A piece of sodium metal can be described as

Answers

Answer 1

Answer: A piece of sodium metal can be described as a soft silvery white metal that is highly reactive and can sometimes cause explosions. This is the reason why it doesn't occur naturally as an isolated metal. Instead, different sodium containing compounds undergo different processes to isolate the sodium metal.

Answer 2

Answer:

Answer:

D. a pure substance and an element.

Explanation:

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A 700.0 mL gas sample at STP is compressed to a volume of 200.0 mL, and the temperature is increased to 30.0 degrees Celsius. What is the new pressure of gas at kPa?

The process of gas converting to a liquid is called evaporation.

TRUE

FALSE

Answers

False. Because gas to a liquid is called condensation

Which of the following is true of coral?a.
It is located in deep sea regions.
b.
It supports few species.
c.
It is a large and complex organism.
d.
It is composed of thousands of individuals.

Answers

Coral is found close to shorelines and it can house many different types of organisms. The structures formed by colonies of coral are called reefs, the best example being the Great Barrier Reef in Australia. Coral is actually composed of the skeletons of dead coral. The coral excrete calcium carbonate, resulting in a hard structure which other organisms occupy. The answer is D.

I know for a fact that the answer to this question is d; i just took the test & got it right. It's also the most logical response. Hope i helped!

What is the mass percentage of carbon in 5.000 G of sucrose

Answers

Answer : The mass percentage of carbon in sucrose is, 42.1 %

Explanation: Given,

Molar mass of C = 12 g/mole

Molar mass of H = 1 g/mole

Molar mass of O = 16 g/mole

First we have to calculate the molar mass of sucrose.

Molar mass of sucrose $(C_(12)H_(22)O_(11))$ = $12(12)+22(1)+11(16)=342g/mole$

Now we have to calculate the mass of carbon in 5 g of sucrose.

As we now that there are 12 number of carbon atoms, 22 number of hydrogen atoms and 11 number of oxygen atoms.

The mass of carbon = $12* 12=144g$

As, 342 g of sucrose contains 144 g of carbon

So, 5 g of sucrose contains $(5)/(342)* 144=2.105g$ of carbon

Now we have to calculate the mass percentage of carbon in sucrose.

Formula used :

$\%\text{ Mass percentage of carbon}=\frac{\text{Mass of carbon}}{\text{Mass of sucrose}}* 100$

Now put all the given values in this formula, we get:

$\%\text{ Mass percentage of carbon}=(2.105)/(5)* 100=42.1\%$

Therefore, the mass percentage of carbon in sucrose is, 42.1 %

17) 8.4 / 20 x 100

18) 20 . 0.5150

19) 6,50% because (as you said) the law of definite proportions states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass

What is the name of the ionic compound that contains a NA+ ion for every Cl- ion

Answers

The name is sodium chloride. This is an ionic compound so you use the ionic naming system which is the name of the cation followed by the name of the anion. I hope this helps. Let me know if anything is unclear.

What is Atomic Radius

Answers

Answer:

Atomic Radius can be simply defined as the distance between the last shell of electrons and the nucleus of an atom.

Answer: The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons. Illustrated Glossary of Organic Chemistry - Atomic radius. Atomic radius: The radius of an atom. This distance between an atom's nucleus and outer electron shell. ... Atomic radius differs with the bonding state of an atom (for example a nonbonded atom of an element versus the same element within a covalent bond). Atomic radius is determined as the distance between the nuclei of two identical atoms bonded together. The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group.

hope this helps..... Stay safe and have a great weekend!!!! :D

The atomic mass of hydrogen is one.true or false

Answers

its 1.0079 is hydrogen's atomic mass , the answer to your statement is true

Answer: True

Explanation:

Atomic mass Approximately, the number of protons plus neutrons in an atom.

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