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mathew
Questions and answers by visitors named
mathew
Questions (90)
A beaker contain 300.ml of a 0,20 M Pb(NO3) solution. If 200 ml of 0,20M solution og MgCl2 is added to the beaker, What will be
3 answers
779 views
A football is kicked from the ground with a speed of 23m/s at an angle of 42 degrees above the horizontal
a) how long is the
5 answers
2,560 views
Jennifer is a 29-year-old administrative assistant married to Antonio, an Italian engineer, whom Jennifer met four years earlier
3 answers
755 views
how old are these rocks please granite sandstone limestone mudstone and conglomerate many thanks.
1 answer
416 views
what is the A.S.A cuz i need to find out what it/they do
1 answer
432 views
unscamble the letter to find the name of a mall
trrlnematitanaaon
3 answers
564 views
sin^-1(sin 7pi/6)
1 answer
309 views
x^4-1/x^3=0
1 answer
255 views
oxidation state of nitrogen in n2h4
4 answers
6,497 views
oxidation state of nitrogen. no2-
1 answer
434 views
use exponential notation to express the number 480 in 3 significant figures and 4 significant figures
4 answers
3,107 views
the most common english unit of mass is the pound avoirdupois. what is one troy pound in kilograms and in pounds?
2 answers
578 views
in right triangle PQR,Q=90DEGREE,PQ=4 AND PR=7 WHAT IS ANGLE R TO THE NEARST TENTH OF A DEGREE
2 answers
1,045 views
So I have to write an argumentative essay on Canadians peacekeeping in foreign countries (Cyprus, Rwanda, Somalia, Bosnia,
7 answers
579 views
can you write an equation for the line with slope 2/3 and y-intercept 5?
1 answer
334 views
Julia and Bianca both leave the college at the same time, but in opposite directions. If Bianca travels 9 mph faster than Julia
2 answers
1,151 views
what volume of0.100 M NaPO4 is required to precipitate all the lead(II) ions from 150ml of 0.254 M Pb(NO3)2
3 answers
502 views
what volume 0,100M of Na2PO4 is required to precipatate all the lead(II) ions from 150 ml of 0.250M Pb(NO3)2
1 answer
460 views
what mass of barium sulfate can be produced when 100 ml 0.100 M of solution of barium chloride is mixed with 100.0 ml of a 0.100
4 answers
4,510 views
what mass of silver chloride can be prepared by the reaction of 100 ml 0,20 M of silver nitrate with 100,0 ml of 0.15 M calcium
2 answers
1,184 views
Is momentum conserved when 2 carts having the same mass & the same speed collide, stick together and stop? what about the
1 answer
460 views
a student mixes 4 reagents together thinking that the solution will neutralize each other . The solution is mixed together are
3 answers
706 views
30 ml of sample of unknown strong base is neutralized after the addition of 12 ml of a 0.150 M HNO3 solution if the unknown base
5 answers
3,451 views
Balance following oxidation reduction reactions using oxidation states method?
a) Cl2(g) + Al(s) --> Al3+(aq) + Cl- b.) O2(g) +
4 answers
4,142 views
Two ice skaters stand facing each other at rest on a frozen pond. They push off against one another and the 48-kg skater
4 answers
9,322 views
A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.540 m/s. The
1 answer
826 views
A 96.5 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 45.5 m/s. If both are initially at rest and if
1 answer
710 views
10 ml sample of vinegar an aqueous solution 0f acetic acid( HC2H3O2) is titrated with 0.5062 M and 16.58 ml is required to reach
3 answers
2,998 views
A 30 ml sample of unknown strong base is neutralized after the addition of 12 ml of a 0.150 M HNO3 solution if the unknown base
2 answers
794 views
One hazard of space travel is debris left by previous missions. There are several thousand masses large enough to detect by
4 answers
2,046 views
A 0.450 kg hammer is moving horizontally at 6.00 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a
5 answers
4,455 views
When a hammer strikes a nail, it is compressed along its length. Suppose that a steel nail 10.00 cm long and 3.00 mm in diameter
1 answer
1,165 views
A student mixes 4 reagents together thinking that the solution will neutralize each other . The solutions are mixed together are
2 answers
778 views
Drow a velocity time graph graph for the ball starting 1.0 s before the collision to 1.0s after the collision
4 answers
464 views
Following oxidation-reduction reaction by using the oxidation state method
a) O2+H2O+Pb=Pb(OH)2
2 answers
556 views
n the spectroscopic analysis of many substances, a series of standard solutions of known concentration are measured to generate
1 answer
917 views
The x component of a displacement vector
r is −149 m, while its y component is −174 m. (a) Find the magnitude of r. (b) Find
2 answers
1,015 views
22) A golf ball moving forward with 1 unit of momentum strikes and bounces backward off a heavy bowling ball that is initially
1 answer
1,053 views
An analytical procedure requires a solution of chloride ions ,How many grams of CaCl2 must be disolved to make2.15L of 0.0520 M
5 answers
1,931 views
A student weighs out 0.568 g of KHP (molar mass = 204 g/mol) and titrates to the
equivalence point with 36.78 mL of a stock NaOH
4 answers
2,262 views
An unknown diprotic acid requires 26.66 mL of 0.117 M NaOH to completely neutralize a 0.845 g sample. what is the molar mass of
3 answers
1,735 views
1) Aqueous solutions of potassium sulfate and ammonium nitrate are
mixed together. Which statement is correct? A) Both KNO3 and
5 answers
9,249 views
A bicycle tire fitted was fitted with the air pressure of 75 psi at temperature 19 degree C riding the bike on a asphalt on a
4 answers
1,434 views
A compressed gas cylinder contains 1.00 into 1000 g argon gas . the pressure inside the cylinder is 2050 psi at a temp of 18
2 answers
715 views
A 100 L flask contains a mixture of methane and argon gasses at 25 degree C . The mass of argon present is 228 g and the mole
4 answers
3,824 views
Displacement vectors
A, B, and C add up to a total of zero. Vector A has a magnitude of 1550 m and a direction of 22.9° north of
1 answer
955 views
Displacement vectors A, B, and
C add up to a total of zero. Vector A has a magnitude of 1550 m and a direction of 22.9° north of
3 answers
1,395 views
while cruising along dark stretch of highway at a speed of 25 m/s you see that bridge ahead has been washed out. you apply the
3 answers
861 views
A jet needs to reach a takeoff speed of 75.0 m/s. If the runway is 1625 meters long, what
minimum acceleration is needed? How
2 answers
853 views
The reaction
SO2 + H2O =H2SO4 Is the last step in the commercial production of sulfuric acid . the enthalpy change for this
4 answers
3,002 views
On the moon, the acceleration due to gravity is only 1.6 m/s/s. If someone on earth can throw a baseball 24.2 m high, how high
4 answers
2,887 views
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 23.5 m/s and
1 answer
659 views
A 18.3 g piece of aluminum (which has a molar heat capacity of 24.03 J/oC mol) is heated to
82.4oC and dropped into a calorimeter
4 answers
3,107 views
Sodium vapor lamps are used in Chicago to light city streets. The light emitted (given off) by these lamps has a λ of 5.9 x
1 answer
442 views
A contestant in a winter games event pushes a 41.0 kg block of ice in the positive direction across a frozen lake as shown in
3 answers
1,579 views
The stone was thrown through a distance of 80 cm the act of throwing takes approximately 0.064 s. determine the launch velocity
1 answer
332 views
A mover has to move a heavy sofa of mass 66 kg to the second floor of the house. As he pulls on the rope tied to the sofa he
2 answers
801 views
A 75 kg person escapes from the burning building by jumping from the window 25 m above a catching net air resistance exerts a 95
1 answer
688 views
A skydiver weighing 840 N opens his parachute at the appropriate height from the ground. The air exerts a significant upward
3 answers
787 views
Calculate the acceleration of a sled that is heading down a 50° slope (one that makes an angle of 50° with the horizontal).
4 answers
4,337 views
Calculate the maximum deceleration of a car that is heading down a 14.5° slope (one that makes an angle of 14.5° with the
1 answer
996 views
A cargo plane is moving with a horizontal velocity of
vx = +230 m/s at a height of y = 840 m above level ground as shown in the
2 answers
553 views
A quarterback threw a football at 27 m/s at a certain angle above the horizontal. If it took the ball 3.3 s to reach the top of
2 answers
908 views
The curves on a race track are banked to make it easier for cars to go around the curves at high speed. Draw a free-body diagram
4 answers
3,121 views
(e) If the speed of the ball at the bottom of the circle is v, what is the expression for the centripetal force on the ball in
3 answers
1,691 views
Can the gravitational potential energy of a baseball ever be negative?
Yes No Explain without using a formula.
3 answers
961 views
How much work must be done to stop a 1070 kg car traveling at 111 km/h?
1 answer
441 views
A baseball (m = 145 g) traveling 20 m/s moves a fielder's glove backward 25 cm when the ball is caught. What was the average
1 answer
822 views
A 66-kg baseball player slides into third base. He starts his slide at a speed of 4.3 m/s and his speed is zero just as he
5 answers
9,071 views
At 500 K in the presence of a copper surface, ethanol decomposesaccording to the following equation.
C2H5OH(g) CH3CHO(g) + H2(g)
3 answers
1,960 views
Guy has to get a piano onto a 2.4 m high platform. He can use a 3.0 m long frictionless ramp or a 4.0 m long frictionless ramp.
2 answers
1,237 views
What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 n C and a = 7.00? (The positive
1 answer
398 views
A solid, uniform disk of radius 0.250 m and mass 60.4 kg rolls down a ramp of length 4.60 m that makes an angle of 18.0° with
2 answers
885 views
a) calculate the concentration of your unknown (Gatorade) using correct units Note if you did not run the Gatorade use
2 answers
559 views
Which of the following statements about electric field lines due to static charges are true? (Select all that apply.)
Electric
4 answers
6,803 views
What is the magnitude and direction of an electric field that exerts a 4.00 ✕ 10 -5 N upward force on a - 1.80 µC charge?
N/C
1 answer
660 views
An electron has an initial velocity of 2.00 ✕ 10 6 m/s in a uniform 6.00 ✕ 10 5 N/C strength electric field. The field
1 answer
945 views
Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts.
(a) What is the electric
1 answer
834 views
(a) A charged particle accelerates as it moves from location A to location B. If
V A = 170 V and V B = 210 V, what is the sign of
3 answers
1,863 views
A proton is acted on by an uniform electric field of magnitude 233 N/C pointing in the positive x direction. The particle is
1 answer
851 views
Two charges q 1 = −3.20 nC and q2 = +8.96 nC are at a distance of 1.94 µm from each other. q 1 is fixed at its location while
3 answers
1,445 views
(a) Find the electric potential difference
V B − V A due to a point charge q 1 = −2.65 nC that is 0.250 m from location A and
1 answer
761 views
How many fewer minutes would it take the driver to travel a distance of 10 miles at a speed of 65 miles per hour than at a speed
3 answers
568 views
write each fraction as a decimal and each decimal as a fraction in simplest form.
1.8/20 2.0.64 3.3/100
4 answers
985 views
if one of the zeroes of a cubic polynomial x^3+ax^2+bx+c is -1.find the product of other 2 zeroes
2 answers
701 views
4/100 of which is 0.8
2 answers
613 views
0.7 of which is 3.43
9 answers
2,480 views
If you eat 2/3 of a pizza, and are left with 12 slices, how many slices are in 1/2 of the pizza?
5 answers
5,255 views
Mrs. Herby bought some carrots. She put 2/5 of them on a platter and the rest in a plastic bag. If there were 8 carrots on the
18 answers
3,689 views
a pharmisist put 4.536 ounces of vitamines pills into bottles 0.042 ounce of vitamin pills into each bottle. how many bottels
1 answer
235 views
