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3 years ago

7

What does frequency describe? A.distance from crest to crest or from trough to trough on a wave B.Number of waves that pass a gi

ven point in a given time C. height of a wave D. depth of a wave

1 answer:

Shalnov [3]3 years ago

3 0

Answer:

B.Number of waves that pass a given point in a given time.

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Help with this question I got so confused 30 points

frutty [35]

Answer:

B:the second answer

Explanation:

Because the all have leaves

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How many atoms are there in each of the following ?a.)1.50 mol Na c.) 0.250 mol. Sib.)6.755 mol Pb

tamaranim1 [39]

$a) \: n = \frac{N}{NA} \\ 1.5 = \frac{x}{6.02 \times \: {10}^{23} } \\ x = 1.5 \times 6.02 \times {10}^{23} \\ x = 9.03 \times {10}^{23} \: atoms \: of \: Na$

$b) \: n = \frac{N}{NA} \\ 0.25 = \frac{x}{6.02 \times \: {10}^{23} } \\ x = 0.25 \times 6.02 \times {10}^{23} \\ x = 1.505 \times {10}^{23} \: atoms \: of \: Si \:$
$c) \: n = \frac{N}{NA} \\ 6.755 = \frac{x}{6.02 \times \: {10}^{23} } \\ x = 6.755 \times 6.02 \times {10}^{23} \\ x = 40,6651 \times {10}^{23} \\ x = 4.07 \times {10}^{24} \: atoms \: of \: Pb \:$

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3 years ago

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zheka24 [161]

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B

Explanation:

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3 years ago

An element's atomic number is 65. How many protons would an atom of this element have?

KIM [24]

65. The atomic number is the number of protons in the atom.

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3 years ago

A compound has the formula C8H8 and does not contain any double or triple bonds. All the carbon atoms are chemically identical a

Ann [662]

Answer:

<h3>There's no way for C8H8 to exist without double bonds. To fulfill the rule of the octet, four bonds must be formed by each carbon. This can only be done in C8H8 through the formation of double bonds.</h3>

Explanation:

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4 years ago