Answer:
The oxidation state of carbon in CaC204 is 3
Which formula represents an isomer of this compound?
Answer:
Explanation:
I can’t explain but this is the answer LOL
~I will give the brainliest~
How does temperature affect the rate constant for a reaction?
A. increasing temperature exponentially increases the rate constant
B. increasing temperature linearly increases the rate constant
C. increasing temperature exponentially decreases the rate constant
D. increasing temperature linearly decreases the rate constant
E. temperature has no effect on the rate constant
(part 1 of 3) Copper reacts with silver nitrate through a single replacement. If 1.29 g of silver are produced from the reaction, how much copper(II) nitrate is also produced? Answer in units of mol. (part 2 of 3) How much Cu is required in this reaction? Answer in units of mol. (part 3 of 3) 1.0 points How much AgNO3 is required in this reaction? Answer in units of mol.
Answer:
See explanation.
Explanation:
Hello there!
In this case, according to the described chemical reaction, we first write the corresponding equation to obtain:
[tex]Cu+2AgNO_3\rightarrow 2Ag+Cu(NO_3)_2[/tex]
Thus, we proceed as follows:
Part 1 of 3: here, since the molar mass of silver and copper (II) nitrate are 107.87 and 187.55 g/mol respectively, and the mole ratio of the former to the latter is 2:1, we can set up the following stoichiometric expression:
[tex]m_{Cu(NO_3)_2}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{1molCu(NO_3)_2}{2molAg}*\frac{187.55gCu(NO_3)_2}{1molCu(NO_3)_2} \\\\m_{Cu(NO_3)_2}=1.12gCu(NO_3)_2[/tex]
Part 2 of 3: here, the molar mass of copper is 63.55 g/mol and the mole ratio of silver to copper is 2:1, the mass of the former that was used to start the reaction was:
[tex]m_{Cu}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{1molCu}{2molAg}*\frac{63.55gCu)_2}{1molCu} \\\\m_{Cu}=0.380gCu[/tex]
Part 3 of 3: here, the molar mass of silver nitrate is 169.87 g/mol and their mole ratio 2:2, thus, the mass of initial silver nitrate is:
[tex]m_{AgNO_3}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{2molAgNO_3}{2molAg}*\frac{169.87gAgNO_3}{1molAgNO_3} \\\\m_{AgNO_3}=2.03gAgNO_3[/tex]
Best regards!
Which two planets are the largest? Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
Answer:
Jupiter and Saturn are the two biggest planets
2). A student collects 425 L of oxygen at a temperature of 24.0°C and a pressure
of 0.899 atm. How many moles of oxygen did the student collect?
Answer:
15.5 moles
Explanation:
Applying,
PV = nRT.................. Equation 1
Where P = pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.
Make n the subject of the equation
n = PV/RT............... Equation 2
From the question,
Given: P = 0.899 atm, V = 425 L, T = 24 °C = (273+24) K = 297 K.
Constant: R = 0.083 L.atm/K.mol
Substitute these values into equation 2
n = (0.899×425)/(297×0.083)
n = 15.5 moles
What does temperature surround when the kinetic energy is moving fast ?
When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.
In chemistry, we define the temperature of a substance as the average kinetic energy of all the atoms or molecules of that substance. Not all of the particles of a substance have the same kinetic energy. At any given time, the kinetic energy of the particles can be represented by a distribution.
In physics, temperature is defined as the average kinetic energy of the particles in an object. ... When particles move more quickly, temperature is higher and an object feels warmer. When particles move more slowly, temperature is lower and an object feels cooler.
乁(ᵔヮᵔ)ㄏ
DIRECTIONS: Classify the following unbalanced chemical equations according to the six types
of chemical reactions. Write your answer on the space provided for each number.
1. NaOH + KNO3 NaNO3 + KOH
2. CH4 + O2 CO2 + 2H2O
3. Fe + NaBr FeBr3 + Na
4. CaSO4 + Mg(OH)2 Ca(OH)2 + MgSO4
5. NH4OH + HBr H2O + NH4Br
6. P4 + O2 P2O4
7. NaNO3 NaNO2 + O2
8. C18H18 + O2 CO2 + H2O
9. H2SO4 + NaOH NaSO4 +H2O
10.NiSO4 + Li3PO4 Ni3(PO4)2 + Li2SO4
2. Identify the limiting reactant when 4.68 g of iron reacts with 2.88 g of sulfur to produce Fes.
Fe +
_Sg → FeS
B
C с
A
+
Help please I’ll mark brainliest
Answer:
Iron is limiting reactant
Explanation:
Based on the reaction:
Fe + S → FeS
1 mole of iron reacts per mole of Sulfur
To solve this question we must convert the mass of each reactant to moles using molar masses of each reactant. As the reaction is 1:1, the reactant with the lower amount of moles is limiting reactant.
Moles Fe -Molar mass: 55.845g/mol-
4.68g * (1mol / 55.845g) = 0.0838 moles
Moles S -Molar mass: 32.065g/mol-
2.88g * (1mol / 32.065g) = 0.0898 moles
As the amount of moles of Fe < Moles S,
Iron is limiting reactant
When 4.68 g of iron reacts with 2.88 g of sulfur to produce FeS, iron is the limiting reagent.
What is limiting reagent?
If in a chemical reaction two reactants are present and one of them is present in less quantity as compared to other, is known as limiting reagent.
Given chemical reaction is:
Fe + S → FeS
From the stoichiometry of the reaction it is clear that equal moles of both reactant is required for the formation of product, so their mole ratio is 1:1.
Now we calculate the moles by using the formula:
n = W/M, where
W = given mass
M = molar mass
Moles of 4.68g of iron = 4.68g / 55.845g/mole = 0.0838 moles
Moles of 2.88 of sulfur = 2.88g / 32.065g/mole = 0.0898 moles
Moles of iron is less as compare to the sulfur, so it is the limiting reagent.
Hence, iron is the limiting reagent.
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how many grams is needed to make the following solution?
Answer:
c
Explanation:
yxyyyxyxxyxxy yy y gg ff ff d d f t r rr rr rr rr r r t tt t
Please help me with this homework
Answer:
The answer is C density.
Past due! Help please I choose the middle picture for my hypothesis being inclusive can you help explain why and how it shows it’s being inclusive?
Answer:
Explanation:
its supposed to be not supported not inclusive because you said mix
Which is NOT part of the male reproduction system of a flower? stamen pollen anther pistil
Answer:
Pistil
Explanation:
I believe it is the pistil, because the pistil is part of the female reproductive system of a flower. A stamen is for the male reproductive system.
PLEASE HELP!
an element with 8 protons and 10 neutrons
Answer:
oxygen ion O2-
Explanation:
because it has 8 protons and gave gained 2 electron so O2-.
How many moles of acetylene are needed to completely react with 16.5g of CO2
Answer:
0.375 mols
Explanation:
Relative atomic mass Ar of C=12×1=12Relative atomic mass Ar of O=16×2=32Realitive formula mass Mr is 12+32=44mol:mass
1 : 44
x :16.5
cross multiply and get the answer
If 1.5 moles of NaC₂H₃O₂ are dissolved in 750g of water, what is the molality of this solution?
2.0m
1.5m
2.6m
0.9m
Answer:
2m.
Explanation:
molality = no.of moles of solute ÷ mass of solvent in kg
molalty = 1.5 moles ÷ 0.75 g
= 2m
If 1.25 g of water is heated from 20.0 degrees Celsius to 45.0 degrees Celsius and has a specific
heat of 4.18 J/gC, how much heat energy does it contain?
Answer: Heat energy contained by water is 130.625 J.
Explanation:
Given: Mass = 1.25 g
Specific heat = [tex]4.18 J/g^{o}C[/tex]
Initial temperature = [tex]20.0^{o}C[/tex]
Final temperature = [tex]45.0^{o}C[/tex]
Formula used to calculate heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 1.25 g \times 4.18 J/g^{o}C \times (45.0 - 20.0)^{o}C\\= 130.625 J[/tex]
Thus, we can conclude that heat energy contained by water is 130.625 J.
If you say an object is hot, you are feeling the transfer of
a. chemical energy
b. thermal energy
c. potential energy
d. kinetic energy
Answer:
The answer to your question is B
How does velocity affect the movement of an object?
Answer:
when the velocity is at a higher *rate of speed*, the faster the object will move!
Explanation:
Should couples wanting to start a family undergo genetic testing to minimize risk to their offspring
Answer:
Yes
Explanation:
The genetic testing is also called as the DNA testing. It is mainly used for identifying the changes in the DNA sequence or the chromosomes structure. It can also measure the results in the genetic changes.
Couples those who are planning to start a family should go for a genetic testing so as to minimize a risk in the upbringing or growth of their offspring. By doing a genetic testing a couple can well know the conditions of the baby that could affect them. The result from a genetic testing can help to plan better before starting a family. Therefore, it is advisable for couples to go for a genetic testing so that they plan better by knowing the conditions.
pls help me ASAP
its very urgent
Answer:
C Region
Explanation:
C Region contains all the liquids as 0 °C is the freezing point of water (Crystals of water are formed leaving it no more in the liquid state) and 100 °C is the boiling point (The water boils leaving it no more in the liquid state).
Hence, All liquids are contained in the C region.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Perform an on-line search to find real-world uses for the titration process. State what you find below.
Answer:
The titration process has quite a few real-world uses, including key roles in the food industry and medical community. The titration process is essentially an analytical technique, as it is used to determine a chemical or physical property of a chemical substance, element, or mixture (such as food). Specifically in the food industry, it is used to allow food manufactuers to determine the quantity of a reactant in a sample. To provide an example, it can be used to find the specific amount of stuff that is usually labeled on the nutrition label, such as sugar, salt, protein, calcium, vitamin C, etc. As for the medical world, pharamcists typically use this process to get the proper mix when compounding medicines. It is used to get the necessary proportions in intravenous drips.
When writing the formulas for a compound that contains a polyatomic ion, ... ?
Answer:
The cation is written first in the name; the anion is written second in the name. Rule 2. When the formula unit contains two or more of the same polyatomic ion, that ion is written in parentheses with the subscript written outside the parentheses.
When writing the formula of a compound that contains polyatomic ion, the metal is written first followed by the central atom in the ion and then other atoms that surround the central atom.
A poly atomic ion refers to an ion that comprises of more than one atom. Such ions are common in chemistry. Examples of polyatomic ions include; PO4^3-, BH4^- etc.
When writing the formula of a compound that contains a polyatomic ion, the metal is written first then the central atom in the ion follows before other atoms that surround the central atom in the ion.
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I NEED HELP FAST
Identify the charges that are negative
А
B
Select the correct answer. Two charged objects, A and B, exert an electric force on each other. What happens if the distance between them is increased? A. The charge on B decreases. B. The charge on B increases. C. The electric force between them decreases. D. The electric force between them increases.
Answer:
The electric force between them decreases
Explanation:
The force between two charged particle is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Where
r is the distance between charges
If the distance between the charges is increased, the electric force gets decreased as there is an inverse relation between force and distance.
Hence, the correct option is (c) "The electric force between them decreases"
answer number 12 for me
Answer:
I believe its F: 2.55
Explanation:
I know I'm very late, positive you're past this question, I'd hope at least.
A chemist observed bubbling and fizzing after adding an acid solution to a
white powdery substance in a beaker. Which of the following can be
inferred?
Answer:
a chemical reaction occured
Explanation:
bubbling and fizzing after adding a substance, most offten means a chemical reaction is happening
2) What is an atom? Name and give the charges of the three particles inside the atom.
Please help!!
All fake answers get reported immediately. Yes, I am a girl -_-
Answer:
1.)C₃H₈O
2)OH
3.)1-propanol
1.) C4H8O
2.) C2H6O or CH3CH2OH
3.)Ethanol
Explanation:
Hope this help
A decrease in the height of the mercury column usually means the coming of a.
Answer:
Low-pressure system and clear weather.
Explanation:
Find the w/w% of a solution that contains 10 grams of solute and 100 grams of solvent
Answer:
I think the w/w% of this question is 10.
The w/w% of a solution that contains 10 grams of solute and 100 grams of solvent is 9.09%
What is mass percentage % ?Mass percentage is another name of w/w % or weight /weight % .
To determine the weight/weight % of a solution :
we divide the mass of solute by mass of the solution (solute and solvent together) and multiply by 100 to obtain per cent.
[tex]\dfrac{w}{w} \; \%\; =\;\rm\dfrac{mass \;of\; solute}{mass\; of \; solute\;+\;mass\;of\;solvent} \times 100[/tex]
It is given that , mass of solute = 10 grams and mass of solvent = 100 grams
So,
[tex]\dfrac{w}{w} \; \%\; =\;\rm\dfrac{10}{10+100} \times 100[/tex]
[tex]\dfrac{w}{w} \; \%\; =\;\rm\dfrac{10}{110} \times 100\\\\\dfrac{w}{w} \; \%\; =\;\rm\dfrac{100}{11}\\\\\dfrac{w}{w} \; \%\; =\; 9.09 \;\%[/tex]
The w/w% of a solution that contains 10 grams of solute and 100 grams of solvent is 9.09% .
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