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Sever21 [200]
3 years ago
6

How many grams (of mass m) of glucose are in 285 ml of a 5.50% (m/v) glucose solution?

Chemistry
1 answer:
ZanzabumX [31]3 years ago
4 0
The percentage of glucose given is m/v. This means that the given percentage of volume consists of mass.
In this solution, percentage of glucose is 5.5% m/v.
This means that 5.5% of the volume is the mass of glucose.
Given volume is 285 mL. 
Therefore mass of glucose is 5.50% of 285 mL = (5.5*285)/100
mass of glucose = 15.67 g
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Corrosive substances are rarely harmful to human skin. True or false?
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False

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8 0
3 years ago
How many moles of butane do we have if we have 5.50 x 1024 molecules<br> of butane (CH) ?
Dmitry [639]

Answer:

9.14moles

Explanation:

Given parameters:

Number of atoms of butane  = 5.5 x 10²⁴atoms

Unknown:

Number of moles  = ?

Solution:

To solve this problem, we must understand that a mole of any substance contains the Avogadro's number of particles.

             6.02 x 10²³ atoms makes up 1 mole of an atom

             5.5 x 10²⁴ atoms will contain = \frac{5.5 x 10^{24} }{6.02 x 10^{23} }  = 9.14moles

7 0
3 years ago
You have a mixture that contains 0.380 moles of Ne(g), 0.250 moles of He(g), and 0.500 moles CH4(g) at 400 K and 6.25 atm. What
Bas_tet [7]

Answer:

1.38 atm

Explanation:

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Mole fraction of a gas is moles of a gas ÷ total moles of all gases.

4 0
3 years ago
The empirical formula of hydrazine, molecular mass 32 grams, is NH2. What is the molecular formula of hydrazine?
fgiga [73]

Answer:

C) I think..

Explanation:

7 0
2 years ago
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UkoKoshka [18]
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H-2 has one more neutron so its mass number is 2
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=1.012
6 0
3 years ago
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