Answer:
what is electron?electrone is a subatomic particle whose electric charge is negative one elementary charge.
what is the meaning of civil rights?civil rights are the rights that people have to equal treatment and equal opportunities.
what is force?in physics, force is an influence that can change the motion of an object.
4. A student heats copper metal over a flame, and it begins to react with oxygen gas (diatomic
molecule 02) in the air. A green flame is seen. Copper (11) Oxide is formed.
Word
Explanation:
Since Oxygen and Copper combine to form Copper Oxide. Therefore, this is a combination reaction
Hope this helps
Eutrophication causes loss of Biodiversity”. Substantiate the statement
Eutrophication causes loss of biodiversity because many species need light to survive. It affects light penetration in the water body.
What is eutrophication?Eutrophication is a phenomenon where an aquatic environment (e.g., a lake) is enriched with minerals and nutrients.
The most common nutrients associated with eutrophication are nitrogen and phosphorus.
Eutrophication can severely affect light penetration in the water body, thereby affecting the survival of producer organisms (plants) and causing a loss of biodiversity across all trophic levels.
Learn more about Eutrophication here:
https://brainly.com/question/8499582
How many moles of molecular oxygen will be needed for
the complete combustion of 100.0 g of sulfur dioxide? The product of this reaction
is sulfur trioxide.
A. 0.7804 moles
B. 1.561 moles
C. 0.641 moles
D. 1.281 moles
Answer:
The answer is A. 0.7804 moles
How much energy is required when a 142.1 gram sample of aluminum goes from 25.5°C to 46°C? (the specific heat of aluminum is 0.90 J/g °C).
Answer:
2621.75 j heat is required to increase the temperature 25.5°C to 46°C.
Explanation:
Given data:
Mass of sample = 142.1 g
Initial temperature = 25.5°C
Final temperature = 46°C
Specific heat capacity of Al = 0.90 J/g.°C
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 46°C - 25.5°C
ΔT = 20.5°C
Q = 142.1 × 0.90 J/g.°C × 20.5°C
Q = 2621.75 j
Thus, 2621.75 j heat is required to increase the temperature 25.5°C to 46°C.
Calculate the volume of an object that has a mass of 20.00 g and a density of 2.45 g/cm^3.
Answer:
2450000 gram
Explanation:
v= m × ρ= 1 cubic meter × 2.45 gram/cubic centimeter= 1000000 cubic centimeter × 2.45 gram/cubic centimeter= 2450000 gram
Explanation:
v=m over D
mass=20.oog
Density=2.45g
20.00-2.45
ans is 17.46
hello people ~
Which of the following groups contain only synthetic fibres?
A. Nylon, Terylene, Wool
B. Cotton, Polycot, Rayon
C. PVC, Polythene, Bakelite
D. Acrylic, Silk, Wool
Answer:
PVC,polythene,Bakelite
Explanation:
PVC stands for polyvinyl chloride used in pipes Polythene used as bags.Bakelite used in switcheswhich element has the same electron configuration as the following:
1s22s22p63s23p64s23d104p65s24d
80+80
help
pelase
80+2-0
Answer:
the first one would be 160 and the second 82 :)
Explanation:
Answer:
160 and 82?
Explanation:
80 plus itself is 160 and 80 plus 2 is 82 minus 0 is 82.
Can someone identify all these crystals?
Ah, yes, these are all very special, and have different looks and textures, to learn about these awesome rocks,
Take a look at the chart shown.
whats the biggest thing in the whole universe
Answer:
The biggest thing in the universe is a supercluster known in the universe is the Hercules-Corona Borealis Great Wall.
Explanation:
Does respiration release or absorb energy?
Answer:
it releases energy
Explanation:
Answer:
It releases energy
Explanation:
The reactions involved in respiration are catabolic reactions, which break large molecules into smaller ones, releasing energy because weak high-energy bonds, in particular in molecular oxygen, are replaced by stronger bonds in the products.
Imagine a campfire on a cold day. At first, the temperature of each log is as cold as the air around it. A few hours after the fire has burned out, the temperature of the ashes will also be cold. But in between, when the fire is burning, the temperature of the logs and surrounding air is very hot. What is the source of this thermal energy? For the answer, begin by identifying the reactants and products for the overall chemical reaction of burning wood. Wood is mostly carbohydrates, the bulk of which is cellulose. Cellulose is made up of hundreds to thousands of glucose groups connectected by oxygen molecules. The chemical formula for cellulose is (C6H12O6)n, where n is the number of glucose groups. For more manageable models, carbohydrates will be modelled as glucose with a chemical formula of C6H12O6.
Answer:
See explanation
Explanation:
According to the first law of thermodynamics, energy can neither be created nor destroyed, but can be transformed from one form to another.
The thermal energy observed in the hot air while the fire rages is obtained from the chemical energy stored in carbohydrates(cellulose) that compose the wood material. As the wood is burnt, this chemical energy stored in chemical bonds of the wood material is converted to heat. The chemical reaction in the combustion of wood can be simply modeled as the combustion of n moles of glucose.
nC6H12O6(s) + 6nO2(g) ===> 6nCO2(g) + 6nH2O(g)
Note that n may even be thousands of glucose molecules that combine to form cellulose present in wood.
FIFTEEN POINTS HELP!!!!! The gravitational strength on Earth is less than the gravitational strength on Jupiter. What will happen to a satellite when it travels from Earth to Jupiter?
Its mass will increase.
Its mass will decrease.
Its weight will increase.
Its weight will decrease.
Answer:
I think it is c.
Explanation:
the weight will increase
because Jupiter has a greater gravitational strength then earth, and the mass does not change wherever you go. So the only awnser that makes sense is c, Its weight will increase.
Please tell me if I'm right or wrong, thanks :)
ЗАl2(SO4)3
How many oxygen atoms are present?
Answer:
12 oxygen atoms
Explanation:
Multiply 3x4 and get 12 that's the easiest way I can explain it lol
Choose the correct products for the double replacement reaction below. Click here to access the solubility rules to determine which product, if any, forms a solid precipitate in the reaction. AgNO3 KCl Upper K l Upper Pb (Upper N Upper O Subscript 3) Subscript 2 Baseline right arrow. ? K O2 NCl KNO3 AgCl AgK ClNO3 K2NO3 AgCl2.
In both cases, the precipitates were AgCl and PbI2 respectively.
What is a precipitate?A precipitate is a solid product obtained from the reaction of two aqueous phase species. Let us now consider the two reactions listed in the question;
AgNO3(aq) + KCl(aq) ----> AgCl(s) + KNO3(aq)2KI(aq) + Pb(NO3)2 (aq) ----->PbI2(s) + 2KNO3(aq)We can see that in both cases, the precipitates were AgCl and PbI2 respectively.
Learn more about precipitates: https://brainly.com/question/24846690
Answer:
B and B
Explanation:
edge 2022
An atom contains 15 protons and 17 neutrons. How many electrons does this atom have and what is its atomic number?
Number of electrons: Atomic Number:
Answer: Electrons: 15 Atomic number :15
Explanation:
which of the following provides the best analogy for an electron in an atomic orbital
Answer:
a
Explanation:
the answer is a i'm pretty sure it might be wrong tho i'm sorry
1
This question is about the Earth and its atmosphere.
Figure 1 shows the Earth and its atmosphere billions of years ago.
The boiling point of water is 100°C.
Suggest one reason why there was no liquid water on the Earth's surface billions of
years ago.
Earth's early
atmosphere of:
• carbon dioxide
• water vapour
• methane
• ammonia
Answer:
water vapour
Explanation:
allow the Earth’s surface
temperature was too/very hot
or water evaporated/ boiled
or turned to steam/gas
allow because of heat from
volcanoes
ignore the Earth’s surface
was covered by volcanoes
ignore water turned to water
vapour
How many copper atoms are in a pure copper statue with a mass of 198 kg?
Answer:
No.of copper atoms= no.of moles x No x atomicity
(No - avagardro's number )
= wt / atomic mass x No x 1
= 198 x 10 ^3 g / 63.5 x No
= 3.118 x 10^3 x 6.02 x 10^23
= 18.77 x 10^26 atoms.
Can someone tell me this? I’m rlly lost i -
Answer:
A Golgi Body
B Vacuole
C Mitocondrian
D Nucleus
E Cell membrane
Explanation:
Electromagnetic radiation emitted from a hot object reaches it's peak at a wavelength of 8.5 x 10-7 m. What is the frequency of this radiation
Answer:
the frequency is 18
Explanation:
please mark me as the branlest hope it helps please
4) What type of reaction is the following?
exothermic
endothermic
not enough information given
Answer:
Endothermic
Explanation:
Notice that heat is written as part of the reactants. Therefore, heat is necessary for the reaction to proceed.
In other words, the reaction is endothermic.
Conversely, if the heat is written as part of the products, heat is released as the reaction proceeds and hence the reaction is exothermic.
A 1 kg object accelerates at a rate of 5 m/s2.
Answer:
5 N.
Explanation:
We can calculate the net force on the object by using Newton's second law of motion:
F is the net force on an object
m is the mass of the object
a is its acceleration
For the object in this problem, we have
m = 1 kg is its mass
is its acceleration
Substituting into the equation, we find the net force:
What is carbon sink and how it effects our environment?
Answer:
Explanation:
Carbon sink is basically anything that absorbs carbon from the atmosphere. Particularly, the soil, trees, plants and the ocean absorb the most carbon, which helps with greenhouse emission.
What is the specific heat of titanium if the temperature of a 36.7 g sample of titanium is increases by
4.8 °C when 91.6 J of heat is added?
Answer:
what is the initial temperature? i can answer once I know. if it doesnt say, then I dont know and I'll delete this
Pearls are made of calcium carbonate and can be broken down ( or dissolved ) by Hcl according to the following balanced equation :
CaCo3 + 2 HCl -> CaCl2 + H2O + CO2
What volume of 0.400 M HCl would be needed to dissolve a CaCO3 pearl which weighs 0.400 grams?
[tex]\boxed{\sf Molarity=\dfrac{Moles}{Vol\:in\:L}}[/tex]
Moles of CaCO_3:-
0.4/100=0.004mol1 mol Calcium carbonate need 2 mol HCl0.004 mol will need 0.004(2)=0.008mol HClCome to formula stated first
[tex]\\ \tt\Rrightarrow Volume=\dfrac{Moles}{Molarity}[/tex]
[tex]\\ \tt\Rrightarrow volume=\dfrac{0.008}{0.4}[/tex]
[tex]\\ \tt\Rrightarrow volume=0.02\ell=20m\ell[/tex]
Which of the following is a possible pH for distilled water that has lime (a base) dissolved in it?
a. 1
b. 3
c. 7
d. 9
Answer:
Explanation:
Distilled water has a pH of 7. Anything below that is acidic. One is very acidic. So a b and c cannot be the answer.
Lime is a base. That means that when it is put in water, the pH is going to be greater than 7,
The only possible answer is D
a 50.o mL beaker contains 680. g mercury what is the density of mercury?
Answer:
13.6 m/v
Explanation:
d=m/v
d=680/50
d=13.6
Oxygen gas is prepared in the laboratory through the catalytic decomposition of hydrogen peroxide. Define a catalyst
Answer:
Catalyst:
Explanation:
A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
Which of these statements accurately describes polymers?
Polymers are macromolecules.
Polymers are simple molecules.
Polymers are made of metal atoms.
Polymers contain double bonds.
Answer:
Its A.) Polymers are macromolecules
Explanation:
Answer:
The correct answer that you are looking for is A.) Polymers are macromolecules.