Which of these pairs would form an ionic bond?-K and Br-C and H-H and O-Cu and Cu

Answers

Answer 1

Answer:

The pair K and Br would form an ionic bond because K is a metal and Br is a non metal.

To answer your question about which of these pairs would form an ionic bond, let's look at each pair:

1. K (Potassium) and Br (Bromine) - K is a metal and Br is a non-metal. Metals tend to lose electrons, while non-metals tend to gain electrons. This transfer of electrons results in an ionic bond. Therefore, K and Br would form an ionic bond.

2. C (Carbon) and H (Hydrogen) - Both are non-metals, so they tend to share electrons, forming a covalent bond instead of an ionic bond.

3. H (Hydrogen) and O (Oxygen) - Both are non-metals, and they also tend to share electrons, forming a covalent bond rather than an ionic bond.

4. Cu (Copper) and Cu (Copper) - Since they are the same element and both are metals, they do not form an ionic bond.

In summary, the pair K and Br would form an ionic bond.

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Which of these are physical changes in matter check all that apply .

Answers

Answer:

boiling water

sharpening a pencil

freezing water

What answers are there? you didn't add them.

physical change and chemical change.

physical change affects a substance's physical properties, and a chemical change affects its chemical properties.

chlorine and element x have similar chemical properties an atom of element x could have an electron configuration of

Answers

It could possibly have one very similar to Cl and be
$[Ne]3s^(2)3p^(5)$

An experiment requires 40.0g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?

Answers

Density= mass/volume
volume=mass/density
volume= 40.0g/1.114g per mL
volume= 35.90664273 mL
volume = 35.9 mL

How many protons, electrons, and neutrons does the following isotope contain? 40 Ar

Answers

The isotope 40Ar contains 18 protons, 18 electrons, and 22 neutrons.

The isotope 40Ar refers to the isotope of argon, which has an atomic number of 18.

Since the atomic number represents the number of protons in an atom, we can conclude that the isotope 40Ar contains 18 protons.

Argon is a neutral atom, so the number of electrons also matches the number of protons. Therefore, the isotope 40Ar contains 18 electrons.

To find the number of neutrons, we need to subtract the atomic number (protons) from the mass number (protons + neutrons). The mass number of 40Ar is 40. Subtracting the atomic number of 18 from the mass number gives us:

Number of neutrons = Mass number - Atomic number

Number of neutrons = 40 - 18

Number of neutrons = 22

Therefore, the isotope 40Ar contains 18 protons, 18 electrons, and 22 neutrons.

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Answer:

18 protons, 18 electrons, 22 nuetrons

Explanation:

Argon has an atomic # of 18. Atomic #s show the amount of protons and electrons it has. Atomic mass - atomic # = # of nuetrons. 40-18=22

An experiment produced 0.10 g CO2, with a volume of 0.056 L at STP. If the accepted density of CO2 at STP is 1.96 g/L, what is the approximate percent error?

Answers

According to the accepted density of CO2, we can get that 0.10 g CO2 has a volume of 0.10/1.96=0.051 L (theoretical value). The percent error = (0.056 - 0.051)/0.051 * 100% = 9.80%.

One faraday of electricity will liberate one gram-atom of the metal form a solution .

Answers

One faraday of electricity will liberate one gram-atom of the metal form a solution of CuSO4 or copper sulfate.

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