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klasskru [66]
3 years ago
10

Select all that apply. A beta particle:

Chemistry
2 answers:
qwelly [4]3 years ago
8 0
In quantum matter, all things in the world are made up of even smaller particles than the atom. These are called the subatomic particles: neutron, proton and electron. A beta particle is simply an electron. It is an electromagnetic particle or wave. Electromagnetic particles are high-energy particles that are emitted by the atom during radioactive decay. Since it is an electron, its charge must be -1 and it must come from outside the nucleus of the atom. From the choices, the answers would be:

<span>is electromagnetic energy 
</span><span>has a -1 charge</span>
jekas [21]3 years ago
8 0
<span>It is an electron

</span><span>It is emitted from the nucleus

Has a -1 charge

It is these three options. Took a test and it is correct, hope it helps. 
</span>
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Why are supergiant so bright?
Yuliya22 [10]

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Use the molar bond enthalpy data in the table to estimate the value of Δ∘rxn
MakcuM [25]

Answer:

ΔH°rxn = - 433.1 KJ/mol

Explanation:

  • CH4(g) + 4Cl2(g) → CCl4(g) + 4HCl(g)

⇒ ΔH°rxn = 4ΔH°HCl(g) + ΔH°CCl4(g) - 4ΔH°Cl2(g) - ΔH°CH4(g)

∴ ΔH°Cl2(g) = 0 KJ/mol.....pure element in its reference state

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∴ ΔH°HCl(g) = - 92.3 KJ/mol

∴ ΔH°CH4(g) = - 74.8 KJ/mol

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4 0
3 years ago
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A balloon is filled with 0.250 mole of air at 35°C. If the volume of the balloon is 6.23 liters, what is the absolute pressure o
ruslelena [56]

Answer:

102.807 kPa

Explanation:

There are some assumptions to be made in the answer. The air inside the balloon acts as an ideal gas at a given temperature conditions.

Using the combined ideal gas equation.

PV = nRT\\

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n= moles of gas(air). (0.250 mol)

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T= Temperature in Kelvin

T= 35 + 273.15 = 308.15 K

So, P = \frac{nRT}{V}

P = \frac{0.250 * 8.314 * 308.15}{6.23 * 10^{-3} }

P= 102.807 * 10³ Pa

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Answer:true

Explanation:

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