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3 years ago

Please help with my chemistry! PLEASE

Chemistry

1 answer:

Dahasolnce [82]3 years ago

4 0

Answer:

Explanation:

Americium decays to neptunium 237.

An alpha particle has 2 protons and 2 neutrons, so 4 helium atoms.

241-4=237

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Please help with this. Thank you

frozen [14]

Answer:

There are four lava flows which are known as, Pahoehoe lava flow, Aa lava flow, Blocky lava flow, and also Pillow lava flow. For basaltic lava flows 10-15 minutes to be thick enough to walk on, when others can take up to 7 months.

Explanation:

6 0

3 years ago

26.8 moles of argon contain how many atoms?

stepladder [879]

Answer:

the answers is A

Explanation:

4 0

4 years ago

What is the half life of an atom that goes from 16000 g to 125 g in 163.24 days.

Alenkinab [10]

Answer:

$23.32\ \text{days}$

Explanation:

N = Final mass of atom = 125 g

$N_0$ = Initial mass of atom = 16000 g

t = Time taken = 163.24 days

$t_{1/2}$ = Half life

We have the relation

$N=N_0\dfrac{1}{2}^{\dfrac{t}{t_{1/2}}}\\\Rightarrow 125=16000\times \dfrac{1}{2}^{\dfrac{163.24}{t_{1/2}}}\\\Rightarrow \dfrac{125}{16000}=\dfrac{1}{2}^{\dfrac{163.24}{t_{1/2}}}\\\Rightarrow \ln0.0078125=\dfrac{163.24}{t_{1/2}}\ln0.5\\\Rightarrow t_{1/2}=\dfrac{163.24\times\ln0.5}{\ln0.0078125}\\\Rightarrow t_{1/2}=23.32\ \text{days}$

The half life of the atom is $23.32\ \text{days}$ .

3 0

3 years ago

what pressure will be needed to reduce the volume of 77.4 l of helium at 98.0 kpa to a volume of 60.0 l? 76 kpa 126 kpa

nekit [7.7K]

The system follow the Boyle's Law:

$P_1\cdot V_1 = P_2\cdot V_2\ \to\ P_2 = \frac{P_1\cdot V_1}{V_2} = \frac{98\ kPa\cdot 77.4\ L}{60.0\ L} = \bf 126.4\ kPa$

6 0

3 years ago

Under what conditions do you expect hydrogen gas to deviate from ideal gas behavior? Explain your answer.

Ostrovityanka [42]

Hydrogen is a non-polar gas with very weak intermolecular forces of attraction. Hydrogen will deviate from the ideal gas behavior at high pressure.

4 0

3 years ago