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Stolb23 [73]
3 years ago
9

Which balanced equation represents a chemical change? A) H2O() + energy → H2O(g) B) 2H2O() + energy → 2H2(g) + O2(g) C) H2O() →

H2O(s) + energy D) H2O(g) → H2O() + energy
Chemistry
1 answer:
IgorC [24]3 years ago
5 0
Although your question is incomplete, I believe 'B' is the answer, as the Oxygen separates from the Hydrogen
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Calculate the number of moles of H2 produced in the reaction of Mg(s) with HCl(aq). Mg(s) is the
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Explanation:

Moles of metal,

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Moles of

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Clearly, the acid is in deficiency ; i.e. it is the limiting reagent, because the equation above specifies that that 2 equiv of HCl are required for each equiv of metal.

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⋅

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.

If 1 mol dihydrogen gas occupies

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5 0
2 years ago
Identify the element with 3 energy levels and 2 valence electrons.
bixtya [17]

Answer:

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8 0
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DIA [1.3K]

Answer:

It is composed of 57.17% S and 42.83% C and has a molar mass of 448.70 g/mol. Determine the empirical and molecular formulas of “sulflower.”

...

what is the molecular formula of the compound?

Empirical formula Molar mass (g/mol) Molecular formula

CHO 116.1

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Explanation:

Hope this helps

8 0
3 years ago
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telo118 [61]
In a dilute acid solution most if not all of the molecules will split into ions.
For example HCl is a strong acid and 100% of the molecules will split into
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4 0
3 years ago
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What is the frequency of a light that has a wavelength of 3.0 x 10 -7m?
alexdok [17]

Answer:

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Explanation:

Given Data:

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Frequency of light: to be calculated

Formula Used to find frequency:

                                  f = V/λ ........................... (1)

where

f is the frequency

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Velocity of light = 3 x 10⁸ ms⁻¹

put the values in equation (1)

                                     f =  3 x 10⁸ ms⁻¹ / 3.0 x10⁻⁷m

                                     f = 1 x 10¹⁵s⁻¹

   So the frequency of light =  1 x 10¹⁵s⁻¹

7 0
3 years ago
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