Use this formula to find it

Starting amount = 40g
Half life = 4 days
Time gone = 12 days
Amount left = 40 (1/2)^12/4
= 40 (1/2)^3
= 40 (1/8)
= 5 grams
Answer:
0.02.55M
Explanation:
Concentration = moles/ volume(L)
10mL= 0.01L
Concentration (M)= 0.0255 mol / 0.01L
Concentration (M)= 0..255M
<u>Superior</u> means anything which is higher in rank , status or quality among similar other things or people.
<u>Posterior</u> means something which is at back.
<u>Inferior</u> means anything which is lower in rank , status or quality among similar other things or people.
<u>Anterior</u> means something which is nearer to the front.
∴ Pair of opposite terms is: Superior/inferior
the answer is D.) wear recommended PPE for protection
Answer:
n = 0.34 mol
Explanation:
Given data:
Given temperature = 789 K
Pressure = 765 torr ( 765/760 = 1.0 atm
Volume of container = 22.0 L
Number of moles of gas = ?
Solution:
Formula:
PV = nRT
n = PV/RT
n = 1.0 atm × 22.0 L / 0.0821 atm.L/mol.K ×789 K
n = 22.0 L.atm /64.8 atm.L/mol
n = 0.34 mol