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Irina-Kira [14]
2 years ago
12

How many moles are there in 15.0 grams of SiO2

Chemistry
2 answers:
earnstyle [38]2 years ago
8 0

Answer:

0.25 M

Explanation:

There is 60.0843 G of SiO2 per M making 15 g equal roughly 0.25

Vinvika [58]2 years ago
7 0

n(mole)=mass: MM(molar mass)

n = 15 : 60

n = 0.25

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Answer:

2.5

Explanation:

The given costs for the purchase and delivery of the cupcakes are;

The cost of 10 cupcakes and the delivery fee = $30

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Let 'c' represent the fixed cost of delivery of the cup cakes, and let 'x' represent the cost of each cup cake, we have;

30 = 10·x + c...(1)

67.50 = 25·x + c...(2)

Subtracting equation (1) from equation (2) gives;

67.50 - 30 = 37.50 = 25·x - 10·x + c - c = 15·x

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8 0
2 years ago
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1.874 M.

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<em />

M = (no. of moles of solute)/(V of the solution (L)).

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7 0
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r-ruslan [8.4K]

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3 years ago
What is the name of the polyatomic ion in the compound na2o2?
EastWind [94]
Sodium peroxide is the answer!
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3 years ago
SEP Construct Explanations: Food contains chemical potential energy that the body uses. How do you think that the body gains thi
beks73 [17]

Answer:

Through oxidation of food materials

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