Convert 25 g CO2 to moles CO2
3. Look at the reaction below:
H2O + C —— CO+ H2
AH = +130kJ mol^-1
Explain what happens to the position of equilibrium if we:
a. increase the pressure
b. increase the concentration of hydrogen gas
c. increase the temperature
d. add a catalyst
Explanation:
a. pressure always favors the side with fewer molecules. in this reaction as both the sides have equal number of molecules, there won't be any change in the position of the equilibrium.
b. when the concentration of the hydrogen gas is increased. more particles would take place in the reaction and so, the rate of reaction would increase favoring the reaction concerning hydrogen gas molecules (backward reaction in this case) therefore, equilibrium would shift to the backward reaction (left).
c. as forward reaction is endothermic, when temperature is increased the equilibrium will shift to the forward reaction (right).
d. catalyst would not have any effect on the position of the equilibrium. it will only increase the rate of reaction.
hope it helps. :)
2. Which answer is NOT the definition for one of these terms: volcano,
lava, magma?
O a crack or fracture in the Earth's crust where movement occurs
molten rock stored beneath Earth's surface
magma that erupts on Earth's surface
vents in Earth's crust through which molten rock flows
Life cycles are:
random
divided into two stages
predictable
exactly the same for all species
You are given a stock solution of 500.0 mL of 1.00M magnesium chloride solution. Calculate the volume of the stock solution you would need to use to prepare 250.0 mL of 0.20 M solution.
Answer:
[tex]50\; \rm mL[/tex] of the stock solution would be required.
Explanation:
Assume that a solution of volume [tex]V[/tex] contains a solute with a concentration of [tex]c[/tex]. The quantity [tex]n[/tex] of that solute in this solution would be:
[tex]n = c \cdot V[/tex].
For the solution that needs to be prepared, [tex]c = 0.20\; \rm M = 0.20\; \rm mol \cdot L^{-1}[/tex]. The volume of this solution is [tex]V = 250.0\; \rm mL[/tex]. Calculate the quantity of the solute (magnesium chloride) in the required solution:
[tex]\begin{aligned}n &= c \cdot V \\ &= 0.20\; \rm mol \cdot L^{-1} \times 250.0\; \rm mL \\ &= 0.20\; \rm mol \cdot L^{-1} \times 0.2500\; \rm L \\ &= 0.050\; \rm mol\end{aligned}[/tex].
Rearrange the equation [tex]n = c \cdot V[/tex] to find an expression of volume [tex]V[/tex], given the concentration [tex]c[/tex] and quantity [tex]n[/tex] of the solute:
[tex]\displaystyle V= \frac{n}{c}[/tex].
Concentration of the solute in the stock solution: [tex]c(\text{stock}) = 1.00\; \rm M = 1.00\; \rm mol \cdot L^{-1}[/tex].
Quantity of the solute required: [tex]n = 0.050\; \rm mol[/tex].
Calculate the volume of the stock solution that would contain the required [tex]n = 0.050\; \rm mol[/tex] of the magnesium chloride solute:
[tex]\begin{aligned}& V(\text{stock}) \\ &= \frac{n}{c(\text{stock})} \\ &= \frac{0.050\; \rm mol}{1.00\; \rm mol \cdot L^{-1}} \\ &= 0.050\; \rm L \\ &= 50\; \rm mL\end{aligned}[/tex].
32. Explain why carbon shows versatile nature why it forms so many organic compounds.
Answer:
Carbon is a versatile element and is found in many different chemical compounds, including those found in space. Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings when connected to other carbon atoms.
Explanation:
meaning of versatile: capable of or adapted for many different uses, skills, etc. 2 variable or changeable.
The versatile nature of carbon can be best understood with its features such as, tetravalency and catenation. In this section let us learn more about versatility of carbon.
Carbon is a versatile element and is found in many different chemical compounds, including those found in space. Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings when connected to other carbon atoms.
The two characteristic features seen in carbon, that is, tetravalency and catenation, put together give rise to a large number of compounds. Many have the same non-carbon atom or group of atoms attached to different carbon chains.
Catenation: The property of forming long chains by self-linking with other carbon atoms to form long chains, rings, double or triple bonds is called catenation.
Isomerism: Compounds with same molecular formula but different structural formula are called isomers. An isomerism commonly seen is due to difference in the arrangement of atoms or groups of atoms & is called structural isomerism. The 4 types of structural isomerism are:
Chain isomerism
Position
Functional
Metamerism
Tetravalency: Carbon has 4 electrons in its valence shell. Energy considerations do not allow it to gain or lose 4 electrons; therefore it forms covalent bonds with other elements to complete its octet. This accounts for its tetravalency and explains its ability to form a variety of compounds.
Rank the following elements by decreasing metallic character: Cesium (C's), Bromine (Br), Osmium (Os), Tin (Sn)
Answer:
Cs, Os, Sn, Br
Explanation:
Metallic character increases to the left and down the periodic table.
What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?
Answer:
The nucleus splits into two or more lighter nuclei, releasing kinetic energy, gamma radiation, and free neutrons. A portion of these neutrons may later be absorbed by other fissile atoms and trigger further fission events, which release more neutrons, and so on. This is known as a nuclear chain reaction.
Explanation:
the volume of alcohol present in 409ml of 11%
Answer:
Amount of Alcohol volume present in solution = 44.99 ml
Explanation:
Given:
Total volume of solution = 409 ml
Amount of Alcohol percentage present in solution = 11%
Find:
Amount of Alcohol volume present in solution
Computation:
Amount of Alcohol volume present in solution = Total volume of solution x Amount of Alcohol percentage present in solution
Amount of Alcohol volume present in solution = 409 x 11%
Amount of Alcohol volume present in solution = 409 x 0.11
Amount of Alcohol volume present in solution = 44.99 ml
12 Mixture 1 contains sand and water
Mixture 2 contains salt and water
Which method of separation could be used to obtain each of the required products from each
mixture?
mixture 2
10 ottain sand
to obtam water
to obtain salt
to obtain water
crystalisation
distillation
filtration
fiftration
B
crystalisation
filtration
fitration
distillation
Ty tallation
Crystallisation
Answer:
B i tyink
Explanation:
brainlyest plssss
To obtain sand and water from mixture 1 , filtration process will be used.
To obtain salt from water in mixture 2 , crystallisation will be done.
What is physical treatment process?Physical wastewater treatment processes include use of racks, screens, clarifiers (sedimentation and flotation), and filtration. Chemical or biological reactions are important treatment processes, but not part of a physical treatment process.
It is given that the mixture contains
Mixture 1 contains sand and water
Mixture 2 contains salt and water
To obtain sand and water from mixture 1 , filtration process will be used.
To obtain salt from water in mixture 2 , crystallisation will be done.
To know more about Physical Treatment Process
https://brainly.com/question/23858244
#SPJ2
2) What is the mass of a sample that produces -1,500 J if the specific heat is 1.0 and the temperature decreases by 30℃?
3) What is the specific heat (C) of silver if we heat a 16g cube from 45 oC to 80 oC and it absorbs 41.3 J of thermal energy?
Answer:
(2) 50 kg
(3) 73.75 J/kg.K
Explanation:
(2) From the question,
Using,
q = mcΔt........................ Equation 1
Where q = amount of heat, m = mass. c = specific heat capacity, Δt = change in temperature
make m the subject of the equation
m = q/(cΔt)..................... Equation 2
Given: q = 1.500 J, c = 1.0 J/kg.K, Δt = 30°C
substitute these values into equation 2
m = 1500/(1×30)
m = 50 kg
(3) using
q = cm(t₂-t₁).
Where t₁ and t₂ = initial and final temperature respectively
making c the subject
c = q/m(t₂-t₁)................ Equation 3
Given: q = 41.3 J, m = 16 g = 0.016 kg, t₂ = 80°C, t₁ = 45°C
Substitute these values into equation 3
c = 41.3/0.016(80-45)
c = 41.3/0.56
c = 73.75 J/kg.K
Michelle learns in science class that simple machines such as an inclined plane can change the amount of force needed to lift heavy objects. She decides to test this with an experiment.
Michelle chooses a 10 kg weight. She sets up a ramp made of smooth metal that makes an angle θ with the floor. She attaches a spring scale to the weight and the top of the ramp in order to hold the weight in place. She records the force from the spring scale, then changes θ and records it again. She repeats this several times.
In this experiment, what is the outcome variable (dependent variable)?
A.
the angle θ between the ramp and the ground
B.
the mass of the weight
C.
the material the ramp is made of
D.
the amount of force on the spring scale
PLEASE I NEED HELP ON THIS RN AND IT'S DUE TODAY!!!!!!!!
IF YOU POST ANY LINKS THAT ARE PERM-BLOCKED, I WILL REPORT YOU, TAKE YOUR POINTS AWAY, DELETE YOUR ANSWER, AND PROBABLY BAN YOU! IF YOU DO NOT KNOW, DON'T ANSWER!!!!!!!
Answer: the amount of force on the spring scale
Explanation:
what is unique about an elements structure?
Explanation:
Atomic Number and MassEach element has its own unique properties. Each contains a different number of protons and neutrons, giving it its own atomic number and mass number. The atomic number of an element is equal to the number of protons that element contains.
What is an energy conserved system ?
Answer: In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.
Explanation:
internet
If 5.0 g of copper metal reacts with a solution of silver nitrate, how many grams of silver metal are recovered?
Cu + Ag(NO3)2=Cu(NO3)2 + Ag
Answer:
16.9g
Explanation:Cu+2AgNO3→2Ag+Cu(NO3)2
Cu will likely have a +2 oxidation state. It is higher in the activity series than Ag, so it is a stronger reducing agent and will reduce Ag in a displacement reaction. Then you need to balance the coefficients knowing than NO3 is -1 and Ag is +1.
Then to calculate the theoretical yield you need to compare moles of the reactants:
m(Cu)=5g
M(Cu)=63.55
n(Cu)=5/63.55=0.0787
By comparing coefficients you require twice as much silver: 0.157mol
n(Ag)=0.157
M(Ag)=107.86
m(Ag)=0.157x107.86=16.9g
Hence, the theoretical yield of this reaction would be 16.9g
4NH3(g) + 6NO(g)→5N2(g) + 6H2O(g) Using the balanced equation calculate the mass of N2 produced from 100 grams of NH3 racing with an unlimited supply of NO.
Here's link to the answer:
bit.[tex]^{}[/tex]ly/3a8Nt8n
Consider the one step reaction aA Arrow in between) B with the following rate law Rate=k(A)^x. When the initial concentration of A is increased from 0.35 mol\L to 0.7 mol\L, the initial rate increases from 1.6 mol\(L.s) to 3.2 mol\(L.s). What is the order of the reaction with respect to A? What is the overall order of the reaction?
PLEASE HELP. It is due tomorrow and I can't figure it out. please SHOW YOUR WORK so I can understand how its done. I will mark brainiest.
Answer:
I think its A
Explanation:
The reaction is a first-order reaction with respect to "A" and an overall first-order reaction.
What is the rate law?The rate law is given as Rate = k(A)ˣ, where k is the rate constant and x is the order of the reaction with respect to A.
Let's first find the initial rate for the first concentration of A, which is 0.35 mol/L.
1.6 mol/(L.s) = k(0.35 mol/L)ˣ ....(i)
Now let's find the initial rate for the second concentration of A, which is 0.7 mol/L. We have:
3.2 mol/(L.s) = k(0.7 mol/L)ˣ ....(ii)
Dividing equation (ii) by equation (i),
3.2 / (1.6) = (k(0.7)ˣ) / (k(0.35)ˣ)
2 = (0.7/0.35)ˣ
2 = 2ˣ
x = 1
Thus, the order of the given reaction with respect to A is 1.
Since the overall order of the reaction is added up to the orders of all the reactants.
Here, we only have one reactant, which is A, and its order is 1.
So, the overall order of the reaction is also 1.
Hence, the reaction is a first-order reaction with respect to "A" and an overall first-order reaction.
Learn more about the rate of concentration here:
https://brainly.com/question/14905790
#SPJ2
Need ASAP
What is the mass of NaCl required to make 160 grams of a 32% solution of NaCl in water?
Answer: 19.20 g. Explanation: ∵ mass % = [mass of solute/mass of solution] x 100.Apr 30, 2019
Explanation: I don't know if this helped but uh yeah.
Lance wants to separate out the salt from a solution of salt water how can he do this
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer: Boiling the water
I hope this helped!
<!> Brainliest is appreciated! <!>
- Zack Slocum
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Earth's atmosphere mainly gives off (radiates) which form of energy?
Answer:
infrared energy
Explanation:
Three facts about Dalton’s Model of the Atom:
Explanation:
Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. The atoms of different elements vary in size and mass. Compounds are produced through different whole-number combinations of atoms.
hope this helps you
have a nice day:)
Find the number of moles in 1.00 x 1023 atoms of chromium.
Answer:
0.17 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{1.00 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{1}{6.02} \\ = 0.166112[/tex]
We have the final answer as
0.17 molesHope this helps you
Solution (a) has a hydrogen ion concentration of 2.7 x 10^-3 and solution (b) has a hydrogen ion concentration of 4.1 M. What are their pH and say if they are acids or bases.
Answer: a) pH = 2.56 , acidic
b) pH = 2.38, acidic
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
a) [tex][H^+]=2.7\times 10^{-3}[/tex]
Putting in the values:
[tex]pH=-\log[2.7\times 10^{-3}][/tex]
[tex]pH=2.56[/tex]
Thus as pH is less than 7, the solution is acidic.
b) [tex][H^+]=4.1\times 10^{-3}[/tex]
Putting in the values:
[tex]pH=-\log[4.1\times 10^{-3}][/tex]
[tex]pH=2.38[/tex]
Thus as pH is less than 7, the solution is acidic.
Michell saw a model of a skeleton in a science store. She counted the bones in the skeleton. There were 206. Which is NOT something the 206 bones in our skeletons do?
A. support the body
B. help the body move.
C. regulate temperature.
D. protect internal organ
Help me!!!
Answer:
C, regulate temperature
Explanation:
Bones take no part in temperature regulation throughout the body.
5 characteristics of salt
Answer:
salty and
Crystals or white crystalline powder.
Transparent and colourless in crystalline form – rather like ice.
Crystallises in the isometric system, usually in the form of cubes.
Soluble in water (35.6g/100g at 0°C and 39.2g/100g at 100°).
Slightly soluble in alcohol, but insoluble in concentrated hydrochloric acid.
Explanation:
Answer:
sea salt, black salt I only know two of them
d. 2 5. How many moles of HCl are needed to produce 25 moles of KCl in the presence of excess potassium permanganate? a. 16 b. 32 c. 5 d. 200
Answer:
d. 200.
Explanation:
The reaction is:
2KMnO4 + 16HCl ----> 2KCl + 2MnCl2 + 8H2O + 5Cl2
So 2 moles of KCL are produced form 16 moles of HCL
So 25 moles KCL are made from 25 * (16/2) HCl.
= 25 * 8
= 200 moles. HCl.
In the set up below, which air should show an increase in temperature?
Answer:
My guess is A.
Explanation:
In which state of matter does an object have a fixed volume and a fixed shape?
i need help i got these wrong on my first attempt
Meteorite: One the surface of Earth
Meteoroid: In outer space
Meteor: Entering Earths atmosphere
Explanation:
What is the correct formula for the compound made of magnesium and nitrogen
Answer:
Mg3N2
Explanation:
it has an inorganic compound for Magnesium and Nitrogen. if you put this two together it will the compound Magnesium nitride.