Question 5
5. CFC's break down
Ozone
carbon dioxide
Oxgygen
nitrogen

Answer:

6⅔ shifts

Explanation:

From the question given:

A shift = 4 hours

Pay = $8.25 per hour

Next, we shall determine the number of hours that will result in a pay of $220. This can be obtained as follow:

$8.25 = 1 hour

Therefore,

$220 = $220 × 1 hour / $8.25

$220 = 220/8.25 hours.

$220 = 80/3 hours

$220 = 26⅔ hours

Therefore, it will take 26⅔ hours to receive a pay of $220.

Finally, we shall determine the number of shifts in 26⅔ hours. This can be obtained as follow:

4 hours = 1 shift

Therefore,

26⅔ hours = 26⅔ ÷ 4

26⅔ hours = 80/3 × 1/4

26⅔ hours = 80/12

26⅔ hours = 20/3

26⅔ hours = 6⅔ shifts

Therefore, she will work 6⅔ shifts in order to receive a pay of $220

Explanation:

matter is anything that occupies space and has mass

Answer:

The bonds that exist between their atoms and molecules differ on an atomic scale.

Explanation:

The three basic states of matter are solid, liquid, and gas. The major difference between them is the strength of the bonds that hold their molecules together. This affects the way that the molecules interact with each other.

The intermolecular forces binding solids together are very strong. This makes solids rigid and not able to move about freely, but rather, only able to vibrate about a mean position.

The intermolecular forces binding liquid atoms together are a lot weaker than that of solids. This makes liquids able to flow.

The intermolecular forces binding gas molecules together are the weakest. As a result, the gases can move about freely and occupy no definite volume.

Answer:

kinetic, thermal and chemical not physical

The following are types of energy:

Energy in physics is the ability to do work. Generally it can be said to be the strength, power or ability to do work.

Energy can be contained in a system, can be transformed and can be transfered.

different types of energy are needed in our day to day living.

In conclusion, the types of energy we have are the Thermal Energy, Chemical Energy, and Kinetic Energy etc.

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Answer:

This is the current method of producing sulphuric acid in the high concentrations needed for industrial processes.

Explanation:

This is the meaning of CONTACT PROCESS.

Hope it helps.

Answer:

Explanation:

because it has electron deficiency

Answer:

1425 mmHg.

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 1.5 L

Initial pressure (P1) = 1 atm

Final volume (V2) = 0.8 L

Final pressure (P2) =?

Next, we shall determine the final pressure of the gas by using the Boyle's law equation as follow:

P1V1 = P2V2

1 × 1.5 = P2 × 0.8

1.5 = P2 × 0.8

Divide both side by 0.8

P2 = 1.5/0.8

P2 = 1.875 atm

Finally, we shall convert 1.875 atm to mmHg.

This can be obtained as follow:

1 atm = 760 mmHg

Therefore,

1.875 atm = 1.875 × 760 = 1425 mmHg.

Therefore, the new pressure of the gas is 1425 mmHg.

HYPOTHESIS.

In layman terms, a hypothesis is a rough assumption made according to scant observations. Then test to prove the assumption.

Explanation:

Explanation:

Hey, there!!

Group IA elements are called alkali metals because they are highly soluble in water and produce hydrogen and soluble bases.

For, Eg:

[tex]2na + 2h2o = 2naoh + h2[/tex]

[tex]2k + 2h2o = 2koh + h2[/tex]

Hope it helps...

Answer:

Salt is the pure substance out of them all.

Answer: Salt is a pure substance. Pure substances are composed of one type of molecule. All of the substances listed are composed of two or more types of molecules, except for salt. Therefore, salt would be your answer.

Hope this helps.

Answer: 3.156 * 10^7

Explanation: I do not really understand your question. You answered it yourself!

Scientific notation shortens large numbers. The number right after the decimal point can only be between 1 and 9, which you did correctly. When converting to scientific notation, the exponent of ten is based on how many places you moved the decimal and the direction you moved it (left, positive; right, negative). In this case, the exponent of ten is a positive seven.

You did everything correctly :) Good job!

Answer:

Magnesium ion.

Explanation:

Before charge= 2.8.2

after charge= (2.8)2+

Answer:

A mineral is an inorganic solid substance formed naturally in the ground having a definite physical and chemical properties.

The internal atomic structure or arrangmenet of atoms of a mineral determines the chemical and physical properties of the mineral.

For example: diamonds and graphite, atmoic structure of diamond is  rigid tetrahedral network providing chemical and physical properties of diamond.

Answer:

0.44 L.

Explanation:

Density of nickel(II) chloride = 29.8 g/dL.

Mass of nickel(II) chloride = 131 g

Volume of nickel(II) chloride =?

Next, we shall convert 29.8 g/dL to g/L. This can be obtained as follow:

Recall:

1 g/dL = 10 g/L

Therefore,

29.8 g/dL = 29.8 x 10 = 298 g/L

Therefore, 29.8 g/dL is equivalent to 298 g/L.

Finally, we shall determine the volume of nickel(II) chloride as follow:

Density of nickel(II) chloride = 298 g/L

Mass of nickel(II) chloride = 131 g

Volume of nickel(II) chloride =?

Density = mass /volume

298 = 131/Volume

Cross multiply

298 x Volume = 131

Divide both side by 298

Volume = 131/298

Volume = 0.44 L

Therefore, the volume of of nickel(II) chloride is 0.44 L

Answer:

Percent yield = 87.77%

Explanation:

Given:

Actual yield = 40.2 grams

Theoretical yield = 45.8 grams

Find:

Percent yield

Computation:

Percent yield = [Actual yield / Theoretical yield] 100

Percent yield = [40.2 / 45.8] 100

Percent yield = 87.77%

Answer:

same

Explanation:

yes, I agree 100% and you are correct *applaud*

Answer:

Explanation:

The hazard coding system (developed by the National Fire Protection Association, NFPA) helps the individual working with chemicals to know which chemical is a health hazard, inflammable hazard or a reactivity hazard. This makes the individual makes informed decisions while handling such chemicals and also assists the individual or first responders to know what to or not to do in emergency cases or accident (like contact with the skin).

NOTE: The colour code used here have the meanings below

Red: flammability/fire hazard

Blue: health hazard

Yellow: reactivity hazard

White: special hazard

Answer:Because of the wood

Explanation:Because forests are full of burnable things

Answer:

Repetition

Explanation:

In the world of science, experiments are regularly conducted to test out hypotheses. These experiments are however, not conducted by scientist once to derive a result. They are rather conducted multiple times (repeated) to ascertain the accuracy i.e not as a result of random occurrence. The experiments that undergo multiple trials are said to undergo REPETITION.

This is the case of the scientist in this question, who is conducting an experiment to test what temperature causes the fastest growth rate in sunflower plants. He conducted the experiment multiple times, making it an example of REPETITION.

N.B: Replication is when the experiment is re-conducted by another scientist to see if same result is derived.

Answer:

Answer:- Density of the substance is 0.7

i believe

The speed of the turtle is 9.41 centimeters per second.

We know that

Speed of small turtle = 566 furlong/fortnight

1 furlong = 20,116.8 cm

And,

1 fortnight = 1,209,600 seconds

So,

The speed of the turtle is 9.41 centimeters per second.

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Answer:

Tables and charts are both used to represent data. However, the manner and circumstances in which each is used, distinguishes them from one another. Tables represent facts and figures in a row and column format which makes the data easier and faster to read and compare. On the other hand, charts represent data in a more graphical manner which may include lines, bars and circles.

Explanation:

I Hope This Helps! ^^

Answer:

A pie chart is a graph in which a circle is divided into sectors, each of which represents a percentage of the overall. Its goal is to show percentages at a specific time in history. Pie charts, unlike bar and line graphs, do not illustrate changes over time. Tables sort the data rationally in a row-and-column format, much to spreadsheets. Tables are used to arrange information that is too detailed or complex to be fully described in a text, allowing the reader to see fast results. They can be used to highlight data trends or patterns, as well as to remove numeric data from a document to make it more readable.

Explanation:

:)

Answer:

28.57 grams are in (NO3)2

Explanation:

Answer:

Neutralisation

Explanation:

HCl + NaOH = NaCl + H2O

Explanation:

5 carbons with their substituents being bromo,chloro and dimethyl

I numbered form 1 to 5 from left to right hence the diagram above

The structure of the compound is shown in the  image attached to this answer.

We have to remember that the whole idea of IUPAC nomenclature is to create a generally accepted system of chemical nomenclature such that the structure of a compound can be drawn from its name.

From the name 2-bromo-3-chloro-4,4-dimethylpentanal, we can see that the alkanal moiety should occupy position 1. Counting from that position, the bromime is the next substituent (position 2). The chlorine follows (position 3) and the two methyl groups (position 4) as shown in the image attached.

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Answer:

259200

Explanation:

multiply 180×24×60

259,200 seconds

180 × 24 hours = 4320 hours

4320 × 60 minutes = 259200 minutes

259200 × 60 seconds = 15552000 seconds

Explanation:

when in equilibrium condition the total sum of anti clockwise moment is equal to the sum of clock wise moment

Answer:

Newton's First Law of Motion states that in order for the motion of an object to change, a force must act upon it. This is a concept generally called inertia.

Newton's Second Law of Motion defines the relationship between acceleration, force, and ​mass.

Newton's Third Law of Motion states that any time a force acts from one object to another, there is an equal force acting back on the original object. If you pull on a rope, therefore, the rope is pulling back on you as well.

Explanation:

Answer:

Scientific theories are still to be proven while as scientific laws are already proven.

Answer:

[tex]\boxed{\text{6.95 u; Li}}[/tex]

Explanation:

1. Atomic mass of T

To get the atomic mass of T, you calculate the weighted average of the atomic masses of the isotopes.

That is, you multiply the atomic mass of each isotope by a number representing its relative importance (e.g.., its percent of the total).

[tex]\begin{array}{ccrcr}\textbf{Atom} & \textbf{Mass/u} &\textbf{Percent} & \textbf{Calculation}& \textbf{Result/u}\\^{6}\text{T}& 6.02 & 7.42 & 6.02 \times 0.0742 & 0.45\\^{7}\text{T}& 7.02 & 92.58 & 7.02 \times 0.9258& 6.50\\& & &\text{TOTAL } = &\textbf{6.95}\\\end{array}[/tex]

2. Identity of T

Lithium has an atomic mass of 6.64 u.

Element T is lithium.