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Questions (1,128)

In a gaseous mixture of CH4 and C2H6, there are twice as many molecules of CH4 as C2H6. The partial pressure of CH4 is 40 mmHg.
1. 2 answers
2. 985 views
To compress a sample of gas from 2.5 litres at 1.8 atm pressure to a volume of 1.5 litres, what should the value of the pressure
1. 1 answer
2. 832 views
Give the completely balanced equation stoichiometry for the following unbalanced equation: a Cu + b NO3¯ + c H+ → d Cu2+ + e
1. 1 answer
2. 422 views
Give the half-equations for the reaction between aluminium metal and liquid bromine (Br2):
1. 1 answer
2. 726 views
Balance the following in basic solution: Al(s) + CrO42¯(aq) → Al(OH)3(s) + Cr(OH)4¯(aq)Can someone please help me do this. I
1. 1 answer
2. 1,214 views
An aqueous solution labelled 35.0% w/w HClO4 has a density of 1.251 g cm¯3. What is the molarity of the solution?My first
1. 3 answers
2. 1,917 views
MnO4¯ + 8H^+ +5Fe^2+ → Mn^2+ + 4H2O + 5Fe^3+Which ones underwent oxidisation and reduction. My answer is Mn and O went
1. 2 answers
2. 1,447 views
If a solution is made by dissolving 1 g NaCl in sufficient water to make 10 mL of solution, the composition of the solution is
1. 5 answers
2. 588 views
If a solution is made by dissolving 1g of NaCl in sufficient water to make 10g of solution, the composition of the solution is
1. 2 answers
2. 486 views
How much CaCl2.6H2O and water must be weighed out to make 100 g of a solution that is 5% CaCl2 by mass?Thanks to anyone who
1. 2 answers
2. 1,005 views
What is the %w/w of a 500 mL solution of HCl that has a density of 1.169 g/mL and was made using 386 g of water?I'm having a lot
1. 2 answers
2. 747 views
What mass (g) of Na2CO3 would be needed to react with 0.250 moles of HCI according to the equationNa2CO3 + 2HCI ---> 2NaCI + CO2
1. 2 answers
2. 467 views
Sodium carbonate can be made to react with carbon in the presence of nitrogen gas to produce sodium cyanide and carbon monoxide.
1. 2 answers
2. 1,472 views
Step 1: Carbon is burned in a limited supply of oxygen to form carbon monoxide. Step 2: The carbon monoxide formed in Step 1 is
1. 3 answers
2. 849 views
How many grams of H are in 1 mole of methane?Really having trouble with this and any help would be really appreciated
1. 1 answer
2. 347 views
A grasshopper leaps into the air from the edge of a cliff at a 47 degree angle. He reaches a maximum height 6.49 cm above the
1. 2 answers
2. 767 views
What concentration of Ag+ is in equilibrium with 3.0×10−6 M Co(CN)3−6 and Ag3Co(CN)6(s)?
1. 1 answer
2. 447 views
A Metal sphere A has a charge of +6 units and an identicalmetal sphere, B, has a charge of -4 units. If the spheres are brought
1. 1 answer
2. 1,677 views
Allegiant Airlines charges a mean base fare of $89. In addition, the airline charges for making a reservation on its website,
1. 1 answer
2. 1,270 views
Why were slaves in hind the land in the Southern colonies?
1. 1 answer
2. 466 views
Find k such that f(x) = x^4-kx^3+kx^2+1 has the factor x+2
1. 2 answers
2. 1,454 views
Why was capturing Quebec so important to the British during the French and Indian war
1. 1 answer
2. 842 views
A ball is thrown horizontally from the top of a building.The ball is thrown with a horizontal speed of 8.2 ms^-1. The side of
1. 2 answers
2. 3,034 views
What is meant by vertical component of velocity?
1. 1 answer
2. 465 views
How to find time if the body acceleration , mass and tension with which it is pulled given?
1. 1 answer
2. 332 views
How to find tension if period of constant velocity is given?
1. 1 answer
2. 387 views
I have a question of velocity-time graph in which a girl throws ball from the top of cliff.The ball has mass of 250 g. How to
1. 2 answers
2. 486 views
What is meant by resistive force?How to find the total resistive force in velocity time graph at certain time if weight of body
1. 1 answer
2. 566 views
The velocity of a particle is given by v=2x+1 cms^-1. If the particle is initially at the origin, find what the displacement
1. 3 answers
2. 506 views
Why some things we learn about in school won’t help us in real life.Why is this true? Why do teachers do this?
1. 5 answers
2. 440 views
Which of the following would most likely be in support of the NAFTA Agreement?A. a small, one-store business owner in Mexico B.
1. 3 answers
2. 2,774 views
Jaline can purchase tile at a store for $0.99 per tile and rent a tile saw for $24. At another store, she can borrow the tile
1. 2 answers
2. 1,033 views
A manufacturer uses a mold to make a part in the shape of a triangular prism. The dimensions of the part are shown below.10.77mm
1. 4 answers
2. 2,099 views
In what aspects of Japanese culture would you find influence of Chinese culture? Select all that apply.A. gardening B. currency
1. 3 answers
2. 1,341 views
How did Ming emperors try to erase Mongol influence on China? Select all that apply.A. They restored the civil service system.
1. 12 answers
2. 7,281 views
What is the product of (2x^3) and (4x^4)
1. 1 answer
2. 442 views
Suppose two dice(one red, one green) are rolled. Consider the following events, A: the red die shows 1; B: the numbers add to 3;
1. 1 answer
2. 1,276 views
Suppose two dice(one red, one green) are rolled. Consider the following events, A: the red die shows 3; B: the numbers add up to
1. 3 answers
2. 1,087 views
Granite last a long time when it is used for building in areas we are a repeat of freezing and thawing it is in common be the
1. 1 answer
2. 765 views
How are seamounts like the Rockies a bath or forms of mountain be both are made from the same kind of rock see both are
1. 5 answers
2. 1,182 views
What is 2 * 2+ 2?
1. 1 answer
2. 466 views
If a car accelerates at a constant rate of -5.60m/s^2 while braking, the velocity changes from +12.5m/s to +3.30m/s.a) determine
1. 1 answer
2. 515 views
1. A car travels 80 mi at a speed of 55mi/h. It encounters traffic and only travels at a speed of 15mi/h for a distance of 5mi.2
1. 0 answers
2. 651 views
1. A car travels 80 mi at a speed of 55mi/h. It encounters traffic and only travels at a speed of 15mi/h for a distance of 5mi.2
1. 0 answers
2. 676 views
Which of the following are the top two job expectations of people who career planHours** Benefits Type of work** coworkers
1. 35 answers
2. 15,886 views
Write and expression to represent the area of a trapezoid, which can be found by multiplying the height of the trapezoid by half
1. 1 answer
2. 3,506 views
Prove that tan4x=4tanx(1-tan²x)/1-6tan²x+tan⁴x.
1. 1 answer
2. 945 views
Which of the following is true about the single-celled paramecium?A. It is an example of a higher form of animal B. It has life
1. 2 answers
2. 771 views
If 2/y+2 = -3/y-3, then what is the value of y?A. -3 B. -2 C. 0 D. 2
1. 1 answer
2. 393 views
What is the endocrine system for.
1. 1 answer
2. 500 views
Fiona is repairing the wiring on a radio broadcast tower. She is in the basket of the repair truck 40m from the tower. if she
1. 3 answers
2. 1,305 views
Out of 25 students 3 were absent. What percent of the studentsWere absent Were present
1. 1 answer
2. 922 views
1. A concave spherical mirror has a radius of curvature of 29.4 cm. The object distance is 5.7 cm . Find the magnitude of the
1. 1 answer
2. 986 views
plane’s sound detector perceives the horn’s sound, the plane has traveled a distance equal to one-half its altitude above
1. 2 answers
2. 612 views
The distance between two successive crests of a certain transverse wave is 1.10 m. 10 crests pass a given point along the
1. 1 answer
2. 719 views
In Young's experiment a mixture of orange light (611 nm) and blue light (471 nm) shines on the double slit. The centers of the
1. 0 answers
2. 834 views
The pupil of an eagle’s eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. From a distance of 182 m, the
1. 0 answers
2. 1,034 views
A 2.60-kg block is attached to a horizontal spring that has a spring constant of 214 N/m. At the instant when the displacement
1. 1 answer
2. 637 views
1) What unit is speed measured in?2) Why is it important to include units when describing motion? I've read this entire lesson.
1. 1 answer
2. 577 views
How is log(base(x))x^m-1=1My Answer Key says m-1+1=0 but I don't understand that solution
1. 1 answer
2. 510 views
The goal of this project is to model the longitudinal motion of a Segway and design a PID controller for it. The model must
1. 1 answer
2. 532 views
solve the equation t/4=20
1. 1 answer
2. 428 views
Elliot has twice as many trading cards as Sam. Elliot has 20 trading cards. write and equation and use it to determine the
1. 6 answers
2. 737 views
Find the unit rate for a sponge cake that weighs 25 ounces and has 2750 calories.A. 0.009 calories per ounce B. 110 calories per
1. 2 answers
2. 680 views
50 is what percent of 13?Thanks
1. 3 answers
2. 453 views
kory is standing near a building that has a shadow that is 14 feet long. Kris is 5.5 feet tall, and the length of her shadow is
1. 7 answers
2. 702 views
Tamika’s dad bought a Mustang convertible for 12,000 dollars to celebrate his first job in 1978, which paid him 15,000 dollars
1. 2 answers
2. 849 views
Pedro earns 7.50 dollars an hour at his job at Matrix Cinemas. If he works 20 hours this week and his employer withholds a total
1. 4 answers
2. 820 views
Hwan decides to lose weight before the wrestling season begins. He weighs 148 pounds now and loses one pound per week for six
1. 3 answers
2. 581 views
Hwan decides to lose weight before the wrestling season begins. He weighs 148 pounds now and loses one pound per week for six
1. 3 answers
2. 689 views
What is the next term in the sequence 81, 27, 3, 1, 1/3...
1. 1 answer
2. 541 views
Detemine the sequence as arithmetic, geometric, both or neither. 16,8,4,2,...
1. 4 answers
2. 570 views
Which of the following body systems does the immune system rely on to provide the first line of defense against pathogens.A.
1. 9 answers
2. 2,282 views
Which proportion has cross products of 5*24 and 8*15?A. 5/8 = 15/24 B. 5/24 = 8/15 C. 8/24 = 15/5 D. 15/8 = 5/24
1. 1 answer
2. 936 views
Which ratio forms a proportion with 18/30?A. 20/35 B. 50/90 C. 36/48 D. 60/100
1. 10 answers
2. 2,312 views
Which Ratios for a proportion?A. 4/9,12/25 B. 3/7,18/42 C. 5/11,20/45 D. 5/8,15/25
1. 2 answers
2. 443 views
Which Ratios for a proportion?A. 4/9,12/25 B. 3/7,18/42 C. 5/11,20/45 D. 5/8,15/25 Which ratio forms a proportion with 18/30? A.
1. 11 answers
2. 1,796 views
Convert the map scale to unit rate. How many inches represent one mile? Show Your work. Interpret the meaning of unit rate. 3/10
1. 5 answers
2. 2,561 views
Write the ratio as a unit rate
1. 5 answers
2. 1,431 views
Write the ratio as a unit rate.8 meters in 10 seconds. A. 0.8 meter per second B. 1.125 meters per second** C. 2 meters per
1. 4 answers
2. 1,374 views
What was the 54 mile civil rights march called that was after bloody Sunday?
1. 3 answers
2. 498 views
an object is moving along the x-axis such that the position of the object in masters at time t in seconds is giving by the
1. 1 answer
2. 828 views
The cost in dollars of a class party is 59+13n, where n is the number of people attending. What is the cost for 44 people.
1. 10 answers
2. 4,762 views
d+g/h for d =35, g = 19, and h=6
1. 11 answers
2. 3,323 views
you want to buy three books that are on sale at 20% off. the original prices of the books are $2.50, $4.95, and $6.00. How much
1. 4 answers
2. 930 views
Why was northern Italy a natural birthplace for the Renaissance?
1. 9 answers
2. 1,170 views
Solve using metal math.a) 4y+3=19 b) 2+3m=17
1. 8 answers
2. 2,041 views
Solve the equation5.8 = z/2.2
1. 11 answers
2. 2,169 views
Solve the equation2.8x = -9.24
1. 3 answers
2. 1,337 views
What Value of x is a solution to the equation? x-2 = 16
1. 1 answer
2. 668 views
Write an algebraic expression for the sum of 3 Coins and c Coins
1. 48 answers
2. 11,120 views
Evaluate-5g-6 for g = -2
1. 1 answer
2. 785 views
1) -5g-6 for g = -22) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the
1. 9 answers
2. 2,057 views
1) -5g-6 for g = -22) Write an algebraic expression for the sum of 3 Coins and c Coins 3) What Value of x is a solution to the
1. 6 answers
2. 902 views
-5g - 6 for g=-2
1. 1 answer
2. 303 views
The track at Coolidge Middle School is 14 of a mile long. It takes Melissa 1 minute and 40 seconds to run around the track.How
1. 2 answers
2. 698 views
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest
1. 1 answer
2. 1,215 views
First Inc. is facing a liquidity problem and needs to issue a perpetual bond that is callable only at the end of year 2. The
1. 0 answers
2. 825 views
The values from a stem-and-leaf plot are:27,27,29,33,38,44,44,44,46,50,58,in numerical order.Please explain how to find the
1. 0 answers
2. 486 views
The following stem-and-leaf plot values shows the average monthly sales commissions (in hundreds of dollars)for a major
1. 1 answer
2. 603 views

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