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zmey [24]
3 years ago
6

Rocks discovered on the moon are similar to those found _____. near volcanoes in river beds along the grand canyon

Chemistry
1 answer:
mylen [45]3 years ago
8 0
Rocks discovered on the moon are similar to those found <span>near volcanoes. Two other options don't fit, as there's no such conditions on the moon.</span>
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What is the concentration of H+ in a 2.5 M HCl solution?
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Answer:

The concentration of H⁺ in a 2.5 M HCl solution is 2.5 M

Explanation:

As HCl is a strong acid and hence a strong electrolyte, it will dissociate as

HCl ⟶ H⁺ + Cl⁻

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Give the nuclear symbol for the isotope of gallium, ga, that contains 40 neutrons per atom. Replace the question marks with the
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The nuclear symbol of an element have three parts namely:  

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  2. mass number of the element
  3. atomic number of the element

The general representation is as:

_{Z}^{A}X

where X is the chemical symbol of the element, A is mass number of the element that is total number of neutrons and protons in the nucleus of an atom, and Z is atomic number of the element that is number of protons in the atom.

Element = Gallium, Ga    (given)

Number of neutrons = 40 (given)

Let the nuclear symbol be _{?}^{?}Ga. So, we need to determine the values of "?" in the symbol.

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Substituting the values:

Mass number = 31+40 = 71

So, the nuclear symbol is _{31}^{71}Ga.

7 0
3 years ago
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