Answer:
Explanation:
Probability of one ²H is 0.00015 = 1.5× 10⁻⁴
Probability of two ²H is 1.5× 10⁻⁴ × 1.5 × 10⁻⁴ = 2.25 × 10⁻⁸
Probability of two ²H plus one ¹⁸O is 2.25 × 10⁻⁸ × 0.0020
= 4.5× 10⁻¹¹
Molecules in 1.0 mol water = 1.0 × 6.022 × 10²³ × 4.5 × 10¹¹
= 2.7 × 10¹³
There are 2.7 × 10¹³ molecules of ²H₂¹⁸O in 1.0 mol of water.
We can calculate the amount of Oxygen in this volume using the Ideal Gas Equation, PV = nRT, where "P" is the pressure, "V" is the volume, "n" is the number of moles of material, "R" is the gas constant, and "T" is the temperature in Kelvin. To properly answer this problem, all of the information needs to be converted into the proper units. Fortunately, everything except the volume and temperature is in the correct units for the Ideal Gas Equation; the volume can be adjusted by converting mL to L (x1000) and the temperature can be adjusted by adding 273.15 to the current temperature (conversion from Celsius to Kelvin).
Plugging in all the values, we find that:
PV = nRT
(2.7 atm)(0.3 L) = n(0.0821*)(313.15 K)
n = 0.0315 mol Oxygen
Under these conditions, 0.0315 moles of oxygen can be placed in this volume.
Hope this helps!
* - the units are liters times atmospheres divided by moles times Kelvin.
The answer is A. Most galaxies appear to be moving away from each other. Scientists discovered this when looking through very expensive microscopes, and saw that the universe was always growing and expanding, as if exploding from one point and moving outward.
Basically the temperature it would take to boil water which is 100 degrees celcius, the equivalent of 212 degrees farenheight