conditions for working men and women by setting and enforcing standards and by providing training, outreach, education and assistance."
Explanation:
Hello,
The OSHA -Occupational Safety and Health Administration- is an agency of the United States Department of Labo signed into law on December 29, 1970. It was created to prevent workers from being killed or seriously harmed at work. The law requires that employers provide their employees with working conditions that are free of known dangers.
The mission is "to ensure safe and healthful working conditions for working men and women by setting and enforcing standards and by providing training, outreach, education and assistance."
Best regards.
The change in volume is
V₂ - V₁ = 1.26 - 5 L = - 3.74 L = - 3.74 x 10⁻³ m³
The constant pressure is
p = 0.857 atm = 0.857*101325 Pa = 86836 Pa
By definition, the work done is
Answer:
The work involved is 324.8 J
Let's find the number of moles first.
Number of moles = mass/molar mass
Molar mass = 51.9961
Number of moles = 13/ 51.9961 = 0.2500.
1 mole of any particle contains 6.02 * 10^(23) atoms.
Hence 0.2500 moles contains X
Hence X = 0.25 * 6.022 * 10^(23) = 1.5055 * 10^(23)
Answer:
The correct answer is option D: Reheat the sample until its mass is constant.
Explanation:
The student should reheat the sample until its mass will be constant. This to avoid that the percentage contains other substances than only water. During heating, hydrated salt loses its water. He only wants to know the percentage of water, so until the mass keeps changing a lot ( isn't constant), means there is still both water and salt. If the mass doesn't change anymore, means that all the water has been heated and evaporated. Then he can calculate the percentage of salt in the sample, and thus the percentage water as well.