10 months ago

Which of the following measurements have four significant figures? Select all that apply. A.1,001g B.120.0mL C.0.0007cm D.5,000s

Chemistry

1 answer:

Wittaler [7]10 months ago

6 0

Answer:

The answer(s) will be A and B

Explanation:

Hope this helps and may God bless you<3

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Determine the average atomic mass of the following mixture of isotopes of Potassium:

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Explanation:

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An elastic cord can be stretched to its elastic limit by a load of 2N.If a 35cm length of the cord is extended 0.6cm by a force

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Explanation:

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For many purposes we can treat ammonia NH3 as an ideal gas at temperatures above its boiling point of −33.°C. Suppose the temper

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Answer:

The new pressure will be 0.225 kPa.

Explanation:

Applying combined gas law:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1\text{ and }V_1$ are initial pressure and volume at initial temperature $T_1$ .

$P_2\text{ and }V_2$ are final pressure and volume at initial temperature $T_2$ .

We are given:

$P_1=0.29 kPa\\V_1=V\\P_2=?\\V_2=V+50\% of V=1.5 V$

$T_1=-25^oC=248.15 K$

$T _2 = 16^oC=289.15 K$

Putting values in above equation, we get:

$\frac{0.29 kPa\times V}{248.15 K}=\frac{P_2\times 1.5V}{289.15 K}$

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3 years ago

How much time would it take for 5.2 x 10^5 atoms of fermium-253 (half-life 3 days) to decay to 6.5 x 104 atoms?

Jlenok [28]

Answer:

9 days, or 3 half-lives

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5.2x10^5=520000

6.5x10^4=65000

65000/520000=1/8, or 3 half-lives

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I'm not the greatest at Chem but this seems more like math than Chem :)

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