Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Answer: Enzymes are catalysts which will lower the activation energy of a chemical reaction. Activation energy is the energy needed to get a reaction going. By lowering the amount of energy needed to start a reaction, the reaction can go more quickly.
1- What is temperature?
2- If you could see individual atoms, what happens to them when temperature increases?
In your own please :(
Answer:
the sum of average kinetic molecules of the body is called temperature..
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
NaCl + AgNO, = AgCl + NONO,
If you have 98 grams of sodium chloride, 47 grams of silver nitrate, and 59 grams of silver
chloride, then how many grams of sodium nitrate will you have?
145 grams
86 grams
18 grams
101 grams
Based on the mass ratio of reactants, 23.5 g of sodium nitrate is produced from the reactants.
What is mass ratio of a chemical reaction?The mass ratio of a reaction is the ratio of the masses of reactants wilhich combine to form products.
The mass of sodium nitrate is determined from the mass ratio.
The equation of the reaction gives the mass ratio as follows:
NaCl + AgNO3 ----> AgCl + NaNO3
Molar mass of NaCl = 58.5 g
Molar mass of AgNO3 = 170 g
Molar mass of AgCl = 143.5
Molar mass of NaNO3 = 85 g
There are 98 grams of sodium chloride, 47 grams of silver nitrate, therefore silver nitrate is the limiting reactant.
47 grams of silver nitrate will produce 85/170 × 47 = 23.5 g of sodium nitrate.
Therefore, 23.5 g of sodium nitrate is produced from the reactants.
Learn more about mass ratio at: https://brainly.com/question/24473649
What is the mass of 750 atoms of Nitrogen?
750 x 14,0067 u = 10,505.025 g
please help only one question. will mark brainliest if solved
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 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:
How much energy is needed for the reaction of 1.22 miles of H3BO3 with 5.67 moles of hydrogen?
_H2BO3 + _H2 _B2H6+_H2O
The heat of reaction is the quantity of heat absorbed or emitted in a reaction.
What is heat of reaction?The heat of reaction is the quantity of heat absorbed or emitted in a reaction. This question is incomplete hence the numerical value of the heat of reaction can not be determined.
However, the heat of reaction is determined from the mass of the reactants, the temperature change in the calorimeter and the number of moles of the limiting reactant.
Learn more about heat of reaction: https://brainly.com/question/2192784
What is the height on human
Answer:
5 feet 6 inches is the optimal height for a human
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
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
0-2
How many electrons moved to make the above
oxygen ion?
received 1 electron
gave 2 electrons away
gave 1 electron away
received 2 electrons
Answer:
received 2 electrons
Explanation:
Since a neutrally charged oxygen has 8 electrons (-) and 8 protons (+), an oxygen ion with a charge of -2 and would have 10 electrons.
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:
On a hot day, you might cool off by sitting in the shade of a big tree, eating a cold popsicle, going into an air-conditioned building, or jumping into a cold lake. Which of these are examples of using technology?
Answer:
Air conditionded building
Explanation: Ice cream is processed food so techniacally it could be using technology but Air conditioning is a unit of metal and is built. Hope this is right!
10. What do you have to do to the coefficients of equation I below to get to equation II?
i. 2 SnO2 + 4 H2 2 Sn + 4 H2O
ii. SnO2 + 2 H2 Sn + 2 H2O
please help me with this
calculate Kf for t butyl alcohol and use the results to find the mean value of the Kf for t-butyl alcohol
It should be noted that to calculate Kf for t butyl alcohol, we need to calculate molality.
How to calculate KfYour information is incomplete as the figures are not given. Therefore, an overview will be given. To calculate Kf for t butyl alcohol, we need to calculate molality.
Molality will be calculated as:
= mass of solute / (molar mass of solute × mass of solvent)
For example, if the solution has a molality of 0.455 that freezes at 3.17 degrees Celsius, then Kf would be equal to 3.17 divided by 0.455 which is 6.96 degrees Celsius.
Learn more about molality on:
https://brainly.com/question/9149034
Which of the following organisms do not produce uric acid as the excretory product?
Answer:
where are the following organisms
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:
Balance the following equation and express the rate in terms of the change in concentration with time for each substance: NO(g) O2(g) LaTeX: \longrightarrow N2O3 (g) When N2O3 is forming at 0.221 M/s, at what rate is NO decreasing
The balanced equation is:
4 NO(g) + O₂(g) ⇒ 2 N₂O₃(g)
The expression of the rate in terms of change in concentrations are:
[tex]v = \frac{-\Delta [NO]}{4\Delta t } = \frac{-\Delta [O_2]}{1\Delta t } = \frac{\Delta [N_2O_3]}{2\Delta t }[/tex]
When N₂O₃ is forming at 0.221 M/s, NO is disappearing at 0.442 M/s.
What is the reaction rate?The reaction rate is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time.
Step 1: Write the balanced equation.4 NO(g) + O₂(g) ⇒ 2 N₂O₃(g)
Step 2: Express the rate in terms of the change in concentration with time for each substance.We will need to consider the stoichiometric coefficient of each species.
[tex]v = \frac{-\Delta [NO]}{4\Delta t } = \frac{-\Delta [O_2]}{1\Delta t } = \frac{\Delta [N_2O_3]}{2\Delta t }[/tex]
Step 3: Given the rate of formation of N₂O₃ is 0.221 M/s, calculate the rate of disappearance of NO.The molar ratio of NO to N₂O₃ is 4:2.
[tex]\frac{0.221molN_2O3}{L.s} \times \frac{4molNO}{2molN_2O_3} = \frac{0.442 molNO}{L.s}[/tex]
The balanced equation is:
4 NO(g) + O₂(g) ⇒ 2 N₂O₃(g)
The expression of the rate in terms of change in concentrations are:
[tex]v = \frac{-\Delta [NO]}{4\Delta t } = \frac{-\Delta [O_2]}{1\Delta t } = \frac{\Delta [N_2O_3]}{2\Delta t }[/tex]
When N₂O₃ is forming at 0.221 M/s, NO is disappearing at 0.442 M/s.
Learn more about reaction rate here: https://brainly.com/question/1898560
Round the following number to two signifacant figures.
275
Answer:
3 significant figures
Explanation:
Thus 2° C, converts to 275 K, which has 3 significant figures. Rounding Error When you do a long series of calculations, try to do them all in one set of operations.
state four temperature scales
Answer: Celsius, Fahrenheit, Kelvin, and Rankine.
Hope this helped you!
help! Homework due tomorrow
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
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
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
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
Please help I’m marking a branliest answer ☹️☹️☹️☹️☹️☹️
Need help with chemistry problem
Answer:
b option sir sidd dichhi good book goo
A sample of ammonia has a mass of 18.2g. How many molecules are in this sample?
Answer:
1.8x10_24 moleclues
Explanation:
because you have to divide the numbers and then times them together