03/19/21

question for chemistry

A sample of gas in a closed flexible container has a starting pressure of 112.1 kPa and volume of 5.1 L. If the temperature goes from 300.0 K to 339.5 K, what is the new pressure in kilopascals if... more
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03/19/21

FINDIND THEORETICAL YIELD OF SODIUM CARBONATE

2NaHCO3(s) --> H2O (g) + CO2(g) + Na2CO3(s)set up is thisMass NAHCO3 --> mol NaHCO3 --> mol Na2CO3 --> mass Na2CO3from there I don't know how to start, please help!
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03/19/21

Titanium (IV) oxide, TiO 2 , is used in paints. It is formed according to the following balanced reaction .
TiCl 4 + O 2 TiO 2 + 2 Cl 2 Chemistry students calculate that the amount of product formed could be 62.5 g. What is the percentage yield of Titanium () oxide if 29.5 g are formed in experimentation ? more
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03/19/21

1. How many atoms are there in 24 grams of calcium? 2. What is the mass of one mole of calcium carbonate, CaCO3? will provide Fave answer?
With Solutions Pls1. How many atoms are there in 24 grams of calcium?2. What is the mass of one mole of chalk that is made from calcium carbonate, CaCO3?3. The rating of some fuels depends on the... more
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03/18/21

please help me with the calculus homework question ASAP pleaseeeee help thank you

An inverted pyramid is being filled with water at a constant rate of 70 cubic centimeters per second. The pyramid, at the top, has the shape of a square with sides of length 5 cm, and the height is... more
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03/18/21

What does this scale read?
Ronald Ripvance has a mass of 50kg. Ronald stands on the scale in an elevator traveling upward at a constant speed of 2.5 m/s. A. What does the scale below Ronald read? (in newton’s)B. The elevator... more
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03/18/21

Stoichiometry hw help!
Answer the question based on the reaction of potassium permanganate with hydrochloric acid. 2 KMnO4 + 16 HCl → 5 Cl2 + 2 KCl + 2 MnCl2 + 8 H2O How many grams of water will be produced when 427 g... more
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03/18/21

Calculus Question!! PLEASE HELP ASAP SOS!
At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 25 knots and ship B is sailing north at 20 knots. How fast (in knots) is the distance between the ships changing... more
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03/18/21

Suppose a product's revenue function is given by R (q) = − 2q^2 + 900 q

Where R(q) is in dollars and q is units sold. Find a numeric value for the marginal revenue at 21 units.MR(21)= _$ per unitThnak you in advance
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03/18/21

Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level 𝑛=3 to the level 𝑛=1.
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03/18/21

Cant Figure this One out?
Using the following chemical equation:     P (s)   +   Cl2 (g)    →  PCl3 (l),if 35.0 grams of chlorine react with excess phosphorus metal and 42.5 grams of phosphorous trichloride are produced in... more
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03/18/21

How do I answer this question? Cant seem to figure out the answer.
For the reaction3 H2 (g)   +   N2 (g)    →   2 NH3 (g),how many grams of ammonia will be produced from 2.40 moles of hydrogen gas?
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03/18/21

A net force of 1.0 N acts on a 3.0-kg object, initially at rest, for 4.0 seconds. What is the distance the object moves during that time?
A net force of 1.0 N acts on a 3.0-kg object, initially at rest, for 4.0 seconds. What is the distance the object moves during that time?
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03/18/21

Use the following reaction: 2KClO3 -> 2KCl + 3O2
If 5.0 g of KClO3 is decomposed, how many grams of KCl are produced?
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03/18/21

Chemistry question help
The temperature of a sample of iodine gas at 74.7 kPa is changed, causing a change in volume from 130.9 L to 62.9 L. If the starting temperature was 15.6 °C, and its new pressure is now 1.3 atm,... more
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03/18/21

Use the following reaction: H2SO4 + 2NaOH -> 2H2O + Na2SO4
How many grams of water are produced if 2.0 moles of sodium sulfate are produced?
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03/18/21

A sample of O3 experiences a change in volume from 62.966 L to 16.107 L. If its new pressure is 7.6033 atm, what was its original pressure in atmospheres?
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03/18/21

A 10,000 g sample of a compound is found to contain 6.545 g of carbon, 0.545 g of hydrogen, and the remainder of the mass is contributed by oxygen. Determine its empirical formula.
Find the empirical formula please and thank you
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03/18/21

Chemistry help please

How many grams of oxygen are required to react with 38.0 g of lead(II) sulfide?How many grams of sulfur dioxide can be produced when 66.0 g of lead(II) sulfide reacts?How many grams of lead(II) are... more
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03/18/21

I need help with physics problem
A car parked on the top of a 50 m hill slips out of gear and rolls down the icy hill. How fast is it going at the bottom of the hill? Friction can be neglected
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03/18/21

Find the​ magnitude, to the nearest hundredth of a​ pound, and the direction​ angle, to the nearest tenth of a​ degree, of the resultant force.
The magnitude and direction of two forces acting on an object are 120 pounds, S58°​E, and 80 pounds, N69°​E, respectively. Find the​ magnitude, to the nearest hundredth of a​ pound, and the... more
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03/18/21

A ship leaves port and travels 40 miles at a bearing of N50°W. The ship then changes direction to a bearing of S20°W and travels another 100 miles.
Find the ships distance from home to port and find the bearing back to the home port.
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03/18/21

Exactly 11.5 mL of water at 34.0 °C is added to a hot iron skillet.

All of the water is converted into steam at 100.0°C. The mass of the pan is 1.10 kg and the molar heat capacity of iron is 25.19 J/(mol·°C). What is the temperature change of the skillet?
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03/18/21

Help me solve this problem.
A supermarket is to be designed as a rectangular building with a floor area of 12,000 square feet. The front of the building will be mostly glass and will cost $70 per running foot for the... more
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03/18/21

physics question
How much work is done on a 2.50 kg box by carrying the box to the top of a set of stairs that is 12 meters in length and goes up 6 meters in elevation?
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