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Elan Coil [88]
4 years ago
7

Which of the following equations is balanced?

Chemistry
1 answer:
Nikitich [7]4 years ago
5 0
Not really sure abot the answer but it seems like
D is the answer
one more time im not really sure
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A 2.600×10−2 M solution of glycerol (C3H8O3) in water is at 20.0∘C. The sample was created by dissolving a sample of C3H8O3 in w
sesenic [268]

Answer:

A. 0.2395 w/w %

B. 2394ppm

Explanation:

A. To find concentrationin percent by mass of the solution we need to calculate mass of glycerol and mass of water. The formula is:

Mass glycerol / Total mass * 100

<em>Mass glycerol:</em>

The solution is 2.6x10⁻²moles / L. As there is 1L of solution there are 2.6x10⁻² moles of glycerol. In mass (Using molar mass glycerol: 92.09g/mol):

2.6x10⁻² moles of glycerol * (92.09g / mol) = 2.394g glycerol

<em>Mass of water:</em>

998.9mL and density = 0.9982g/mL:

998.9mL * (0.9982g/mL) = 997.1g of water.

That means percent by mass is:

% by mass: 2.394g / (997.1g + 2.394g) * 100 = 0.2395 w/w %

B. Parts per million are mg of glycerol per L of solution. As in 1L there are 2.394g. In mg:

2.394g * (1000mg / 1g) = 2394mg:

Parts per million: 2394mg / L = 2394ppm

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3 years ago
What is the value of R in the ideal gas law?
dybincka [34]
It’s option B 0.0821L.atm/mol.K
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The reaction CO2+H2O=H2OCO3 is classified as
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It would be classified as decomposition reaction
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padilas [110]
Lol now way he answers this
8 0
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At equilibrium, no chemical reactions take place. true or false
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False. At equilibrium, the rate of forward reaction is equal to the rate of backward reaction. The net concentration of both products and reactants won't change, but the reactions still take place.
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