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3 years ago

Please answer right this us due today please don't guess pls

Chemistry

2 answers:

timofeeve [1]3 years ago

8 0

1C

2B !! hope this help

Paraphin [41]3 years ago

3 0

1 is C and 2 is B :)

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Where would we find yellow bone marrow?

Doss [256]

Answer:

Yellow bone marrow can be found in the long bones of the human body one such bone being the femur the yellow bone marrow contains certain stem cells which produce cartilage, fat and bone.

Explanation:

8 0

3 years ago

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Determine la cantidad aproximada de nitrato potásico (NaNO3) que habrá que mezclar con 150 g de agua para obtener una disolución

hammer [34]

Answer:

Determine the approximate amount of potassium nitrate (NaNO3) that must be mixed with 150 g of water to obtain a saturated solution at 10ºC.

A) 80 g

B) 40 g

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D) 160 g

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3 years ago

Working on-board a research vessel somewhere at sea, you have (carefully) isolated 12.5 micrograms (12.5 ×10–6 g) of what you ho

german

Answer:

The value is $Z = 311.33 \ g/mol$

Explanation:

From the question we are told that

The mass of saxitoxin is $m = 12.5 mg = 12.5 * 10^{-6} g$

The volume of water is $V = 3.10 mL = 3.10 *10^{-3} L$

The osmotic pressure is $P = 0.236 = \frac{0.236}{760} = 3.105 * 10^{-4} atm$

The temperature is $T = 19^oC = 19 + 273 = 292 \ K$

Generally the osmotic pressure is mathematically represented as

$P = C * T * R$

Here R is the gas constant with value

$R = 0.0821 ( L .atm /mol. K)$

and C is the concentration of saxitoxin

$3.105 * 10^{-4} = C * 0.0821 * 292$

$C = 1.295 *10^{-5} mol/L$

Generally the number of moles of saxitoxin is mathematically represented as

$n = C * V$

=> $n = 1.295 *10^{-5} *3.10 *10^{-3}$

=> $n = 4.015 *10^{-8} \ mol$

Generally the molar mass of saxitoxin is mathematically represented as

$Z = \frac{m}{n}$

=> $Z = \frac{12.5 * 10^{-6}}{ 4.015 *10^{-8}}$

=> $Z = 311.33 \ g/mol$

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4 years ago

[2071]State and explain Kohlrusch's law.

notsponge [240]

I have no idea how about it lol I t

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3 years ago

What mass of silver chloride can be produced from 1.65 l of a 0.240 m solution of silver nitrate?

Liono4ka [1.6K]

Check table T and use the concentration equation. Molarity= moles of solute/ liters of solution.

So 0.240 = x/ 1.65 once u find the # of miles of solute (x=.396) and substitute that

Wait I'm not sure if it's correct

4 0

4 years ago