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alexdok [17]
3 years ago
14

What nuclide, when bombarded by an α particle, will generate carbon-12 and a neutron?

Chemistry
1 answer:
Maurinko [17]3 years ago
6 0

Answer:

Be

Explanation:

^94Be  + ^42He \rightarrow  ^{12}6C  +  ^10x

Therefore, the element symbols is Be, which when bombarded by an α particle, will generate carbon-12 and a neutron.

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What is the significance sodium hydroxide and hydrochloric acid
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Answer:

They are a base and an acid,  so they neutralize each other.

Explanation:

Sodium hydroxide is a strong base. Hydrochloric acid is a strong acid.

They react with (neutralize) each other to form a salt (sodium chloride) and water.

NaOH + HCl ⟶ NaCl + H₂O

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9. How many grams of potassium sulfate are needed to make 250 mL of a 0.150 M
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Answer:

6.53g of K₂SO₄

Explanation:

Formula of the compound is K₂SO₄

Given parameters:

Volume of K₂SO₄ = 250mL = 250 x 10⁻³L

= 0.25L

Concentration of K₂SO₄ = 0.15M or 0. 15mol/L

Unknown:

Mass of K₂SO₄ =?

Methods:

We use the mole concept to solve this kind of problem.

>>First, we find the number of moles using the expression below:

Number of moles= concentration x volume

Solving for number of moles:

Number of moles = 0.25 x 01.5

= 0.0375mole

>>Secondly, we use the number of moles to find the mass of K₂SO₄ needed. This can be obtained using the expression below:

Mass(g) = number of moles x molar mass

Solving:

To find the molar mass of K₂SO₄, we must know the atomic mass of each element in the compound. This can be obtained using the periodic table.

For:

K = 39g

S = 32g

O = 16g

Molar mass of K₂SO₄ = (39x2) + 32 + (16x4)

= 78 +32 + 64

= 174g/mol

Using the expression:

Mass(g) = number of moles x molar mass

Mass of K₂SO₄ = 0.0375 x 174 = 6.53g

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what is the log of 2.22 x 10^-3]

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Explanation:

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