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il63 [147K]
3 years ago
6

What is mass in g of 15.5 moles of calcium?

Chemistry
1 answer:
padilas [110]3 years ago
4 0

Answer:

621.2090000000001 grams

Explanation:

1 moles Calcium to grams = 40.078 grams

15.5*40.078 = 621.2090000000001 g

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d- Scientists have to follow government rules made to protect people.

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3 years ago
Last question<br> help<br> im confusion
Andrej [43]

Remark

The given thing on the right is a positron. The mass for these subatomic particles is considered to be 0. It's atomic number is 1 which means it is a blood relative of a proton.

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5 0
3 years ago
What is the wavelength of a 2500 kg truck traveling at a rate of 75km/h?
Pepsi [2]

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v = speed of the truck traveling = 75 km/h = 75 (km/h) (1000 m/ 1 km) (1 h /3600 sec) = 20.83 m/s

h = plank's constant = 6.63 x 10⁻³⁴

λ = wavelength of truck = ?

according to de broglie's principle, wavelength of truck is given as

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inserting the values in the above equation

λ = (6.63 x 10⁻³⁴)/((2500) (20.83))

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Answer:

The correct answer is A)

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The finches beaks adapted to the food source which was favored by natural selection. The successful finches that had the most useful beak for their island survived and therefore reproduced.

Cheers!

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Answer:

A

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