Answer: The study of elements and their compounds and reactions with one another.
Explanation: ACTUAL DEFINITION (Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.)
Organic Chemistry: the chemistry of carbon compounds
Inorganic Chemistry: deals with chemicals
Chemistry:-The branch of science deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they change, interact, combine, and the use of these processes to form new substances.
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What is a pure substance - bread, salt, seawater, or soil?
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.
A turtle moves at a speed of 1.0km/h. How fast is the turtle moving in meter per second (m/s)?
The speed of the turtle is 9.41 centimeters per second.
Calculation of speed: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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Plz help What is contact process??give detail?
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.
Calculate the volume in liters of a 29.8 g/dL nickel(II) chloride solution that contains 131. G of nickel(II) chloride . Be sure your answer has the correct number of significant digits.
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
Length of a year. 31,560,000.0 seconds = 3.156 X 10^7 seconds
How do I convert into scientific notation
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!
What’s the difference between a chart and a table?
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:
:)
Which state of matter has the leader molecular motion explain your answer
Someone please answer this one as soon as you see it thank you so much for your time
calculate no of moles in 42g of carbon ?
Answer:
[tex]\huge\boxed{n = 3.5\ moles}[/tex]
Explanation:
Given :
Mass in grams = m = 42 g
Molar Mass = M = 12
Required:
No. of moles = n = ?
Formula :
m = m / M
Solution:
n = 42 / 12
n = 3.5 moles
An unknown sample of mystery element T is analyzed. According to the data 7.42% of the element is ^6T and 92.58% is ^7T. The true mass of ^6T is 6.02amu and 7.02amu for ^7T. Calculate the average atomic mass and identify the element.
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.
A scientist conducts experiments to test what temperature causes the fastest growth rate in sunflower plantsafter multiple trials the results show that sunflower plants grow the fastest at 75 FIs this experement an example of replication or repetition?
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.
What is the structural formula of 2-bromo-3-chloro-4,4-dimethylpentanal
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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What 3 athletic events do not use the SI unit of measurement
Answer:
Long jump doesn't use the SI unit of measurement
Abigail obtained 40.2 grams of calcium carbonate after performing a reaction. From her calculations, she knew she should have obtained 45.8 grams. What was her percent yield? Round your answer to one place behind the decimal. Do not include the unit.
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%
How many seconds in the school year? (One school year is 180 days long.) Please show your work, and report your answer with the correct number of significant figures and appropriate units.
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
Why are forest fires so difficult to extinguish? Make reference to the energetics of combustion reactions.
Answer:Because of the wood
Explanation:Because forests are full of burnable things
Mg2+ ?
-magnesium ion
-sodium ion
-manganese ion
-calcium ion
Answer:
Magnesium ion.
Explanation:
Before charge= 2.8.2
after charge= (2.8)2+
What are two things required for something to be matter?
Explanation:
matter is anything that occupies space and has mass
How many moles of lithium hydroxide would be required to produce 35.0 g of Li₂CO₃ in the following chemical reaction? 2 LiOH(s) + CO₂(g) → Li₂CO₃(s) + H₂O(l)
Answer:
0.947 mol LiOH
Explanation:
2 LiOH + CO₂ ⇒ Li₂CO₃ + H₂O
Convert grams of Li₂CO₃ to moles. The molar mass is 73.891 g/mol.
(35.0 g Li₂CO₃)/(73.891 g/mol Li₂CO₃) = 0.4737 mol Li₂CO₃
Use the mole ratio between LiOH and Li₂CO₃ to covert moles of Li₂CO₃ to moles of LiOH.
0.4737 mol Li₂CO₃ × (2 mol LiOH/1 mol Li₂CO₃) = 0.9474 mol LiOH
Round for proper significant figures.
0.9474 ≈ 0.947 mol LiOH
Giselle is working with a chemical substance in a laboratory. She observes that when the chemical is heated, it gives off a gas. She assumes that the gas is oxygen but decides to test this assumption to verify it. Which type of scientific knowledge is Giselle’s assumption?
HYPOTHESIS.
In layman terms, a hypothesis is a rough assumption made according to scant observations. Then test to prove the assumption.
Explanation:
The Periodic Table is organized into or by _________________. A. All of these B. Groups C. Increasing atomic number D. Properties
Answer:
My best bet is to go with A. All of these
Critical Thinking Challenge: A student has a part time
job in which she works 4 hour shifts. Her pay scale is
$8.25 per hour. How many Shifts does she need to
work to earn $220?
The question gave you 2 conversion factors, start your
problem with $220.
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
What are two things required for something to be matter?
what is the mass of 1500ml of ethyl alcohol if the density of the alcohol is 0.789 g/ml
Given :
Volume of ethyl Alcohol = 1500 ml Density = 0.789 g/mlTo Find :
Mass of ethyl alcoholSolution :
Formula for density is :
[tex]\boxed{\sf{Density\ =\ \dfrac{Mass}{Volume}}}[/tex]
⇒0.789 = Mass/1500
⇒ Mass = 0.789 * 1500
⇒ Mass = 1,183.5 g
Hence, Mass of ethyl alcohol is 1,183.5 g.
Please help with this exercise
Answer:
neutralization is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution.
the ore copper is extracted from: Chalcopyrite
The process or result of oxidizing or being oxidized.
the action or fact of making a specified thing smaller or less in amount, degree, or size.
I can't answer the other ones. sorry
Why should an individual working with chemicals understand the hazard coding system
on a chemical label?
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
What is the difference between a scientific thenry and a scientific law?
Answer:
Scientific theories are still to be proven while as scientific laws are already proven.
3. The sum of gravitational potential energy and kinetic energy is called mechanical
energy. Use Figure 2 to find the mechanical energy of an idealized pendulum at a
variety of times in its cycle. Identify any pattern you notice in the values of
mechanical energy.
Pls helpp
Answer:
Explanation:
Mechanical energy = Kinetic energy + Potential energy
We shall calculate mechanical energy at different points of time .
Time Kinetic energy Potential energy mechanical energy
0 0 4 4
2 2 2 4
4 4 0 4
6 2 2 4
8 0 4 4
10 2 2 4
and so on ........
Hence we see that total mechanical energy is constant at the value of 4
at all time .
Nvermind i messed u. thats not what i meant to outtb ycgdgc8ydsaox agdydac bc7w
Answer:
same
Explanation:
yes, I agree 100% and you are correct *applaud*
State the law of moment of force.
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:
Scientists often investigate alternative explanations for the data and observations presented, even once a hypothesis has been tested and supported through an experiment. This investigation of alternative explanations 1. proves that scientific theories are not able to be disproven. 2. demonstrates that scientific theories are based on opinions. 3. strengthens the evidence and support for a scientific theory. 4. keeps the scientific community competitive and motivated.
Answer:
Explanation:
its 2