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Bad White [126]
3 years ago
14

Can anyone please help me with my chemistry homework? It’s about molarity. I can’t message anyone here because I’m new to brainl

y. But I will reply to you in the comment section and give you my information. So please help if you’re good at chemistry.
Chemistry
1 answer:
GREYUIT [131]3 years ago
4 0

Answer:

ok sure

Explanation:

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Explanation:

There are non-polar side chains also present in alanine. And, these non-polar side chains are involved in some hydrophobic interactions in active sideand then it changes into polar amino acid glutamate that will destroy the hydrophobic interaction.

Whereas in glycine there is only hydrogen present in the side chain therefore, it will not affect much.

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Which of the following statements about fats is FALSE?
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They dissolve easily in the body’s fluids

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This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generati
tia_tia [17]

Answer: 10.2 grams

Explanation:

The balanced chemical reaction is :

CaH_2(s)+2H_2O(l)\rightarrow Ca(OH)_2(aq)+2H_2(g)

According to the ideal gas equation:

PV=nRT

P = Pressure of the gas = 740 torr =  0.97 atm    (760torr=1atm)

V= Volume of the gas = 12.0 L

T= Temperature of the gas = 19°C = 292 K    0^0C=273K

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas

n=\frac{PV}{RT}=\frac{0.97\times 12.0}{0.0821\times 292}

n=0.48

According to stoichiometry:

2 moles of hydrogen are generated by = 1 mole of CaH_2

Thus 0.48 moles of hydrogen are generated by =\frac{1}{2}\times 0.48=0.24 moles of CaH_2

Mass of  CaH_2=moles\times {\text {Molar mass}}=0.24mol\times 42g/mol=10.2g

Thus 10.2 grams of CaH_2 are needed to generate 12.0 L of hydrogen gas if the pressure of hydrogen is 740. torr at 19°C

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3 years ago
A. Use the words below to complete the sentences.
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Its Concentration, diffusion, a selectively Premable membrane, osmosis,diffusion, a selectively permeable membrane, osmosis, and diffusion
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An aluminum block has a density of 2.70 g/mL. If the mass of the block is 24.60 g, find the volume of the substance.
harina [27]

Volume of a substance can be determined by dividing mass of the substance by its density.

That can be mathematical shown as:

Density=Mass/Volume

So, Volume=Mass/Density

Here mass of the substance given as 24.60 g

Whereas density of the substance is 2.70 g/mL

So,

Volume=Mass/Density

=24.6/2.7

=9.1 mL

So volume of the substance is 9.1 mL.

8 0
3 years ago
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