Answer:
firstly for separating fillings we should use
magnet for separating it, and we left with sulphur and salt so for this we will use water
when we add water then salt get dissolve in it and we can easily take out sulphur again by evaporation we will obtain salt
hope it helps
Describe the energy in nuclear fuel and the way in which it’s converted to electrical energy. Write 50 to 100 words.
Explanation:
You will have to rewrite this in your own words please. Download the app Paraphrase and also download Plagiarism Checker. Go on Paraphrase first and write it out then go to Plagiarism second and it'll tell you if you still need to reword it.
Answer:
A nuclear reactor produces electricity in much the same way other power plants do. The chain reaction produces the energy, which turns water into steam. The pressure of the steam turns a generator, which produces electricity.
Explanation:
Nuclear energy originates from the splitting of uranium atoms a process called fission. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant. At the center of the reactor is the core, which contains uranium fuel. The uranium fuel is formed into ceramic pellets. Inside each uranium fuel pellet, there are millions of uranium nuclei. When these nuclei are split, a huge amount of energy is released. Some of this energy is from radiation, but the biggest source is kinetic energy. This is the energy that produces heat inside a reactor. The heat produced during nuclear fission in the reactor core is used to boil water into steam, which turns the blades of a steam turbine. As the turbine blades turn, they drive generators that make electricity. Nuclear plants cool the steam back into water in a separate structure at the power plant called a cooling tower, or they use water from ponds, rivers, or the ocean. The cooled water is then reused to produce steam.
Sarah is running a race and is almost to the finish line. In the last 5 seconds, her velocity changes from 2m/s to 4m/s. What is her average acceleration during the last 5 seconds of the race?
Answer:
[tex]\boxed {\boxed {\sf a= \frac {2}{5} \ or \ 0.4 \ m/s^2}}[/tex]
Explanation:
Acceleration is found by dividing the change in velocity by the time. The formula is:
[tex]a= \frac {v_f-v_i}{t}[/tex]
where [tex]v_f[/tex] is the final velocity, [tex]v_i[/tex] is the initial or starting velocity, and [tex]t[/tex] is the time.
Her velocity changes from 2 meters per second to 4 meters per second in the 5 seconds. Therefore:
[tex]v_f= 4 \ m/s \\v_i= 2 \ m/s \\t=5 \ s[/tex]
Substitute the values into the formula.
[tex]a= \frac { 4 \ m/s- 2 \ m/s}{5 \ s}[/tex]
Solve the numerator and subtract.
[tex]a= \frac { 2 \ m/s}{5 \ s}[/tex]
Divide.
[tex]a= \frac{2}{5} \ m/s/s= \frac{2}{5} \ m/s^2[/tex]
This can also be written as a decimal.
[tex]a=0.4 \ m/s^2[/tex]
Her average acceleration during the last 5 seconds of the race is 2/5 or 0.4 meters per square second.
Answer:
Solution :-Here
Initial velocity = 2 m/s
Final velocity = 4 m/s
Time = 5 sec
v = u + at
4 = 2 + a(5)
4 - 2 = a(5)
2 = 5a
2/5 = a
Hence, acceleration is 2/5 m/s²
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
OV
Na
Mg
Se
Save and Frit
Answer:
Na
Explanation:
Sodium
What will the nervous system feedback do when the human body's temperature drops just below its normal range? Plssss help
Answer:
Homeostasis
Explanation:
The blood vessels constrict and you start to shiver, that shivering generates heat to warm the body to help to body temperature go back to normal. Homeostasis is the condition of keeping your body at a normal condition.
molecular formula of CH2O, 120 g/mol
9)
How many grams are in 4.5 moles of sodium hydroxide (NaOH)?
Answer:
179.986995
Explanation:
1 mole is equal to 39.99711 grams.
so muitiply 39.99711 by 4.5 and get 179.986995
Can you identify what object is being represented by the model on the right? gear clock battery
Answer:gear
Explanation:just did it right now
Answer: Gear
Explanation: just did it on Edge 2021
What is the molarity of a solution in which 175.8
grams of NaCl is dissolved in 1.5 L of water?
What is the empirical formula for H2SO4? Explain.
Answer: The empirical formula is H2SO4 only.
Explanation: Because it is the simplest ratio of atoms of elements in a compound.
One orbit of the earth around the sun equals _____________ miles.
595 million
360 million
5,280
Answer:
it's about 580millon, but the closest you have is 595 million, so pick that one
Answer:
should be 595 !
Explanation:
Given the reaction: 4 NH3(g) + 5 O2(g) → 4 NO (g) + 6 H2O When 1.20 mole of ammonia reacts, how many moles of water are produced?
Answer:
When 1.20 mole of ammonia reacts, 1.8 moles of water are produced.
Explanation:
The balanced reaction is:
4 NH₃(g) + 5 O₂(g) → 4 NO (g) + 6 H₂O
By stoichiometry of the reaction, the following amounts of moles participate in the reaction:
NH₃: 4 moles O₂: 5 molesNO: 4 molesH₂O: 6 molesThen you can apply the following rule of three: if by stoichiometry 4 moles of ammonia produce 6 moles of water, 1.2 moles of ammonia will produce how many moles of water?
[tex]moles of water=\frac{1.2 moles of ammonia*6 moles of water}{4 moles of ammonia}[/tex]
moles of water= 1.8 moles
When 1.20 mole of ammonia reacts, 1.8 moles of water are produced.
Balance the following skeletal equation:
Li(s) + H2O(1) -------> -------> LiOH(aq) + H2(g).
Answer:
I think above answer is fully correct. Mark it brainliest
What is the pH of a 0.30 M solution of Ca(OH)2?
Explanation:
30 to the second power
Which of the following represents an increase in kinetic energy?
A. Cooling steam from 165°C to 100°C
B. Melting 45g of ice
C. Condensing 60g of steam
D. Heating ice from -50°C to 0°C
Answer:
C
Explanation:
7. A certain hydrocarbon, CxHy, is burned (reacts with O2 gas) and produces 1.955 g of CO2 for every
1.000 g of H20. What is the empirical formula of this hydrocarbon?
CxHy + (X + y/4) O2 -> xCO2 + y/2 H2O
Answer:
The empirical formula of the hydrocarbon is C₂H₅
Explanation:
The formula for the hydrocarbon is [tex]C_xH_y[/tex]
The mass of CO₂ produced per 1,000 g of H₂O = 1,955 g
The equation for the chemical reaction is given as follows;
[tex]C_xH_y[/tex] + (x + y/4) O₂ → XCO₂ + y/2H₂O
From the given chemical equation, counting the number of atoms on both sides of the equation, we have;
The molar mass of CO₂ = 44.01 g/mol
The molar mass of H₂O = 18.01528 g/mol
The number of moles of H₂O in 1,000 g of H₂O = 1,000 g/(18.01528 g/mol) = 55.5084351 moles
The number of moles of CO₂ in 1,955 g of H₂O = 1,955 g/(44.01 g/mol) = 44.4217223 moles
Therefore, given that X moles of CO₂ is produced alongside Y/2 moles of H₂O. we have;
X = 44.4217223, Y/2 = 55.5084351
∴ Y = 2 × 55.5084351 = 111.0168702
The ratio of X to Y = X/Y = 44.4217223/111.0168702 = 0.40013488238
∴ The ratio of X to Y = X/Y ≈ 0.4 = 4/10
X/Y ≈ 4/10
The empirical formula is the representation of molecular formula in the smallest whole number ratio of the elements of the molecules
Therefore, when X = 4, Y = 10, from which we have the smallest ratio as;
When X = 2, Y = 5
The empirical formula of the hydrocarbon is therefore, [tex]C_xH_y[/tex] = C₂H₅
The given chemical equation becomes;
C₂H₅ + (2 + 5/4) O₂ → 2CO₂ + 5/2H₂O
C₂H₅ + 3.25 O₂ → 2CO₂ + 2.5 H₂O
We then have;
4C₂H₅ + 13 O₂ → 8CO₂ + 10 H₂O
The empirical formula of the hydrocarbon, [tex]C_xH_y[/tex] = C₂H₅.
In the compound AbO3, the ratio of aluminum to
oxygen is
A) 3 moles of aluminum to 2 moles of oxygen
B) 2 moles of aluminum to 3 moles of oxygen
C) 2 grams of aluminum to 3 grams of oxygen
D) 3 grams of aluminum to 2 grams of oxygen
Answer:
c
Explanation:i got it right ony my test
The formula of a compound is M(OH)2 . Given that the Mr of compound is 98 , calculate Ar of M. (Ar of O = 16 , H = 1 ) WITH WOKING OUT
Answer:
The atomic weight Ar, of M is 64
Explanation:
The formula of the given compound is M(OH)₂
Mr, is the molecular weight of a compound and for the given compound, Mr is equal to 98.
Ar, is the atomic weight of the elements in the compound
The molecular weight, Mrof a compound is the mass of one mole mole of that compound. It can be obtained by summing the atomic masses of all elements in that compound. For elements that has more than one atom in the compound, the atomic weight of that element is multiplied by the number of atoms of the element present in the compound and then the sum of the weight of each element gives the molecular weight of the compound.
Onnthe compound above,the atomic weight of the unknown element M, is to be obtained.
Ar of the other elements inn he compound is given : Ar of O = 16, Ar of H = 1.
Molecular weight of the compound, Mr = 98
Calculating for the Ar of M:
(M × 1) + (16 × 2) + (1 × 2) = 98
M +32 + 2 = 98
M + 34 = 98
M = 98 -34
M = 64
Therefore, the atomic weight Ar, of M is 64
For the night yet balanced equation, No + CuCl2 —> Cu + NiCl3, if you started with 12.00 g of nickel and 42.00 g of CuCl2, how much Copper would you expect to produce Perdue
Answer:
19.45g of Cu are expect to be produced
Explanation:
Based on the reaction:
2Ni + 3CuCl2 → 3Cu + 2NiCl3
2 moles of Ni react with 3 moles of CuCl2 to produce 3 moles of Cu
To solve this question we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of Cu produced and the mass as follows:
Moles Ni -Molar mass: 58.6934g/mol-
12.00g * (1mol / 58.6934g) = 0.204 moles Ni
Moles CuCl2 -Molar mass: 134.45g/mol-
42.00g * (1mol / 134.45g) = 0.312 moles CuCl2
For a complete reaction of 0.204 moles of Ni are required:
0.204 moles Ni * (3 moles CuCl2 / 2 moles Ni) = 0.306 moles of CuCl2
As there are 0.312 moles, CuCl2 is the excess reactant and Ni is limiting reactant.
Moles Cu:
0.204 moles Ni * (3moles Cu / 2 moles Ni) = 0.306 moles of Cu are produced
Mass Cu:
0.306 moles of Cu * (63.546g / mol) =
19.45g of Cu are expect to be producedWrite the expressions for the equilibrium constants of the reactions below.
a. N2 + 3H2 ⇌ 2NH3
b. Br2 + H2 ⇌ 2HBr
c. CO + H2O ⇌ H2 + CO2
In general, for a given chemical reaction in equilibrium
[tex]aA + bB \rightleftharpoons cC + dD[/tex]
the equilibrium constant, Keq, will be
[tex]K_{eq}=\frac{\mathrm{[C]^c}[D]^d}{\mathrm{[A]^a[B]^b}}.[/tex]
Usually, only aqueous and gaseous species are included in the equilibrium constant; the concentration of any pure solid or liquid is omitted. While the states of the reactants and products in the reactions for this problem aren't given, these three particular reactions all happen to be ones where they can (and, in fact, do) occur where all the species are in the gaseous state. So, all the reactants and product(s) are included in the equilibrium constants below, but this will not always be the case.
a.
[tex]K_{eq}=\frac{\mathrm{[NH_3]^2}}{\mathrm{[N_2][H_2]^3}}[/tex]
b.
[tex]K_{eq}=\frac{\mathrm{[HBr]^2}}{\mathrm{[Br][H_2]}}[/tex]
c.
[tex]K_{eq}=\frac{\mathrm{[H_2][CO_2}]}{\mathrm{[CO][H_2O]}}[/tex]
The equilibrium constant has to do with the value that shows the extent to which reactants are converted into products.
What is equilibrium constant?The term equilibrium constant has to do with the value that shows the extent to which reactants are converted into products.
The following are the expressions for the equillibrium constant of each reaction;
[tex]K = [NH3]^2/[N2] [H2]^3[/tex][tex]K = [HBr]^2/[Br2] [H2][/tex][tex]K= [H2] [CO2]/[CO] [H2O][/tex]Learn more about equilibrium constant:https://brainly.com/question/10038290
#SPJ2
Balance the following chemical equation by providing the correct coefficients.
[ ]Na+[ ]H2O -> [ ] NaOH + [ ]H2
Answer:
[2 ]Na+[2 ]H2O -> [ 2] NaOH + [1]H2
What is to dissolve?
Answer:
(with reference to a solid) become or cause to become incorporated into a liquid so as to form a solution.
Slow cooling of magma leads to the formation of large crystals, such as halite and calcite.
Select the correct response:
True
False
Increase the coefficient for NH3. Look at
the balance labeled "H" (for hydrogen).
Why are there now 3 hydrogen atoms on
the right side of the balance but 0 on the
left side?
Answer:
I don't know please you tell me just joking
Why might the ability to produce three-dimensional images of organs be helpful in diagnosing a patient's ailment?
Answer:
Explanation: The body is largely composed of water molecules. Each water molecule has two hydrogen nuclei or protons. MRI takes advantage of the high prevalence of hydrogen in the body and the magnetic properties of the proton in a hydrogen atom. Hydrogen atoms induce a small magnetic field due to the spin of this atom's proton.
Calculate the volume in mL of 53.2 g of .251M solution of HCl.
Show work please
Answer:
5.813 mL
Explanation:
You need to use the formula : vol = mass / molar mass x molarity
the molar mass of HCl is 36.46 and the problem gives you the rest of the equation
0.251M x 36.46 = 9.151
53.2g / 9.151 = 5.813 mL
*I don't know some of the units so that's why some of them are blank sorry
*I'm also sorry if this is wrong but it's what I did so..
How many grams are in 5 mole of carbon dioxide? (CO2)
plz include your work
Answer: Hence, mass of CO2 is 22g.
Explanation: N/A
Answer:
mole=mass/RMM
5mole =mass/44
mass= 44×5=220grams
Explanation:
Co2 molecular weight =44 ,cross multiply then you get your mass.
Can you help me out with gravity study!?
Awnser 4 questions only please!
Answer:
F
T
F
T
Explanation:
i hope these are right
How many grams of Ca metal are produced by the electrolysis of molten CaBr2 using a current of 30.0 amp for
5.50 hours?
Answer: 123 g
Explanation: Q =It = nzF. For Ca^2+ z= 2, t = 5.5 x 3600 s and I = 30.0
And F= 96485 As/mol
Amount of moles is n = It /zF = 3.078 mol , multiply with atomic mass 40.08 g/mol
How many liters of O2 would be needed to produce 5.75 moles of K₂O?
Answer:
just 1
Explanation:
differentiate between a promoter and an inhibitor
Promoters are substances that increase the catalytic activity, even though they are not catalysts by themselves.
Inhibitors are sometimes referred to as "negative catalysts" since they decrease the reaction rate.