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dexar [7]
3 years ago
9

Which of the following is a characteristic of the sun's radiation?

Chemistry
2 answers:
astra-53 [7]3 years ago
3 0

Answer:

it is made up of rays of varying frequencies

GarryVolchara [31]3 years ago
3 0
It is made up of rays of the same wavelength
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The process that splits rock through freezing and thawing is called?
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It's called Ice Wedging :)
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6. The boys _____ their bags, tied their shoes tight, and started off down the trail. A. readjustment B. adjusted C. adjust D. a
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3 years ago
The half life of a new isotope found on Mars is 2 years. It takes 10 years to get the sample back to Earth. If the astronauts st
yawa3891 [41]

Answer:

3.99 g

Explanation:

The following data were obtained from the question:

Half life (t½) = 2 years.

Original amount (N₀) = 128 g

Time (t) = 10 years

Amount remaining (N) =..?

Next, we shall determine the rate of disintegration of the isotope. This can be obtained as follow:

Half life (t½) = 2 years.

Decay constant (K) =.?

K= 0.693/t½

K = 0.693/2

K = 0.3465 year¯¹.

Finally, we shall determine the amount remaining after 10 years i.e the amount remaining when they arrive on Earth. This can be obtained as follow:

Original amount (N₀) = 128 g

Time (t) = 10 years

Decay constant (K) = 0.3465 year¯¹.

Amount remaining (N) =..?

Log (N₀/N) = kt/2.3

Log (128/N) = (0.3465 × 10)/2.3

Log (128/N) = 1.5065

Take the antilog of 1.5065

128/N = Antilog (1.5065)

128/N = 32.1

Cross multiply

128 = 32.1 × N

Divide both side by 32.1

N = 128/32.1

N = 3.99 g

Therefore, the amount remaining is 3.99 g

3 0
3 years ago
How many protons are in the radioactive isotope 40/19K
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4 0
3 years ago
Read 2 more answers
The compound XCl4 contains 75.0% Cl by mass. What is the<br> element X?<br> nch of the following
krok68 [10]

The element X is titanium.

According to the question, the percentage by mass of Cl in XCl4  is 75.0%.

The percentage by mass is obtained from;

Mass of element in the compound/molar mass of compound * 100

Hence;

Let the mass of the unknown element be X

75 = 142/X + 142 * 100

75 (X + 142) = 142 * 100

75X + 10650 = 14200

75X =  14200 - 10650

X = 14200 - 10650/75

X = 47

Hence, X is titanium.

Learn more; brainly.com/question/1363167

7 0
3 years ago
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