9. Use dot and cross diagrams to represent the following compounds.
a. Sodium chloride (NaCl)​

Answer: DNA makes protein molecules to help with almost every cellular process.

i think?

Answer:

O

Explanation:

they have O valence electrons

Answer:

Explanation:

Heat transfer occurs by three main mechanisms: conduction, where rigorously vibrating molecules transfer their energy to other molecules with lower energy; convection, in which the bulk movement of a fluid causes currents and eddies that promote mixing and the distribution of thermal energy

Answer:

B Group Salt (Ionic Bond)

Explanation:

Iron (III) Oxide

Fe2O3

Answer:

Carbon Trioxide

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume}\\[/tex]

From the question

mass = 57.9 g

volume = 3 cm³

We have

[tex]density = \frac{57.9}{3} \\ [/tex]

We have the final answer as

Hope this helps you

You just need one to reach full energy. (A)

Only one electrons does chlorine need to obtain a full outer energy level of electrons. Thus, option A is correct.

An electron is defined as a subatomic particle which is charged negatively either bounded to an atom or not it means free. The nucleus of an atom is made up of electron, proton and neutron. The electron is a basic particle and electron is not made of anything.

The nature of electron is free it means they are present freely in nature and consist of an atom.The main function of electron is that they play the role of negatively- charged component of an atom.

The electrons are primary source of current conducting and electrons number as well as atomic number of an element is always same or equal. There is no size of electron but the mass of electron is 9×10^-31.

Learn more about electron here:

https://brainly.com/question/1255220

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Answer:

1.17x107m

Explanation:

Answer:

an atom. It is the smallest thing known to man kind

Explanation:

Answer:

C

Explanation:

so basically, we can eliminate some answer choices right away.

an atom (answer choice D) is made up of all the other answer choices, so that is the largest (not the answer).

a nucleus (answer choice B) is made up of protons (answer choice A) and neutrons which means it is not the smallest either (not the answer).

now, we are left with a proton and an electron. electrons are much smaller than protons, so they are usually not included in an element's atomic mass. therefore, an electron is the smallest out of these answer choices.

Answer:

I believe it is Potassium (K)

Explanation:

I did the math on a calculator and it was the closest atomic mass to potassium.

Answer:

Answer:

Acoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, they can grab most solids or liquids even small insects. For the first time engineers have shown it is possible to stably trap objects larger than the wavelength of sound in an acoustic tractor beam. This discovery could enable the manipulation of drug capsules or micro-surgical implements within the body. The discovery could even lead to levitating humans.

Explanation:

Answer:

One word for this is, raconteur - it means a person skilled in telling anecdotes. anecdotist. narrator,  or storyteller

Explanation:

Answer:

Neck injury, and back injury

Answer:

mass and distance between them

Answer:

proton

Explanation:

"Proton: A positively charged particle found in the nucleus of an atom. A proton contributes one atomic mass unit to the total atomic weight of an atom" this is definition per Google search

Metals are ductile,malleable,good conductors and shiny

Answer:

40.7% abundance of Ga-71

59.93% abundance of  Ga-69

Explanation:

Given data:

Average atomic mass of Ga = 69.72 amu

Atomic mass of Ga-69 = 68.9257 amu

Atomic mass of Ga-71 = 70.908 amu

Percent abundance of each isotope = ?

Solution;

we know there are two naturally occurring isotopes of Ga.

First of all we will set the fraction for both isotopes

X for the isotopes having mass 68.9257

1-x for isotopes having mass 70.908

we will use the following equation,

68.9257x +  70.908 (1-x) = 69.72

68.9257x +70.908 - 70.908x = 69.72

68.9257x -  70.908x = 69.72 - 70.908

-1.9823x =  - 1.188

x=  1.188/1.9823

x= 0.5993

0.5993 × 100 = 59.93 %

59.93 %  is abundance of Ga-69 because we solve the fraction x.

now we will calculate the abundance of Ga-71.

(1-x)

1 - 0.5993 = 0.4007

0.4007× 100= 40.7 %

40.7 % for Ga-71.

Answer:

a ruler

Explanation:

Answer:

Everything we see comes from the transferring of electrons, or redox reactions. Fire, the screen you are staring at, and many other chemical reactions that happen everyday, we don't even care to notice anymore. Everything in our bodies is made up of compounds, from simple things such as H2O, and to the food we eat, loaded with sugar, C12H22O11. From the para-benzoic acid on your sunscreen, to the O3 in the ozone layer high above us.

Explanation:

Answer:

The answer is D

Explanation:

All of these solutions are correct.

Answer:

d

Explanation:

edge

Answer:

Channel 7's frequency is 117.5 MHz

Answer:

174 MHz - 180 MHz w/ center frequency of 177 MHz

Explanation:

216 - 174 = 42

42/7 = 6

6 + 174 = 180          -           7                   -               177 MHz

180 + 6 = 186          -           8                   -               183 MHz

186 + 6 = 192          -           9                   -               189 MHz

192 + 6 = 198          -          10                   -               195 MHz

198 + 6 = 204          -          11                   -               201 MHz

204 + 6 = 210          -          12                  -               207 MHz

210 + 6 = 216          -           13                  -               213 MHz

Answer:

4

Explanation:

Sodium Na, Carbon C, hydrogen H2, Oxygen O

Answer:

The Earth's core is mainly made of iron and nickel.

Explanation:

Answer: The Earth's core is mainly made of iron and nickel.

Explanation:

Answer: Compound are different than elements because compounds are combinations of 2 or more elements.