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Question 641653: A 1% solution of hydrochloric acid is required for a procedure. A 5% solution is available. How much of the 5% will be required to make 500 mL of a 1% solution?

Click here to see answer by lwsshak3(6460)

Question 641515: a chemist has 20 liters of a 10% acid solution.How many liters of pure acid must be added to produce a 25% acid solution?
Click here to see answer by lwsshak3(6460)

Question 637573: You are given a prescription for 100 mL of a 30% hydrochloric acid solution. The pharmacy carries 90% hydrochloric acid solution. How many mL of the concentration solution are needed to fill this prescription?
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Question 641661: how many bacteria are generated after 6 hours if it takes 10 minutes for a single bacteria to divide into 2 bacteria?
Click here to see answer by ankor@dixie-net.com(15624)

Question 641776: I have 480 gallons of acid at 7% strength. I am adding an acid that is at 25% strength. How do I found out how many gallons of acid, followed by the number of gallons of water needed to finish with 2100 gallons of acid at 7% strength?
Click here to see answer by ankor@dixie-net.com(15624)

Question 641817: How many gallons of a 35% saline solution must be mixed with 6 gallons of a 15% saline solution to make a 23% solution?
Click here to see answer by stanbon(57219)

Question 641852: Suppose a fuel mixture is 6% ethanol and 94% gasoline. How much ethanol (in gallons) must you add to one gallon of the fuel so that the new mixture is 10% ethanol?
Click here to see answer by stanbon(57219)

Question 208661: If tracey and max make their own specialty blend of coffee.they estimate that it costs about $1.00 for every 2 cups of coffee. Determine how much they are saving by making their own coffee
Click here to see answer by danielle43(2)

Question 642363: British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 240 grams of a copper-silver alloy that is 16% copper by weight?
Click here to see answer by josmiceli(9649)

Question 642405: there are 24 students in tamikas class. 3 of every 4 take instrumental music. how many students instrumental music?
Click here to see answer by stanbon(57219)

Question 642845: in what ratio must 25% alcohol be mixed with 60% alcohol to get a mixture of alcohol of 40%
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Question 642872: Thirty ounces of pure silver is added to 50 ounces of a silver alloy that is 20% silver. What is the percent concentration of silver in the resulting alloy?
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Question 642948: We have 24 Gallons of 10% lemonade. how many gallons of pure water must be added to produce 6% lemonade?
so far i have: 21.6 gal of water in the 10% solution
x gal of pure water
.94(24+x)gal of 6% lemonade
then i set up this equation: 21.6+x=.94(24+x)
after solving i got 16 gal of pure water. Is this correct?

Click here to see answer by ankor@dixie-net.com(15624)

Question 642967: We have a one pound coffee can. We will fill that can about 80% full with a grain that contains 12% protein. We will then fill the remaining 20% with another grain that contains 32% protein. What is the total percentage of protein the horse will receive a feeding? How much of each grain (the 12% protein and the 32% protein) should we put into that one pound coffee can so that the horse receives a total of only 15% protein?
Click here to see answer by ankor@dixie-net.com(15624)

Question 643006: This problem has me confused. Please show me what to do and how to get to the answer. Thank you

A store mixes Kenyan Coffee worth $10 per Kilogram and Turkish coffee worth $14 per Kilogram. The mixture is to sell for $11 per kilogram. Find out how much of each should be used to make a 528-Kilogram Mixture
Kenyan Should be ?kg
Turkish should be ?kg
Click here to see answer by lwsshak3(6460)

Question 643244: How do I put 45% of a mixture in algebraic form?
Click here to see answer by josmiceli(9649)

Question 643942: you need 25 ml 2% salt solution and you have 100 ml 5% salt solution. how much stock solution do you need? how much water?
Click here to see answer by lwsshak3(6460)

Question 643971: how many quarts of pure antifreeze must be added to 2 quarts of a 10% antifreeze solution to obtain a 50% solution?
Click here to see answer by josmiceli(9649)

Question 643987: How many lbs of sterling silver can I make with 80 lbs of pure silver?
Click here to see answer by Edwin McCravy(8879)

Question 644048: the problem is 5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?
I say it should be 0, my son and grandson say 15 because you do the multiplcation first and that takes away the last 5. I know you multiply first
But when I went to school many, many years ago, I was taught there would have to be ( ) around the 5 and the 0 to make it a separate quantity. Therefore, since there are no ( ) the 0 applies to the entire line.
Is this something the new math taught, not having the ( ) like grammar taught now changes rules I learned?

Click here to see answer by MathTherapy(1421)

Question 644071: how many grams of dextrose are in 500 mL of a 70% dextrose solution

Click here to see answer by KMST(1863)

Question 644072: Kamisha wants to line up her 4 stuffed polar bears on a shelf over her bed. how many different arrangements are possible?
Click here to see answer by lynnlo(4155)

Question 644072: Kamisha wants to line up her 4 stuffed polar bears on a shelf over her bed. how many different arrangements are possible?
Click here to see answer by katbit(6)

Question 644183: How many liters of a 20% alcohol solution must be mixed with 30 liters of a 90% solution to get a 80% solution?
Click here to see answer by Alan3354(30959)

Question 644151: How many liters of a 70% alcohol must be added to 50 liters of a 40% alcohol solution to produce a 50% alcohol solution ? tanx so mmuch

Click here to see answer by nerdybill(6948)

Question 644232: find the concentration of sugar as percent when 20 gram sugar mixed in 60 grams water ,how many more grams of sugar has to be added to make it 30% solution
can you please clarify the steps to solve it please
Best Regards
Luay
Click here to see answer by stanbon(57219)

Question 644255: David's Salarywas raised was 1st raised by 8% and after 6 months again rasised by 10% ,what is the net percent increase in his salary
thanks in Advance for the help and please clarify step by step
Best Regards
Luay
Click here to see answer by stanbon(57219)

Question 644410: in a chemistry lab, stephanie has to make a 37 milliliter solution that is 12% HCL. All that is in the lab is 8% and 15%. How many mL of each solution should she use to obtain the desired amount?
Click here to see answer by nerdybill(6948)

Question 644526: Ok I have a problem that I just can't seem to figure out how to write the formula. I have 40% cream and need a 96oz mixture of 16% cream by adding X number of ounces of 3.25% whole milk. Thank you for any help you can give me. Sarah
Click here to see answer by Alan3354(30959)

Question 644556: a paint mixture contains 15 gallons of base for every gallon of color. In 1440 gallons of paint how many gallons of color are there?
Click here to see answer by stanbon(57219)

Question 644691: 1. A television repair technician charges $65 to make a house visit and $40 asn an hourly rate. If the materials needed to repair the television total $89 and it takes him an hour to finisih the repair, find the total cost.

2. If a number is divided by 4,, the result is 15. What is the number.

3. A 21-Foot log must be cut into two pieces so that the larger piece is three feet longer than the shorter piece.
Click here to see answer by lynnlo(4155)

Question 644755: two metal alloys, containing 26% copper and 54% copper are to be mixed together to get 210 oz that is 30% copper. How much of each should be used?
Click here to see answer by josmiceli(9649)

Question 644804: how many liters of a 15% solution of alcohol should be added to a 30 liters of a 50% solution to produce a 40% solution
Click here to see answer by richwmiller(9135)

Question 644926: the rhine river is 160 km shorter than the st. lawrence river. the amazon river is 800 km longer than five times the length of the rhine river. the zambezi river is twice as long as the st. lawrence river. how long id the amazon if it is 1440 km longer than the sum of the other three rivers?
Click here to see answer by stanbon(57219)

Question 645436: how many gallons of gasoline do cars use each year in the united states?

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Question 645445: How many gallons of 20% alcohol solution must be mixed with 10 gallons of a 50% alcohol solution to obtain a 30% alcohol solution?
Click here to see answer by sachi(392)

Question 645457: A drink is made from 80% water and 20% juice mix. If you start with 20 gallons of water, how much juice mix should be added?
Click here to see answer by sachi(392)

Question 645893: The radiator in a car is filled with a solution of 60% antifreeze amd 40% water. The manufacturer of the antifreeze suggests that. for summer driving, optimal cooling of the engine is obtained with only 40% antifreeze. If the capacity of the radiator is 3.6 L, how much coolant should be drained and replaced with water to reduce the antifreeze concentration to the recommended level?
Click here to see answer by lwsshak3(6460)

Question 646081: How much pure water must be mixed with 10 liters of a 25% acid solution to reduce it to a 10% acid solution?
Click here to see answer by stanbon(57219)

Question 646291: how much water(solution) must be added to 50 g of salt to prepare a 20% by mass solution?
Click here to see answer by ankor@dixie-net.com(15624)

Question 646331: Please help me solve for x in the following equation: 1/4x + 1/6 = 1/3(x-4) I do know that x= 18 but I am unaware of how to receive that answer.
Click here to see answer by ankor@dixie-net.com(15624)

Question 646945: I am a number between 16 and 30. The product of my two prime factors is 6. I have an even number of factors. What number am I?
Click here to see answer by MathLover1(6614)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920