Answer:D. 2.61 x 10^22
Explanation:
Given that mass of Lead(Pb) = 8.97g
Molar mass of lead =207.2g/mol
No of moles = Mass / molar mass
=8.97g/207.2g/mol
= 0.04329moles
Converting to atoms using Avogadro's number
we know that
1 mole = 6.022 x 1023 atom
Therefore 0.04329 moles of Pb = 0.04329moles x 6.022 x 10^23 atoms
=2.6069 x 10^22
=2.61 x10^22atoms
Answer:
i was thinking it would be best to use dish cloth
Explanation:
if u just use a plastic scrubber to wash dishes than it would be most likely to make it more duty than using a cloth however it is clean only problem for dish cloth is after using it for 2 or 3 months most likely two you would have to wash i know this because I've done it before and i found out that dish cloth is much better and safer to use. i pray i got the right answer if not hey i was just trying to help y'all its alright with me
Answer:
The pressure of the gas is 0.278 atm
Explanation:
Step 1: Data given
Number of moles of the ideal gas = 0.540 moles
Volume = 35.5 L
Temperature = 223 K
Step 2: Calculate the pressure of the gas
p*V = n*R*T
⇒with p = the pressure of the gas = TO BE DETERMINED
⇒with V= the volume of the gas = 35.5 L
⇒with n = the moles of the gas = 0.540 moles
⇒with R = the gas constant = 0.08206 L*atm/mol*K
⇒with T = the temperature of the gas = 223 K
p = n*R*T / V
p = 0.540 * 0.08206 * 223 / 35.5
p = 0.278 atm
The pressure of the gas is 0.278 atm
Answer:
6.97 moles
Explanation:
Formula Used,
Moles = No. of Molecules ÷ 6.022 × 10²³
Putting Values,
Moles = 4.20 × 10²⁴ ÷ 6.022 × 10²³
Moles = 6.97 moles