04/30/21

is it e ???????????
How many moles of oxygen are required for the complete reaction of 23.6 g of ethene to form carbon dioxide and water? a. 2.52 mol b. 1.68 mol c. None of these d. 3.37 mol e. 0.421 mol
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04/30/21

A car's airbag needs to be filled with 140 liters of nitrogen gas. Using 2NaN3 → 2Na+3N2 , determine how many grams of sodium azide (NaN3) will be required to produce the 140 liters of nitrogen gas.

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04/30/21

Need Help.............
Consider the following unbalanced equation: If 2.45 g of ethanol reacts with 10.7 g of oxygen, how many moles of water are produced? a. 0.334 mol b. 0.160 mol c. 0.0532 mol d. 0.0177 mol e. 0.669 mol
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04/30/21

Need Help.............
The equation can be interpreted as follows: 1 mol of N2 reacts with 3 mol of H2 to form 2 mol of NH3. Is this statement true or false? True False
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04/30/21

General Chemistry 1
A chemist carefully measures the amount of heat needed to raise the temperature of a 252.0mg sample of C2H2Cl2 from −3.2°C to 15.9°C. The experiment shows that 5.31J of heat are needed. What can... more
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04/29/21

What is the molarity of iron nitrate, made from 10ml of a 1.00m solution, and the diluted by adding 90ml water

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04/29/21

General Chemistry 1
If 6.00 L of water vapor at 50.2 degrees celcius and 0.121 atm reacts with excess iron, how many grams of iron(III) oxide will be produced?2Fe (s) + 3H2O (g) → Fe2O3 (s) + 3H2 (g)Answer: Mass= ______g more
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04/29/21

General Chemistry 1
The combustion of octane, proceeds according to the reaction shown.2C8H18 (I) + 25O2 (g) →  16CO2 (g) + 18H2O (I)If 346 mol of octane combusts, what volume of carbon dioxide is produced at  10... more
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04/28/21

Determining dimensions of a rectangle
A rectangular section of a field is to be fenced. One side is bordered by a creek so only three sides will be fenced, the area for this section is 60 m2. Determine the dimensions of the section... more
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04/28/21

Geometery question
A kitchen which is 6 m by 5 m is to be renovated with tiles that are 18 ft2. Determine how many tiles are needed to renovate the kitchen and how much it would cost if each tile cost $9 per... more
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04/28/21

A gas has a pressure of 1.5 atm at a temperature of 30 degrees C. If the gas is cooled to 10 degrees C, what is the new pressure?
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04/28/21

1. A local bakery charges $2.75 per cupcake. Which equation best represents y, the total cost of x number of cupcakes
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04/28/21

How many molecules of oxygen gas can be produced from 250. gram of KO2?
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04/28/21

If 32.0 g of NaOH is added to 0.700 L of 1.00 M Co(NO₃)₂, how many grams of Co(OH)₂ will be formed in the following precipitation reaction?
2 NaOH(aq) + Co(NO₃)₂(aq) → Co(OH)₂ (s) + 2 NaNO₃(aq)
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04/28/21

area from volume
How do you distinguish the area from volume?
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04/27/21

Find the value of x given the surface area

SA= 432 units ^2 6 _______x/ /————. | 12| |. || | /|______|/It’s a rectangular prism
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04/27/21

The graph of y = f '(x), the derivative of f(x), is shown below. List the intervals where the graph of f is increasing.
The graph of y = f '(x), the derivative of f(x), is shown below. List the intervals where the graph of f is increasing. A)(-4, -2) U (2, 4)B)(-2, 2)C)(-4, 0)D)(0, 4)
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04/27/21

The velocity of a particle moving along the x-axis
 The velocity of a particle moving along the x-axis is v(t) = t2 + 2t + 1, with t measured in minutes and v(t) measured in feet per minute. To the nearest foot find the total distance travelled by... more
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04/27/21

(is this correct)
At 25°C, aqueous solutions with a pH of 6 have a hydroxide ion concentration, [OH-], of  1 M  1 x 10-6 M  1 x 10-8 M  1 x 10-14 M (is this correct)
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04/27/21

What pressure in atm will be exerted by 25 g of CO2 at a temperature of 25ºC and a volume of 500. mL?
Show all work and units, make sure to use significant figures!
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04/27/21

Which equation best represents the area of a rectangle Width:x and Length:x+2 my thought process in description
well Area=Lw so x(x+2) which would be x2 +2x? i think i dont know the answer choices are: 2x+2 x(x+2) x2+4x x2+(x+2)2
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04/27/21

Which of the following accounts for the observation that the pH of pure water at 37°C is 6.8?
Which of the following accounts for the observation that the pH of pure water at 37°C is 6.8? At 37°C water is naturally acidic. At 37°C water has a lower density than it does at 25°C; therefore,... more
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04/27/21

slope = 1 y−intercept = 5 Which fits?
show me how to find this answer: y=x+5
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04/26/21

Help please I hate chem
In the synthesis of water from its elements, what is the total number of grams of oxygen gas needed to produce 54 grams of water?
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04/26/21

Mole chemical calculation

When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced 2Al(s)+6HCl(aq) 2AlCl 3 (aq)+3H 2 (g) If you began this reaction with 5.50mol of aluminum, how many moles of... more
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