Answer:
a substance that tends to bring about reduction by being oxidized and losing electrons.
Answer:
a substance that reduces a chemical compound usually by donating electrons.
How many grams of magnesium bromide (MgBry) are in 5.38 x 1024 formula units
of the substance?
Answer:
is 5509.12
Explanation:
creo que es eso no se lo siento
9. Select 2 that apply.
What statements do NOT apply to Hess's Law ? Select all that apply.
To find the enthalpy of formation of a compound, you can use the enthalpy changes of reactions that involve the elements that make up the
compound, even if those reactions are not necessarily intermediate steps in the production of that compound
Known enthalpy changes can be combined to calculate unknown enthalpies of reaction
If a reaction contains intermediate steps, the overall enthalpy change is equal to the last step where the enthalpy changed.
Thermochemical equations may be reversed, if necessary, to calculate unknown enthalpies, as long as the sign of the enthalpy value also changes.
No thermochemical equation can ever be reversed to calculate enthalpy, even if the value is changed.
If a reaction contains intermediate steps, the overall enthalpy change of the reaction is equal to the sum of the enthalpy changes of the intermediate
steps.
The statements that are applicable to Hess's Law include:
If a reaction contains intermediate steps, the overall enthalpy change is equal to the last step where the enthalpy changed.No thermochemical equation can ever be reversed to calculate enthalpy, even if the value is changed.What is Hess's Law?Hess's Law is also referred to as Hess's law of constant heat summation and it was named after a Swiss-born Russian chemist called Germain Hess.
Hess's Law states that the energy change experienced in an overall chemical reaction is equal to the sum of the energy changes in each chemical reactions that it contains.
In conclusion, the enthalpy change of a chemical reaction which is the heat of reaction at constant pressure is independent of the pathway between its initial and final states.
Read more on Hess's Law here: https://brainly.com/question/9328637
Please help I’m marking a branliest answer ☹️☹️☹️☹️☹️☹️
how many grams of k2co3 are needed to make 255 ml of a 88.5 m solution
Answer: You need approximately 70 g of potassium carbonate.
Explanation:
Hope this helps :) Good Luck!
vanadium hydroxide ionic or covalent?
Answer:
Vanadium in given compound is metal and oxygen is non-metal so, the given compound is a binary ionic compound.
I need help with this please????
[tex]\tt \rho=\dfrac{m}{v}=\dfrac{7\times 10^2~g}{1.3~g/L}=538~L[/tex]
please help only one question. will mark brainliest if solved
Which of the following is an example of an ionic compound?
A.) Carbon Dioxide
B.) Oxygen
C.) Sodium Chloride
D.) Water
Answer:
C.) Sodium Chloride
Explanation:
Table salt is an example of an ionic compound. Sodium and chlorine ions come together to form sodium chloride or NaCl.
How do you separate and collect salt and water after a neutralisation reaction?
Explanation:
water can be separated from salt solution by simple distillation. This method works because water has a much lower boiling point than salt. When the solution is heated, the water evaporates. It is then cooled and condensed into a separate container.
There are 31.1 grams (g) in 1 troy ounce (ozt). How many ozt of gold are extracted from 1 short ton of average Nevada ore
This problem is providing us with the mass equivalent to one troy ounce. Thus, the troy ounces of gold in one short ton of average Nevada ore is required and found to be the 0.103 otz according to the following dimensional analysis.
Dimensional analysisIn chemistry, a raft of problems do not always provide an equation in order to be solved yet dimensional analysis can be applied, so as to obtain the desired amount in the required units.
Thus, since this problem asks for try ounces in an average Nevada ore, which has 3.2 grams of gold per short ton of ore, one can solve the following setup in order to obtain the required answer in otz:
[tex]\frac{3.2gAu}{1short-ton}*1short-ton*\frac{1otz}{31.1g} \\[/tex]
Where the short tons are cancelled out as well as the grams, in order to obtain:
[tex]0.103 otz[/tex]
Learn more about dimensional analysis: brainly.com/question/10874167
Giving Braninliest!
Which of the following circuits is built correctly?
Answer:
number 2 becaus 1 and 3 look simler.
Explanation:
How can we explain the motion of objects?
Calculate the number of atoms/molecules present in
(a) 1 mole of sulphur.
(b) 2 moles of oxygen gas.
Answer:
1 mole contains 6.02 ×10^23 atoms
1 mole of Sulphur will contain 6.02 ×10^23 atoms
2moles of. Oxygen will contain 2 x 6.02×10^23 atoms. This gives 12.04 × 10^23 atoms
What is the empirical formula of C6H12O6?
C2H4O2
CH2O
CH2O2
C2H4O
Answer: The empirical formula for C6H12O6 is CH2O. Every carbohydrate, be it simple or complex, has an empirical formula CH2O
Explanation:
help! Homework due tomorrow
What is the amount in grams of EDTA needed to make 315.1 mL of a 0.05 M EDTA solution. The molar mass of EDTA is 374 g/mol
Answer:
58.92 g EDTA
Explanation:
315.1 mL = .3151 L
M = Moles / Liter
.3151 L x 0.5 mol EDTA x 374 g EDTA = 58.92 g EDTA
1 L EDTA 1 mol EDTA
The amount in grams of EDTA needed to make 315.1 mL of a 0.05 M is equal to 5.89 g.
Molar concentration
In a 0.05M solution, there are 0.05 moles of the substance per 1 liter, that is, in 315.1 ml we have:
[tex]\frac{0.05 mol}{xmol}= \frac{1000ml}{315.1ml}[/tex]
[tex]x = 0.016 mol[/tex]
Thus, 0.016 mol EDTA of is needed to prepare the solution.
Mass calculationTo calculate the mass in an amount of moles, we use the molar mass, so that:
[tex]m = MM \times mol[/tex]
[tex]m = 374 \times 0.016[/tex]
[tex]m = 5.89 g[/tex]
So, the amount in grams of EDTA needed to make 315.1 mL of a 0.05 M is equal to 5.89 g.
Learn more about mole calculation in: brainly.com/question/2845237
A car engine has a displacement of 536 cubic inches (in^3). What is the engines displacement in nm^3? Use dimensional analysis and show all work
The engine displacement in cubic nanometer (nm³) is 8.785×10²⁴ nm³
Data obtained from the question Displacement in in³ = 536 in³Displacement in nm³ =? Conversion scale1 in³ = 1.639×10²² nm³
With the above convesion scale we can obtain the displacement in nm³
How to determine the displacement in nm³1 in³ = 1.639×10²² nm³
Therefore,
536 in³ = 536 × 1.639×10²²
536 in³ = 8.785×10²⁴ nm³
Thus, the displacement in nm³ is 8.785×10²⁴ nm³
Learn more about conversion:
https://brainly.com/question/2139943
Need help with chemistry problem
Answer:
b option sir sidd dichhi good book goo
Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011 %Pb by mass. How much of the water (in mL) contains 160 mg of Pb? (Assume a density of 1.0 g/mL.)
In 145.45 grams of water there are 160mg of 0.0011% Pb.
Solution concentrationTo resolve this issue, it is necessary to use the concentration of solutions, which indicates the percentage amount of one solvent or solute in relation to the other.
In the case of the question, we have that Pb is at a concentration of 0.0011%, that is, for every 100 grams of water we have 0.0011 grams of Pb.
So, to calculate the amount of water that we have 160mg of Pb, we will make the following expression:
Pb H2O
[tex]\frac{0.0011g}{160\times 10^ {-3}g} =\frac{1g}{x}[/tex]
[tex]x = 145.45g[/tex]
So, in 145.45 grams of water there are 160mg of 0.0011% Pb.
Learn more about concentration in: brainly.com/question/7053858
state four temperature scales
Answer: Celsius, Fahrenheit, Kelvin, and Rankine.
Hope this helped you!
Which statement best defines visible light?(1 point)
A. a change in direction of light when it strikes an object
B. a type of atom found in energy
C. a distance between one part of a wave and another
D. a form of energy that allows people to see
what's up? i don't think D words it that well, but i would think it's D since none of the other answers make sense
Answer:
so you can give it
Explanation:
The difference between the amount of heat actually released upon the hydrogenation of benzene and that calculated for the hydrogenation of an imaginary cyclohexatriene is called the _________ of benzene.
From what we know, we can confirm that the difference measured by the experiment in the heat released when compared to the hydrogenation of an imaginary cyclohexatriene is called the stabilization energy of benzene.
What is stabilization energy?This is a term used to describe the difference in measured energy of a chemical structure compared to the theoretical energy amounts expected to be measured. In this experiment, the heat that was released did not match the calculated energy expected, which is a prime example of stabilization energy at work.
Therefore, we can confirm that the difference measured by the experiment is called the stabilization energy of benzene.
To learn more about energy visit:
https://brainly.com/question/1932868?referrer=searchResults
Compared to protons, electrons have:
a. much smaller mass and oppisite charge.
b. about the same mass and opposite charge.
c. much larger mass and the same charge.
d. much larger mass and oppisite charge.
Explanation:
a. much smaller mass and oppisite charge.
Pls help me before my mother takes away my phone
Answer:
sorry man i cant help you i tried my best im so so so sorry
Explanation:
Part B
The image models what happened after each cup was placed over an effervescent tablet. Note the changes in the water level and the air space in both glasses. The tablets are shown to help see how the experiment was setup, but the model represents the air bubbles after the tablets fully dissolved. Write down your observations in the space provided.
Answer:
The Changes I see is the Hot glass have less air bubbles than the Cold Glass. The Cold Glass has more air bubbles than the Hot Glass.
I hope this helps. I tried my best!! Good Luck!!
56.56
Two chemicals react in an endothermic reaction. What can be known about this reaction?
O The new substance will need more energy to form its chemical bonds than the old substance will release.
O More energy will be released from the old substance than the new substance will need to form its chemical bonds.
O A precipitate will form as a result of the reaction.
O A gas will form as a result of the reaction.
Answer:
it's a I took the test
Explanation
Answer:
A) The new substance will need more energy to form its chemical bonds than the old substance will release.
Explanation:
Write the pressure equilibrium constant expression for the reaction N2(g)+3H2(g)=2NH3(g)
Answer:
[tex]keq=\frac{[NH_{3} ]^2}{[N_{2} ][H_{2} ]^3}[/tex]
Explanation:
What is the difference between salinity and chlorinity?
Answer:
salinity is the concentrations of salts in water or soils, chlorinity is a measure of the concentration of halides in one kilogram of seawater. Explanation:
srry if its wrong ;-;
Answer:
Chlorinity and salinity are both measures of the saltiness of sea water. The relationship can be expressed mathematically, as salinity is equivalent to 1.80655 times the chlorinity.
Conclusion:
They both are the measures for the same thing, except salinity is equivalent to 1.80655 times the chlorinity.Learn more:
https://brainly.com/question/26555025
Social studies
https://brainly.com/question/26539371
Mathematics
https://brainly.com/question/26537282
Divisibility - Math
https://brainly.com/question/26525264
Mathematics
Thank You!
Answered by: ms115
A student ran the following reaction in the laboratory at 546 K:
COCl2 (g) CO (g) + Cl2 (g)
When she introduced 0.723 moles of COCl2 (g) into a 1.00 liter container, she found the equilibrium concentration of Cl2 (g) to be 3.38×10-2 M.
Calculate the equilibrium constant, Kc, she obtained for this reaction.
Kc =
Answer: For the reaction 2HCl(g) ==> H2(g) + Cl2(g), the Keq = [H2(g)][Cl2(g)]/[HCl(g)]^2
Explanation:
CO2(g)+CCl4(g)⇌2COCl2(g) .
Calculate ΔrG for this reaction at 125 ∘C under the following conditions.
PCO2= 0.100 bar
PCCl4= 0.160 bar
PCOCl2= 0.750 bar
The ΔG for the reaction shown is -11.76 kJ/mol.
What is equilibrium constant?The equilibrium constant is a value that shows the extent to which reactants are converted to products in a reaction. We have to first obtain the equilibrium constant as follows;
K = (0.750)^2/(0.160) (0.100) = 35
Now;
Using the formula;
ΔG = -RTlnK
ΔG = -(8.314 × 398 × ln 35)
ΔG = -11.76 kJ/mol
Learn more about equilibrium constant: https://brainly.com/question/17960050