04/30/22

What is the aim of Borax experiment

Procedure: Weigh out 1.907 g Borax on sensitive Place the Borax in a 100 mL beaker.  Add a small volume of distilled, deionized water to dissolve the borax (if it is not dissolved stir it with... more
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04/30/22

Co-ordination Chemistry and Colour - Uni Level

Determine the number of d electrons in the metal ion:A. [Fe(CN)6]4-B. [Co(NH3)6]2+C. [CoF6]3-
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04/29/22

If the base solution is 0.50 M NaOH, and the volume of the initial acid solution as 25.00 mL, what is the concentration of the acid solution?

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04/29/22

HELP WITH CHARLES LAW PLS
What would be the final size of the balloon if it was originally 4.0 L at 10°C it the temperature is -20°C?
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04/29/22

Calculate the standard free-energy change for the reaction at 25 ∘C. 2Au3+(aq)+3Mg(s)↽−−⇀2Au(s)+3Mg2+(aq)
Delta G= ?kJ
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03/23/21

P+O2⟶P2O5P How many moles of diphosphorus pentoxide are produced for every 5.4 moles of phosphorus? Round your answer to 1 decimal place.
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03/23/21

read description

In a study to determine the rate of the following reaction: 2NO(g) + O2(g) —> 2NO2(g)the concentration of NO was 0.0350 M at t = 5.0 s and 0.0225 M at t = 650.0 s. What is the average rate of... more
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03/23/21

if 24 grams of propane(CO2) are produced from the reaction below, and you are told there is excess oxygen (O2) present, how many grams of C3H8 did you start with?
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03/23/21

How many atoms of Oxygen are there in 15 g of sodium bicarbonate?
Sodium bicarbonate (NaHCO3) is commercially known as baking soda.         (Molar mass of NaHCO3 = 84.01 g/mol) 
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03/22/21

How many grams of Mg will you need to produce 15.8 grams of MgO?
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03/22/21

What is the maximum mass in grams
When 23.7 g NaCl and 128.2 g H2SO4 are mixed and react according to the equation below, then what is the maximum mass in grams (g) of Na2SO4 that can be produced? Report your answer to one decimal... more
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03/21/21

What is the percentage yield
What is the percentage yield of silver chromate if you mix solutions containing 0.016 mols of potassium chromate with 0.009 mols of silver nitrate, and actually produce 0.971 g of silver... more
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03/21/21

please help on this chemistry homework i need help ASAP PLEASE HELP thank youuuuu so much
It takes 55.0  to raise the temperature of an 11.4  piece of unknown metal from 13.0 to 24.3 . What is the specific heat for the metal?Express your answer with the appropriate units.
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03/19/21

Stoichiometry Map

2FeCl3 + MgO —> Fe2O3 + 3MgCl2
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03/19/21

Find the solubility of lead(II) sulfate in 0.28 M Na2SO4(aq). The solubility product of lead(II) sulfate is 1.6 x 10^-8. Answer in units of mol/L.
I got a really weird answer can someone help?
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03/19/21

question for chemistry
A sample of gas in a flexible container has an initial volume of 2.5 L. If the pressure starts at 0.75 atm and changes to 0.54 atm while the temperature goes from 250.0 K to 250.3 K, what is the... more
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03/18/21

Chemistry: polyatomic Ions
Which polyatomic ion forms a neutral compound when combined with an alkali metal in a 1:1 ratio? I. Ammonium II. Peroxide III. Cyanide IV. Hydrogen phosphate
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03/18/21

Chemistry: solubility rules
According to the solubility rules, which of the following ionic compounds would form a precipitate if produced in a chemical reaction in water and why? I. NaCl II. MgCO3 III. LiOH IV. BaSO4
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03/18/21

Chemistry- Physical Science
25.0mg of potassium was isolated in pure form. After one hour, only 3.125mg of the radioactive material was left. What is the half-life of potassium?
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03/18/21

How many moles of Cl2 are required to react with 4.96 g of KMnO4? Show work please
Answer the question based on the reaction of potassium permanganate with hydrochloric acid. 2 KMnO4 + 16 HCl → 5 Cl2 + 2 KCl + 2 MnCl2 + 8 H2O How many moles of Cl2 are required to react with 4.96... more
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03/18/21

It is known that the density of a gas at STP is its molecular mass divided by 22.4L. Based on this information state Graham's Law in an alternative form.

It cannot be the two formulas below:r1/r2 = square root of M2/M1or d1/d2 = square root of M2/M1
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03/18/21

How does the concentration of ions (H3O+) in a strong acid differ from a weak acid?
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03/14/21

The combustion of ethane (C2H6) produces carbon dioxide and steam. 2C2H6(g)+7O2(g)⟶4CO2(g)+6H2O(g) How many moles of CO2 are produced when 5.95 mol of ethane is burned in an excess of oxygen?
The combustion of ethane (C2H6) produces carbon dioxide and steam. 2C2H6(g)+7O2(g)⟶4CO2(g)+6H2O(g) How many moles of CO2 are produced when 5.95 mol of ethane is burned in an excess of oxygen? more
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03/13/21

Transaction/billing

I don’t understand the billing. What is difference between purchase transaction and what the tutors charge?
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03/11/21

Convert 3.42 x 1023 molecules of H2SO4 to moles.
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