Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the differences in the path of the Sun and in sunrise and sunset times are due to the Earth's orbit on its axis and the Earth's curvature.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. The differences in the path of the Sun and in sunrise and sunset times are due to the Earth's orbit on its axis and the Earth's curvature.
Therefore, the differences in the path of the Sun and in sunrise and sunset times are due to the Earth's orbit on its axis and the Earth's curvature.
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How many miles of N are in 0.179g of N2O?
Answer:
8.14x10⁻³ moles of N
Explanation:
In order to solve this problem first we convert 0.179 grams of N₂O into moles, using its molar mass:
0.179 g ÷ 44 g/mol = 4.07x10⁻³ mol N₂OThen we convert N₂O moles into N moles, using the data given by the compound's formula (that there are two N moles per N₂O mol):
4.07x10⁻³ mol N₂O * [tex]\frac{2molN}{1molN_2O}[/tex] = 8.14x10⁻³ mol NWhat is the molarity of a solution made by dissolving 3.51 mol NaCl in water to make
2.03 L of solution?
Answer: 1.73M
Explanation:
Molarity= moles of solute/ total volume of solution
= 3.51 mol / 2.03 L
= 1.729 M
= 1.73 M
4. The table shows the thermal conductivity of some common materials. Which would be the best insulator A. diamond B. gold C. lead D. concrete
please help me
The answer should be diamond.
Explanation:
2 What is the correct sequence of steps for the preparation of a pure sample of copper(II) sulfate
crystals from copper(II)oxide and sulfuric acid?
A dissolving → crystallisation → evaporation - filtration
B dissolving → evaporation filtration → crystallisation
Cdissolving → filtration - crystallisation - evaporation
D dissolving + filtration → evaporation → crystallisation
Answer:
The correct answer is - B. dissolving → evaporation filtration → crystallisation
Explanation:
The method of the preparation of a pure sample of copper(II) sulfate from dilute sulfuric acid and copper II oxide is given as follows:
step 1. Adding dilute sulfuric acid into a beaker. Using bunsen burner heat the beaker.
step 2. Adding the copper (II) oxide into the beaker and give it a little time at a time to the warm dilute sulfuric acid and stir
step 3. Filtering the mixture into an evaporating vessel to remove the excess copper (II) oxide and water from the filtrate.
Step 4. leave the rest filtrate to crystallize.
Copper (II) Oxide {CuO (s)} + Dilute Sulfuric Acid {H2SO4 (aq)} → Copper (II) Sulphate {CuSO4 (s)} + Water {H2O}
The correct sequence of steps for the preparation of a pure sample of copper(II) sulfate crystals from copper(II) oxide and sulfuric acid is dissolving → evaporation filtration → crystallisation.
Which form is the purest?Purest form of any substance is the crystalline form, if we get the compound in the crystalline form from any extraction then we get a pure sample.
Crystals of copper(II) sulfate, will get from copper(II) oxide and sulfuric acid through following steps:
First we put sulfuric acid in a beaker and then we warm in water bath.Then we add some powder of copper(II) oxide to the beaker, and will continue this adding till it is in excess.Then we filter the mixture and pour the filtrate of copper(II) sulfate into an evaporating basin and heat the solution evaporate half of the water.Then we pour the above solution into an evaporating basin & leave to allow all water to evaporate, and finally get the crystals of copper(II) sulfate.Hence, option (B) is correct.
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Does respiratory happens in the lungs true or false?
Answer:
True
Explanation:
Answer:
True
Explanation:
the lungs is a part of respiratory system, so it is true; its main job is to remove Co2 from your body and bring in fresh air
Which of the following chemical substances has diatomic molecules? a) carbon dioxide b) nitrogen c) ozone d) nitrogen dioxide
Answer:
C I think
Explanation:
describe how solid ammonium chloride can be separated from a solid mixture of ammonium chloride and anhydrous calcium chloride
Answer:
It can be done by crystallization, filtration or sublimation. The easiest method among the three is separation by sublimation. Ammonium chloride sublimes upon heating.
Explanation:
Even when the temperature of a pan of water is less than the boiling point, water still evaporates. This is because
a. the speeds of individual molecules varies
b. conservation of energy
c. of convection
d. radiation
Suppose you have 11.0 mol of (CH4) and 9.0 mol of (O2) in a reactor. Calculate the largest amount of CO2 that could be produced
Why vitamin A(retinol) transported by chylomicrons ?
Answer:
from the small intestine (RE = retinyl ester; ROH = ret- inol. CM = chylomicron remnant). is split at least one intact molecule of retinol, retinal.
18.0 g of carbon produces 55.0 g of carbon dioxide. What is the theoretical yield of CO2?
Answer:
Theoretical yield of CO₂ is 66 g
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated:
C + O₂ —> CO₂
Next, we shall determine the mass of C that reacted and the mass of CO₂ produced from the balanced equation. This can be obtained as follow:
Molar mass of C = 12 g/mol
Mass of C from the balanced equation = 1 × 12 = 12 g
Molar mass of CO₂ = 12 + (16×2)
= 12 +32
= 44 g/mol
Mass of CO₂ from the balanced equation = 1 × 44 = 44 g
SUMMARY:
From the balanced equation above,
12 g of C reacted to produce 44 g of CO₂.
Finally, we shall determine the theoretical yield of CO₂. This can be obtained as follow:
From the balanced equation above,
12 g of C reacted to produce 44 g of CO₂.
Therefore, 18 g of C will react to produce = (18 × 44)/12 = 66 g of CO₂.
Thus, the theoretical yield of CO₂ is 66 g.
Answer:
66 grams
Explanation:
Chemical reactions and nuclear reactions cause matter to change in different
ways. Which two statements describe how matter changes only in a nuclear
reaction?
A. Atoms of new elements are formed.
B. Each atomic nucleus changes
C. The electrons of atoms are rearranged.
D. No new elements are formed.
Answer:
A. Atoms of new elements are found.
I need help with this because it's easy for you guys but I don't understand it
Answer:
from nitrogen fixation in plants, lightning and bacteria
Explanation:
Please help! Due today!
Answer:
five(5) of them
sorry if I'm wrong
3. If the force of gravity between Earth and the sun were greater than Earth’s inertia, what would happen to Earth? (highlight your answer)
A.Earth would escape into space
B. Earth would fall into the sun
C. Earth would remain in its orbit around the sun
D. Earth would stop moving
Answer:
B
Explanation:
Gravity pulls so if it is greater, then earth will fallllllll
If the force of gravity between Earth and the sun were greater than Earth’s inertia then the Earth would fall into the sun. The correct option is B.
What is gravity?The force that keeps the gases in the sun together. The force that causes a ball thrown into the air to fall back down.
The force that causes a car to coast downhill even when no gas is applied. The force that results to a glass to fall to the floor when it is dropped.
The stronger the pull of the gravitational forces they exert on each other, the greater the mass of the two objects and the shorter the distance between them.
The Sun's gravity is approximately 27.9 times that of Earth, and it aids in the control of the tides on Earth.
The Earth would fall into the sun if the force of gravity between Earth and the sun was greater than the force of inertia.
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PLS HELP ASAP. list 5 chemicals that contribute to ozone layer depletion?
Answer:chlorofluorocarbons (CFCs)
halon.
carbon tetrachloride (CCl4)
methyl chloroform (CH3CCl3)
hydrobromofluorocarbons (HBFCs)
hydrochlorofluorocarbons (HCFCs)
methyl bromide (CH3Br)
bromochloromethane (CH2BrCl)
Explanation:
BRAINLIEST pls
What volume in milliliters of H20 you need during preparation of 100 milliliters of 14.00 M H2SO4 solution starting with bottle of 17.5 M H2SO4? (Round your answer to closest integer)
Answer:
20 mL
Explanation:
We can determine the required volume of the concentrated (17.5 M) H₂SO₄ solution by using the C₁V₁=C₂V₂ formula:
17.5 M * V₁ = 14.00 M* 100 mLV₁ = 80 mLAs out of the 100 mL of the final solution, 80 mL are from the concentrated H₂SO₄ solution, the remaining 20 mL are of water (H₂O).
When a crystal of sugar dissolves in water, what happens to the entropy?
a. the sugar’s entropy increases, and the total entropy of the universe decreases.
b. the sugar’s entropy increases, and the total entropy of the universe increases.
c. the sugar’s entropy decreases, and the total entropy of the universe increases.
d. the sugar’s entropy decreases, and the total entropy of the universe decreases.
Answer:
Since sugar spontaneously dissolves in water, the total entropy of water and sugar has to increase when sugar dissolves.
so.
b. the sugar’s entropy increases, and the total entropy of the universe increases
NEED HELP ANSWERING THIS QUESTION
I-Ö-I I--I.
I-U-I •I-O-I.
I-Ö-I
B.
D.
Which is the correct Lewis structure for ethylene, C2H4?
.
I-0-I I-0-I
I.-O-I
II
E.
I-U-I
エーローエ
OA. A
OB. B
Ос. с
OD. D
A.
Answer:
I think the answer is A.
please give thanks if it helps
and sorry if it doesn't help.
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Question 2 of 19
In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor.
hydrogen + oxygen —— water
If you burn 53.0 g of hydrogen and produce 474 g of water, how much oxygen reacted?
mass of oxygen:
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9:27 A
4/25/2
Answer:
hydrogen + oxgen = nitrogen
What do you think is the most important part of the radio receiver circuit?
Answer:
Design of a radio receiver must consider several fundamental criteria to produce a practical result. The main criteria are gain, selectivity, sensitivity, and stability. The receiver must contain a detector to recover the information initially impressed on the radio carrier signal, a process called modulation.
What is the volume of CO2 (acting as an ideal gas) if 64.0 mL of 1.261 M HCl reacts with excess
CaCO3 at 28 °C and 0.987 atm? Show your work and box your answer
2HCl + CaCO3 + H2O + CO2 + CaCl2
Answer:
1.01 L
Explanation:
Step 1: Write the balanced equation
2 HCl + CaCO₃ ⇒ H₂O + CO₂ + CaCl₂
Step 2: Calculate the reacting moles of HCl
64.0 mL (0.0640 L) of 1.261 M (1.261 mol/L) HCl react. The reacting moles are:
0.0640 L × 1.261 mol/L = 0.0807 mol
Step 3: Calculate the moles of CO₂ produced from 0.0807 moles of HCl
The molar ratio of HCl to CO₂ is 2:1. The moles of CO₂ produced are 1/2 × 0.0807 mol = 0.0404 mol.
Step 4: Calculate the volume occupied by 0.0404 moles of CO₂
0.0404 moles of CO₂ are at 28 °C (301 K) and 0.987 atm. We can calculate the volume occupied using the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 0.0404 mol × (0.0821 atm.L/mol.K) × 301 K / 0.987 atm = 1.01 L
Natural processes tend to increase the __________ of thermodynamic systems.
a. internal energy
b. temperature
c. entropy
d. Carnot efficiency
Answer:
the answer is c
Explanation:
A worker at a nuclear power plant has noticed that his dosimeter alarm has
been activated. What might this indicate?
Answer:
Radiation is being released from the reactor.
Explanation:
( A P E X )
Which of the following is an example of an anion that contains a metal?
A. Sulfate
B. Phosphate
C. Chromate
D. Nitrate
.
I think sulphate is answer.
Chromate from the following given list is an example of an anion that contains metal, therefore the correct answer is option C.
What is a Chemical compound?The chemical compound is a combination of two or more either similar or dissimilar chemical elements
Sulphate is an anion in which both sulfur and oxygen are non-metals.
Phosphate is an anion in which both phosphorus and oxygen are non-metals.
Chromate is an anion in which chromium is metal and oxygen is a non-metal.
Nitrate is an anion in which both nitrogen and oxygen are non-metals.
Thus, Chromate is an anion in which chromium is metal, therefore the correct answer is option C.
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How much energy is contained in a particle that has a mass of m = 1 ug
Answer:
90MJ
Explanation:
Energy= mc^2
Where c= speed of light
m= mass of the object
Mass= m = 1 ug ( then we need to convert from micro gram to micro Joule)= 0.000000001
C= 3× 10^8 m/s
E= = [0.000000001 × (3× 10^8 )^2]
E = [0.000000001 × 89 875 517 873 681]
= 89 875 517.9 joule
Then we can convert to megajoules as
90MJ
7 organic compounds of plant origin
Explanation:
Among the numerous types of organic compounds, four major categories are found in all living things carbohydrates, lipids, proteins and nucleic acids.
Plzzzzz help... What causes specific lines to appear in a line spectrum?
Answer:
Spectral lines are produced by transitions of electrons within atoms or ions. As the electrons move closer to or farther from the nucleus of an atom (or of an ion), energy in the form of light (or other radiation) is emitted or absorbed.…
Explanation:
Specific lines appear in a line spectrum because produced by transitions of electrons within atoms or ions.
What are spectral lines?Spectral lines are produced when the electrons undergoes transitions within atoms or ions. When the electrons move far or near to nucleus of any atom, radiation of particular wavelength is emitted or absorbed.
These emitted light is represented as they are moving from one state to the another.
Thus, specific lines appear in a line spectrum because produced by transitions of electrons within atoms or ions.
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Atmospheric pressure decreases as altitude increases. In other words, there is more air pushing down on you at sea level, and there is less air pressure pushing down on you when you are on a mountain.If pentane (C5H12), hexane (C6H14), and hexanol (C6H13OH) are heated evenly at different altitudes, rank them according to the order in which you would expect them to begin boiling.
Rank from first to last. To rank items as equivalent, overlap them.
1. Hexane high altitude.
2. Pentane high altitude.
3. Hexane sea level.
4. Hexanol sea level
Answer:
Boils first >Pentane at high altitude> Hexane at high altitude>hexane at sea level> hexanol at sea level> boils last.
Explanation:
Step 1: To boil, a liquid must overcome the attractive forces between molecules and the outside pressure pushing down on the liquid's surface.
(Hexanol> Hexane> Pentane)
Step 2: Identify which situation is most conducive to boiling
To boil, a liquid must overcome the attractive forces between molecules and the outside pressure pushing down on the liquid's surface.
In which situation would you expect the liquid to boil first, assuming equal heating.
(weak intermolecular attraction and low atmospheric pressure)
Which property of a star is closely related to its temperature?
omposition
brightness
Color
size
Answer:
color
Explanation: