D= 0.10125kg/m^3
EXPLAINATION
Density =mass/volume
D= 226.8/20 x 8 x 14
D=226.8/2240
D= 0.10125kg/m^3
Hope it was helpfull!!
Answer:To calculate the Molarity of a 70 wt. % Nitric Acid the number of moles of HNO 3 present in 1 liter of acid needs to be calculated. Knowing the density of the acid to be 1.413 g/mL, we can calculate the weight of 1 L of 70% HNO 3 to be 1413
Explanation:
Answer:
The average speed per hour is 50 miles
Explanation:
6x 50= 300
Answer:
years.
Explanation:
The half-life is the time needed to reduce in 50% the mass of the sample. So, imagine compound A, after its first half-life, it will have 0.5A. After its second half-life, will have 50% of the 0.5A! So, the mass will be 0.25A. So, the percentage of A, is given by:
Where n is the quantitative of half-life. So, for 18.7% of C, or 0.187:
Applying log in both side of the equation:
nlog(0.5) = log(0.187)
-0.301n = -0.728
n = 2.419 half-life
If one half-life is 5,730 yr, than 2.419 will be:
2.419x5730 = 13,860.870 yr
years.