315 Answered Questions for the topic General Chemistry

06/01/22

Calculate the boiling point and freezing point of the solutions

1. 0.575 molal aqueous solution 2. 10 g of C6H12O6dissolved in 259 g water.3. 0.5 mole Br2 dissolved in 507 g chloroform
General Chemistry Chemistry Basic Chemistry

05/02/22

Basic Chemistry Problem

Identify if the following conditions/materials have increased or decreased intermolecular forces. Vegetable oils can flow easily compared with honey Liquid helium has the lowest boiling point at... more
General Chemistry Chemistry

04/19/22

Solve the following problem. Refer to the given mass numbers in computing for the molar mass.

Molar numbers: Fe= 58.85O=161. If 0.95 g of Fe is used in the reaction how many moles of O2 are needed to completely react with Fe?
General Chemistry Chemistry

03/29/22

25.00mL of a sulfuric acid solution of unknown molarity is titrated to the second equivalence point with 20.95mL of 0.243M potassium hydroxide solution

25.00mL of a sulfuric acid solution of unknown molarity is titrated to the second equivalence point with 20.95mL of 0.243M potassium hydroxide solution. What is the concentration of the sulfuric... more
General Chemistry

03/28/22

Calculate ΔH the combustion of ethane using the given bond dissociation energies:       2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

Calculate ΔH the combustion of ethane using the given bond dissociation energies:      2 C2H6 + 7 O2 → 4 CO2 + 6 H2OBond dissociation energies:           C-C (347 kJ/mol); C-H (413 kJ/mol); O=O... more
General Chemistry Science Chemistry Biochemistry

03/20/22

Chemistry Problem Help

What is the step by step procedure of finding molar mass on these following? Glucose - C6H1206 Calcium Hydroxide - Ca(OH)2
General Chemistry

03/10/22

An experimental data on the reaction of H2 and PO3-3 is given below

Initial[PO3] [Initial H2] Initial RateExperiment 1 0.100 0.100 ... more
General Chemistry

03/08/22

Please help, this topic is about Hess's Law

Calculate the standard enthalphy of formation for methane gas , CH4, produced from graphite and hydrogen gas according to the following reaction: C(graphite) + 2H2(g)  CH4(g) Data given: a.... more
General Chemistry Science Chemistry Biochemistry

03/01/22

CONCENTRATION OF SOLUTIONS CHEMISTRY (MOLARITY)

What is the molarity of a solution that contains 25 g of KOH in 250 mL of solution?  What is the mole fraction of sulfuric acid (H2SO4) in 8% aqueous H2SO4 solution?
General Chemistry Chemistry Moles Stoichiometry

02/28/22

A certain mass of an unknown third period metal hydroxide reacts with an certain volume and concentration of a diprotic acid. How do I figure out the identity of the metal?

I used dimensional analysis and the molarity of the acid to find the moles of the acid, then multiplied it by the 1:2 stoichiometric ratio since it's a diprotic acid. This gave me the moles of the... more
General Chemistry Chemistry

02/26/22

What are the reaction rate expressions for each reaction?

What are the reaction rate expressions for each reaction? H2(g) + I2(g) —> 2HI(g) 2H2(g)+ o2(g) —> 2H2o(g)
General Chemistry Science Chemistry Moles

06/11/21

Mass of CaCl2: 10,0 g Mass of Na2CO3: 10.0 g Actual amount collected: 2.00 g CaCO3 1. Write a balanced chemical equation.

A student performs a lab at school. They massed out both reactants and then mixed them together. The reaction produced a precipitate. They filtered out the product and took the mass of it. (I'm a... more
General Chemistry Science Chemistry Moles

06/10/21

H2SO4 + 2 NaOH = Na2SO4 + 2 H2O How many grams of Na2SO4 could be produced from 4.94 moles of sulfuric acid?

Grateful for any help given!
General Chemistry

04/29/21

determine the molar mass of an unknown nonvolatile solute of non electrolyte compound raising the boiling point of 150g of benzene by 0.500 degree Celsius

This topic is about Calculating Boiling point elevation
General Chemistry Science Chemistry

04/21/21

Balanced equations

1. Write the balanced equation for the reaction of copper (I) oxide and Vinegar.2. Write the balanced equation for the reaction of copper (II) oxide and Vinegar.

From the data below, calculate the total heat (in J) needed to convert 0.816 mol of gaseous ethanol at 300.0°C and 1 atm to liquid ethanol at 25.0°C and 1 atm:

b.p. at 78.d degrees Ccgas: 1.43 J/g. degrees CDelta Hvap: 40.5 kJ/molcliquid: 2.45 J/g. degrees C

Sulfur dioxide is produced in enormous amounts for sulfuric acid production. It melts at −73.0°C and boils at −10.0°C....

Its DeltaH fus is 8.619 kJ/mol, and its DeltaH vap is 25.73 kJ/mol. The specific heat capacities of the liquid and gas are 0.995 J/g.K and 0.622 J/g.K, respectively. How much heat is required to... more

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