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ExtremeBDS [4]
2 years ago
13

How many ions are in 1.50 grams of Na+?

Chemistry
1 answer:
Jobisdone [24]2 years ago
7 0

Answer:

= 0.0652 moles

Explanation:

I hope it helps you

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Energy is released as heat during the reaction.

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3 years ago
78.9 + 890.43 - 21 = 9.5 x 10^2
maria [59]

948 or 9.48 x 10^2

There are two sets of rules for significant figures

• One set for addition and subtraction

• Another set for multiplication and division

You used the set for multiplication and division.

This problem involves addition and subtraction, and the rule is

The number of places after the decimal point in the answer must be <em>no greater than the number of decimal places in every term</em> in the sum.

Thus, we have

78.9

+890.43

-21.

= 948.33

The "21" term has the fewest digits after the decimal point (none), so the answer must have no digits after the decimal point.

To the correct answer is 948 = 9.48 x 10^2. It has three significant figures.

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I need help with this question ASAP
sladkih [1.3K]

the answer is thermal.......

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