All categories

3 years ago

Which of the following statements is true?

Chemistry

2 answers:

german3 years ago

8 0

Answer: Solids have a fixed mass, volume, and shape.

Explanation: Solids are the substances which have fixed shape, fixed volume and mass due to its close packed structure.

Dalton explained that all the elements are made up of small indivisible particle known as Atoms but after some time this was proved wrong as atoms is not indivisble, it conatins sub atomic particle like electrons, protons, neutrons etc.

Plasmas are considered as the fourth state of matter which contains equal quantity of positive ions and negative electrons.

The number of protons are equal to the number of electrons. The sum of number of protons and neutrons make the atomic mass quantity.

Alexandra [31]3 years ago

4 0

Solids have a mixed mass, volume, and shape.

You might be interested in

Calculate the mass defect for the formation of phosphorus-31. The mass of a phosphorus-31 nucleus is 30.973765 amu. The masses o

Nata [24]

Answer: The mass defect for the formation of phosphorus-31 is 0.27399

Explanation:

Mass defect is defined as the difference in the mass of an isotope and its mass number.

The equation used to calculate mass defect follows:

$\Delta m=[(n_p\times m_p)+(n_n\times m_n)]-M$

where,

$n_p$ = number of protons

$m_p$ = mass of one proton

$n_n$ = number of neutrons

$m_n$ = mass of one neutron

M = mass number of element

We are given:

An isotope of phosphorus which is $_{15}^{31}\textrm{P}$

Number of protons = atomic number = 15

Number of neutrons = Mass number - atomic number = 31 - 15 = 16

Mass of proton = 1.00728 amu

Mass of neutron = 1.00866 amu

Mass number of phosphorus = 30.973765 amu

Putting values in above equation, we get:

$\Delta m=[(15\times 1.00728)+(16\times 1.00866)]-30.973765\\\\\Delta m=0.27399$

Hence, the mass defect for the formation of phosphorus-31 is 0.27399

8 0

3 years ago

What components did you collect to convert your two molecules of pyruvate to acetyl-coa?

GenaCL600 [577]

You need to have NAD+ as a source of oxidation for the pyruvate, as well as a supply of coenzyme A. CO2 is released by the pyruvate as a carboxyl group is removed

5 0

3 years ago

Which of the following is true of a heterogeneous mixture?

tia_tia [17]

A, a heterogeneous mixture is a mixture where all the particles are not made up of one uniform composition. you can distinguish the different particles

8 0

3 years ago

Read 2 more answers

What do carnivores do and what is another name for them? PLEASE HELP

Genrish500 [490]

1 meat-eating, predatory, predacious. , hopefully this help :)

3 0

3 years ago

Read 2 more answers

One type of electromagnetic radiation that could harm humans

Vladimir79 [104]

Ultraviolet Rays ( UV rays) can harm humans because they can cause sunburn, and skin cance if you stay out in the sun for too long.

3 0

3 years ago