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eduard
3 years ago
11

PLEASE HELP ME!!! NEED THE ANSWER FAST! WILL CHOOSE THE BRAINLIEST!!!

Chemistry
1 answer:
Vlad [161]3 years ago
8 0
Remember that a cation will be smaller than its neutral atom, and an anion will be larger than its neutral atom. This would automatically eliminate answer choices A and D.

Also keep in mind that atomic radii decreases from left to right as you move along a periodic table. It also decreases from bottom up. 
Atomic radii increases as you move from right to left and as you go from up to down.

As bromine is higher up in the periodic table than Iodine, it would have a smaller radius. Iodine would have a larger radius.

The correct answer is B. Br
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In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions)
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Answer:

RbI<RbBr<RbCl<RbF

Explanation:

As stated in the question, the latice energy depends on the relative size of the ions. When the action size is constant as in the question, the lattice energy now depends on the relative of the anions. The order of increase in ionic sizes among the halide ions is fluoride<Chloride<Bromide<Iodide. This order of increasing size means that the lattice energy will decrease accordingly as shown in the answer.

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3 years ago
In a hydrogen molecule, the two hydrogen atoms are held together by a single bond with a bond energy of 436 kj/mol of hydrogen.
svetoff [14.1K]

Answer: 873 kJ of energy will be required to break two moles of hydrogen gas.

2H_2+O_2\rightarrow 2H_2O

Above chemical equation shows that two moles of hydrogen gas is reacting with one mole of oxygen gas to give two mole of water molecule.

Bond energy of H-H = 436kJ

According to reaction we have two moles hydrogen,so energy required to break the

H-H bond in two moles of hydrogen gas will be:

2\times \text{bond energy of H-H bond}

2\times {436} = 872kJ

872kJ of energy will be required to break H-H bond in two moles of hydrogen gas.




5 0
4 years ago
Read 2 more answers
What is the outcome of all chemical changes when two substances are combined?
hodyreva [135]

Answer:

Producing a new substance

Explanation:

A change in matter that produces a new substance.

6 0
4 years ago
Approximately how many mineral species have scientists identified?
nekit [7.7K]
I think it’s 5000 because it says that their is over 4,124 valid species of minerals.
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3 years ago
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In the manufacture of nitric acid by the oxidation of ammonia, the first product is nitric oxide. The nitric oxide is then oxidi
swat32

Answer:

F

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simple subtration

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