1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lakkis [162]
4 years ago
15

A scientist has two kinds of solutions. The first solution is Solution A, which is an $80\%$ acid solution. The second solution

is Solution B, which is a $30\%$ acid solution. (a) Find the amount of Solution A (in mL) that must be added to $500$ mL of Solution B in order to produce a $70\%$ acid solution. (b) Find the amount of Solution A and Solution B (in mL) that can be combined in order to form a $100$ mL solution that is $50\%$ acid. (c) Does there exist a combination of Solution A and Solution B that is $90\%$ acid?
Mathematics
1 answer:
devlian [24]4 years ago
7 0

Answer:

Step-by-step explanation:

a ) Let the volume required be v .

v x .8 + 500 x .3 / ( v + 500 ) = .7

.8 v + 150 = .7 v + 350

.1 v = 200

v = 2000 mL

b )

Let the volume of solution A  required be v . The volume of solution of B required will be 100 - v

v x .8 + ( 100 - v ) x .3 / 100 = .5

.8 v + 30 - .3 v = 50

.5 v = 20

v = 40 mL

volume of solution B = 60 mL .

c )

It is not possible because 90 % is more than 80 % the concentration of solution A . Any mixture will have concentration less than 80 % .

volume of solution B = 60 mL

You might be interested in
Need helpp fastt plss will give brainliest to who is correct plss helpp
ivann1987 [24]
The answer is 221 I did the work
7 0
3 years ago
It is believed that 11% of all Americans are left-handed. In a random sample of 100 students from a particular college with 1012
tia_tia [17]

Answer:

Step-by-step explanation:

We can calculate this confidence interval using the population proportion calculation. To do this we must find p' and q'

Where p' = 14/100= 0.14 (no of left handed sample promotion)

q' = 1-p' = 1-0.14= 0.86

Since the requested confidence level is CL = 0.98, then α = 1 – CL = 1 – 0.98 = 0.02/2= 0.01, z (0.01) = 2.326

Using p' - z alpha √(p'q'/n) for the lower interval - 0.14-2.326√(0.14*0.86/100)

= -2.186√0.00325

= -2.186*0.057

= 12.46%

Using p' + z alpha √(p'q'/n)

0.14+2.326√(0.14*0.86/100)

= 0.466*0.057

= 26.5%

Thus we estimate with 98% confidence that between 12% and 27% of all Americans are left handed.

6 0
3 years ago
Using your own words or illustrations, explain the addition rule for equations. (in other words, don't just restate the rule wor
Dmitriy789 [7]

Step-by-step explanation:

This rule states that the same value can be added to both sides of an equation without interfering with the solving process of the equation

4 0
3 years ago
What is the area of the smallest scalene triangle whose side lengths are prime numbers?
joja [24]

Answer:

area = 10.28 units²

Step-by-step explanation:

Smallest prime numbers I can think of is 2, 3 & 5 but that will not make a triangle.

3, 5, & 7 will

area = 1/2(7)(2.9375) = 10.28 units²

4 0
3 years ago
Read 2 more answers
6. Find the slope of the line that passes through the following 2
vitfil [10]

Answer:

You would do the change in y over the change in x.  

That means you subtract your y values and that's the numerator.  Subtract your x values and that is your denominator.  Then simplify.

(4 - 4)

______

(-2 - 2)

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • There are 12 small gift bags in each bag came home one toy and some stickers that are 36 stickers is a equal number of stickers
    5·1 answer
  • Triangle QRS, with vertices Q(6, -2), R(4, -7), S(2, -5), is drawn inside a rectangle, . What is the area, in square units, of t
    5·1 answer
  • Number of feet in a mile
    15·2 answers
  • Arrange the given numbers in descending order 4/5,0.09,4,9,2/4
    11·2 answers
  • 170 ÷15 = 15 x ______ = 170
    6·1 answer
  • ∠1 ​ and ∠2 are supplementary.
    8·1 answer
  • Bertha and Vernon are competing in a diving competition. Bertha's dive ended -54 m from the starting platform. Vernon's dive end
    6·1 answer
  • How do you answer this angle problem?
    12·1 answer
  • For each fraction, decimal, or percent, write the equivalent number from the list below. 0.68, 19/50, 9/20, 80%, 0.54. A. 38% __
    11·1 answer
  • Luis wants to buy a home priced at $315,000. He plans to finance this amount less the down payment required. His mortgage paymen
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!