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Korolek [52]
2 years ago
15

Using the periodic table, choose the more reactive nonmetal. Br or As

Chemistry
2 answers:
Hatshy [7]2 years ago
6 0

Answer:

bromine is more reactive non-metal.

Explanation:

Both the elements have to gain 1 electron but the size of bromine is less than the size of astatine. And therefore, the tendency of accepting an electron by bromine is more than the tendency of astatine. Hence, bromine is more reactive non-metal.

GaryK [48]2 years ago
6 0

Answer:

bromine is more reactive non-metal.

Explanation:

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3. When two atoms of 2H (deuterium) are fused to form one atom of 4He (helium), the total energy evolved is 3.83 × 10-12 joules.
balandron [24]
3.
∆E = ∆m x c ² ∆m = E / c ² ∆m = 3,83•10^-12 / 3•10^8 ² ∆m = 4,256•10^-29 kg

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3 years ago
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What is the pH of a solution with [H+]=7.0 * 10^-2
erastova [34]

Answer:

1.15

Explanation: I hope my calculations are correct

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3 years ago
True or False? If friction didn’t exist, an object in motion would stay in motion forever.
nata0808 [166]

Answer:

True

Explanation:

Friction is defined as the force that opposes motion when an object is sliding over a surface.

As a result of friction, all objects moving over a surface eventually come to rest over time.If we were to successfully create a friction-less surface, an object will remain in motion forever because it will encounter no opposition to its motion.

Hence, the resistance to the motion of objects over  a surface which causes the objects to come to a halt after moving over the surface for some time is called friction.

5 0
3 years ago
How do freeze-thaw cycles cause weathering?
natta225 [31]

Answer:

A. When water moves into a crack and freezes, it expands and forces the crack wider.

Explanation:

A crack in a rock can fill with water which then freezes as the temperature drops. As the ice expands, it pushes the crack apart, making the crack larger. When the temperature rises again, the ice melts, and the water fills the newer parts of the crack. Once the water freezes again when the temperature drops, the expansion of the ice causes further expansion to the crack.

8 0
2 years ago
Reaction container holds 5.77g of P4 and 5.77g of O2. The following reaction occurs:
Colt1911 [192]

Answer:

a. O₂ is limiting reactant

b. 5.68g P₄O₁₀ are produced

c. 5.83g P₄O₆ are left in the reaction container

Explanation:

Based in the first reaction,

P₄ + 3O₂ → P₄O₆

<em>1 mole of P₄ reacts with 3 moles of oxygen</em>

Initial moles of P₄ and O₂ are:

<em>Moles P₄ (Molar mass: 124g/mol): </em>

5.77g P₄ * (1mol / 124g) = 0.0465 moles P₄

<em>Moles O₂ (32g/mol):</em>

5.77g O₂ * (1mol / 32g) = 0.180 moles O₂

For a complete reaction of 0.0465 moles P₄ are required:

0.0465 moles P₄ * (3 moles O₂ / 1 mol P₄) = 0.140 moles of O₂

<em>That means will remain 0.040 moles of O₂ and there are produced 0.0465 moles of P₄O₆</em>

<em />

For the second reaction:

P₄O₆ + 2O₂ → P₄O₁₀

<em>2 moles of oxygen reacts per mole of P₄O₆</em>

For a complete reaction of P₄O₆ are required:

<em />

0.0465 moles P₄O₆ * (2 moles O₂ / 1mol P₄O₆) = 0.093 moles of O₂. As there are just 0.040 moles of O₂,

<h3>a. O₂ is limiting reactant</h3><h3 />

b. There are produced:

0.040 moles O₂ * (1 mole P₄O₁₀ / 2 moles O₂) = 0.020 moles P₄O₁₀

In mass (Molar mass: 284g/mol):

0.020 moles * (284g / mol) =

<h3>5.68g P₄O₁₀ are produced</h3>

c. Also, 0.020 moles P₄O₆ are reacting and will remain:

0.0465 mol - 0.020 mol = 0.0265 moles P₄O₆

In mass (Molar mass: 220g/mol):

0.0265 moles P₄O₆ * (220g / mol) =

<h3>5.83g P₄O₆ is left in the reaction container</h3>
4 0
2 years ago
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