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3 years ago

Which of the following is not the same as 12.5 millimeters? 0.0000125 km 0.00125 hm 0.0125 m 1.25 cm

1 answer:

5 0

1 mm (millimeter) = 0.000001 km (kilometer)
12.5 mm = 0.0000125 km

1 mm = 0.00001 hm (hectometer)
12.5 mm = 0.000125 hm

1 mm = 0.001 m (meter)
12.5 mm = 0.0125 m

1 mm = 0.1 cm (centimeter)
12.5 mm = 1.25 cm

So the only one of the answer choices that doesn't equal 12.5 mm is 0.00125 hm, since 12.5 mm is 0.000125 hm.

Answer:
0.00125 hm

Hope this helps!

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5. A gas has a pressure of 310 kPa at 237 degrees C. What will its pressure be at 23 degrees C?)

slavikrds [6]

Answer:

The pressure of the gas at 23 C is 179.92 kPa.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases.

Gay-Lussac's law can be expressed mathematically as follows:

$\frac{P}{T} =k$

Studying two states, one initial 1 and the other final 2, it is satisfied:

$\frac{P1}{T1} =\frac{P2}{T2}$

In this case:

P1= 310 kPa
T1= 237 C= 510 K (being 0 C= 273 K)
P2= ?
T2= 23 C= 296 K

Replacing:

$\frac{310 kPa}{510 K} =\frac{P2}{296 K}$

Solving:

$P2=296 K*\frac{310 kPa}{510 K}$

P2= 179.92 kPa

The pressure of the gas at 23 C is 179.92 kPa.

5 0

3 years ago

How many moles are there in 87.2 g of zinc fluoride?

Sladkaya [172]

Answer:

what I got was 0.8435160945347224 moles

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3 years ago

Can you please help me on my Chemistry homework.

Yanka [14]

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2 years ago

Balance the equation Ag2O ->Ag + O2

UNO [17]

Answer:

For balancing this equation 

we need to put

Ag2O. = 2 

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3 years ago

Atrial natriuretic peptide is a hormone that controls blood pressure in part by increasing the urinary excretion of sodium. True

mariarad [96]

Answer:

The answer is "true"

Explanation:

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ANP's main function decreases the amount of increased extracellular fluid by increasing renal excretion.
This hormone is primarily developed by cardiovascular myocytes and, emanates from the wall tension locally, that's why the given statement is true.

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3 years ago