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Pepsi [2]
3 years ago
7

Nora stirs one teaspoon, about 4.2 g, of sugar into her mug, which holds about 0.25 L of tea. What is the concentration of sugar

in Nora’s tea?
Chemistry
1 answer:
Reptile [31]3 years ago
7 0

Answer:

16.8 g/L.

Explanation:

Given that,

Mass of sugar, m = 4.2 g

Volume of tea, V = 0.25 L

We need to find the concentration of sugar in Nora's tea.

Here, 4.2 g is the mass of solute and 0.25 L is volume of the solution.

We know that,

\text{Mass concentration}=\dfrac{\text{Mass of solute}}{\text{Volume of solution}}\\\\C=\dfrac{4.2\ g}{0.25\ L}\\\\C=16.8\ g/L

So, the concentration of sugar is 16.8 g/L.

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True or false <br> The sodium atom becomes a sodium ion with a charge of +1
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Answer:

True

Explanation:

The sodium atom does become a sodium ion with a charge of +1.

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2 years ago
How many grams of glucose are needed to prepare 400. g of a 2.00% (m/m) glucose solution g?
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The grams   of glucose  are  needed  to  prepare  400g  of  a 2.00%(m/m)  glucose  solution  g  is  calculated  as  below

=% m/m =mass  of the solute/mass  of  the  solution  x100

let mass of   solute  be represented  by  y
mass  of solution = 400 g
 % (m/m) = 2% = 2/100

 grams  of  glucose  is  therefore =2/100 =  y/400
by cross  multiplication

100y = 800
divide   both side  by  100

y= 8.0 grams



5 0
3 years ago
Convert 22.5 grams H2O to moles​
kenny6666 [7]

Answer:

18.01528

Explanation:

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4 0
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3 years ago
Predict the empirical formula of these compounds. a. C2N2. b. P4O10. c. N2O5. d. NaCl. e. C9H20. f. B2H6. g. K2Cr2O7. h. Al2Br6.
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The empirical formula is the simplest form of the formula expressed in the lowest ratio. In this case, we just have to divide each subscript by the greatest common factor. Hence.
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