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nadya68 [22]
4 years ago
13

Sugar dissolves readily in water because it is a(n) ____ substance.

Chemistry
1 answer:
Mnenie [13.5K]4 years ago
3 0
The answer to this question would be D. Hydrophilic.

The word hydrophilic mean attracted by water. That means the molecule has a force to attract water molecule, thus be able to dissolve in water.  The polarity of the molecule would determine whether a molecule hydrophilic or not.
Its opposite would be hydrophobic which the molecule can't dissolve in water.  One example of this would be oil or fat. That is why sometimes it is called lipophilic too.
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A sample of gas at 25ºc has a volume of 11 l and exerts a pressure of 660 mm hg. how many moles of gas are in the sample?
san4es73 [151]
  The  moles of  the gas    in the sample  is 0.391  moles

    calculation
by use  of  ideal  gas  equation, that  is Pv=nRT
where  n  is number  of moles
           P(pressure)= 660  mmhg
           R(gas  constant)  =  62.364 l.mmhg/mol.K
           T(temperature)= 25 +273 =   298 k

by  making  n  the subject of the  formula

n= Pv/ RT

n is therefore=   (660mm hg  x11 L)/(  62.364 L.mmhg/mol.k  x298 K)  = 0.391  moles
5 0
4 years ago
This is a reaction going on in your muscle cells right this very minute:The enzyme triose phosphate isomerase catalyzes this rea
Arisa [49]

Explanation:

The given reaction is as follows.

       E + S \rightleftharpoons ES \xrightarrow[]{k_{2}} E + P

Here, [E] = triose phosphate isomerase = 0.1 nm = 0.1 \times 10^{-9}m

         [S] = Dihydroxy acetone phosphate = 5 \mu m = 5 \times 10^{-6}m

         [P] = Glyceraldehyde-3-phosphate = 2 \mu m = 2 \times 10^{-6}m

Therefore, velocity of the reaction will be as follows.

          v = \frac{d[P]}{dt} = \frac{K_{2}[E][S]}{K_{M} + [S]}

where, K_{M} = Michaelic menten constant = \frac{K_{1} + K_{2}}{K_{1}}

            v = \frac{900 \times 0.1 \times 10^{-9}m \times 5 \times 10^{-6}m}{10^{-5} + 5 \times 10^{-6}}

               = 30 \times 10^{-9} m

or,            = 30 nm/s

Hence, we can conclude that the actual velocity of the forward reaction under physiologic conditions if KM = 10 μM is 30 nm/s.

5 0
3 years ago
Need some help please?
VladimirAG [237]
26. B. 28. B. 20. A.
4 0
2 years ago
What volume of solution gives the desired moles?
motikmotik

Answer:

1. 0.073L

2. 0.028L

3. 0.014L

Explanation:

The volume for the different solutions are obtained as shown below:

1. Mole = 0.53mol

Molarity = 7.25M

Volume =?

Molarity = mole /Volume

Volume = mole /Molarity

Volume = 0.53/7.25

Volume = 0.073L

2. 0.035mol from a 1.25M

Mole = 0. 035mol

Molarity = 1.25M

Volume =?

Molarity = mole /Volume

Volume = mole /Molarity

Volume = 0.035/1.25

Volume = 0.028L

3. Mole = 0.0013mol

Molarity = 0.090M

Volume =?

Molarity = mole /Volume

Volume = mole /Molarity

Volume = 0.0013/0.090

Volume = 0.014L

8 0
3 years ago
I need a background information for this lab report if anyone could help me please :((( it's due tomorrow
UkoKoshka [18]
So the whole point is that you need a abstract.
7 0
3 years ago
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