A study was conducted to see if increasing the substrate concentration has an appreciable effect on the velocity of a chemical reaction. With a substrate concentration of 1.5 moles per liter, the reaction was run 15 times, with an average velocity of 7.5 micromoles per 30 minutes and a standard deviation of 1.5. With a substrate concentration of 2.0 moles per liter, 12 runs were made, yielding an average velocity of 8.8 micromoles per 30 minutes and a sample standard deviation of 1.2. Is there any reason to believe that this increase in substrate concentration causes an increase in the mean velocity of the reaction of more than 0.5 micromole per 30 minutes

Answers

Answer 1

Answer:

There is not enough evidence

Explanation:

For  1.5 moles substrate concentration per liter

Reaction ( n2 ) = 15 runs

average velocity ( x2 ) = 7.5 micromoles per 30 minutes

standard deviation ( s2 ) = 1.5

For 2.0 moles substrate concentration per liter

Reaction( n1 ) = 12 runs

average velocity ( x1 ) = 8.8 micromoles per 30 minutes

standard deviation ( s1 )  = 1.2

Show Reason to believe that this increase in substrate conc causes an increase in mean velocity

Hypothesis test

H0 : μ1 - μ2 = 0.5

H1 : μ1 - μ2  > 0.5

level of significance ( ∝ ) = 0.01

attached below is a detailed solution to the problem

P-value ( 0.073 ) > level of significance ( 0.01 ) hence we fail to reject the null hypothesis

hence there in not enough evidence to believe that this increase causes an increase in the mean velocity of the reaction of more than 0.5 micromole per 30 minutes

A Study Was Conducted To See If Increasing The Substrate Concentration Has An Appreciable Effect On The

Related Questions

how humans can improve the negative aspects of soil use FULL SENTENCES 50 POINTS PLEASE HELP

Answers

Answer:

Using diverse nutrient sources can help maintain soil health. Manure and compost add organic matter as well as an array of nutrients, but using just compost or manure to meet the nitrogen needs of the crop every year can result in excessive phosphorus levels in the soil.

What’s the answer please give me the answer

Answers

Answer:

replication

:D

I’d appreciate any help

Answers

Answer:

27 g

Explanation:

From the question,

n = Mv...................... Equation 1

Where n = number of mole of Al₂SO₄,  M = Molarity of Al₂SO₄, v = Volume of the solution.

Given: M = 0.12 mol/L, v = 1.5 L.

Substitute these values into equation 1

n = 0.12×1.5

n = 0.18 mol

Also,

n = Mass(m)/Molar mass (m')

n = m/m'.

m = n×m'......................... Equation 2

Given: The molar mass of Al₂SO₄ = (27×2)+32+(16×4) = 150 g/mol

Substitute into equation 2

m = 0.18×150

m = 27 g

How many moles of KClO3 are needed to produce 480 grams of O2?

Answers

Answer:

2:3

You'd need 33.3 moles of potassium chlorate, KClO3 , to produce that much oxygen. Notice that you have a 2:3. mole ratio between potassium chlorate and oxygen gas, which means that, regardless of how many moles of the former react, you'll always produce 3/2 times more moles of the latter.

Explanation:

Adi loves the smell of lavender, so she decides to press a few petals of the flower until they release a few drops of oil. She wants to determine the molecular weight of the oily substance to try to identify the fragrance she likes so much. Her lab instructor tells her that her experiment will not work. Why do you think it will not work?

Answers

Answer:

See Explanation

Explanation:

What Adi failed to realize is that the oily substance that was obtained from lavender consists of a mixture of substances. It is not only the required  fragrance that is present in the extract.

This experiment will not work because those other components in the mixture may be erroneously identified when they show up in the mass spectrum of the extract and may be mistaken for the fragrance in question.

Hence the experiment will not work because; if some kind of separation method is not used to identify other impurities in the oil, many other substances may be mistaken for the actual fragrance.

Which of the following accurately describes the orbital path of most planets in our solar system?

The orbital path is in a perfect circle.

The orbital path looks circular.

The orbital path is in a large elliptical shape.

The orbital path varies greatly from planet to planet.

Answers

It is in a large elliptical shape!

Pick 1 answer, please help!

Answers

Answer:

B

Explanation:

Answer:   D

Explanation:  no explanation just D

Which of the following answers below is the correctly balanced half-reaction for the reduction of the SO4 ^-2 ion in acid solution? The answer is C, but I don’t understand why. Thanks in advance :-)

Answers

Answer:

C

Explanation:

The oxidation number of Sulphur in SO4^2- is;

x + 4(-2) = -2

x - 8 = -2

x = -2 + 8

x = 6

Now,

the oxidation number of sulphur in H2SO3 is

2 (1) + x + 3(-2) = 0

2 + x -6 = 0

-4 + x = 0

x = 4

Hence, the oxidation number of sulphur changed from +6 to +4 which signifies  gain of two electrons as shown in option C.

1. The largest particles that a stream deposits as it enters a pond are 8 centimeters in diameter. The
minimum velocity of the stream is approximately
1) 100 cm/sec 2) 200 cm/sec 3) 300 cm/sec 4) 400 cm/sec

Answers

Don’t click on the link it’s a scam

can anyone help me with this question please! asap

Answers

Answer:

The correct answer to that question is glaciers, waves, wind.

Answer:

I think it is D but I could be wrong.

Explanation:

1.9x10^23 atoms of sulfur to grams of sulfur

Answers

Answer:

see explanation and punch in the numbers yourself ( will be better for your test)

Explanation:

If you are given atoms you need to divide by Avogadro's number 6.022x10^23

then you will have moles of sulfur-- once you have moles multiply by the molar mass of sulfur to go from moles to grams

mm of sulfur is 32 g/mol

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the grams of sulfur in  1.9x10²³ atoms of sulfur is 9.92g.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance.

Given number of atoms= 1.9x10²³atoms

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

mole =given number of atoms ÷ 6.022×10²³(Avogadro number)

Substituting the values

mole=1.9x10²³÷ 6.022×10²³

mole = 0.31 mole of sulfur

Mole = given mass÷ Molar mass

Molar mass of sulfur=32g/mol

mass of sulfur =0.31 mole ×32g/mol

mass of sulfur=9.92g

Therefore, the grams of sulfur in  1.9x10²³ atoms of sulfur is 9.92g.

To know more about mole, here:

https://brainly.com/question/15209553

#SPJ2

when copper wires are made, a copper rod is pulled into a narrower wire. Explain how metallic bonding allows this to happen

Answers

Answer:

possibly because of the malleability of metals

Explanation:

In metallic bonding, electrons are delocalized and move freely among nuclei. When a force is exerted n the metal, the nuclei shift, but the bonds do not break, giving metals their characteristic malleability.

1. Newton’s second law of motion describes the relationship between force, mass, and acceleration. Write the equation.

Answers

Answer:

F=ma where F = force in N, m = mass in g and a = acceleration in [tex]m/s^{2}[/tex]

How is a sound wave transmitted? Please help me I have a test.

Answers

Answer: energy is transferred through vibration of air particles or particles of a solid through which the sound travels.

Answer:

Sound is transmitted by vibrating a object and the waves move through particles.

Explanation:

1. ______is an ion, or molecule that is a proton donor.​

Answers

Brønsted Lowry acid is a proton donor (PD), while a Brønsted-Lowry base is a proton acceptor (PA).

Hopefully this helps

A 1.2 M solution of a weak base B is prepared. Using a pH meter, the pH is measured to be 11.82. Calculate the base ionization constant

Answers

Answer:

Kb = 3.64x10⁻⁵

Explanation:

First we calculate the pOH of the solution:

pOH = 14 - pHpOH = 2.18

Then we calculate [OH⁻]:

pOH = -log[OH⁻][OH⁻] = [tex]10^{-pOH}[/tex][OH⁻] = 0.0066 M

For a weak base solution with a relatively high concentration, we can use the following formula:

[OH⁻] = [tex]\sqrt{Kb*C}[/tex]

Where C is the concentration of the weak base solution (1.2 M in this case).

With the formula above we can calculate Kb:

0.0066  = [tex]\sqrt{Kb*1.2}[/tex]Kb = 3.64x10⁻⁵

In at least 4 complete sentences, describe the similarities and differences between Avogadro's Law and Charles' Law.

Answers

answer

Avogadro's law states that, at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles present. In other words, equal volumes of gases at the same pressure and temperature contain the same number of molecules - this is true regardless of their physical properties or chemical nature.

This number of molecules is

6.022

10

23

and is known as Avogadro's number,

N

A

.

Matematically, Avogadro's law can be written like this

V

n

=

c

o

n

s

t

, or, better yet,

V

1

n

1

=

V

2

n

2

.

Avogadro's law, as well as Boyle's law and Charles' law, are special cases of the ideal gas law,

P

V

=

n

R

T

. If temperature and pressure are kept constant, and knowing that

R

is of course constant, then

P

V

=

n

R

T

P

V

n

=

R

T

V

n

=

R

T

P

=

c

o

n

s

t

, which represents Avogadro's law.

The ideal gas law can also be written to incorporate

N

A

, since the number of moles are actually the number of molecules divided by Avogadro's number

P

V

=

N

N

A

R

T

, where

N

represents the number of molecules.

An experiment was conducted to see which metal pot would be better for cooking food quickly. The table below shows how quickly small pieces of wax melted during the experiment.

Type of metal
Time for the wax to melt (seconds)
Aluminum
27
Bronze
45
Copper
15
Steel
80

The following statement was made after the data were examined: “Copper pots are the best pots for cooking food quickly.” Which term best describes this statement?
conclusion
hypothesis
procedure
result

Answers

Answer:

Conclusion.....hope this helps

Answer:

conclusion

Explanation:

1. What do gram-formula mass and atomic mass have in common? How are they different?

Answers

Because they do not have the same qualities therefore they are different

56.8 grams of glucose is dissolved in acetic acid. The boiling point of the acetic acid raises to 126.6°C. What is the molal concentration of the solution?

Answers

Answer:

Molal concentration of glucose = 2.64 m

Explanation:

The excersise can be solved by the formula for colligative property, elevation of boiling point.

ΔT = Kb . m . i

As glucose (C₆H₁₂O₆) is an organic compound, i = 1. (No ions generated)

ΔT = Boiling T° for solution - Boiling T° of pure solvent

Kb = Ebulloscopic constant.

We need data from acetic acid.

Boiling T° of pure solvent: 118.1°C

Kb = 3.22 °C/m

We replace data:

126.6°C - 118.1°C = 3.22°C/m . m . 1

(126.6°C - 118.1°C) / 3.22 m/°C = m

Molality = 2.64 mol/kg

Describe the composition of a molecular compound. What are two major characteristics of molecular compounds?

Answers

Answer:

A molecular compound is composed of two or more non metallic elements that are held together by covalent bonds.

The two major characteristics of molecular compounds are;

1.) They are held by covalent bonds

2.) They generally have poor conductivity

Explanation:

A molecular compound is one where two or more molecules come together to form a compound. Unlike ionic compounds that combine by the transfer of electrons, molecular compounds form by sharing electrons. The pairing of the electrons is what holds the molecules together and is known as covalent bonding.

A molecular compound has various characteristics, some of which are;

- Generally low melting and boiling points

- Soft solid forms

- Low enthalpy of fusion and vaporization.

But the two major characteristics of molecular compounds are;

1.) They are held together by covalent bonds.

The elements in a molecular compound share their electrons by having their atoms bond chemically to each other.

2.) They generally have poor conductivity

Molecular compounds do not conduct electricity and heat properly. Because they are formed by sharing electrons, they usually have no free electrons left to conduct electricity.

Match these items.
No links please!

Definitions:
1. Built the first American A.C. generator.
2. Found a relationship between electricity and magnetism.
3. Associated with gas and oil.
4. First workable electric light bulb.
5. Developed the equations E=mc^2
6. Provides majority of the energy in the United States.
7. Splitting heavy atoms
8. Produces plutonium
9. Powered by falling water or stream pressure
10. Thin silicon slices
11. Using heat from the earth

Term names:
a. Oersted
b. Geothermal
c. Edison
d. Einstein
e. Salt dome
f. Turbine
g. Fission
h. Westinghouse
i. Solar cells
j. Gas and oil
k. Breeder

Answers

[tex]\huge{\mathbb{\tt { QUESTION↓}}}[/tex]

1. Built the first American A.C. generator.

2. Found a relationship between electricity and magnetism.

3. Associated with gas and oil.

4. First workable electric light bulb.

5. Developed the equations E=mc^2

6. Provides majority of the energy in the United States.

7. Splitting heavy atoms

8. Produces plutonium

9. Powered by falling water or stream pressure

10. Thin silicon slices

11. Using heat from the earth

[tex]\huge{\mathbb{\tt {ANSWER↓}}}[/tex]

[tex]\color{black}{\tt {1.) \: h. \: Westing \: house}}[/tex]

Built the first American A.C. generator

[tex]\color{black}{\tt {2.) \: Oersted}}[/tex]

Hans Christian Oersted discovered the relationship between electricity and magnetism in 1820.

[tex]\color{black}{\tt {3.) \: j. Gas \: and \: oil}}[/tex]

Associated gas refers to the natural gas found in association with oil within the reservoir. There are also reservoirs that contain only natural gas and no oil, this gas is termed non-associated gas.

[tex]\color{black}{\tt {4.) \: c.Edison}}[/tex]

By January 1879, at his laboratory in Menlo Park, New Jersey, Edison had built his first high resistance, incandescent electric light. It worked by passing electricity through a thin platinum filament in the glass vacuum bulb, which delayed the filament from melting. Still, the lamp only burned for a few short hours.

[tex]\color{black}{\tt { 5.) \: d. Einstein}}[/tex]

E = mc2, equation in German-born physicist Albert Einstein's theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other.

[tex]\color{black}{\tt {6.)i.solar cells}}[/tex]

Energy Sources in the United StatesPetroleum (crude oil and natural gas plant liquids): 28% Coal: 17.8% Renewable energy: 12.7% Nuclear electric power: 9.6%"

[tex]\color{black}{\tt { 7.) \: g. fission}}[/tex]

Nuclear fission is a process by which the nucleus of an atom is split into two or more smaller nuclei, known as fission products. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.

[tex]\color{black}{\tt { 8.) Sorry \: but \: I \: don't \: know \: the \: answer}}[/tex]

[tex]\color{black}{\tt { 9.) Sorry \: but \: i \: don't \: know \: the \: answer}}[/tex]

[tex]\color{black}{\tt { 10. ) \: Sorry \: \: But \: I \: don't \: know \: the \: answer }} [/tex]

[tex]\color{black}{\tt {11.) \: b. Geothermal}}[/tex]

Geothermal/GSHP systems take advantage of nature's underground temperatures by exchanging heat with the earth using an underground network of water (or refrigerant) filled pipes. In the winter, the liquid pulls heat from the ground and transfers it to the house through an exchanger.

#CarryOnLearning

#LetsEnjoyTheSummer

→XxKim02xX

do weight loss Subliminals work?

Answers

Answer:

Some early research suggests that subliminal messages may influence food- and diet-related thoughts and behaviors. However, other research has found that subliminal messages with weight loss cues have no effect.

Explanation:

I have a Helium party balloon that can hold 3.0 liters of gas. If I blow up this balloon with 0.10 moles of oxygen gas at a pressure of 1.0 atmosphere, what is the temperature of the balloon?

Answers

Answer:

I am not yet sure on my answer

I would not want to give you wrong answers

Sorry

___ SeCl6 + ___ O2 --> ___ SeO2 + ___ Cl2

What is the balanced equation for these reactions?

I give Brainliest! Please no links

Answers

Answer:

SeCl₆ + O₂ → SeO₂ + 3Cl₂

Explanation:

Unbalanced:

SeCl₆ + O₂ → SeO₂ + Cl₂

Count the atoms.

On the left side, we have 1 Se atom, 6 Cl atoms, and 2 O atoms.

On the right side, we have 1 Se atom, 2 O atoms, and 2 Cl atoms.

So everything is balanced except for Cl. To balance, we put a 3 coefficient in front of Cl₂.

SeCl₆ + O₂ → SeO₂ + 3Cl₂

c:

How to Convert 0.75g of nitrogen gas (N2) to liters.

Answers

24

N2=22.4 liters

18g=22.4 litters

18÷.75=24

The importance of improving soil usage FULL SENTENCES 50 POINTS HELP PLEASE

Answers

Improving soil usage is important because healthy soil helps turn dead matter and minerals into plant nutrients , Improving soil usage helps as a protection against droughts
brainliest plz

How many moles of HCl are present in 1.30 L of a 0.50 M solution
0.50 moles
3.00 moles
O 0.65 moles
0 1.50 moles

Answers

Answer:

0.65moles of HCl was produced

where are human cells located (in living organisms)

Answers

all inside and out in the human body

the answer has to be 3 to 5 sentences for me to get full credit. ❤❤​

Answers

The periodic table is an important but rather dry scientific tool. It lists all the chemical elements, ordered by their atomic numbers. Elements with similar behavior are grouped in the same column (called a group), with metals generally on the left and non-metals (gases) on the right. Rows are called “periods” - hence, periodic table.


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