Answer:
See note under explanation
Explanation:
That the particles have mostly non-polar structures or, have a very low degree of electronegativity (i.e. very low or no attractive interactions) so that particle - particle interaction favors the gas phase when not in an equilibrium based environment. That is, a closed container of liquid were liquid phase is in equilibrium with gas phase. However, when not in a closed container; i.e., spilled, particles evaporate rapidly moving into the gas phase from liquid phase.
Hope this helps. :-)
The molecule of the liquid which quickly evaporates means that it has a non
polar structure.
Polar substances have the presence of regions of positive and negative
charges in them which makes them more stable. Non polar compounds on
other hand have charges distributed in a spherically symmetric manner.
Non polar substances are less stable and have very low boiling points and
is the reason the liquid quickly evaporated when it was spilled.
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1. Determine los gramos obtenidos de hidróxido de calcio [Ca(OH)2], al reaccionar 12 g de óxido de calcio (CaO) con agua.
Answer:
15,86 g Ca(OH)₂ ≅ 16 g
Explanation:
La ecuación química balanceada para la reacción entre el óxido de calcio (CaO) y el agua (H₂O) para formar hidróxido de calcio (Ca(OH)₂) es la siguiente:
CaO(s) + H₂O(l) → Ca(OH)₂(ac)
De acuerdo a esta ecuación, 1 mol de Ca(OH)₂ es producida a partir de 1 mol de CaO. Convertimos las moles a gramos utilizando la masa molecular (MM) de cada compuesto:
MM(CaO)= 40 g/mol Ca + 16 g/mol O = 56 g/mol
⇒ 1 mol CaO x 56 g/mol CaO = 56 g CaO
MM(Ca(OH)₂) = 40 g/mol Ca + (2 x 16 g/mol O) + (2 x 1 g/mol H) = 74 g/mol
⇒ 1 mol Ca(OH)₂ x 74 g/mol Ca(OH)₂ = 74 g Ca(OH)₂
Por lo tanto, la relación estequiometrica es:
1 mol Ca(OH)₂/1 mol CaO = 74 g Ca(OH)₂/56 g CaO
Multiplicando la relación estequiométrica por la masa real de CaO (12 g), obtenemos los gramos obtenidos de Ca(OH)₂:
12 g CaO x 74 g Ca(OH)₂/56 g CaO = 15,86 g Ca(OH)₂
In the reaction 4 Sb + 3 O2 --> Sb406, how many moles of antimony are
required to fully react with 8.00 moles of oxygen?
O 5.34 moles
O 10.7 moles
O 6.00 moles
O 12.0 moles
PLEASE HELP!!
Answer:
1.667 moles of antimony will be produced
2) A bicycle rider is traveling up a hill. When the rider reaches the top of
the hill, she stops to rest. Then she travels down the hill. The diagram
shows the rider in the three different positions. Which of these correctly
describes the potential energy and kinetic energy of the bicycle rider?
Answer: A: When the rider is at the top of the hill, her potential energy is greatest, and her kinetic energy is the least.
Explanation:
which element's properties are similar to potassium
Are mossed and ferns climax community or pioneer species
Answer:
Pioneer species I believe.
Explanation:
a student was investigating the reaction between marble chips and dilute hydrochloric acid
Answer:
Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. The rate of this reaction can be changed by changing the size of the marble chips.
Explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
In the reaction below, 22 g of H2S with excess
O2 produced 5 g of sulfur.
? H2S + ? O2 → ? S + ? H2O .
What is the percent yield of sulfur?
Answer in units of %.
Answer:
24%
Explanation:
From the question, the limiting reactant is H2S.
The reaction equation is;
2H2S + O2 → 2S + 2H2O
Number of moles of H2S reacted = 22g/34 g/mol = 0.647 moles
According to the reaction equation;
2 moles of H2S yields 2 moles of sulphur
0.647 moles of H2S yields 0.647 moles of sulphur
So;
Theoretical yield of sulphur = 0.647 moles * 32 g/mol = 20.7 g
Actual yield = 5 g
% yield = actual yield/theoretical yield * 100
% yield =5 g/20.7 g * 100
% yield = 24%
PLEASE HELP ASAP
which is a primary consumer?
Picture shown above
zooplankton cod and krill
What element is 1s^2 2s^2 2p^6 3s2 3p^3
Answer:
Phosphorus
Explanation:
If you add up all the electrons (the exponents) it equals 15 which is the atomic number of phosphorus. And since stable atoms have the same number of protons and electrons it'll be phosphorus
some students were investigating the speed of a toy car. they perform two trials and recorded their data in the table below
what was the average speed of the toy car during the two trials to the nearest tenth of a m/s? be sure to use correct place values.
25.4
1.6
3.0
6.4
Answer:
It's 3.0
Hope this helps :)
A gas at 55.0°C occupies a volume of 3.60L. What volume will it occupy at 30.0° C?
Pressure is constant
Answer:
3.33L
Explanation:
18 ) The efficiency of the machine with output is=30 N and input of 10 N=
O 3
O 3%
30 %
O 0.33%
Answer:
=work output /work input ×100%
Explanation:
(30/10 )×100%
=300
In a garage there are two freezers. One freezer is kept at -30 degrees Celsius. The other
freezer is kept at 0 degrees Celsius. Water is put into both of the freezers. After several
days have passed,
which of the following statements is true?
O The ice at 0 degrees is warmer than the ice at -30 degrees.
O The water has turned to ice in both freezers and the ice is the same temperature
All the water has turned to ice in the one freezer but is still all water in the other freezer
Neither freezer has turned the water into ice
Answer:
Number 1
Explanation:
O The ice at 0 degrees is warmer than the ice at -30 degrees.
1
Select the correct answer.
When melted Iron solidifles without any change in temperature, what is happening on the atomic level?
ОА.
The iron atoms are gaining kinetic energy.
ОВ.
The iron atoms are losing kinetic energy.
Ос.
The iron atoms are gaining potential energy.
OD
The iron atoms are losing potential energy.
Reset
Next
Answer:
A. the iron atoms are gaining kinetic energy
Explanation:
when the iron melted and solidifies it loses potential energy and changes to kinetic energy
Compounds with a ring of resonance bonds are called
Answer:
they are aromatic compounds
Explanation:
all gotten from benzene
Humans have altered the composition
of Earth's atmosphere by
A. Making the air pressure drop
B. Making the air temperature drop
C. Polluting it with excess ozone
D. Polluting it with carbon dioxide gas
The answer is most likely D
A student prepares two solutions as shown. The dots represent solute particles. The student wants to test the conductivity of each solution. Prior to carrying out the investigation, the student needs to identify the variables being controlled and the variables being changed between the two solutions.
A.
The volume of the solution and the number of solute particles are being changed between the two solutions, but the concentration of the solution is being held constant.
B.
The number of solute particles and the concentration of the solution are being changed between the two solutions, but the volume is being held constant.
C.
The number of solute particles is being changed between the two solutions, but the volume and concentration of the solution is being held constant.
D.
The volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
Answer:
I think its D
Explanation:
It cant be B or C bc the solute particles arent changing. And its not A because the concentration isnt constant
The volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
What is conductivity?The term conductivity refers to the movement of electric current through a solution and it depends on the avilability of ions in the solution.
When measuring the conductivity of solutions, the volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
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Why group the microscopic molecules known to form substances
that we find in the world, such as water and salt?
Answer:
Explanation:
he gave you a virus, dont click it
Please help answer this. And please no links!
Answer:
i am not sure but its 2 ican"t qry
Explanation:
Why is the solvation energy negative?
a) bonds are being created
b) bonds are breaking
Answer:
your answer will be b) bonds are breaking
the manager of a bookstore uses the equation s = p - 3.5 to find the price a student pays for books
ill mark brainliest
Answer:
Third one
Explanation:
4 Catalytic converters can remove carbon monoxide.
a Give a word equation for the reaction that takes place.
b What is the purpose of the transition elements?
Answer:
a) CO+O2→CO2.
b) Copper is an ideal example of a transition metal with its variable oxidation states Cu2+ and Cu3+. The incomplete d-orbital allows the metal to facilitate exchange of electrons. Transition metals can both give and accept electrons easily, thereby making them favourable as catalysts.
Explanation:
Calculate the concentration of the solution produced when 5.2g of potassium chloride is
dissolved in 200cm of water.
Answer: The concentration of solution is 0.35 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml = 200
moles of [tex]KCl[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{5.2g}{74.5g/mol}=0.070mol[/tex]
Now put all the given values in the formula of molality, we get
[tex]Molarity=\frac{0.070\times 1000}{200}[/tex]
[tex]Molarity=0.35M[/tex]
Therefore, the concentration of solution is 0.35 M
Carbon dioxide reacts with lithium hydroxide to produce lithium carbonate and water.
What mass of lithium hydroxide would be required to react with 1.00 x 103 grams of carbon dioxide?
Answer:
1.08827 x 10^3 g.
Explanation:
The equation for the reaction is:
2LiOH + CO2 ----> Li2CO3 + H2O
Using the molar masses:
CO2 = 12.011 + 2* 16 = 44.011.
LiOH = 6.94 + 1.008 + 16 = 23.948
S0 44.011 of CO2 reacts with 2*23.948 g of LiOH
1.00 *10^3 g CO2 reacts with 2*23.948 * 1.00 *10^3 / 44.011
= 1088.27 g LiOH.
Consider the reaction 2CO * O2 —> 2 CO2 what is the percent yield of carbon dioxide (MW= 44g/mol) of the reaction of 10g of carbon monoxide (MW=28g/mol) with the excess O2 produces 10g of carbon dioxide? Answer in units of %
Answer:
Y = 62.5%
Explanation:
Hello there!
In this case, for the given chemical reaction whereby carbon dioxide is produced in excess oxygen, it is firstly necessary to calculate the theoretical yield of the former throughout the reacted 10 grams of carbon monoxide:
[tex]m_{CO_2}^{theoretical}=10gCO*\frac{1molCO}{28gCO}*\frac{2molCO_2}{2molCO} *\frac{44gCO_2}{1molCO_2}\\\\ m_{CO_2}^{theoretical}=16gCO_2[/tex]
Finally, given the actual yield of the CO2-product, we can calculate the percent yield as shown below:
[tex]Y=\frac{10g}{16g} *100\%\\\\Y=62.5\%[/tex]
Best regards!
Can someone finish this Punnett square please
What volume of H2S is needed to produce 14.2 L of SO2 gas? The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O.
Answer:
14.2 L H2S
Explanation:
Mole ratio
2 mol H2S:2 mol SO2
We are just looking for volume, so the required amount is the same as the produced amount as long as the mole ratio is balanced.
The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
What is Mole ratio?Two factors can be used to identify stoichiometry problems: the information provided in the problem and he information that needs to be solved for, also known as the unknown.
The given and the unknown might both be reactants, could both be products, or could both be products with one of them acting as a reactant. Mole amounts can be used to express the substance quantities.
However, it is typical in a laboratory setting to calculate a substance's mass in grams to determine how much of it is present. A gaseous substance's volume can be used to express its quantity.
Therefore, The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
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Which one of the samples contains the most molecules?
o
A. 1 mol of CO2(g)
B. 1 mol of UF6(g)
O C. 1 mol CH3COOH()
D. They all have the same number of molecules
Answer: D is right
Explanation: One mole contains 6.0225 ·10^23 molecules
Despite of the substance
.In a _____ relationship one variable increases and a second variable increases proportionally,
A. inverse relationship/inversely proportional
B. direct relationship/directly proportional
C. converse relationship/conversely proportional
Answer:
Explanation: b
Identify each of the following as a single bond, double bond, or triple bond.