The conversion of ammonium cyanide to urea is a second-order reaction. This means that the concentration C of ammonium cyanide at time t is given by 1/C = kt + 1/C0, where C0 is the initial concentration and k is the rate constant. Assume the initial concentration is known to be 0.1 mol/L exactly. Assume that time can be measured with negligible uncertainty.

a. After 45 minutes, the concentration of ammonium cyanide is measured to be 0.0811 ? 0.0005 mol/L. Estimate the rat? constant k, and find the uncertainty in the estimate.

b. Use the result in part (a) to estimate the time when the concentration of ammonium cyanide will be 0.0750 mol/L, and find the uncertainty in this estimate.

Answers

Answer 1

Answer:

your answer could be A

Step-by-step explanation:


Related Questions

Which of the following is an example of an improper fraction?
A. 3
B. 9/5
C. 5/9
D. 1 1/2

Answers

B and C those are improper fractions

Two functions are shown below

f(x)=6x+3
g(x)=3x-2
What is the product of f(3) and g(-4)​

Answers

Answer:

-294

Step-by-step explanation:

f(3) = 6(3) + 3

f(3) = 18 + 3

f(3) = 21

g(-4) = 3(-4) - 2

g(-4) = -12 - 2

g(-4) = -14

f(3) * g(-4) = 21 * -14 = -294

Hope this helps!

Answer:

a. -294

Step-by-step explanation:

f(x)=6x+3

f(3)=6(3)+3

f(3)= 18 +3

f(3)= 21

g(x)=3x-2

g(-4)=3(-4)-2

g(-4)=-12-2

g(-4)=-14

21 x -14 = -294

An up-and-coming artist has 85 followers on Twitter and this number doubles every week. In what week will the artist first reach 1,000 followers? Use at least two different methods to come up with your answer

Answers

Answer:

11.77

Step-by-step explanation:

1000÷85=11.77

11.77×85=1000

Suppose you need to build a box with a surface area of 90 square feet. If the length is 5 feet and the height is
2 feet, what is the width of the box?

Answers

Answer:

Hi there!

Your answer is:

W=17.5feet

Step-by-step explanation:

We use the surface area form for a cuboid:

2h(l+w)=SA

Fill in the known values!

2(2)* (5+ W) = 90

Solve for W!

4*(5+W)=90

20+4w=90

-20

4w=70

/4

W=17.5feet

You must choose five teammates from a group of 12 people. How many different teams can you form?

Answers

Answer:

2

Step-by-step explanation:

Answer:

792

Step-by-step explanation:

Combination question. The formula for which is:

n! / (r! (n - r)!)

12!/(5!*(12-5)!)

= 12!/(5!*7!)

= 792

Note: 12! = 12 x 11 x 10 x ... x 3 x 2 x 1

Kayla thinks that the slope of a vertical line is undefined, while Joshua
argues that the slope of a vertical line is zero. Who is correct?
a. Kayla b. Joshua

Answers

Answer:

Kayla

Step-by-step explanation:

Vertical lines are always undefined because if your answer has to be divided by zero, the answer is an undefined operation.

Horizontal lines always have the slope of zero!

The slope of a vertical line is undefined.

Kayal is correct.

The rate of change in the table is -6.

The slope of the graph is 3/2.

What is a slope?

The slope of a is the change in the y coordinate with respect to the change in the x coordinate.

We have,

A vertical line means there is no change in the x-coordinate.

i.e slope = change in y-coordinates / change in x-coordinate

slope = change in y-coordinate / 0
slope = undefined

The slope of a vertical line is undefined.

Now,

From the given table we see that there is a change of 1 for the x-values and a change of -6 in the y-values so,

Rate of change in the table:

= change in y values/change in the x values

= -6 / 1

= -6

Now,

Take any two points on the graph such as:

(a, b) = (4, 6) and (c, d) = (-4, -6)

The slope of the graph:

= (d - b) / (c - a)

= -6 - 6 / -4 - 4

= -12 / -8
= 3 / 2

Thus,

The slope of a vertical line is undefined.

Kayal is correct.

The rate of change in the table is -6.

The slope of the graph is 3/2.

Learn more about slope here:

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I always get this one wrong I just need help finding out the right answer

Answers

Answer:

b,c,d,f

Step-by-step explanation:

ur welcome

brainliest appreciated

I need you to acknowledge I’m bryce hall

ANSWER ASAP WILL GIVE EXTRA POINTS AND BRAINLIEST

Answers

Answer: 2/7 will be more

Step-by-step explanation:2/7 times 11 each then gets 22/77 then 3/11 times 7 gives it 21 over 77 22 is more than 21

Answer:

common denom is 77 so 2/7=22/77 and 3/11=21/77

>

A CLASS OF 28 STUDENTS HAS 12 GIRLS.WHAT IS THE RATIO OF GIRLS TO BOYS

Answers

Answer:

3:7

Step-by-step explanation:

thats the ratio simplified

Answer:

12:16

Step-by-step explanation:

If f(x) = 6x + 2, which of the following values would complete the table shown?

Answers

Answer:

38

Step-by-step explanation:

f(x)=6x+2

6x6 (6 sqaured)

f(36)=36x+2

Now we add 36+2

        38

Answer:

14 and 50 :)

Step-by-step explanation:

I worked for 12 hours each day for 6 days then the next day I worked 9 hours how many did I work in all

Answers

Answer:

81

Step-by-step explanation:

12(6) + 9

72 + 9

81......

Answer:

81.

Step-by-step explanation:

(12 x 6) + 9 = 81

12 x 6 = 72

72 + 9 - 81

solve 3x+11=k for x

a. x=k-11
b. x= k+11/3
c. x= k-11/3
d. x= 3k-11

Answers

I think it’s C because but I’m not really sure because I got x=k/3-11/3

Which equation represents the sentence?

Four more than one-third a number is equal to 14.

A. 1/3(n+4)=14
B. N/3 + 4= 14
C. 4n + 1/3 = 14
D. 4(n/3) = 14


Can y'all explain to me I don't get it pleaseee help

Answers

The answer is B: n/3 + 4 = 14.
Four more means we are adding four
One third of a number means we are multiplying n by 1/3, which can be written as 1/3n or n/3.

$4.99 for 6 cans or $7.99 for 10 can

Answers

I would put $7.99 for 10 can

Answer:

$7.99 for 10 cans

Step-by-step explanation:

83 cents per can or 78 cents per can

It is cheaper to do 7.99 for 10 cans

Find the midpoint of the segment with the following endpoints.
(8,9) and (4,3)

Answers

Answer:

The midpoint of the segment is (6,6).

Step-by-step explanation:

To solve this problem, we are going to use the midpoint formula, which is shown below:

( (x1+x2)/2, (y1+y2)/2 )

If we plug in the values that we are given in the question, we get:

( (8+4)/2, (9+3)/2)

We should add together the two numbers in the numerator of each fraction to begin the simplification process:

(12/2, 12/2)

Now, we can perform the division to find our final answer.

(6,6)

Therefore, the correct answer is (6,6).

Hope this helps!

12
What type of number is -?
3
Choose all answers that apply:
Whole number
B
Integer
Rational
D
Irrational

Answers

Answer:

BBbbBbbbbbbbbbbbbbbbbb

bbbbbbbbbbbb

Step-by-step explanation:

integer

Rational

A chicken traveled 4.5 miles in 30 minutes . A squirrel traveled 4 miles in 20 minutes . Which animal traveled at a faster rate ?

Answers

Answer:

The squirrel

Step-by-step explanation:

4.5/30 is 0.15 per minute while the squirrel is 4/20 which equals 0.2 per minute. 0.2 is greater than 0.15 making the squirrel faster. Hope this helps!

will give brainlist​

Answers

B
Hope this helped I only did like 1 lesson on functions

Answer:

B is the correct answer I the math hopes this helped!

Which of the following BEST describes how use of the multiplication property of equality to isolate the variable x below?

–3x = 12

Answers

Answer:

multiply both sides of the equation by -1/3

Step-by-step explanation:

multiplication property of equality says we can multiply both sides of the equation by the same amount to form an equivalent equation

james recpe call 6/8 cup of milk

Answers

Answer:

3/4 cup is also an equivalent fraction for 6/8

Step-by-step explanation:

Lin has a drawing with an area of 20 in²

If she increases all the sides by a scale factor of 4, what will the new area be?

Answers

Answer:

320 in²

Step-by-step explanation:

Given that Lin has a drawing that has an area of 20 in², since Lin used a scale factor of 4 to increase all sides, therefore the new area would be increased by the following:

Square of scale factor of the side = scale factor of area

4² = scale factor of area

16 = scale factor of area

Multiply the original area by 16

20 × 16 = 320 in²

Karen used a birthday check her mother gave her to start a savings account. She plans to save $25 per
month as well. After 8 months, Karen has $250. Write and solve a linear equation to find the original check
amount from Karen's mother.

Answers

Answer:

Explanation:

Lets just say the amount her mom gave her is c

and the months is a

the equation would be

c + 25a = 250

we can plug in 8 for a, cause we know its been 8 months,

c + 25(8)= 250

then do the parentheses

c + 200 = 250

subtract the 200 to isolate the variable c

c = 50

then you get c = 50,

Karen's mom gave her a check for $50.

(why karen btw. i would never give $50 to a karen)

The linear equation to calculate the amount from Karen's mother is

A + 25x = 250

where A is the amount and x is the number of months

The amount from Karen's mother is $ 50

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the amount given to Karen by her mother be = A

Let the total number of months be = x

The value of x is = 8 months

The total amount Karen has after 8 months = $ 250

The amount Karen saves per month = $ 25

Now , the equation will be

Total amount Karen has after 8 months = amount given to Karen by her mother + ( amount Karen saves per month x total number of months )

Substituting the values in the equation , we get

250 = A + 25x

On simplifying the equation , we get

A + 25x = 250

when x = 8

A + 25 ( 8 ) = 250

A + 200 = 250

Subtracting 200 on both sides of the equation , we get

A = $ 50

Therefore , the value of A is $ 50

Hence , The linear equation to calculate the amount from Karen's mother is  A + 25x = 250

where A is the amount and x is the number of months

The amount from Karen's mother is $ 50

To learn more about equations click :

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A young adult burns 11 calories per minute while jogging. Which function shows how many calories that person will burn in x minutes

Answers

Y (Total Calories burnt) = 11 X

Can someone help me with this??

Answers

Answer:

Step-by-step explanation:

Let the number of weeks = x

4*2.54 + 4x = growth for A

10*2.54 + 1*x= growth for B

So they will be the same when the 2 left sides are equated.

10.16 + 4x = 25.5 + x            Subtract 10.16 from both sides

4x =25.5-10.16 + x                Combine

4x = 15.34 + x                       Subtract x from both sides.

4x-x = 15.34

3x = 15.34                             Divide by 3

x = 15.34/3

x = 5.11

So the answer is just a little over 5 weeks.

plz someone help on this question​

Answers

Answer:

Hi there!

Your answer is:

1050 liters per 6 days

Step-by-step explanation:

350liters per 2 days

*3 to determine 6 days

1050 liters per 6 days

Hope this helps

Answer:

1050

Step-by-step explanation:

350 liters per 2 days

to get 6 days you will need to multiple 2 by 3

you need to do that to 350 too

350   x    3 = 1050

your ration is 350:2

make it to

1050:6

let me know if you need more help

Find the tan A and sin B exactly.

Choices -

A - tan A = 3/4, sin B =5/3

B - tan A = 4/3, sin B = 3/5

C - tan A = 3/4, sin B = 3/5

D - tan A = 4/3, sin B = 5/3

Answers

Answer:

B - tan A = 4/3, sin B = 3/5

Step-by-step explanation:

First, lets find the length of the third side

b = √15² - 12² = √225 - 144 = √81 = 9

Now, lets get Tan A and Sin B

Tan A = 12/9 = 4/3Sin B = 9/15= 3/5

Correct option is B

work out the volume of the cuboid in cm³

Answers

Answer:

it is 192000 is got it right

WHICH PROPERTY JUSTIFIES STEP 2 PLS HELP !!!! ILL MARK BRAINLIST

Answers

Answer:

Distributive property.

Step-by-step explanation:

To go from 3(6x + 2) - 4x to 18x + 6 - 4x, you would need to use the distributive property.

5x- 13x - 44 = 2 please help!!!!!!!!!!!!!

Answers

8x-44=2
8x=46
X=5.75
Same thing I just put it in decimal form

1/4 ÷ 5/6 = 1/a x b/c


a=4 b = 5 c=6
a=1 b=6 c=5
a=1 b=6 c=5
a=4 b=6 c=5

Answers

Answer:

this

answer

will

be

in

your

book

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