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1. Find the pH at each of the following points in the titration of 50 mL of 0.3 M HF with 0.3 M NaOH. The ka value is 6.6×10-4.
1. 1 answer
2. 39 views
Find the pH at each of the following points in the titration of 50 mL of 0.3 M HF with 0.3 M NaOH. The ka value is 6.6×10−4 .
1. 1 answer
2. 40 views
The pH of an aqueous solution that is 3.00% HCl by mass and has a density of 1.015 g/mL?* 2 points 0.078 4.5 7.8 0.78
1. 1 answer
2. 72 views
A 0.750 g sample containing only KCl and NaBr was titrated with 0.1043 M AgNO3 , requiring 42.23 mL to reach the endpoint.
1. 1 answer
2. 68 views
In titrations curve of a weak acid, at the equivalence point of the solution contains only of* 1 point The conjugate acid buffer
1. 1 answer
2. 47 views
The pH of a solution when adding 25.00 mL of 0.001 M NaOH on of 50.00 mL of 0.001 M acetic acid (HOAc) at 25°C is............*
1. 1 answer
2. 41 views
Calculate the pH of a solution when adding 30.00 mL of 0.1000 M NaOH on 50.00 ml of 0.0500 M HCl with at 25°C.* 1 point 11.80
1. 1 answer
2. 47 views
The human eye is not very sensitive to color differences in a solution containing a mixture of HIn and In-, particularly when
1. 1 answer
2. 47 views
An acid/base indicator is a weak organic acid or a weak organic base whose undissociated form differs in color from its
1. 1 answer
2. 61 views
How many millimoles of solute are contained in 250 ml of a solution that contains 4.20 ppm of CuSO4?* 1 point 0.00658 mmol 10.0
1. 1 answer
2. 90 views
how many grams needs to the preparation of 1.000 L of 0.0500 M AgNO3 (169.87 g/mol) from the primary-standard-grade solid.* 1
1. 1 answer
2. 36 views
How many grams of Ba(IO3)2 ( 487g/mol) can be dissolved in 250 ml of water at 25 C? Ksp = 1.57 * 10-9* 1 point 0.089 g 0.178 g
1. 1 answer
2. 38 views
Calculate the pOH of 0.200 M aqueous NaOH at 25°C.* 1 point 6 0.699 8 13.3
1. 1 answer
2. 38 views
The role of nitric acid ( HNO3) in gravimetric analysis is:* 1 point prevent peptizing use as washing ion exchange all of
1. 1 answer
2. 39 views
A sample containing 0.2784 grams of sodium chloride (NaCl) and 0.5486 grams of magnesium chloride (MgCl2). The chloride in the
1. 1 answer
2. 70 views
Adding precipitating agent slowly and stirring increases Q and decreases S* 1 point False True
1. 1 answer
2. 33 views
When (Q -S)/S is small, the precipitate tends to be a crystalline solid .* 1 point True False
1. 1 answer
2. 42 views
The effect of a constant error becomes more serious as the size of the quantity measured decreases.* 1 point False True
1. 1 answer
2. 50 views
Describe the preparation of 500 mL of 47.5% (w/v) aqueous ethanol (C2H5OH, 46.1 g/mol) .* 1 point 2.38 10-1 g C2 H5 OH 2.3.8 g
1. 1 answer
2. 37 views
A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (329.2 g/mol) in sufficient water to give 577 mL. Calculate the molar
1. 1 answer
2. 53 views
Calculate the molar H3O+ ion concentration of a solution that has a pH of 5.31.* 1 point 4.9 × 10–5 M 4.9 × 10–4 M 9.4 ×
1. 1 answer
2. 45 views
What is the mass in milligrams of solute in 5.75 mL of 0.0819 M KNO3?* 1 point 57.6 mg KNO3 47.6 g KNO3 47.6 mg KNO3
1. 1 answer
2. 60 views
9.00 L of a solution that is 60.0 ppm in Na+, starting with solid Na2SO4* 1 point Dissolve 1.7 g Na2SO4 in enough water to give
1. 1 answer
2. 59 views
A writer of a persuasive text should address conflicting personal views and evidence by first trying to either back up their own
1. 1 answer
2. 185 views
Which equation can be used to determine the price, p, of one game?a. 45. 90p = 3 b. 3p = 45. 90 c. p/3 = 45. 90 d. p/45.90 = 3
1. 2 answers
2. 314 views
The usefulness of science
1. 2 answers
2. 261 views
Explain the usefulness of science
1. 2 answers
2. 257 views
A pond is 36 m long a duck swims 4 lengths of the pond each day how far does the duck swim in four weeks
1. 1 answer
2. 626 views
Given the measured cell potential, E cell is -0.3603 V at 25°C in the following cell, calculate the H+ concentrationPt(s)|H2(g,
1. 0 answers
2. 1,130 views
A(aq) <--> 2B(aq)Kc= 5.98 * 10^-6 at 500 K If a 2.30 M sample of A is heated to 500 K, what is the concentration of B at
1. 0 answers
2. 737 views
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is
1. 0 answers
2. 704 views
The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device
1. 0 answers
2. 666 views
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is
1. 1 answer
2. 732 views
the half-life of rhodium rh-106 is about 30 seconds. you start with 500 grams.formula: y=ab^x
1. 3 answers
2. 2,991 views
Simplify.3ab^2/4ab * 3a^2 b4a
1. 1 answer
2. 712 views
When 2-propanol was used as the developing solvent, two substances moved with the solvent front (Rf = 1) during TLC analysis on
1. 1 answer
2. 1,586 views
A solution contains I-, Br- and OH- ions. If Ag+ is added, what will the precipitate(s) be?
1. 3 answers
2. 2,255 views
Simplify each polynomial.6g + 8k - 9g + 2k
1. 49 answers
2. 7,924 views
A florist sold bouquet of red roses to 15 of the first 20 customers who came into his shop.1. What is the experimental
1. 2 answers
2. 3,739 views
A florist sold bouquet of red roses to 15 of the first 20 customers who came into his shop.1. What is the experimental
1. 1 answer
2. 743 views
3m/2/3=7 can someone help me with this question.
1. 1 answer
2. 307 views
3m/2/3=7 How can I solve this problem? I need your help
1. 2 answers
2. 991 views
Amman hikes 2 3/4 miles of nature trail in 1 hour and 15 minutes. How many miles of trail does Amman hike per hour?
1. 1 answer
2. 648 views
The variables p and q have the same numerical value but the opposite sign; that is, one is positive and the other is negative.
1. 1 answer
2. 539 views
A deep-sea exploring ship is pulling up a diver at the rate of 25 feet per minute. The diver is 200 feet below sea level. How
1. 15 answers
2. 7,001 views
An elevator is on the twentieth floor. It goes down 11 floors and then up 5 floors. What floor is the elevator on now?
1. 6 answers
2. 2,970 views
When Steve woke up. His temperature was 102 degrees Fahrenheit. Two hours later it was 3 degrees lower. What was his temperature
1. 2 answers
2. 1,732 views
What's the missing number?5+3-6-8+4-?= -9
1. 0 answers
2. 426 views
A basketball rolls to the right with a velocity of 4 meters per second. It is pushed up and accelerated up for 2 seconds with an
1. 1 answer
2. 540 views
8g of hydrogen is burnt in the presence of excess oxygen.the mass of water formed is?
1. 2 answers
2. 903 views
76 times a number minus 72 equals to -65 less than a number
1. 1 answer
2. 863 views
S is in the interior of ∠PQR, m∠PQS = 87°, and m∠SQR = 33°. Find m∠PQR.
1. 1 answer
2. 2,679 views
Which list shows the pattern you would get if you used the rule 12n?A. 12,14,16,18 B. 12,24,36,48 C. 12,13,14,15 D. 12, 22,
1. 4 answers
2. 2,948 views
Joy put 6 photos on each page of her album. When she was done , she had 2 pictures left over. She put 38 pictures in the album.
1. 4 answers
2. 2,714 views
a person who is 6 feet tall is standing 108 feet from the base of the tree, and the tree cast a 120 foot shadow . The person's
1. 3 answers
2. 1,896 views
Lily made 3 pounds of cloe slaw for a picnic .Each serving of cole slaw is 1/8 pound.How many 1/8 pounds servings of Coles slaw
1. 4 answers
2. 1,223 views
A male African elephant weighs 7 Tons. If a male African lion at the local zoo weighs 1/40 of the weight of the male African
1. 17 answers
2. 3,162 views
Eddie measured his aquarium using a small fish food box. The box has a base area of 6 inches and a height of 4 inches. Eddie
1. 12 answers
2. 1,479 views
A mail truck picks up two boxes of mail from the post office. The total weight of the boxes is 32 pounds. One box is 8 pounds
1. 5 answers
2. 1,399 views
If you divide this mystery number by 4, add 8, and multiply by 3 you get 42. What is the mystery number?
1. 1 answer
2. 1,279 views
Maurice lives 4 miles east of Drew. Chris lives 1 mile east of Maurice. Randy lives 2 miles east of Drew. Everyone lives on the
1. 1 answer
2. 505 views
Wendy is building a set for a school play. She is putting up a fence around a rectangular plot of fake grass measuring 3 feet by
1. 1 answer
2. 574 views
Wendy is building a set for a school play. she is putting up a fence around a rectangular plot of fake grass measuring 3 feet by
1. 1 answer
2. 493 views
Maurice lives 4 miles east of Drew. Chris lives 1 mile east of Maurice. Randy lives 2 miles east of Drew. Everybody lives on the
1. 1 answer
2. 550 views
What are the classification of a Emerald Rock?
1. 0 answers
2. 490 views
Polar ice is about 3/4 of the 3% of Earth's fresh water. What fraction of all of Earth's water is polar ice?
1. 3 answers
2. 540 views
How do you change 97% into a fraction?
1. 1 answer
2. 661 views
[Key: /= a fraction bar]Olga ran 5 kilometers in 37 minutes. Which could Olga use to determine m, the number of minutes she
1. 15 answers
2. 1,866 views
Find the product14.4/5 of 30 A. 24 B. 8 C.30 4/5 D.20 15. 14 * 3/5 A.42 B. 20 C. 8 2/5 D.28 3/5 16. 3/10 * 2/10 A.3/50 B. 1/10
1. 5 answers
2. 464 views
Kevin had 3/4 yd of string. He used 1/3 of it on a school project. How much string did he use?A.5/12 yd B.1/3 yd C.7/12 yd D.1/4
1. 7 answers
2. 2,651 views
Which sequence of process must occur for an atom of carbon to go from a car to a tree?A. respiration, decomposition B.
1. 3 answers
2. 846 views
A restaurant sells about 330 sandwiches each day at aprice of $6 each. For each $.25 decrease in price, 15 more sandwiches are
1. 1 answer
2. 1,070 views
Two forces are applied simultaneously to a crate sliding in a horizontal plane: 36.8 N to the right and 20.2 N to the left. What
1. 1 answer
2. 532 views
Marla and her mom cooked 21.3 liters of spaghetti sauce. They used 18 jars of the same size to can it. About how much did each
1. 1 answer
2. 549 views
Anthony leaves kingstons at 2:00 pm and drives to queensville, 160mi distant, at 45 mph. At 2:15 pm Helen leaves queensville and
1. 1 answer
2. 2,245 views
A homeowner wishes to fence in three adjoining garden plots, as shown in the figure. If each plot is to be 80 ft^2 in area, and
1. 5 answers
2. 5,262 views
Abbie paints twice as fast as Beth and three times as fast as Cathie. If it takes 60 min to paint a living room with all three
1. 1 answer
2. 1,657 views
1.50g of NaHCO3 is dissolved in 17.1g of water. Express the solubility of NaHCO3 in grams per 100g of solvent and calculate the
1. 1 answer
2. 840 views
Accounting 1 Help!1. An accountant records a transaction when cash is paid or received under which basis of accounting? cash
1. 1 answer
2. 1,861 views
4 1/3 - 21/2
1. 3 answers
2. 401 views
4 1/3 - 2 1/2 Thank you for your help
1. 1 answer
2. 429 views
3 1/10 + 14 2/5
1. 2 answers
2. 414 views
4 2/9 + 2 1/3
1. 1 answer
2. 401 views
7/12, 3/4, and 2/3 in order which one is the smallest to the greatest?
1. 2 answers
2. 496 views
Is 2/3 greater than 3/4
1. 1 answer
2. 503 views
Vicki bought an ice cream cake cut into 6 equal pieces. Vicki, Margo,and Elena each took 2 pieces of the cake home. Vicki says
1. 2 answers
2. 825 views
A greenhouse at Alice's nursery has 340 planters. Each planter holds 10 plants. Alice has 1,092 plants in the greenhouse. How
1. 1 answer
2. 564 views
1/6 of a box of paperclips are red, 5/12 of them are blue and 2/5 of the remainder are black. If there are 10 black paperclips,
1. 1 answer
2. 778 views
Javier rode his bike for a total of 41 minutes. Before lunch, he rode for 1 minute less than 5 times the number of minutes he
1. 7 answers
2. 2,662 views
Together , Tom and max have 72 football cards. Tom has 2 more than 4 times as many cards as max has. How many football cards
1. 2 answers
2. 1,349 views
the sum of 5 consecutive whole numbers is 2005. what is the sum of all the digits of these 5 numbers
1. 4 answers
2. 2,614 views
Richard's Plumbing Co. has rapidly grown to become a multi-state business, and it has recently acquired Mr. Plumber, a smaller
1. 0 answers
2. 1,007 views
Can someone please help me start this?Using Shannon’s formula, calculate the data transfer rate given the following
1. 0 answers
2. 574 views
Find all numbers x for which |x-1| + |x-2| > 1.I know the answer is that there exists no such x, but I need someone to explain
1. 2 answers
2. 403 views
Find all numbers x for which |x-1| + |x-2| > 1.I know the answer is that there exists no such x, but I need someone to explain
1. 0 answers
2. 374 views
The region bounded by y= 1/(x^2+2x+5), y=0, x=0, and x=1, is revolved about the x-axis. Find the volume of the resulting solid.
1. 1 answer
2. 506 views
How do you work5y ____ 3y+6 It is in fraction form and it just got me stuck,,,please help!!!!! :(
1. 4 answers
2. 416 views
if 25% of all students asked say they spend too much time on homework, and 12 students are selected at random, what is the
1. 1 answer
2. 595 views
How many grams of SO2 can be produced from 100g of S and excess O2
1. 2 answers
2. 2,145 views
If I have a Galvanic cell of Nickel and Gold where Nickel is (Ni->Ni^+2 + 2e-) and the oxidation of gold is (Ag^+->Ag + e-) then
1. 1 answer
2. 915 views

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