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Gwar [14]
4 years ago
9

How many block shells are the d block and the f block​

Chemistry
1 answer:
HACTEHA [7]4 years ago
4 0

Answer:

1s, 3p, 5d, 7f

Explanation:

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If 9.5 atms of pressure were increased to 25 atms of pressure, what would be the final volume
nordsb [41]

Answer:

The final volume of the gas is 36.1 L.

Explanation:

Given:

Initial pressure of the gas is, P_1=9.5\ atm

Final pressure of the gas is, P_2=25\ atm

Initial volume of the gas is, V_1=95\ L

Final volume of the gas is, V_2=?

Here, we shall use Boyle's Law which states that for a process under constant temperature, the pressure of the gas changes inversely with the change in volume.

Here, the pressure is increased. So, the volume of the gas is decreased.

Therefore, as per Boyle's Law:

P_1V_1=P_2V_2\\9.5\times 95=25V_2\\902.5=25V_2\\V_2=\frac{902.5}{25}\\V_2=36.1\ L

So, the final volume of the gas is 36.1 L.

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3 years ago
Recycled r134a refrigerant cannot exceed what levels of contaminants
Contact [7]
Answer is:
1) lubricant - 500 ppm by weight.
2) moisture - 50 ppm by weight.
3) non-condensable gases (air) - 150 ppm by weight.
Standard J2099 specific the maximum levels of contaminants for R134a.
ppm<span> (parts-per-million, </span>10⁻⁶) is <span>value that represents the part of a whole number in units of 1/1000000.</span>
7 0
3 years ago
The experimental procedure has you wash your thermometer and dry it after you measure the temperature of the acid and base solut
trapecia [35]

If you don't wash the thermometer, residual NaOH will react with the HCl solution. This is a highly exothermic reaction and will change the temperature of the solution, and thus throw off your measurement.

4 0
3 years ago
Fossil evidence sssssssssssssssssssssss
IRINA_888 [86]

Answer:

Fossils are essentially clues that have been left behind by various forms of living things. They are instrumental tools for understanding the diverse groups of organisms that have inhabited our planet at one time or another. A fossil is any preserved evidence of an organism.

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Explanation:

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3 years ago
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The boiling point of an aqueous solution is 101.54 ∘C. What is the freezing point
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Answer:

101.54 .C.

Explanation:

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