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2 years ago

John Dalton believed that:

1 answer:

5 0

All matter is made of atoms that cannot be destroyed or divided. ANNNND all atoms of a certain element are the same
Ex. All atoms in gold have the same mass and properties. It helps to write notes

Thank me later ∵

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What is the percent yield of ferrous sulfide if the actual yield is 220.0g and the theoretic yield is 275.6?

Amanda [17]

ANSWER yield = 79.83%

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2 years ago

What is the osmotic pressure of a solution made from 22.3 g of methanol (MM = 32.04 g/mol) that was added to water to make 321 m

xxMikexx [17]

Answer: The osmotic pressure of a solution is 53.05 atm

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iMRT$

Or,

$\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT$

where,

$\pi$ = osmotic pressure of the solution = ?

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (methanol) = 22.3 g

Volume of solution = 321 mL

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

T = temperature of the solution = $25^oC=[273+25]=298K$

Putting values in above equation, we get:

$\pi=1\times \frac{22.3\times 1000}{32.04\times 321}\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K$

$\pi=53.05atm$

Hence, the osmotic pressure of a solution is 53.05 atm

7 0

2 years ago

How many grams are in 1.6 moles of potassium bromide?

slava [35]

Answer:

190.4g

Explanation:

1.6mol of KBr (119.002g KBr/1 mol) = 190.4g

since you want to find grams, take the molar mass of KBr (119.002) per 1 mol and use it as your conversion factor (119.002g KBr/1 mol) which will then cancel out mols and leave you with grams.

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2 years ago

What did you include in your response?<br>check all that apply

erma4kov [3.2K]

Answer: i don't know

Explanation:

u gave no information on what you're asking

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2 years ago

All of the following are true about the Earth’s inner core EXCEPT

Inessa05 [86]

<span>that it is cooler than the lithosphere.</span>

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2 years ago