Using the periodic table, choose the more reactive non-metal. At or Br

1 answer:

3 0

Bromine (Br) it's closer to the top right corner, which are the most reactive elements on the right side of the periodic table.

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Refer to the balanced equation. (PLEASE HELP QUICK)

kolezko [41]

Answer: C) $5.12\times 10^1$ L $Cl_2$

Explanation: $8H_2S+8Cl_2\rightarrow S_8+16HCl$

According to Avogadro's law, 1 mole of every gas occupies 22.4 Liters at STP.

Thus from the balanced chemical equation, 8 moles of hydrogen sulfide reacts with 8 moles of chlorine gas.

i.e 8 moles of hydrogen sulfide reacts with $=8\times 22.4L=179.2L$ of chlorine gas.

2.28 moles of hydrogen sulfide reacts with $=\frac{179.2}{8}\times 2.28=51.2L=5.12\times 10^1L$ of chlorine gas.

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Answer: A. Six-Sided Ring

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An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the

iren [92.7K]

The atom has 7 neutrons and 8 protons....

because the positively charged particles are the protons ...and 8 is also the atomic number ...so number of neutrons can be calculated by subtracting atomic number from the mass number...which gives us the neutrons 7 ...

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3.5 liters of 0.4M HCI

nignag [31]

Answer: 1.4 moles

Explanation:

I can only assume you are looking for the amount of moles in 0.4M. the capital M means Molarity.

Molarity=moles of solute/liters of solution

Since we know the molarity is 0.4, we can plug this into our equation

$0.4M=\frac{xmoles}{3.5L}$