From what class(es) of elements is the following compound made? copper || chloride metal and metalloid
metal and nonmetal
metalloid and nonmetal
two metals

Answers

Answer 1

Answer:

Answer: The correct answer is metal and non-metal.

Explanation:

Elements are mainly divided into 3 classes in the periodic table.

1.) Metals: The element which lie on the left side of the periodic table are mainly metals. These elements loose electron easily and form positively charged species. These elements are present in the highest proportion in the periodic table.

2.) Non-metals: The elements which lie on the right side of the periodic table are considered as non-metals. These elements gain electrons easily and form negatively charged species.

3.) Metalloids: These lie between metals and non-metals and show the properties of both metals and non-metals.

Copper lie in the period 4 and group 11 of the periodic table and it can easily loose electron and hence, it is considered as a metal.

Chlorine lie in the period 3 and group 17 of the periodic table and it can easily gain electron and hence, considered as a non-metal.

Therefore, the correct answer is metal and non-metal.

Answer 2

Answer: Metal and non metal because copper is a metal and chloride is a non metal

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If a sample of a gas at 25.2oC has a volume of 536 mL at 0.838 atm, what will its volume be if the pressure is increased to 0.937 atm? A) 477.78 mL B) 563.21 mL C) 503.88 mL D) 613.52 mL

3 x 1023 molecules of element Z have a mass of 38 g. What is the mass of 1 mole?

Answers

38 g / (3 x 10^23 molecules) * 6,02x10^23 molecules/mol = 76,25 g/mol.

Answer:

76.3 g of 1 mole of element Z

Explanation:

According to Avogadro’s number the number of particles in 1 mole of a substance is 6.023 x 10²³.

The mass of 3 x 10²³ particles is 38g

Therefore, the mass of 6.023 x 10²³ is $( 38 g x 6.023 x 10^2^3)/(3 x 10^2^3)$ = 76.3 g

Which of the following metal atoms would have the highest conductivity?

Answers

Conductivity is a way that an atom reacts. Therefore, when we say "highest" we mean the most reactive. Elements or atoms that are highly reactive are those that want to be stable. Therefore, the atoms that have 7 valence electrons would be highly reactive because they need 1 more electron to fill their outer energy shell to become stable.

Answer:The atom with the largest radius and the most valence electrons.

Explanation:it just makes sense and it’s also right.

The oxygen saturation of a lake is found by dividing the amount of dissolved oxygen the lake water currently hasper liter by the dissolved oxygen capacity per liter of the water, and then converting that number into a percent. If the lake currently has 7.4 milligrams of dissolved oxygen per liter of water and the dissolved oxygen capacityis 9.4 milligrams per liter, what is the oxygen saturation level of the lake, to the nearest percent? Please help me with this one ;(

Answers

$(7.4)/(9.4)*100\%= (7.4*100)/(9.4)\%= (740)/(9.4)\%\approx78.72\%\approx79\%$

Final answer:

To find the oxygen saturation level of the lake, divide the amount of dissolved oxygen in the lake's water per liter (7.4 mg/L) by the water's dissolved oxygen capacity per liter (9.4 mg/L) to get the proportion. Multiply this by 100 to convert it into a percentage (78.72%), which rounds to 79% saturation.

Explanation:

To calculate the oxygen saturation of the lake, we divide the amount of dissolved oxygen the lake water currently has per liter by the dissolved oxygen capacity per liter of the water, and then we convert that number to a percentage.

Here are the steps to solve this problem:

First, divide the amount of dissolved oxygen the water currently has (7.4 milligrams per liter) by the dissolved oxygen capacity (9.4 milligrams per liter). This will give you the proportion of oxygen in the water. This step is a simple division: 7.4 ÷ 9.4 = 0.7872 (rounded to the nearest four decimal places).
Next, multiply the result by 100 to convert the proportion into a percentage. This step is 0.7872 x 100 = 78.72% (rounded to the nearest hundredth).
However, your question asks to round to the nearest percent, so the final answer would be 79% when rounded to the nearest percent. Thus, the oxygen saturation level of the lake is 79%.
Note that this oxygen saturation is important to many aquatic organisms that need oxygen from the water to survive.

Learn more about Oxygen Saturation here:

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Which of the following was NOT a conclusion of Rutherford’s gold foil experiment? a. The atom is mainly empty space
b. The nucleus has a negative charge
c. The atom has a dense nucleus
d. Alpha particles can pass through a thin sheet of gold foil
e. All of the above are correct regarding the gold foil experiment

Answers

The answer is b.) The nucleus has a negative charge

It was not a conclusion because it is neutral. It is not positive nor negative.

Write a short note on the causes and effects of global warming and acid rain.

Answers

Answer:

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

Acid rain affects nearly everything. Plants, soil, trees, buildings and even statues can be transformed by the precipitation.

Is BH2F a gas or a liquid and what is the boiling point

Answers

Hey I tried but could not find your answer, but maybe you could try to calculate the average of bpts of the different elements in the compound to find the boiling point. And when you know the bpt, you can find out whether it is a liquid or gas. But after searching a lot, I found it was a solid. Good luck!

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