Hydrogen is grouped with the alkali metals because they are grouped based on their properties and behavior, and like the other elements in Group 1 (1A), it only has one valence.
Answer:
C. A Spring Scale
Explanation:
Using process of elimination, we can quickly decide that a stopwatch and a ruler will not be useful in measuring the force. This leaves us with either the spring scale or a balance scale. A balance scale is used to compare two weights, so this is eliminated. That leaves us with a spring scale. This is because we can attached the spring scale to the car and when we let it go, we can record the force. I hope this helps!
First convert the given volume of hydrogen gas to grams by
multiplying the volume with the given density. The mass of hydrogen gas is
22.50197 grams. Then convert the mass of hydrogen to moles by dividing it with
its molar mass. Multiply the moles of hydrogen gas with 2/3 because in the
formation of ammonia you would need 3 mol of hydrogen to form 2 moles of
ammonia. Then multiply the moles of ammonia with the molar mass which is 17.031
grams. The mass of ammonia is 126.48 grams.
Answer:
Vapor pressure for solution is: 20.48 Torr
Explanation:
Formula to be applied: ΔP = P° . Xm
ΔP = P° - P'
P° → Vapor pressure of pure solvent
P' → Vapor pressure of solution
Xm = Mole fraction.
Let's replace data → 26.5 Torr - P' = 26.5 Torr . 0.227
P' = - (26.5 Torr . 0.227 - 26.5 Torr) →
<span>The number of molecules of each gas must be equal since 1 mol of any gas needs to contain 6.02x10^23 molecules. So 1mol O</span>₂ and 1mol CO both need to contain 6.02x10^23 molecules