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dexar [7]
3 years ago
9

If an unshielded sample of radioactive material emits alpha particles, what effect will it have on a person sitting in the next

room? (Assume the wall between rooms is composed of concrete.)
Chemistry
2 answers:
Flauer [41]3 years ago
7 0
Alpha radiation can only travel a few centi-metres in air and can be stopped (or absorbed) by a sheet of paper. Alpha particles can only penetrate a very thin sheet of paper and is totally blocked by the concrete. As these particles move through the air, it loses energy from the collisions with air molecules making it less penetrating.<span>
 
On the other hand:
Beta radiation can travel a bit further, around tens of centi-metres in air so a thicker substance is required to absorb the radiation. It can be stopped by a thin sheet of aluminium.

Gamma radiation however can travel for many meters so it requires a material much thicker to absorb it.</span>
o-na [289]3 years ago
5 0

Answer:

None, because the wall will block the radiation.

Explanation:

on edge

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Plants obtain energy from the sun during photosynthesis and pass it along the food chain.

<h3>What is a model?</h3>

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3 0
2 years ago
Using the Hoffman apparatus for electrolysis, a chemist decomposes 2.3 moles of water into its gaseous elements. How many grams
solong [7]

Answer:

2.318032g

Explanation:

-The electrolysis equation of water is written as below:

2H_2O_{(l)}->2H_2_{(g)}+O_2_{(g)}

-The mole ratio of Water to the hydrogen formed is 1:1, therefore 2.3 moles of hydrogen gas is produced.

-Hydrogen's molar mass is 1.00784 grams:

Mass=moles\times molar \ mass\\\\\=2.3\times 1.00784\\\\=2.318032\ g

Hence, 2.318032 grams of hydrogen is produced.

7 0
3 years ago
For the reaction 2A(g) â B(g), the equilibrium constant is Kp = 0.76. A reaction mixture initially contains 4.0 atm of gas (PA =
timofeeve [1]

Answer: (a) The reaction mixture will proceed toward products.

Explanation:

Equilibrium constant is defined as the ratio of pressure of products to the pressure of reactants each raised to the power their stoichiometric ratios. It is expressed as K_p

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

2A(g)\rightleftharpoons B(g)

The expression for Q_p is written as:

Q_p=\frac{p_B}{(p_A)^2}

Q_p=\frac{(2.0)}{(2.0)^2}

Q_p=0.5

K_p=0.76

Thus as K_p>Q_p , the reaction will shift towards the right i.e. towards the product side.

7 0
3 years ago
Stock naming please help
andre [41]

Answer:

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8 0
2 years ago
How many moles are in 124.0 grams of sodium hydroxide, NaOH (Molar Mass of 40.0 g/mol)
Setler [38]

Answer:

a

Explanation:

a

7 0
3 years ago
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