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Svetradugi [14.3K]
4 years ago
15

A science journal published a report which states that the solar activity has increased in the last two years. Which of the foll

owing events is most likely an effect of the increase in solar activity? (2 points) The auroras have decreased at the North Pole. The auroras have decreased at the South Pole. The auroras are visible at higher regions than normal. The auroras are visible at lower regions than normal.
Chemistry
2 answers:
rodikova [14]4 years ago
6 0
<span>D. The auroras are visible at lower regions than normal.</span>
kobusy [5.1K]4 years ago
6 0

Answer:

option d)

Explanation:

solar activity are the activities which effect the earth weather when there arises storms on the surface of sun.

these storms are

i) sunspot

ii) solar fare

iii) coronal mass injection

these increase in solar activity leads to form auroras at the lower region than the normal.

so, the correct answer is option d)

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Why do many parasites eventually need new hosts?
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6 0
4 years ago
A 216-L cylinder holds propane gas at 184.8 kPa of pressure and 127°C. How many moles of propane are in the cylinder?
lbvjy [14]

Answer:

12 moles of propane.

Explanation:

From the question given above, the following data were obtained:

Volume (V) = 216 L

Pressure (P) = 184.8 KPa

Temperature (T) = 127 °C

Number of mole (n) =?

Next, we shall convert 127 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

T(°C) = 127 °C

T(K) = 127 + 273

T(K) = 400 K

Finally, we shall determine the number of mole of propane gas in the container. This can be obtained as follow:

Volume (V) = 216 L

Pressure (P) = 184.8 KPa

Temperature (T) = 400 K

Gas constant (R) = 8.314 L.KPa/Kmol

Number of mole (n) =?

PV = nRT

184.8 × 216 = n × 8.314 × 400

39916.8 = n × 3325.6

Divide both side by 3325.6

n = 39916.8 / 3325.6

n = 12 moles

Thus, 12 moles of propane is present in the cylinder

8 0
3 years ago
What kind of solution would have a ka value that is much less than 1?
liberstina [14]

Answer:

D. A weakly acidic solution.

4 0
3 years ago
Which is greater? 1,000ml or 1,000 cm3
pshichka [43]
Niether, they are equal.
1,000 cm3 = 1000 mL
8 0
3 years ago
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