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Alecsey [184]
2 years ago
9

HELP PLEASEEEE The speed of a motorcycle increases from 10 m/s to 50 m/s in 9 seconds. What is its acceleration? *

Chemistry
1 answer:
lyudmila [28]2 years ago
3 0

Answer:

4.444... m/s

Explanation:

Because it increases by 40 m/s in 9 seconds so 40/9= 4.444... m/s

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▹ Answer

<em>x¹⁰z¹⁵</em>

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x¹²z¹¹/x²z⁴

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5 0
3 years ago
Calculate the number of moles of caco3 (calcium carbonate, or limestone) in a 20.0g sample of this substance
Brrunno [24]
First calculate for the molar mass of the given formula unit, CaCO₃. This can be done by adding up the product when the number of atom is multiplied to its individual molar mass as shown below.

     molar mass of CaCO₃ = (1 mol Ca)(40 g Ca/mol Ca) + (1 mol C)(12 g of C/1 mol of C) + (3 mols of O)(16 g O/1 mol O) = 100 g/mol of CaCO₃

Then, divide the given amount of substance by the calculated molar mass.
            number of moles = (20 g)(1 mol of CaCO₃/100 g)
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<em>Answer: 0.2 moles</em>
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(A) Gamma waves have the highest energy

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