10/15/21

Stoichiometry equation

Write a complete balanced reaction for this experiment: (1) NaHCO3 + CH3COOH → H2CO3+ NaCH3COO(2) H2CO3 (aq) → H2O(l)+ CO2 (g) combine both equation for molecular reaction a) In molecular form... more
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10/15/21

How much heat is required to raise the temperature of 50g of water from 20ᵒC to 150ᵒC? The specific heat of water is 4.184 J/gᵒC.

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10/15/21

Consider These Reactions
Consider these reactions, where M represents a generic metal. 2M(s)+6HCl(aq)⟶2MCl3(aq)+3H2(g)Δ𝐻1=−626.0 kJ HCl(g)⟶HCl(aq) Δ𝐻2=−74.8 kJ H2(g)+Cl2(g)⟶2HCl(g) Δ𝐻3=−1845.0 kJ MCl3(s)⟶MCl3(aq) ... more
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10/14/21

What is the pH of 1000. mL of a 0.0033 M solution of phenol (C6H5OH)?

Note: conjugate base, NaC6H5O  has a Kb = 9.43 x 10-5 .
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10/14/21

Given 100. mL of a 0.245 M solution of pyridine (C5H5N pKb = 8.77), what is the pH if 100. mL of 0.245 M HCl is added?
Your help would be greatly appreciated.
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10/14/21

Suppose an oven’s radiation wavelength is 0.125 m. A container with 300.00 g of water was placed in the oven, and the temperature of the water rose from 20.0°C to 80.0°C.

How many photons of this microwave radiation were required to heat the water? (Assume that all the energy from the radiation was used to raise the temperature of the water.)
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10/14/21

Ibuprofen (C13H18O2) is an analgesic (painkiller). What is the molar mass of ibuprofen?

Ibuprofen (C13H18O2) is an analgesic (painkiller). What is the molar mass of ibuprofen? 
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10/14/21

How many moles of each type of atom are in one mol of C6H12O6?
How many moles of each type of atom are in one mol of C6H12O6? a. 1 mole of C atoms, 12 moles of H atoms, and 1 mole of O atoms b. 6 mole of C atoms, 12 moles of H atoms, and 1 mole of O... more
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10/14/21

What is the electron arrangement for Oxide ion and Sulfur Ion?
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10/14/21

please help wth this chemistry question
Describe the preparation of 250 ml of ca. 0.1 M Fe(NH4)2(SO4)2×6H2O solution in 5 % v/v H2SO4.                                              [Molar mass, Fe(NH4)2(SO4)2×6H2O = 392.14 g mol-1]Prepare... more
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10/14/21

The specific heat of a certain type of cooking oil is 1.75 J/(g·°C). How much heat energy is needed to raise the temperature of 2.82 kg of this oil from 23 °C to 191 °C
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10/14/21

Identify the products formed in this Brønsted-Lowry reaction. HCO−3+HNO2↽−−⇀acid+base
I believe that HNO2 is an acid and HCO−3 is a base, but then I do not know how to move on. I would really appreciate some help. Thank you.
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10/13/21

Which of the following statements is true?
A. Activation energy is the energy necessary to start a chemical reaction.B. The gaseous state has the highest amount of entropy associated with it.C. Enthalpy of formation is the change in... more
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10/13/21

Which of the following has a △Hf of zero?
_______ has a ΔHf of zero.A. Br-B. Na+C. H2OD. CO2E. O2For this I got E. O2 Would this happen to be correct?
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10/13/21

potassium nitrate reacts with copper (I) sulfite, how do you predict the product?
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10/13/21

Answer the following nomenclature questions

a. Formula for radium bromide b. Name the compound S2O5c. Formula for hypofluorous acid d. Name the compound PbO2e. Name the compound PbOf. Name the compound H3Asg. Name the compound Cu2SO4 .... more
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10/12/21

I’m not quite sure how to do this problem
A gas absorbs 62 KJ of heat and does 94 KJ of work. Calculate (triangle symbol) E in kJ
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10/12/21

How do I Solve this

Calculate the work (in liter-atmosphere) for the expansion of CO2 from 1.2 to 2.5 liters against a pressure of 1.2 ATM
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10/12/21

How do you solve this
What is the oxidation state of nitrogen in nitrate (NO3- )
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10/12/21

I’m not too sure how to solve this
Question 23:calculate the root mean square velocity (m/s) of the CH4 molecules in a sample of CH4 gas at 546K.
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10/12/21

How do I Solve this
Question 18:If 0.750 mole of nitrogen gas occupies a volume of 23.1 L at zero Celsius, what volume will 3.50 mole of nitrogen gas occupy at the same temperature and pressure?
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10/12/21

Can someone please check if my answers to these problems are correct?
Which of the following statements is correct?A. The solid state has the least amount of entropy associated with it.B. The gaseous state has the least amount of entropy associated with it.C. The... more
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10/12/21

Help me solve this problem!!!
You have found that 13.85mL of 0.112M sulfuric acid reacts with exactly 20.00mL of barium hydroxide solution of unknown concentration. What is the molarity of the barium hydroxide solution? Round... more
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10/12/21

One millimole of Ni(NO3)2 dissolves in 260.0 mL of a solution that is 0.300 M in ammonia. The formation constant of Ni(NH3)6^2+ is 5.5×10^8.
What is the initial concentration of Ni(NO3)2 in the solution? What is the equilibrium concentration of Ni2+(aq) in the solution?
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10/11/21

How many grams of sodium contain the same number of atoms as 15.9 g of potassium?
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