Answer:
Benzene: 37.5 Torr
Methylbenzene: 12.5 Torr
Explanation:
By Raoult's Law, each substance in a gas mixture contributes to the total pressure of the mixture proportionally to their respective mole fraction. So,
Ppartial = x*P°
Where x is the mole fraction (0.5 for each one because it's equimolar), and P° is the vapor pressure.
Benzene: Ppartial = 0.5 * 75 = 37.5 Torr
Methylbenzene: Ppartial = 0.5 * 25 = 12.5 Torr
Answer: the molar mass is 74.092 g/mol
Explanation:
Explanation:
A.
Yes
B.
2KHP + Mg(OH)2 = 2KOH + Mg(HP)2
KHP is an acidic salt which reacts with Mg(OH)2 which is a base via double displacement/decomposition reaction.
C.
• One approach is to prepare the solution volumetrically using KHP crystals.
• Preparing 1 liter of 0.1 M KHP you would add 0.1 moles of KHP
Molar mass of KHP(C8H5KO4)
= (12*8) + (5*1) + 39 + (16*4)
= 204 g/mol
Number of moles = mass/molar mass
= 20.4/204
= 0.1 mol.
• This is added to a 1 liter volumetric flask, add deionized water until near the fill line, stopper and mix
D.
Number of moles = molar concentration * volume
= 0.025 * 0.100
= 0.0025 mol
Equation for the reaction:
Ba(OH)2 + 2KHP --> Ba(KP)2 + 2H2O
1 mole of Ba(OH)2 reacted with 2 moles of KHP. By stoichiometry,
Number of moles of Ba(OH)2 = 0.0025/2
= 0.00125 mol.
Molarity = number of moles/volume
= 0.00125/0.01
= 0.125 M of Ba(OH)2.
Answer:
Process 1 is pollination and Process 2 is germination
Explanation:
Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma. The goal of every living organism, including plants, is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds.
Germination refers to the process by which an organism grows from a seed or a spore. The most common forms of germination include a seed sprouting to form a seedling and the formation of a sporeling from a spore. Thus, germination occurs primarily in plant and fungal species.
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Answer:
1.) 0.1 M
2.) 0.2 M
3.) 1 M
4.) Solution #3 is the most concentrated because it has the highest molarity. This solution has the largest solute to solvent ratio. The more solvent there is, the lower the concentration and molarity.
Explanation:
To find the molarity, you need to (1) convert grams NaOH to moles (via molar mass from periodic table) and then (2) calculate the molarity (via the molarity equation). All of the answers should have 1 sig fig to match the given values.
Molar Mass (NaOH): 22.99 g/mol + 16.00 g/mol + 1.008 g/mol
Molar Mass (NaOH): 39.998 g/mol
4 grams NaOH 1 mole
---------------------- x ------------------ = 0.1 moles NaOH
39.998 g
1.)
Molarity = moles / volume (L)
Molarity = (0.1 moles) / (1 L)
Molarity = 0.1 M
2.)
Molarity = moles / volume (L)
Molarity = (0.1 moles) / (0.5 L)
Molarity = 0.2 M
3.)
Molarity = moles / volume (L)
Molarity = (0.1 moles) / (0.1 L)
Molarity = 1 M
