Answer:
I think the Molar mass of H₂CO₂ should be 62..
Explanation:
I'm not too sure tho... Hope this helps!
How to draw ethyl pentanoate?
Matter can undergo chemical reactions and nuclear reactions. Which statement is true only for nuclear reactions?
A - The mass of reactants is conserved
B - The energy of reactants is conserved
C - The atoms are reorganized into products.
D - The nuclei of the atoms.
Answer:
B - The energy of reactants is conserved.
D - the nuclei of atoms changes completely ( if that's the option)
Calculate the ionization constant of each reaction. hcl (aq) + h2o (l) equation h3o+ (aq) + cl- (aq); [hcl] = 16.9m, [h3o+] = 13.3m, [cl-] = 7.4mka =
The ionization constant from the reaction as shown in the calculation is 5.8.
What is the ionization constant?The term ionization constant refers to the extent to which the acid is ionized in solution. It is calculated from;
Ka = [H3O^+] [Cl]/[HCl]
Thus when we substitute the values;
Ka = 13.3 * 7.4/ 16.9
Ka = 5.8
The ionization constant from the reaction as shown in the calculation is 5.8.
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Can anyone please help me find molar masses of compounds. For example Copper (ll) sulfate (CuSO4)
Answer:
Explanation:
You would have to add up the atomic masses of all the compounds in the compound, making sure you include how many molecules of each are in the compound
For example, in CuSOA we have 1 molecule of Cu and S, as 4 molecules of O
The atomic masses are as follows:
Cu = 63.55 u
S = 32.065 u
O = 15.99 units
This is how we would add it up:
(Atomic mass of Cu) + (Atomic mass of S) + 4(Atomic Mass of O)
(63.55) + (32.065) + 4(15.99)
(63.55) + (32.065) + 63.96
= 159.575 u
Calculate the temperature change of copper metal that has a mass of 43.2 g and is allowed to absorb 1,345 J of heat. The specific heat capacity of copper is 0.385 J/°c g.
Answer: 80.9 K
Explanation:
[tex]Q=mc \Delta T\\\\1345=(43.2)(0.385) \Delta T\\\\\Delta T=\frac{1345}{(43.2)(0.385)} \approx \boxed{80.9 \text{ K}}[/tex]
At what temperature would 0.46 moles of a gas occupy 13.3 L if the pressure is 734 mm Hg?
Answer: 341.6k
Explanation:
R= 0.0821
n= 0.46moles
v= 13.3L
p= 734mmhg = 734/760 = 0.97
[tex]T = \frac{p*v}{n*R}[/tex]
[tex]T = \frac{0.97*13.3}{0.46*0.0821}[/tex]
T= 341.6k
Answer:
10100101
Explanation:
this is for the other person alt.
31. calculate the amount of energy released as heat by the freezing of 13.3 g of a liquid substance, given that the substance has a molar mass of 82.9 g/mol and a molar enthalpy of fusion of 4.60 kj/mol.
From the calculations, the heat of fusion of the substance is 0.73 kJ
What is is the heat of freezing?The heat of freezing is the energy released when the substance is converted from liquid to solid.
Now we know that the molar mass of the substance is 82.9 g/mol hence the number of moles of the substance is; 13.3 g /82.9 g/mol = 0.16 moles
Now the heat of fusion shall be;
H = 4.60 kj/mol * 0.16 moles
H = 0.73 kJ
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covers 70 precent of earths surface
Answer:
Water covers 70 percent of earth's surface.The process of seeping of water into the ground in called
Answer: Infiltration
Explanation: it is the process by which surface water, rainwater or snowmelt seeps into the ground
what is indicated by the methyl- prefix
Answer:
B
Explanation:
The methyl prefix means theres a CH3 group bonded to a carbon in a hydrocarbon. This is called branching because it looks like a branched tree. This is literally cheating but you do you.
How is the modern periodic table different from Dmitri Mendeleev's table?
A. Elements that have similar properties are now grouped together.
O B. Elements are now organized by increasing atomic mass.
OC. The lanthanides and actinides are now in rows below the main
table.
D. The table is now used to predict the properties of elements.
Elements are now organized by increasing atomic mass. Hence, option B is correct.
What is a periodic table?The periodic table is a tabular array of chemical elements organized by atomic number.
Mendeleev's periodic table orders the elements based on their atomic mass whereas the Modern periodic table orders the elements based on their atomic number.
Hence, option B is correct.
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Describe the properties of alkali metals. based on their electronic arrangement, explain whether they exist alone in nature.
The alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.
What are the properties of alkali metals?The alkali metals have the high thermal and electrical conductivity. It has high lustre, ductility, and malleability as compared to other materials. Each alkali metal atom has one electron in its outermost shell which make more reactive.
So we can conclude that the alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.
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Which of the following lists electromagnetic radiations from lowest to highest energy?
Your answer:
radio waves, microwaves, ultraviolet radiation, visible light
microwaves, radio waves, visible light, X-rays
radio waves, infrared radiation, visible light, ultraviolet radiation
gamma radiation, infrared radiation, visible light, X-rays
Answer:
Highest wavelength : radio waves
So lowest energy: radio waves
Hence order is:
radio waves < microwaves < IR waves < visible light < ultraviolet radiation < X-rays < gamma rays
9. (05.06 mc)
during an experiment, the percent yield of calcium chloride from a reaction was 80.34%. theoretically, the expected amount should have been 115 grams. what was the actual yield
from this reaction?
caco, + hc - cacl + co, + h20 (5 points)
a. 090.1 grams
b. 92.4 grams
c. 109.2 grams
d. 115.3 grams
The actual yield of the experiment given the data from the question is 92.4 g (Option B)
What is percentage yield?This is the ratio of the actual yield to the theoretical yield of a given reaction multiplied by 100
Percentage yield = (Actual / Theoretical) × 100
What is actual yield?This is the amount obtained from the expriment procedures
What is theoretical yield?This is the amount obtained from simple calculations as regarding the experiment.
How to determine the actual yieldPercentage yield = 80.34%Theoretical yield = 115 gActual yield =?Actual yield = percentage yield × theoretical yield
Actual yield = 80.34% × 115
Actual yield = 0.8034 × 115
Actual yield = 92.4 g
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What is the nuclear equation for decay of Am - 241
Americium is a radioactive element .
It goes through alpha decay during nuclear reactions .The nuclear reaction.is given by
[tex]\rm {}^{241}_{95}Am\longrightarrow {}^{237}_{93}Np+{}^4_2\alpha[/tex]
Np stands for NuptuniumHere alpha can be written as He too
A solvent is added to dissolve only one mixture component and then the liquids are separated. Choose... A liquid is carefully poured out, leaving the solid behind in the container. Choose... A solid is caught on paper or a membrane while the liquid passes through. Choose... A solid mixture is heated. One component transitions directly between solid and gas. Choose...
The solid would be caught on a filter paper or membrane while the liquid passes through.
FiltrationFiltration is used to separate a mixture of insoluble substances in a liquid.
Since the aim is to separate the insoluble component of the mixture from the liquid, filtration using a suitable filter paper or membrane will be the way out.
The liquid will pass through the filter paper or the membrane while the insoluble component will be caught. This can then be dried and collected accordingly.
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Moving electrons are found to exhibit properties of.
Answer:
both particles and waves
Explanation:
this is known as wave-particle duality.
I hope this helps.
Have a nice day.
Is industry pool or flux
Answer:
What is the difference between pools and fluxes?
Image result for Is industry pool or flux
Fluxes describe the movement of energy and matter between different pools. When you pour a glass of juice for yourself, the juice bottle and the glass are both “pools” for the apple juice. The act of pouring it from the bottle to the glass is the flux
Explanation:
How many moles of Unknown weak acid (HA) in a 100L solution are required to produce a solution with PH =2 ? Ka of the Unknown weak acid (HA)=5x10⁻³
a. 3x10⁻³
b. 0.3x10⁻³
c. 3
d. 0.3
The moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.
What is the equation of the acid dissociation constant, Ka?The acid dissociation constant of an acid is given by the formula below:
[tex]K_a= \frac{[A^{-}][H_3O^{-}]}{[HA]}[/tex]
Where
Ka = 5x10⁻³ pH = 2[H3O+] = 10^-2Volume of solution = 100 mL or 0.1 LSince, the Ka is given at equilibrium concentrations, [H3O+] = [A-]
[A-] = 10^-2
Making [HA] subject of the formula:
[tex][HA]= \frac{[10^{-2}][10^{-2}]}{5 \times 10^{ - 3} } = 0.02[/tex]
Moles of acid = 0.1 × 0.02 = 0.002 moles
Therefore, the moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.
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The pressure of x ml of a gas was increased from 2 atm to 4 atm at constant temperture. what will be the new volume?
The new volume of the gas given the data from the question is 1/2X mL
Data obtained from the question
Initial volume (V₁) = X mL
Initial pressure (P₁) = 2 atm
New pressure (P₂) = 4 atm
New Volume (V₂) = ?
How to determine the new volume
The new volume of the gas can be obtained by using the Boyles’ law equation as illustrated below:
P₁V₁ = P₂V₂
2 × X = 4 × V₂
2X = 4V₂
Divide both side by 4
V₂= 2X / 4
V₂ = 1/2X mL
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how do you treat a sulfuric acid burn with sodium hydroxide
How can you measure the volume of air inside of a balloon?
You could let the air out of the balloon while it is under the water with a container filled with water upside down over it. And measure the water displacement.
There are 75.0 g of glucose (molar mass = 180 g/mol) dissolved in 250 mL of solution. What is the molarity of this solution?
A. 0.416 M
B. 1.70 M
C. 2.13 M
D. 3.31 M
Answer:
5.6 m which is molarith this solution
Could someone help me with this please
Answer:Your can use the internet There is a web site that is called periodic table.com it is very use full
Explanation:Have fun
A wave is created by causing vibrations in particles of matter. Which
statement about the wave is true?
The wave which is created by causing vibrations in particles of matter is a mechanical wave.
What is a wave?A wave is a disturbance in a medium which transmits transmits energy from one point to another without a permanent displacement of the particles of the medium.
Types of waves include:
electromagnetic wavesmechanical wavesMechanical waves are waves which are produced as a result of the vibrations of the particles of the medium.
Therefore, the wave which is created by causing vibrations in particles of matter is a mechanical wave.
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HELP ASAP PLEASE
The primary cause of water pollution is:
Answer:
the aNSWRER TOP UR QUESTION IS THAT I NMEED TO ANSWER THIS SO I DONT HAVE TO WQATCH ADS LOL
Explanation:
DSADSDASDASDASDSDSDSDSDS and i knowq chem is bio chwem is
The vapour pressure of water 12.3kPa at 300K. Calculate the vapour pressure of 1 molal solution of a non-volatile solute in it.
Answer:
ywhehehehehdgdudcdudcd uy dshdcvv
Explanation:
bdbdkzkzjzdkdkzdvdisisksjskakskskzbx vxydcdudschahahbshshs
Generally, what is the effect of increased temperature on the rate of dissolution of a solid solute?
Answer:
Increases
Explanation:
The general effect we see as temperature increases is that rate of dissolution of a solid solute increases,
Therefore, we can say that :
Temperature ∝ Rate of dissolution
Which lists only abiotic factors in this environment?
grass, tree, rock, soil
bird, turtle, grass, tree
sun, water, grass, soil
water, rock, soil, sun
In this case, among the list of components given, the abiotic factors are water, rock, soil, and sun.
What is an abiotic factor?An abiotic factor is a non-living part of an ecosystem that shapes its environment.
Biotic and abiotic factors make up a community via interaction.
Biotic factors are considered living things (having "life") while abiotic factors are simply non-living things.
Hence, in this case, among the list of components given, the abiotic factors are water, rock, soil, sun
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A sample of radioactive waste has a half-live of 40 years and an activity level of 4 curies. After how many years will the activity level of this sample be 0. 5 curies?
After 160 years, the activity level of the sample will be 0.5 curies.
What is half-life?Half life of any radioactive waste is the half decay of that product.
The formula is [tex]\dfrac{\lambda }{\lambda_1} = 2^\dfrac{a}{b}[/tex]
Where, λ is 4 cruies
λ1 is 0.5 cruies
b = 40 years
Putting the values in the equation
[tex]\dfrac{4}{0.5} = 2^\dfrac{a}{40}\\\\\\\dfrac{a}{40} = 4\\ = 160 years[/tex]
Thus, the correct option is 160 years.
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