Na+ + Cl–  NaCl Which statement best describes the relationship between the substances in the equation?

Answers

Answer 1
Answer:

Answer : The number of sodium ions is equal to the number of formula units of salt.


Explanation : In the given reaction of NaCl the statement which describes it the best is that the number of sodium ions is found to be same along with the formula units in the product side.


Na^(+) + Cl^(-) ----> NaCl.


Its clear from the equation that one mole of Na and one mole of Cl combines together to give the product, which is one mole of NaCl. The number of ions on both the sides are equal.

Answer 2
Answer: The correct answer for the question that is being presented above is this one: "The number of sodium ions is equal to the number of formula units of salt." The statement that best describes the relationship between the substances in the equation is that the number of sodium ions is equal to the number of formula units of salt.

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Lithium hydroxide is classified as an A. Arrhenius base B. Arrhenius acid C. Alcohol D. Aldehyde

Answers

Lithium hydroxide is classified as an annhenius base since it dissociates into lithium cations and hydroxide an ions and Arrhenius bases are defined as a substance that dissociated into hydroxide anions (as well as cations) when in solution. I hope this helps. Let me know if anything is unclear.

Who Organized elements into four groups based on properties:

Answers

the answer is lavoiser

Final answer:

Antoine-Laurent de Lavoisier, a French chemist, organized elements into four groups based on their properties: gases, nonmetals, metals, and earths. This was a monumental contribution to the field of Chemistry.

Explanation:

The person you're referring to who organized elements into four groups based on their properties is the French chemist Antoine-Laurent de Lavoisier. Lavoisier is commonly known as the 'Father of Modern Chemistry' and his work contributed significantly to the development of this field. In the late 18th century, he sorted 33 elements into four categories: gases, nonmetals, metals, and earths, by recognizing their similar properties. This was a significant step at the time, further paving the way for the modern periodic table.

Learn more about Organization of Elements here:

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Complete the balanced equation: Cu(NO3)2 + Na2CO3 > ?

Answers

I think its CuCO3+NaNO3 but idk if its right 

A model stands on a scale and finds her weight to be 105 pounds. Ifthe pressure exerted by her feet on the scale is 2.16 pounds per
square inch, what is the area of her feet in cubic centimeters?
__cm2

Answers

The area = 313.612 cm²

Further explanation

Force (F) can cause objects to move

While pressure (P)is the force per unit area

\tt P=(F)/(A)

weight=force=105 pounds(lb)⇒english units

pressure = 2.16 lb/in²

Thea are (A)

\tt A=(F)/(P)=(105)/(2.16)=48.61~in^2\n\n1~in^2=6,4516~cm^2\n\n48.61~in^2=313,612~cm^2

A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the molarity of the solution? Show your work.

Answers

The answer is 1.3 mol of NaCl.

We know that there is 76 g of NaCl in 1L of the solution.
But we need to calculate the molarity.
First, we will need the molar mass of NaCl, which is the sum of relative atomic masses of Na (22.99 g/mol) and Cl (35.45 g/mol):
Mr(NaCl) = A(Na) + A(Cl) = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol.

This says that there are 58.44 g of NaCl in 1 mole. So, in how many moles will be 76 g of NaCl)? Use the proportion:
58.44 g : 1 mol = 76 g : x

After crossing the products:
x * 58.44 g = 1 mol * 76 g
x = 76 / 58.44 mol = 1.3 mol

Answer:

1.3005 M

Explanation:

Given that:

Mass of NaCl = 76 g

Molar mass of NaCl = 58.44 g/mol

The formula for the calculation of moles is shown below:

moles = (Mass\ taken)/(Molar\ mass)

Thus,

Moles= (76\ g)/(58.44\ g/mol)

Moles= 1.3005\ mol

Given that volume = 1 L

Considering:

Molarity=(Moles\ of\ solute)/(Volume\ of\ the\ solution)

Molarity=(1.3005)/(1)

Molarity = 1.3005 M

Is Squeezing oranges to make orange juice a chemical or physical change?

Answers

This would be a physical change because despite the fact the juice has been squeezed out of it, the orange is still an orange. A physical change is when something changes matter, like a solid to a liquid or a liquid to a gas. Since it's been changed from a solid orange to liquid juice, it's a physical change.

Hope I helped! :)
squeezing just the juices out of the orange, like with your hand or whatever you use, is a physical change. yes :)