All categories

4 years ago

Which of these is an element?

Chemistry

2 answers:

Drupady [299]4 years ago

8 0

Carbon I hope you are right :3

gulaghasi [49]4 years ago

3 0

Answer;

Carbon

Explanation;

-An element or a chemical element refers to a substance that cannot be broken down by chemical means. Elements are pure substances and consists of one type of atom.

-Each atom of an element has an atomic number, which represents the number of protons in the nucleus of the atom of that element.

-In this case, the only element in the above choices is carbon. Carbon is an element in the periodic table with an atomic number of 6.

You might be interested in

Calculate the average bond order for a p−o bond (such as the one shown in blue) in a phosphate ion. express your answer numerica

PtichkaEL [24]

<span>Answer: 1/4 is the average bond order for a pâ’o bond (such as the one shown in blue) in a phosphate ion.</span>

5 0

3 years ago

If you are given the molarity of a solution, what additional information would you need to find the weight/weight percent (w/w%)

Ludmilka [50]

Answer:

- The molar mass of the solute, in order to convert from moles of solute to grams of solute.

- The density of solution, to convert from volume of solution to mass of solution.

Explanation:

Hello,

In this case, since molarity is mathematically defined as the moles of solute divided by the volume of solution and the weight/weight percent as the mass of solute divided by the mass of solution, we need:

- The molar mass of the solute, in order to convert from moles of solute to grams of solute.

- The density of solution, to convert from volume of solution to mass of solution.

For instance, if a 1-M solution of HCl has a density of 1.125 g/mL, we can compute the w/w% as follows:

$w/w\%=1\frac{molHCl}{L\ sln}*\frac{36.45gHCl}{1molHCl}*\frac{1L\ sln}{1000mL\ sln}*\frac{1mL\ sln}{1.125g\ sln} *100\%\\\\w/w\%=3.15\%$

Whereas the first factor corresponds to the molar mass of HCl, the second one the conversion from L to mL of solution and the third one the density to express in terms of grams of solution.

Regards.

4 0

3 years ago

Determine the average atomic mass of the following mixture of isotopes of Potassium:

dexar [7]

Answer

the first one (im pretty sure)

Explanation:

5 0

3 years ago

How to balance Kmno4 + H2 So4+ CH3CH2OH-> K2So4+ mnso4 + CH3COOH + H2o by oxidation number method

dezoksy [38]

Answer:

Ethanol + Potassium Permanganate + Sulfuric Acid = Acetic Acid + Manganese(II) Sulfate + Water + Potassium Sulfate

Explanation:

5 0

3 years ago

The nucleus of unstable _____ of an element will decay leading to emission of radiation.question 1 options:moleculescationsanion

Marta_Voda [28]

Isotopes of same element has different number of neutrons with different masses and having same number of protons and electrons.

Radioactive isotopes are those isotopes which are radioactive in nature. The unstable nucleus results in the radioactivity process and this process will go on until the stable isotope (element) forms.

Thus, the nucleus of unstable isotopes of an element will decay leading to emission of radiation.

6 0

3 years ago