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3 years ago

Five more than two times the square root of a number is fifteen. What’s the number

Chemistry

2 answers:

ryzh [129]3 years ago

7 0

The number is 25. The square root of 25 is 5 and 5x2 is 10 and then 10+5 is 15

UkoKoshka [18]3 years ago

5 0

I think it may be 3 I’m not sure

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What might be useful for adding solids to a tube

vagabundo [1.1K]

C funnel because the funnel would have a large enough entrance to put a solid through

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3 years ago

In your second paragraph, describe properties of sound waves. Then make a claim about how loud an explosion in space should be.

morpeh [17]

Answer:

Here are five important characteristics: wavelength, amplitude, frequency, time period, and velocity. The wavelength of a sound wave can tell the distance that wave travels before it repeats itself. The wavelength itself is a longitudinal wave that show compression and rarefactions of sound waves.

Explanation:

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3 years ago

How many moles of hypomanganous acid. H3 MnO4, are contained in 22.912 g?

gregori [183]

Answer:

0.188mol

Explanation:

Using the formula;

mole = mass/molar mass

Molar mass of hypomanganous acid. (H3MnO4) = 1(3) + 55 + 16(4)

= 3 + 55 + 64

= 122g/mol

According to this question, there are 22.912g of H3MnO4

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mole = 0.188mol

6 0

3 years ago

How many cm in 725 km?

tigry1 [53]

1 km is equal to 100,000 cm
$725km \times 100000cm \\ = 72500000 \: km .cm$
and you need to divide it to 1 km so that you can get rid of the km.
$= 72500000cm$

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3 years ago

How much calcium can be recovered from 75.0g of calcium fluoride

7nadin3 [17]

38.46g

Explanation:

Given parameters:

Mass of CaF₂ = 75.0g

Unknown:

Mass of calcium that can be recovered = ?

Solution:

This is a mass percentage problem and we need to solve it accordingly.

To solve this problem;

Find the molar mass of CaF₂

Find the ratio between the molar mass of Ca and that of CaF₂

Multiply by the given mass

Molar mass of CaF₂ = 40 + (2 x 19) = 78g/mol

Mass of calcium = $\frac{40}{78}$ x 75 = 38.46g

learn more:

Mass percentage brainly.com/question/8170905

#learnwithBrainly

3 0

3 years ago