Answer:
The heat energy released during nuclear fusion
The heat energy released during nuclear fusion. The correct option is D.
Thus, The Sun and other stars are powered by nuclear fusion reactions. A heavier nucleus is created when two light nuclei fuse together in a fusion reaction.
Because the mass of the resulting single nucleus is smaller than the combined mass of the two initial nuclei, the process produces energy. Remaining mass is converted to energy.
Why this happens is explained by Einstein's equation (E=mc2), which states in part that mass and energy can be transformed into one another. Fusion energy could be a significant source of energy generation if scientists can figure out how to use it in equipment on Earth.
Thus, The heat energy released during nuclear fusion. The correct option is D.
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Define chemical reaction
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.
A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
hope this helps ^^
0.0721 moles of a compound have a mass of 31.008 grams. What is the molar mass?
(please show work and provide an explanation!)
Answer:
divide the moles by gram to get molar mass
use calculator and get yo ans
Which of the following would be an example of applied science?
Investigating how carbon dioxide levels impact ocean pH
Investigating why water expands when it freezes
Investigating the conductivity of metalloids
Investigating how to develop a more efficient solar panel
Answer:
Investigating how carbon dioxide levels impact ocean pH
Explanation:
I hope this helps! :)
Which of the following is an element?
A.
magnesium chloride salt (MgCl)
B.
hydrochloric acid (HCl)
C.
carbon monoxide gas (CO)
D.
zinc metal (Zn)
Answer:
zinc metal (ZN) is an element
Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients.
P4(s)+NaOH(aq)+H2O(l)➪
PH3(g)+Na2HPO3(aq)
A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the charge are both equal. P₄ + 4NaOH + 2H₂O → 2PH₃ + 2Na₂HPO₃.
A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the charge are both equal.
A chemical equation must balance according to the rule of conservation of mass. According to the rule, mass cannot be generated or removed during a chemical process.
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If you have a 17% salt solution, how much salt will need to be added to 71 mL of water?
Salt added : 14.5 g
Further explanationGiven
17% salt solution
71 ml water
Required
salt needed
Solution
%mass = (mass solute : mass solution) x 100%
71 ml water = 71 g water(density = 1 g/ml)
mass solute = x
[tex]\tt 17\%=\dfrac{x}{x+71}\times 100\%\\\\0.17(x+71)=x\\\\0.17x+12.07=x\\\\0.83x=12.07\\\\x=14.5[/tex]
Which is a gas at room temperature?
A) aluminum
B) nitrogen
C) potassium
D) sodium
Answer:
B) nitrogen
the Earth's atmosphere is mostly nitrogen
Chemistry Conversion: Convert 3.0099 dumps to wigs. 6375.23 dumps = 1 wig Round your answer to 5 sig figs. dumps and wigs is not a real unit just used for example.
Answer:
There are 0.00047212 wig in 3.0099 dumps.
Explanation:
In this problem, we need to convert 3.0099 dumps to wigs.
6375.23 dumps = 1 wig (given)
1 dump = (1/6375.23) wig
To convert 3.0099 dumps to wigs, multiply 3.0099 by (1/6375.23).
3.0099 dumps = [tex]\dfrac{1}{6375.23}\cdot3.0099[/tex]
= 0.00047 wig
Hence, there are 0.00047212 wig in 3.0099 dumps.
Why are bubbles and color changes not always chemical change?
What is the asthenosphere?
Question 3 options:
The hot, rigid inner part of the upper mantle which can’t flow
The hot, weak inner part of the upper mantle which can flow
The hot, weak outer part of the lower mantle
None of the above
Answer:
None of the Above
Explanation:
The Athenosphere is able to flow but is also part of the UPPER LAYER meaning none of these choices are correct
As an electron in an atom moves from a higher energy state to a lower energy state, the atom
1 becomes a negative ion
2 becomes a positive ion
3 releases energy
4 absorbs energy
Answer:
3 releases energy
Explanation:
An electron in an energy level has a definite amount of energy associated with it at that level.
Electrons can undergo transitions from one level to another. However, when the electron changes its state, it must absorb or emit the exact amount of energy which will bring it from the initial to the final state.
When the electron is excited, it moves from the ground state to an excited state, it must absorb energy. On returning from an excited state to a lower level or the ground state, energy is emitted, giving rise to a line in the spectrum.
Answer: 3 because it releases energy
What forces typically hold nonmetal atoms together within a molecule?
A. Metallic bonds
B. Covalent bonds
C lonic attractions
D Intermolecular forces
Answer:
B - Covalent bonds
Explanation:
Covalent bonds are a class of chemical bonds where valence electrons are shared between two atoms, typically two nonmetals. The formation of a covalent bond allows the nonmetals to obey the octet rule and thus become more stable.
226
) Which equation represents the radioactive decay of Ra?
88
Answer:
A
Explanation:
The study of a chemical is called chemistry.
The correct answer is A
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive.
The radioactive of the Ra is option A that is:-
[tex]RA^{226}_{88}----->Rn^{222}_{86} +He^4_2[/tex].
During the decomposition, the element is breakdown into the neutron, proton, and electron.
Hence, the correct answer is A.
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Is this right? If not which is it pls
Answer:
i believe it is b as well
Explanation:
Students are discussing the pros and cons of petroleum as a naturals resource. Which of the following do you agree with?
Answer:
this is a multiple choice question where are the answers
Explanation:
Is BaOH2 soluble or insoluble in water?
Answer:
Explanation:
Tough question.
The answer is very dependent on the temperature of the water. At 0o C, less than 5 grams is soluble in water.
The curve increases as the temperature increases. At 80oC about 35 grams is soluble in water 100 mL of water. So Ba(OH)2 is very soluble at higher temperatures.
Maybe the question can be resolved just a little better at room temperature. The solubility is still less than 5 grams / 100 mL. That makes it slightly soluble or more soluble than other things.
So to answer the question, you need to specify the temperature. I would say it is, but be prepared to defend your answer.
what is p³×p simplify
Answer:
The answer is p⁴.
Explanation:
You have to apply Indices Law :
[tex] {a}^{m} \times {a}^{n} ⇒ {a}^{m + n} [/tex]
For this question :
[tex] {p}^{3} \times {p}^{1} [/tex]
[tex] = {p}^{(3 + 1)} [/tex]
[tex] = {p}^{4} [/tex]
how to find the number of atoms present in 22g of co2
Answer:
22g of 2
C
O
2
have 3.011×1023
3.011
×
10
23
2
C
O
2
molecules.
Explanation:
Hope this helps! ^^
Which evidence shows that heat is given off when a candle burns?
A. A match is used to light the candle.
B. The burning candle produces a yellow flame.
O c. Covering the burning candle extinguishes the flame.
D. Solid candle wax near the flame melts as the candle burns.
thing
Answer:
D. solid candle wax near the flame melts as the candle burns.
Answer:
Part D, melting is a product of heating
Explanation:
What is the cost in dollars for the nails used to build a fence 80 meters long if it requires 30 nails per meter? There are 40 nails per box at a cost of 75 cents per box
Answer:
4500 cent
Explanation:
From the question, we were told that
a fence 80 meters long requires 30 nails per meter.
1 metre fence = 30 nails
Then 80 meters long= ( 30 × 80)
= 2400 nails
Which means a fence 80 meters long will require 2400 nails in total.
We need to find the cost in dollars for the nails to build a fence 80 meters long.
We know that 40 nails per box will cost 75 cents per box.
(2400 nails/40 nail per box)= 60 box
Then 60 box will be needed to complete the fence.
the cost in dollars for the nails to build a fence 80 meters long= (60 box × 75 cent per box)=4500 cent
Can someone help?? This is really hard.
Answer:
See Explanation
Explanation:
Let us consider the first two reactions, the initial concentration of CO was held constant and the concentration of Hbn was doubled.
2.68 * 10^-3/1.34 * 10^-3 = 6.24 * 10^-4/3.12 * 10^-4
2^1 = 2^1
The rate of reaction is first order with respect to Hbn
Let us consider the third and fourth reactions. The concentration of Hbn is held constant and that of CO was tripled.
1.5 * 10^-3/5 * 10^-4 = 1.872 * 10^-3/6.24 * 10^-4
3^1 = 3^1
The reaction is also first order with respect to CO
b) The overall order of reaction is 1 + 1=2
c) The rate equation is;
Rate = k [CO] [Hbn]
d) 3.12 * 10^-4 = k [5 * 10^-4] [1.34 * 10^-3]
k = 3.12 * 10^-4 /[5 * 10^-4] [1.34 * 10^-3]
k = 3.12 * 10^-4/6.7 * 10^-7
k = 4.7 * 10^2 mmol-1 L s-1
e) The reaction occurs in one step because;
1) The rate law agrees with the experimental data.
2) The sum of the order of reaction of each specie in the rate law gives the overall order of reaction.