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julia-pushkina [17]
3 years ago
8

When using the absolute method to assess muscular endurance, you should adjust the weight according to each individual's strengt

h ability.
Please select the best answer from the choices provided.

T
F
Chemistry
2 answers:
aalyn [17]3 years ago
6 0
It’s true!!!!!!!!!!!
Ghella [55]3 years ago
3 0
I’m pretty sure it’s true I’m not 100% sure tho
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Identify the compound with the highest magnitude of lattice energy. Identify the compound with the highest magnitude of lattice
Galina-37 [17]

Answer: Option (c) is the correct answer.

Explanation:

According to the Born-Lande equation,

          E = \frac{N_{A}Mz^{+}z^{-}e^{2}}{4 \pi \epsilin_{o} r}

where,   N_{A} = Avogadro's constant

                    r = distance between the anion and cation

                   M = Medlung constant

           z^{+} = charge on the cation

           z^{-} = charge on the anion

                  E = lattice energy

According to this expression, lattice energy is inversely proportional to the distance between the cation and anion. And, when we move down a group then there occurs an increase in the atomic radii of the atoms.

As a result, there will occur a decrease in their lattice energy. Since, the anionic part is same in all the given species but the cationic part is different.

In MgBr_{2} the size of magnesium cation is smaller than calcium, barium and strontium ion. Hence, there will be least distance between Mg and Br ions.

Thus, we can conclude that the magnitude of lattice energy will be the highest in MgBr_{2}.

4 0
3 years ago
Which of the following is true regarding the speed of earthquake waves?
tankabanditka [31]
Surface waves arrive at a seismograph first because they are not impeded by rocks
7 0
3 years ago
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Which reaction is the opposite of a decomposition reaction?
tresset_1 [31]

Answer:

B) Synthesis reaction

Explanation:

synthesis reactions because they take apart larger molecules or compounds

Hope that helps

5 0
3 years ago
Calculate the mass in grams of iodine (i 2 ) that will react completely with 20.4 g of aluminum (al) to form aluminum iodide (al
garik1379 [7]
3I₂ + 2Al → 2AlI₃

m(I₂)=3M(I₂)m(Al)/{2M(Al)}

m(I₂)=3*253.8*20.4/{2*27.0}=287.64 g
8 0
3 years ago
In a covalent bond, the electrons are _____
Ivenika [448]

Explanation:

In a covalent bond the electrons are simultaneously attracted by the two atomic nuclei.

6 0
2 years ago
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