2) A student was working on an investigation to measure the relative activity
of an enzyme at various pH values. He collected the following data:
pH 2, enzyme activity 10; pH 8, enzyme activity 50;
pH 12, enzyme activity 10; pH 4, enzyme activity 20;
pH 6, enzyme activity 40; pH 10, enzyme activity 40

Answers

Answer 1

Answer:

THE LAST ONE

Explanation:


Related Questions

1 mole of a gas occupies 22.4 L at ________

Answers

Answer: At STP, one mole (6.02 × 1023 representative particles) of any gas occupies a volume of 22.4 L (Figure below). A mole of any gas occupies 22.4 L at standard temperature and pressure (0°C and 1 atm).

Explanation:

That the answer

1 mole of a gas occupies 22.4 L at (0°C and 1 atm). It is the standard temperature and pressure.

What is Avogadro's hypothesis?

Avogadro's hypothesis says that all gases have an equal number of particles at the same temperature and pressure.

The empty space between the particles makes up the majority of a gas's overall volume.

Due to this, the size of the particles themselves is nearly insignificant.

The volume of one mole of a gas at standard temperature and pressure is known as the molar volume.

Thus, the correct option is 0°C and 1 atm.

Learn more about Avogadro's hypothesis

https://brainly.com/question/12779877

Help meh, please !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

volume of 200mL, density shows it weighs .789 grams for every mL.  .789*200= 157.8 grams

Explanation:

See the reference image for the chemical equation for the reaction you just observed. What do you think each side of the equation represents? What do the symbols in the equation represent? Be prepared to share your thoughts with a partner.


HELP QUICK

Answers

Answer:

Detail is given below.

Explanation:

Chemical equation:

4NH₃ + 3O₂      →     2N₂ + 6H₂O

This reaction shows that when ammonia react with oxygen it form water and nitrogen gas.

There are two reactants on left hand side oxygen and ammonia. Ammonia is formed when nitrogen and hydrogen react. While on right hand side there are two products nitrogen and water. Water is formed by the reaction of hydrogen and oxygen.

The given reaction also shows that it follow the law of conservation of mass.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.  

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

Which of the following models best demonstrates the law of conservation of mass??
(LOOK AT THE PICTURES)!!

Answers

Answer:

i think its D

Explanation:

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Taking into account the law of conservation of mass,

The Law of Conservation of Matter is also called the law of conservation of mass or the Law of Lomonósov-Lavoisier. This law postulates that "The mass is not created or destroyed, only transformed."

This means that the reagents interact with each other and form new products with different physical and chemical properties than those of the reagents. And this is because the atoms of the substances are ordered differently.

But the quantities of the masses involved in a given reaction must be constant throughout it, that is, they will not have changed in their proportions when the reaction ends. Then the mass before the chemical reaction is equal to the mass after the reaction.

The exception to the rule is nuclear reactions, in which it is possible to convert mass into energy and vice versa.

Finally, the correct answer is option A. because the atoms of the substances are ordered differently, this is the reagents interact with each other and form new products.

Learn more about law of conservation of mass:

https://brainly.com/question/20081187?referrer=searchResultshttps://brainly.com/question/23986198https://brainly.com/question/13410855

EXPLANATION OF THE MESOSPHERE ASAP PLSSS

Answers

The mesosphere is a layer of Earth's atmosphere. The mesosphere is directly above the stratosphere and below the thermosphere. It extends from about 50 to 85 km (31 to 53 miles) above our planet. Temperature decreases with height throughout the mesosphere. ... Most meteors vaporize in the mesosphere.

Dashawn has to find the volume of his phone for science
class. He uses a ruler to measure its length, width, and
height and finds the following:
| = 17 cm
w = 7.5 cm
h = 0.8 cm
What is the volume of Dashawn's phone?

Answers

Answer: Volume of rectangle = L * W * H

Explanation: Multiply the 3 numbers together

Answer:

volume = L x W x H

V= 17 x 7.5 x 0.8

V = 102 cm^3

Explanation: Multiply the three number.

To find the volume, you multiply length times width times heigh

Which statement best describe what happens during a chemical change

Answers

Answer:

both the identity and the properties of a substance change.

Answer:

its A both the identity and the properties of a substance change

Explanation:

got it right on edge

If a 20-N net force makes an object accelerate at 10 m/s^2, what is the mass of the object?

Answers

Answer:

The answer is 2 kg

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

where

a is the acceleration

f is the force

From the question we have

[tex]m = \frac{20}{10} \\ [/tex]

We have the final answer as

2 kg

Hope this helps you

Electron configuration always starts with the lowest energy electrons.
true or false

Answers

Answer:

True I think..-

Explanation:

Sorry if it's wrong.-

CaCO3
How many atoms of oxygen are in one
molecule of calcium carbonate?
A 1
B3
C5
D6

Answers

Answer:

B. three atoms of oxygen

How can you tell if an element is a metal or a nonmetal??

Answers

Answer:

Elements to the left of the line are considered metals. Elements just to the right of the line exhibit properties of both metals and nonmetals and are termed metalloids or semimetals. Elements to the far right of the periodic table are nonmetals. The exception is hydrogen (H), the first element on the periodic table.

Explanation:

Answer:

looking at its metallic luster

Explanation:

Elements may be classified as either metals or nonmetals based on their properties. Much of the time, you can tell an element is a metal simply by looking at its metallic luster, but this isn't the only distinction between these two general groups of elements. Most elements are metals.


It is found that after 24!hours 1/8 of the mass of a sample of a radio-active isotope remains What is the half-life of this isotope?

Answers

Answer:7.72 years

Nuclear half-life expresses the time required for half of a sample to undergo radioactive decay.

Explanation:

0.01 = 67.0 ×[tex](\frac{1}{2}) ^{\frac{98.0} {1/2 } }[/tex] [tex]\frac{0.01}{67.0}[/tex] = 0.000149=[tex](\frac{1}{2}) ^{\frac{98.0} {1/2 } }[/tex]

[tex]^{\frac{98.0} {1/2 } }[/tex] =log[tex]_{0.5}[/tex] (0.000149)=12.7

[tex]^{\frac{98.0} {1/2 } }[/tex]=7.72 years

Hope this helps have a great day/afternoon :)

Please help will give brownies

Answers

Answer:

1.A 2.B

Explanation:

your welcomme glade to help

The first ionization energy of fluorine and iodine

Answers

Answer:

The most electronegative atom, fluorine, is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7. First Ionization Energy of Iodine First Ionization Energy of Iodine is 10.4513 eV.

Explanation:

Calculate the mass percent of sulfuric acid in a solid sample given a 0.8390g sample of that solid required 32.22 mL of 0.2012 M NaOH for neutralization.
A) 62.11
B) 2.64
C) 37.89
D) 75.78
E) 1.27

Please give an answer and an explanation, thanks!

Answers

Answer

C

Explanation:

i remember learning this

Mass percentage does not have any unit as numerator and denominator contains the same unit. The percentage of sulfuric acid in solid sample is 38.07%.

What is percentage by mass?

Mass percentage represents the the percentage of each element that is making a particular compound.

Mathematically,

Percentage of mass = (component’s mass ÷ total mass) x 100%

[tex]\rm 2 NaOH aq + H _{2} SO _{4} aq → Na _{2}SO _{4}aq + 2 H _{2} O[/tex]

Volume of NaOH solution = 32.22 mL = 0.03222 L

Concentration or molarity of the NaOH solution = 0.2012 M

Moles of NaOH : 0.03222×0.2012=0.006444mol

2 moles of sodium hydroxide reacts with 1 mole of sulfuric acid.

0.006444mol of sodium hydroxide reacts with =0.006444÷2=0.003222mol of sulfuric acid.

Mass of sulfuric acid neutralized = 0.003222 moles × 98.08 g/mol =0.31601376g

Percentage of sulfuric acid in solid sample= (0.31601376g÷0.8390g)×100=38.07%

Thus the percentage of sulfuric acid in solid sample is 38.07%.

To learn more about mass percentage, here:

https://brainly.com/question/27429978

#SPJ2

The mass of an object is 24g and the volume of the object is 16 mL. Calculate the
density of the object?

Answers

Answer:

D = m/v

Explanation:

So m = 24g and v = 16mL. (I assume these are the units being used). Then, we get D = 24g/16mL which is 1.5 g/mL


When 3.00 grams of methane, CH,, reacts according to the balanced equation below, how many molecules of water are produced?
CH, + 202 - CO2 + 2H20

Answers

Answer:

2.41×10²³ molecules of water

Explanation:

Given data:

Mass of methane = 3 g

Molecules of water formed = ?

Solution:

Chemical equation:

CH₄ + 2O₂    →     CO₂  + 2H₂O

Number of moles of methane:

Number of moles = mass/ molar mass

Number of moles = 3 g/ 16 g/mol

Number of moles = 0.2 mol

Now we will compare the moles of water with methane.

               CH₄           :              2H₂O

                  1              :                  2

                0.2            :             2 × 0.2 = 0.4 mol

Molecules of water:

1 mole = 6.022×10²³ molecules of water

0.4 mol ×6.022×10²³ molecules of water / 1mol

2.41×10²³ molecules of water

what is octane number​

Answers

Answer:A measure of performance of fuel for internal combustion engines. Stated simply, a higher octane rating corresponds to more engine power and less knocking or other pre-ignition problems.

Explanation:

I'm also in chemistry.

Answer:

Explanation:

figure indicating the antiknock properties of a fuel, based on a comparison with a mixture of isooctane and heptane.

Infer Why is a mechanism needed to remove carbon
dioxide gas from your cells?

Answers

Answer:

Because too much Carbon Dioxide can kill us.

Explanation:

^^ what he said. carbon dioxide, if there is enough in our body, can eventually kill us. it can be seen with deep sea divers, which after several continuous deep dives can have a excessive amount of carbon dioxide in there body to a lethal amount, having to force them into special rooms which allows the deep sea divers to decompress slowly and remove a good bit of the dioxide to lower the amount in them.

A number in front of a chemical formula

Group of answer choices

subscript

coefficient

Answers

Answer:

the answer is coefficient

Answer:

Coefficient is your answer

HOPE THIS HELPED YOU

PLEASE MARK AS THE BRAINLIEST (ㆁωㆁ)

An ice cube is placed in a glass of water. Which of the following best explains the
heat transfer?

A: The thermal
is moving
from the water to from the ice cube into the water into the water
causing the
temperature of
the water to
increase.
B: the thermal energy is moving from the water to the ice cube causing the temperature of the water to decrease
C: the thermal energy is moving from the ice cube into the water causing the temperature of the water to increase
D: the thermal energy is moving from the ice cube into the water causing the temperature of the water to decrease.​

Answers

D: the thermal energy is moving from the ice cube into the water causing the temperature of the water to decrease.​



Explain what a cold front is.

Answers

Answer:

A cold front is a boundary or zone that separates two air masses. The cooler more dense mass replaces the warmer.

hope this helps :)

Explanation:

Answer:

A cold front is a boundary or zone that separates two air masses. The cooler more dense mass replaces the warmer.

Explanation:

i am smart.....( i think )

What are the names of the two categories of living organisms?

Answers

Answer:

Prokaryotes (which are bacteria and archea)

Eukaryotes (which is plants, animals, protists and fungii)

I need help pls help ASAP I'll give brainliest​

Answers

Answer: A

Explanation:

Answer:

The answer is A

Explanation:

when is an object in free fall

Answers

Answer:

a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.

When bonding, what is most likely to happen between the atoms listed below?

A.) Atom X will donate electrons to Atom Y
B.) Atom X will accept electrons from Atom Y
C.) Atom Y will accept electrons from Atom Z
D.) Atom Z will donate electrons to Atom X

Answers

Answer:

atom x will accept electrons from atom y

Explanation:

in bonding the main purpose is to gain stable electronic configuration hence atom y will give out the two valence electrons to atom x

this kind of bonding where one of the atom is the one donating the electrons is known as ionic bond.

Question 3 (4 points)
A dipole bond is formed when electrons are not shared equally in a covalent bond, resulting in a partial negative charge on one end of the
molecule and a partial positve charge on the other end.
O True
O False

Answers

The answer is true.

Please answer correctly !!!!!!! Will mark brainliest !!!!!!!!!!!!

Answers

I beleive it would be 0.8

the volume of water alone is 4.8

the volume of rock and water is 5.6

you would subtract them both to find the volume of the Rock.

which is a characteristic of the part of the atom marked A

Answers

Answer:

Please upload the picture and I can answer

Explanation:

Answering: it is mostly empty space

Explanation:

I WILL GIVE U BRAINLIEST!!!!!!!

Answers

Answer:

I think its b. if not sorry but its the one that makes most sense

Explanation:

Answer:

B

Explanation:

Hope this helps you have a nice day!

Other Questions
I need help and im mad beacuse i didnt get to get out the house because im stuck on this what was the immediate cause of the secession of southerners states from the union prior to the start of the civil war?(1) election of Abraham Lincoln to the presidency(2) passage of the kanas-Nebraska act (3) raid on harpers ferry by john brown (4) decision of the supreme court in the red Scott case A type of substance containing atoms of two or more different elements that are chemically bonded together is referred to as a the good thing about states having so much power is ???? What is the slope of the line represented by the points in the table? Which carboxylic acid can be combined with an alcohol to form the ester shown below? The major role of the Georgia General Assembly is to ________________. elect the governor determine the constitutionality of law propose and enact laws all of the above The pitcher struck out two batters, but the third batter hit a home run. Compound or complex sentence A recipe says it produces the best summer drink. The recipe calls for cup of lemonade for every 1 cups of iced tea. If 16 cups of the summer drink are made, how many of those are cups of lemonade? Re-create the table to give your answer. Which linear equation has no solution? 7b-2/5=6b-7/5 nudfghnkdfbvugyteugdyvbbbvybhjedfs What did Sun Yat-sen do in the late 1800s?o formed a society to expel the Manchus and establish a republicO argued that China should adopt all the values and ideas of the Westo urged the Chinese government to return to its pasto overturned the Qing government and became China's dictator What was the purpose and focus of study in Europe's first universities? Which shows a difference of squares?10 y squared minus 4 x squared16 y squared minus x squared8 x squared minus 40 x + 2564 x squared minus 48 x + 9 Which of the following does not pertain to the rivers in Georgia?ChattahoocheeSavannahBrasstown BaldFall Line One Newton equals .225 Help please :) Match the following What does in balance mean WILL GIVE BRAINLIEST 1 The day of Josephine and Cora's campout had finally arrived. The two friends had been planning the campout for more than two weeks. They picked out a spot for the tent in Josephine's backyard. They chose the games they wanted to play. Now they were at the store with Josephine's dad buying camping food. "This campout is going to be perfect," Cora said as she dropped a bag of marshmallows into the cart. "We have the perfect tent, the perfect games, and the perfect food!"2 Just then a loud clap of thunder sounded outside. The wind whipped as a bright flash filled the dark sky.3 "But not the perfect weather," Cora moaned.4 "That was thunder and that means rain. Rain means no camping," Josephine groaned.5 "I guess we can stop shopping!" Cora snapped. She began taking food out of the cart.6 As Josephine's father placed the food back in the cart, he told the girls not to give up on their campout. They paid for the food and went back to Josephine's house to wait out the storm.7 At dinnertime the sky remained dark gray as the rain continued to pour down outside. The girls sat in silence while they ate. Cora looked out the window and said sadly, "I can't believe it's still raining. Our campout was supposed to be perfect."8 Josephine nodded as she looked from her plate to the window. Josephine's father told the girls that just because something seems impossible doesn't mean it can't happen. He told them to finish eating, go upstairs, and get ready for the campout.9 They looked out the window and wondered how they could still have a campout. How would they stay dry? How would Josephine's father build a fire with wet wood? It was not possible that they could camp in the backyard. Josephine and Cora gathered their sleeping bags and games anyway. They walked slowly down the stairs.10 When the girls got to the bottom of the steps, they smiled. Josephine's living room looked like a forest. The chairs and tables were gone, and potted plants took their place. A fire crackled in the fireplace. Strings of tiny lights glittered like fireflies on the walls. Best of all, the tent was set up in the middle of the room. Josephine and Cora were going to camp after all!11 Josephine and Cora learned that the rain didn't have to spoil their fun. They didn't need to be outside to camp. They didn't need a real campfire to cook hot dogs or marshmallows. Josephine and Cora's indoor campout was perfect because they didn't give up on it.Read the passage on the left to answer the following questions:3) Which sentence BEST describes the theme of this story?A) If you're hopeful, the weather could improve. B) Don't give up when something seems impossible. C) Sometimes you have to change your plans. D) Facing the truth is always the best choice. 4) Which sentence BEST explains the lesson Josephine and Cora learned?A) Good friends are hard to find. B) Always look on the bright side. C) Spending time with family is important. D) Sharing with others is important. -2.5 (4x-3)combine like terms to create and equivalent expression