Can someone please please help me please

Answer:

It is in great demand by the glass industry, and it is important in the manufacture of textiles, soaps and detergents, numerous chemicals, paper, and iron and steel. It is also used as a water softener (household washing soda is a well-known form of sodium carbonate) and in the refining of petroleum.

Convert 68 Millimeters to Kilometers (mm to km) with our conversion calculator and conversion tables. To convert 68 mm to km use direct conversion formula below.

68 mm = 6.8E-5 km.

You also can convert 68 Millimeters to other Length (popular) units.

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Answer:

Halogens are highly reactive

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{8.46 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.053156[/tex]

We have the final answer as

Hope this helps you

Answer:

c

Explanation:

II and III

Answer:

look up 4 divided by 1.43

Answer: D

Explanation:

O=C=O

Carbon is in group 14 having four valence electrons and oxygen is in group 16 having six valence electrons hence the correct structure of CO2 is O=C=O.

Carbon and oxygen are nonmetals. Nonmetals form compounds by sharing electrons in a covalent bond.Carbon, a group 14 element has four valence electrons while oxygen, a group 16 element has six valence electrons.

Carbon  can share four valence electrons with two oxygen atoms in CO2 to form the structure O=C=O. In this way, all the atoms now obey the octet rule.

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Answer:

transmission clutches

Answer:

The answer should be primary pollutants from a stationary source.

Explanation:

Primary pollutants are emitted directly from a source and do not change in the atmosphere, and from a stationary source because manufacturing factories have a fixed location.

Hope this helped :D

Answer:

Try quizlet, they have everything on there

Explanation:

Answer:

relative proportions of the elements in a chemical reaction

A molecule or a compound can easily be represented by their formula.Subscripts in chemical formulas are used to indicate the relative proportions of the elements in a compound.

A chemical formula represent the identity and number of elements in a molecule or compound. Each element in periodic table has their own symbols. For example, hydrogen is H, oxygen having O, N for nitrogen, Na for sodium etc.

These chemical symbols are came from the first one or two letters of the Latin names of the elements. The number of these elements in a compound is given as subscripts of their symbols.

For example, there are two hydrogens and one oxygen in  water and the formula is H₂O. Similarly the formula of carbon dioxide is CO₂ where one carbon and two oxygens are present. In this way the compounds can be easily identified and distuinguished using their chemical formulas.

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Answer:

As shown in the attachment,

Explanation:

Answer:

c

Explanation:

Answer:

I don't know either

Explanation:

I am sorry i can not answer you

answer: the variable part of an amino acid is the: SIDE CHAIN

i think the answer is B. scientists used evidence, analysis, and experiments to disprove Alchemy. apologies if its incorrect.

Answer:

A. A cell with a negative cell voltage

Explanation:

other answer is wrong

An electrolytic cell is a cell with a spontaneous redox reaction (option B).

Electrolytic cell is an electrochemical cell that utilizes an external source of electrical energy to force a chemical reaction that would otherwise not occur.

An electrolytic cell converts electrical energy into chemical energy. The redox reaction in the cell occurs spontaneously and is responsible for the production of electrical energy.

Therefore, according to this question, option B is correct.

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Answer:

I think that it would be better to have smaller cells because smaller cells takes less energy to transport waste and generally more efficient to control than larger cells. It is better to have smaller cells because larger and fewer cells takes up more nutrients, but doesn't cover as many surface area. In the end, smaller cells are more efficient, cover more surface area, and moves faster than bigger cells.

Explanation:

I hope that this is the kind of answer you were looking for!

Answer:

B

Explanation:

i don't know minerals a good for the body

Answer:

Its good

Explanation:

It has power

Answer: The widespread occurrence of lithium in plants results in a wide, although low-level, distribution of lithium in animals. Lithium salts have complex effects when absorbed into the body. They are not highly toxic, although high levels can be fatal.

Explanation: Which means that lithium is a good element depending on levels.

Answer:

a) 2H2+O2 = 2H²O

b) 4Fe+30²=2Fe²O³

c) 2Al+6HCl=2AlCl³+3H²

Answer:

Law of Conservation of Mass.

Is that Right?

Answer:

i dont care to you

Explanation:

cause you are tuyo

the answer is this

Answer:

i guess the answer is..true

the ozone in troposphere protects the earth from ultra violet waves that may cause global warming

Answer:

Answer is the third one

Explanation:

All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures.

Answer:

by evaporating the solution leaving the solute (salt) behind after the solvent has evaporated