04/26/21

lab for chemistry
Objectives Prepare a supersaturated solution of salt. Observe the effect of adding a small seed crystal to the supersaturated solution. Supersaturated Lab Video Link  Double click on picture then... more
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04/26/21

chemical quantities
How many liters are in 176 grams of dinitrogen pentoxide gas at STP?
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04/26/21

According to the following reaction, how many moles of oxygen gas are necessary to form 0.293 moles carbon dioxide? benzene (C6H6) (l) + oxygen (g) carbon dioxide (g) + water (g) moles oxygen gas
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04/26/21

Help with this chemistry question please?
Choose which direction (right, left, or 'no affect') the equilibrium will shift when the following stressors (changes) are placed on the equilibrium.Given:    heat + 2 NH3 (g) <--> N2 (g) + 3... more
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04/26/21

When two He atoms undergo fusion in a star, the resulting element is:
When two He atoms undergo fusion in a star, the resulting element is:a) Hb) Lic) Bed) Hee) all of the above
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04/26/21

17.3 g of oxygen contains a. 1.04 × 1025 oxygen molecules b. 1.08 mol of oxygen molecules c. 35 amu d. none of the above e. 6.51 × 1023 oxygen atoms
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04/25/21

A 265 gal storage tank contains 88.5 kg methane ( CH4) . If the temperature reaches 42 ∘C, what is the pressure inside the tank?
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04/25/21

A certain mass of nitrogen gas occupies a volume of 2.21 L at a pressure of 1.05 atm. At what pressure will the volume of this sample be 4.59 L? Assume constant temperature and ideal behavior.
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04/25/21

Balance the redox reaction by inserting the appropriate coefficients.
H2O + Br- + Al^3+ --> Al + BrO3^- + H+
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04/25/21

Two white powders are mixed in a flask. The bottom of the flask feels cold. This is an example of what kind of reaction?
Two white powders are mixed in a flask. The bottom of the flask feels cold. This is an example of what kind of reaction?exothermicisothermicnucleothermicendothermic
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04/25/21

Find the maximized rent in $.

The manager of a 100-unit apartment complex knows from experience that all units will be occupied if the rent is $600 per month. A market survey suggests that, on average, one additional unit will... more
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04/25/21

Sketch the graph of f and use your sketch to find the absolute and local maximum and minimum values of f.
Sketch the graph of f and use your sketch to find the absolute and local maximum and minimum values of f. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) ... more
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04/25/21

A sealed container holding 0.0255 L of an ideal gas at 0.983 atm and 67 ∘C is placed into a refrigerator and cooled to 45 ∘C with no change in volume. Calculate the final pressure of the gas.
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04/24/21

Four numbers have a sum of 165. The 1st number is 5 more than quadruple the 3rd. The 2nd number is 7 less than triple the 3rd. The 4th number is 14 more than half the 3rd. Find all four numbers.
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04/23/21

Hero’s journey / the call to adventure

For this creative task, i’m supposed to create a hero I think 2021 needs.• An ordinary world - She is a kinda hearted ordinary girl who goes to high school and works everyday after school. Tired of... more
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04/23/21

What mass of (C12H22O11) is required to prepare 4.6L of a 0.4M solution?
What volume of a 0.7M solution can be prepared with 45g of copper (I) nitrate (CuNO3)? What volume of a 1.1M solution can be prepared with 100g of Mg(NO3) 2)
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04/23/21

Need help ASAP on this question

2x+1, x<-2 g(x)={ x2-2, -2≤x≤3 √x-10, x>3Evaluate g(1) and give the result
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04/23/21

How do you set up an ice table given 8.0 mL of 0.10 M HC2H3O2 is titrated with 0.10 M NaOH
Show all workHow do you set up an ice table given 8.0 mL of 0.10 M HC2H3O2 is titrated with 0.10 M NaOHKa = [H3O+][C2H3O2-]/[HC2H3O2]
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04/22/21

A rocket is launched. Find when it hits the ground to the nearest 100th of a second
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. Using this equation, find the time that the rocket... more
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04/22/21

how do you solve this problem ( how many moles are in 18.06x10^23 atoms of sodium )
please help me Its asking me what are the steps of this equation
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04/22/21

Convert 785.2 mm Hg to atmospheres. (Show your work)
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04/22/21

Mr. Carey paid $12 for 2 large popcorns and 2 large drinks that his family will share. Mrs. Molina bought 1 large popcorn and 4 large drinks and paid $15. How much does each item cost?

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04/22/21

ASAP need help am Stuck
ASAP need help am Stuck 8.0 mL of 0.10 M HC2H3O2 is titrated with 0.10 M NaOH. Perform the following calculations pH of the acid before any NaOH is added  Volume of 0.10 M NaOH needed to reach the... more
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04/22/21

A cylinder used in a lab contains a gas at 7.40 atm and 27 oC. What would the pressure of the gas be if the temperature changed to 77 oC?
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04/21/21

How much 0.5 M HCl solution can be made by diluting 200 mL of 3 M HCl solution? A. 1.0L B. 0.2L C. 1.2L D. 0.5L
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