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A student heats 4.00 g of a blue compound, which reacts completely to produce 2.56 g of a white compound and an unknown amount of colorless gas. What is the mass of the gas? Answer?_________ Work area: Reactant (s) = Product (s)

15 years ago

: A 50kg wooden crate rests on a horizontal concrete floor. The coefficient of friction is u=0.7. What is the magnitude of the frictional force?

15 years ago

What is 2/5 of 6?

15 years ago

About 3/4 of the track team are girls. About 3/4 of these girls are in 8 th grade. What fraction of th e students are grade 8 girls? 1/3?

14 years ago

A wave of amplitude 0.37 m interferes with a second wave of amplitude 0.18 m is traveling in the same direction. What is the largest resultant amplitude that can occur?

14 years ago

You have been retained to analyze how many check-in agents should be used at a check-in counter for a large hotel. During normal business hours, customers arrive at a rate of about 24 per hour, and it takes about 7 minutes to complete the check-in process...

14 years ago

Nubia was a kingdom to the south of egypt true or false

13 years ago

Consider the following equilibrium reaction: NaHCO3(s) Na2CO3(s) + H2O(g) + CO2(g) When 100 g of sodium hydrogen carbonate are added to a reaction vessel, the temperature is increased to 200°C, and the system comes to equilibrium. What happens to the part...

13 years ago

A container is charged with hydrogen, nitrogen, and ammonia gases at 120°C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature? 3H2(g) + N2(g) 2 NH3(g)

13 years ago

Let's explore the efficiency of chloride ion precipitation in seperating Ag^+ from Pb^2+ in a solution. Suppose that [Pb^2+]= 0.045 mol/L and [Ag^+]= 0.084 mol/L. Calculate the chloride ion concentraion required to just start precipitation of Pb^2+ ion an...

13 years ago

What concentration of chloride ion is required to precipitate 99.9% of the lead ion from a solution with [Pb^2+]= 0.045 mol/L ?

13 years ago

A solution containing Pb2+ and a solution containing IO3- are poured together and quickly mixed. After mixing, the solution contains 0.0030 M Pb2+ and 0.040 M IO3-. Immediately Pb(IO3)2(s), which has Ksp=2.510-13, begins to precipitate. Calculate the free...

13 years ago

If 29.0 mL of 0.10 M Ba(NO3)2 are added to 76.0 mL of 0.21 M Na2CO3, will BaCO3 precipitate? Calculate Q

13 years ago

use the Ksp of SnS2= 1.0X10^-70 and calculate the pH of a hydrogen sulfide solution needed to precipitate 99.99% of the tin(IV) ion assuming [Sn^4+]=0.05M and that [H2S]=0.10M.

13 years ago

The solubility products of AgBr and Ag3PO4 are 5.0 10-13 and 1.8 10-18, respectively. If Ag+ is added (without changing the volume) to 1.00 L of a solution containing 0.31 mol Br ‾ and 0.31 mol PO43-, calculate the molarity of Ag+ ions required to initiat...

13 years ago

Calculate the pH range required to separate 99.99% of Cr3+ from Zn2+ by precipitation of Cr(OH)3(s) in a solution that is initially 0.034 M in both Cr3+ and Zn2+. Use the Ksp values from Table 16.2 of Chang and calculate the pH to the nearest 0.01 pH unit...

13 years ago

Both Fe2+ and Cd2+ are precipitated by sulfide. However, they can be quantitatively separated through pH adjustment. You are given a solution containing 0.086 M Fe2+ and 0.062 M Cd2+. Calculate the [H+] range for a saturated H2S solution (ie, [H2S]=0.10 M...

13 years ago

Vector A has magnitude 37 units and direction, counterclockwise from east, of 12.9 degrees. What is the value of its x component to 1 decimal place?

13 years ago

What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?

12 years ago

You are planning an experiment that requires 0.0610 mol of nitrogen monoxide gas (NO). What volume would you need at STP? Answer in units of L

12 years ago

A sports car moving at constant speed travels 150 meters in 5.4 seconds , then brakes and comes to a stop in 3.9 seconds What is the magnitude of its acceleration in ? What is the magnitude of its acceleration in g's (g= 9.80 m/s^2 )?

12 years ago

How would I solve equations with variables on both sides? Please help!

12 years ago

A solution is made by dissolving 0.624 mol of nonelectrolyte solute in 795 g of benzene. Calculate the freezing point and boiling point of the solution. Tf=_ˆC Tb=_ˆC

12 years ago

Come up with a thesis statement which could be supported by 3 points using: humans and greed.

11 years ago

The length of a rectangular board is 10 cm longer than its width. The width of the board is 26 cm. the board is cut into 9 equal pieces. What is the area of each piece? What are the possible dimensions of each piece?

11 years ago

Romeo is chucking pebbles gently up to Juliet's window and he wants the pebbles to hit the window with only a horizontal component of velocity (the least possible speed). He is standing at the edge of a rose garden at H = 4.62 m below her window and at D...

10 years ago

What is the y-component of a vector in the x-y plane whose magnitude is 87.8 and whose x-component is 64.9?

10 years ago

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air befo...

10 years ago

At what minimum speed must a roller coaster be traveling when upside down at the top of a circle so that the passengers will not fall out? Assume a radius of curvature of 8.47 m. (in m/s)

10 years ago

How many revolutions per minute would a 15.6 m diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point? Do not enter unit.

10 years ago

A 18.6 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 202 N and breaks as the elevator accelerates. What was the elevator's minimum acceleration? (in m/s^2)

10 years ago

19>-n/5+9

10 years ago

After Victor recovers from the first of the several emotional and physical breakdowns, he is feeling much better and enjoying the fine spring weather in Ingolstadt. However, he receives a letter from Geneva that A. tells him that Elizabeth has decided to...

10 years ago

Company is planning to buy a machinery at a cost of $20 million. This machine will be used for 10 years. The machine will bring additional revenue as follows: $10 million for first 6 years and $7 million for the last 4 years Expenses = 60% of revenue for...

10 years ago

Find constants a and b in the function ax^b/ln(x) such that f(1/5)=1 and there is a local min at x=1/5

9 years ago

-4 - x = -5

9 years ago

A motor takes 5 s to go from 30 rad/s to 130 rad/s at constant angular acceleration. The total angle through which its shaft turns during this time is... A. 400 rad B. 320 rad C. 640 rad D. 800 rad E. 1600 rad F. None of the above

8 years ago

(a) If your relaxed eye has a refractive power of 56.0 D, and your lens-to-retina distance is 2.35 cm, determine if you are nearsighted or farsighted. (b) If you are nearsighted, determine your far point. If you are farsighted, determine your near point.

7 years ago

When do skydivers use decimals

6 years ago

Solving Quadratic Equations by Taking Square RootsIa I am stuck on these 2, please help. 7x^2 - 4 = 3 8v^2 - 7 = 713

5 years ago

based on the incidence of petal alcohol syndrome in various ethnic groups

3 years ago

The Nubians worshipped only one god

13 years ago

this is garbage

13 years ago

well that's the ksp they gave in the question

13 years ago

i figured it out but how do i get the Low end and High end?

13 years ago

what are the 2 lengths on top and bottom of plot 1, and what is the length on plot 3. with the following info I can answer

12 years ago

First you need to find the limited reactant. You do this by dividing the 2.0 g of NaSO4 by it's molar mass as well as the 2.0 g of Calcium Sulfate dihyrdate (CaCl2 + 2H20) You'll find that the Calcium sulfate is the limited reactant. From there you Take t...

11 years ago

Hypercritical

10 years ago

No its not, the answer is C: Haploid, and are made when haploid spores undergo mitosis.

9 years ago

Exactly thank you. @Ms.Sue where is the help you are supposedly so glad to help us with?

8 years ago

What are the answers

6 years ago

M x g = 16 So wouldn't g = gravity which is 9.8 and mass equal 2 Thus, 2 × 9.8 = 16?

3 years ago