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3 years ago

Which pair of elements will form a covalent bond?

Chemistry

2 answers:

Over [174]3 years ago

5 0

The answer is most likely carbon and sulfur since both of those are nonmetal covalent elements.

Julli [10]3 years ago

4 0

Answer: Option (b) is the correct answer.

Explanation:

A covalent bond is defined as the bond formed between the two atoms due to sharing of electrons.

A covalent bond is always formed between non-metals.

For example, carbon and sulfur are both non-metals and when they chemically combine together they form $CS_{2}$ which is a covalent compound.

Thus, we can conclude that out of the given options carbon and sulfur is the pair of elements that will form a covalent bond.

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Water has been discovered on the sunlit surface of the moon. What questions do you have about it?

Brut [27]

Answer:

In August 2018, NASA confirmed that M3 showed water ice is present on the surface at the Moon poles. Water was confirmed to be on the sunlit surface of the Moon by NASA on October 26, 2020.

Explanation:

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3 years ago

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a)Nitrous oxide gas (systematic name: dinitrogen monoxide) is used by some dental practitioners as an anesthetic. Nitrous oxide

Mama L [17]

Explanation:

Nitrous oxide or dinitrogen monoxide can be simple be prepared by the decomposition of ammonium nitrate in the following way -

<u>The reaction is as follows -</u>

NH₄NO₃ ----------------> N₂O + H₂O

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4 years ago

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1.825 gm HCl is dissolved in 250 ml solution. What is the pH of that solution? Please answer with the explanation.

dolphi86 [110]

The first step is calculating the number of HCl moles. The molar mass of HCl is AH+ACl which is 1+35,5=36,5 g/mole. The formula for the pH is -lg[H+] where [H+] is the molar concentration of protons in the solution. To find the molar concentration we need to divide the number of moles by the volume(L).

We get the number of moles by dividing the mass given in the problem to the molar mass of the compound.1.825/36.5=0.05 moles of HCl so 0.05 moles of

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3 years ago

How many atoms are in a 158.69 g sample of nickel?

Alchen [17]

<h3>Answer:</h3>

1.6283 × 10²⁴ atoms Ni

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Use Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

158.69 g Ni

<u>Step 2: Identify Conversions</u>

Avogadro's Number

Molar Mass of Ni - 58.69 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 158.69 \ g \ Ni(\frac{1 \ mol \ Ni}{58.69 \ g \ Ni})(\frac{6.022 \cdot 10^{23} \ atoms \ Ni}{1 \ mol \ Ni})$
Multiply/Divide: $\displaystyle 1.62827 \cdot 10^{24} \ atoms \ Ni$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 5 sig figs.</em>

1.62827 × 10²⁴ atoms Ni ≈ 1.6283 × 10²⁴ atoms Ni

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3 years ago

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RoseWind [281]

Answer:

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Explanation:

I hope it will help you

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3 years ago

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