04/28/21

Potassium Chlorate is heated in a test tube producing potassium chloride and oxygen gas. How many moles of oxygen gas would be generated from 3.85 grams of potassium chlorite?

Balanced Equation: 2 KClO3 (s) ->2 KCl (s) + O2 (g)
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04/28/21

What mass of oxygen gas is consumed in a reaction that produces 2.35 mol SO2?
2 H2S + 3 O2 -> 2 SO2 + H2O
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04/28/21

How many moles of oxygen react with hydrogen to produce 18.5 mol of water
Balenced equation: 2 H2O + O2 -> 2 H2O
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04/27/21

Starting with 5.0 g of C3H8, how many grams of water will be produced? C3H8 + O2 CO2 + H2O
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04/27/21

How many liters of hydrogen gas at STP can be generated from the reaction of excess hydrogen chloride (aka. hydrochloric acid) with 54.5 g of aluminum?
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04/27/21

If the pressure of a 2.3 mole sample of gas is initially 1.5 atm, the volume is 1.0 L and the temperature is 25ºC
what would the new volume be if 1.1 moles are added and the pressure is changed to 6.0 atm and 100.0ºC?
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04/27/21

The local atmospheric pressure is 392 mm of Hg. What is the pressure in kpa?
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04/27/21

Find the daily total revenue realized from the sale of 150 units of the toaster oven.
Marginal Revenue The management of Ditton Industries has determined that the daily marginal revenue function associated with selling x units of their deluxe toaster ovens is given by the following,... more
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04/27/21

Rydberg formula question
Using the Rydberg formula, find the wavelength of the line in the Balmer series of the hydrogen spectrum for m = 3. The value of Rydberg constant is 1.097 × 107 m–1 and n = 2 for the Balmer series.
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04/26/21

The chemical formula of yellowcake is U3O8. How many uranium atoms are present in 74.3 mg of yellowcake? (Avogadro's number is N0 = 6.022e+23)
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04/26/21

Need help ASAP with chem work
Balance: CaC2+H2O—>Ca(OH)2+C2H2if there is 40.0g of calcium carbide(CaC2), what mass of calcium hydroxide(Ca(OH2) can be formed
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04/22/21

I need help with this question
5. An object of height 5cm is placed at a distance 5cm in front of a bi-concave lens of focal length 10 cm. a. Draw the ray diagram to locate the image formed by the lens. b. Use the lens equation... more
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04/22/21

Calculus Question

The rate of growth, in dollars per year, of the net worth, f(t), of a company is given by f′(t)=2750−10t^2, where t is measured in years since 1989. How does the net worth of the company change... more
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04/22/21

A 0.300 kg mass is attached to a 26.6 N/m spring. It is pulled 0.120 m and released. How much Potential Energy does it have when it is 0.0600 m from equilibrium?
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04/22/21

How many moles of O2 are needed to make 71 moles of diphosphorus pentoxide?
The equation is: 4P+5O2=2P2O5
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04/22/21

Calculate the root mean square velocity of the following gases at 25°C.
Calculate the root mean square velocity of the following gases at 25°C. a. He b. Ar
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04/22/21

Calculating pressure in atmospheres of a gas??
A 2.00 liter volume of gas has a temperature of -20°C and a pressure of .125 atmospheres. Calculate the pressure, in atmospheres, of the gas at 4.50 Liters and 57°C.
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04/22/21

Update/Remove my review for a tutor
Hello Wyzant team, please let me know how I can update/remove a review for a tutor
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04/22/21

Two protons, each having a charge of 1.60 × 10^–19 C, are 2.0 × 10^–5 m apart. What is the electrical potential energy between the two charges?
Two protons, each having a charge of 1.60 × 10^–19 C, are 2.0 × 10^–5 m apart. What is the electrical potential energy between the two charges?
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04/22/21

A gas occupies 1.84 L at a pressure of 3.67 atm. If the gas expands to 4.22 L what is the final pressure?
a. 3.67 atmb. 7.7 atmc. 1.6 atmd. 1.99 atme. 2.1 atm
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04/22/21

In the above equation how many moles of water can be made when 107 grams of HNO3 are consumed?
S   +   6 HNO3  -->  H2SO4  +  6 NO2  +   2 H2OIn the above equation, how many moles of water can be made when 107 grams of HNO3 are consumed?Round your answer to the nearest tenth. If your... more
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04/22/21

Slaked lime (Ca(OH)2) is formed from quicklime (CaO) by the addition of water: CaO(s) + H2O(ℓ) → Ca(OH)2(s). What mass of slaked lime can be produced from a mixture of 20.7 g of CaO and 11.6 g of H2O?
Slaked lime (Ca(OH)2) is formed from quicklime (CaO) by the addition of water: CaO(s) + H2O(ℓ) → Ca(OH)2(s).What mass of slaked lime can be produced from a mixture of 20.7 g of CaO and 11.6 g of... more
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04/19/21

A car starts from rest, then accelerates at 1.20 m/s² for 7.00 s. It hits the brakes, slowing to a stop at a rate of -4.25 m/s². What is the total distance travelled?
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04/19/21

Given the following equation
 Given the following equation:  4Na(s) + O2(g ) → 2Na2O(s)    How many L of O2 gas at STP, are needed to react with 44.0 g of Na? 
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04/19/21

Find the mass of ammonia (NH3) produced when 5.00 g of hydrogen gas reacts with an excess of nitrogen gas. N2(g) +3H2(g) = 2NH3(g)
Find the mass of ammonia (NH3) produced when 5.00 g of hydrogen gas reacts with an excess of nitrogen gas. N2(g) +3H2(g) = 2NH3(g)
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