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3 years ago

15

What pressure is required to reduce 57 mL of

1 answer:

AfilCa [17]3 years ago

8 0

At 45.35 c cause of how you multiply the division

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After 42 days a 2.0 g sample of phosphorus-32 contains only 0.25 g of the isotope. What is the half-life of phosphorus-32?

bija089 [108]

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3 and a half lives = 42 days

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A student uses a lever and fulcrum to lift a rock off the ground.

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3 years ago

A gas at constant pressure occupies 0.400 L at 50.0°C. What volume will it have at 300.°C? If you could show work that would rea

DaniilM [7]

This can be solved using the Combined Gas Law. The formula for that is

$\frac{P_{1} V_{1} }{T_{1} } = \frac{P_{2} V_{2} }{T_{2} }$

Let's go ahead and fill in our known values. Since pressure remains the same, it doesn't matter what number we use, so let's assume 1 atm on both sides. For temperature, remember to convert it to Kelvin first (K = C + 273).

$\frac{(1 atm) (0.400 L)}{(323 K)} = \frac{(1 atm) (x L)}{(573 K)}$

Go ahead and simplify both sides.

0.001238 = $\frac{(x L)}{(573 K)}$

Multiply both sides by 573.

0.7095 = x L

So, at 300° C, your gas will occupy 0.7095 L.

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3 years ago

While looking at calcium (Ca) on the periodic table, a student needs to find an element with a greater atomic mass in the same p

Dmitry_Shevchenko [17]

Answer:directly to the right

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Atomic size increases from left to right

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