02/04/25

Display the computation needed to get 0.05M CaCl2?
Display the computation needed to get 0.05M CaCl2.Edited by drift hunters 1 day ago
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01/27/25

Propane gas (C3H8) reacts with Oxygen in a combustion reaction, producing Carbon dioxide and water.

A) Write and Balance the following Word Equation: B) Using your balanced equation above, answer the following questions: in t chart belowHow many moles of Oxygen gas are necessary to react with... more
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01/22/25

intro chemistry

You are on the management team of a company that is considering purchasing a tanker truck. The truck you want has a volume of 26,000 liters and an empty mass/weight of 15,500 kg. However, the route... more
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01/20/25

Chemistry 100 level - Element X
Element X is powerful enough to reduce sodium ions to sodium metal. Barium is a strong enough reducing agent to reduce X. What is the identity of X?I wrote K(S) or C(S), but my professor marked the... more
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01/20/25

Chemistry 100 level
What is the oxidation number of S in NH4H2SO4?My professor says the right answer is +5, but Chat GPT says the right answer is +6, and she doesn't include +6 as one of the multiple choice options.... more
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01/11/25

In a rare moment of carelessness, Ardy Brickfuss sprinkles 4.26 x 1022 molecules of sucrose (C12H22O11) on his breakfast cereal. Calculate the mass of sucrose involved in this blunder.
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01/02/25

How do you find final temperature

The molar enthalpy of combustion for methane (CH4) is –2242.0 J/mol. 0.50 g of methane is used to heat 45.0 mL of water at 24.0°C. What is the final temperature of the water (assuming perfect heat... more
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12/10/24

Phase Transition Chemistry - Determine Boiling Point
Determine the normal boiling point of a substance whose vapor pressure is55.1 mm Hg at 35°C and has a ΔHvap of 32.1 kJ/mol.
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12/08/24

Buoyant force (Archimedes's principle)
If an object is more dense than the oil but less dense than the water, will the object sink deeper in oil or water?
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12/07/24

Partial Pressure in a Flask

A rigid 9.45 L flask contains a mixture of 1.50 moles of O2, 0.500 mole of N2 and sufficient Ar so that the partial pressure of Ar in the flask is 2.60 atm. The temp is 80 degrees C. total pressure... more
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12/07/24

Unknown gas diffusion
A sample of an unknown gas takes 434 s to diffuse through a porousplug at a given temperature. At the same temperature, N2(g) takes 175 sto diffuse through the same plug. What is the molar mass of... more
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12/07/24

Root Mean Square Speed of Helium
At what temperature in kelvin is the root mean square speed of heliumatoms (atomic weight = 4.00) equal to that of oxygen molecules (molecularweight = 32.00) at 300. K?Please include all steps.
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12/07/24

The vapor pressure of water at this temperature is 18.0 mm Hg.
A common way to produce hydrogen gas in the laboratory is to place ametal such as zinc in hydrochloric acid. A single replacement reactionproduces hydrogen gas. Suppose a student carries out this... more
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12/06/24

Two 20.0g ice cubes at -20C are placed into 275g water at 20C. Assuming no energy in transferred to or from the surroundings, what is the final temperature of the water after all the ice melts?
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12/05/24

Platinum NEED ANSWERED ASAP
how many electrons are in an ion of your atom after losing or gaining ve-
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12/04/24

Find the grams of the reactants at equilibrium and Find the initial grams of ammonia
Given Nitrogen gas + Hydrogen gas react to make ammonia at EQ. Kc and molarity of AMMONIA are given at equilibrium. You have to use the Kp concert to Kc and the given molarity to find X in a rice... more
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12/02/24

Calculate the pH of this solution.

Calculate the pH of this solution. Round to the nearest hundredth.pOH = 3.45
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11/27/24

Determine Molar Solubilty
Given solubility product of PbBr2 is 4.45*10^-6, determine molar solubility in a 0.318 M Pb(NO3)2 solution.
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11/25/24

what is delta h
Limestone stalactites and stalagmites are formed in caves by the following reaction: A* (aq) + 2HCO3 (aq) → CaCO3(s) + CO2(g) + H20(l) If 1 mol of CaCO forms at 298 K under 1 atm pressure, the... more
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11/24/24

How to calculate molarity from a solution’s concentration and volume?
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11/21/24

Hi! So for this question my teacher is saying that 4 bars into the circle is correct. Can anyone explain why?
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11/19/24

Chemistry pre-Lab 12
a. Balance the following reaction in an acidic solution. Fe2+ + Cr2O7^2- → Fe3+ + Cr3+b. When a 0.80 g sample of an unknown Fe2+ salt is titrated with 0.0285 M K2Cr2O7, it is found that 59.2 mL of... more
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11/19/24

Thermochemistry Exercises 11
A piece of metal (34.9 g) was heated to 95.0 degrees Celsius and then added to 550-g water having an initial temperature of 28.2 degrees Celsius. If the final temperature of the water and the metal... more
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11/19/24

Thermochemistry Pre-Lab 10
A. A sample of 0.72 g of Al is reacted with 17.0 mL of 2.4 M KOH. Which one is the limiting reagent?2Al (s) + 2KOH (aq) + 6H2O (l) → 2KAl(OH)4 (aq) + 3H2 (g)B. Calculate the theoretical yield of... more
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11/17/24

Thermochemistry Pre-Lab Assignment 11
A 56.3-g sample of water was heated to 51.2 C and added to 45.8 g of 20.3 C water in a calorimeter. Assume that no heat was lost to the surroundings including the calorimeter. Assume that no heat... more
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