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1. ### bond with an electronegativity difference of 2.01 is classified as ionic, whereas one with an..?

... for Oxygen is 2. In reality, 1.99 is almost the same with 2. But 2.01 is bigger than 2...

1 Answers · Science & Mathematics · 23/04/2012

2. ### how do you express the ratio 99.5 g/mol in kg/kmol?

there are 1000 g in a kilogram and 1000 moles in a kilomole so 1 kilogram / kilomole = 1000g/1000moles = 1g/mole conversion is 1:1 99.5g/mole = 99.5 kg/kmol

3 Answers · Science & Mathematics · 20/01/2010

3. ### At what temperature does it freeze?

75 C

1 Answers · Science & Mathematics · 22/05/2011

4. ### Stoichiometry Question?

... of Water . M.W. of Methane = 16 g (1.99 x 10^-9) / 16 = 1.24 x 10^-10 = moles of methane M.V. of...

1 Answers · Science & Mathematics · 11/10/2012

5. ### pKa for a Weak Acid...Help (10 points)?

do an ICE table for the reaction HA + H2O -> A- + H3O+ Ka= [A-][H3O+]/[HA] pH=-log([H+]) plug in the pH, solve for H+ and you get the change in concentration...

2 Answers · Science & Mathematics · 07/11/2011

6. ### make 100ml of intermediate solution of 10mg L -1 SODIUM from 1000mg L-1?

1 mL of your 1000 mg L-1 stock is added to 99 mL diluent to give you 100 mL 10 mg L-1 working solution. 10 / 1000 = 1 / 100 = 1 + 99.

1 Answers · Science & Mathematics · 23/12/2010

...gas constant = 0.08206 (L*atm)/(mol*K) T = temperature = 273K PV = nRT (1 atm)(V) = (1.99mol)(0.08206 (L*atm)/(mol*K)(273K) V = 44.58 L What do you think?

1 Answers · Science & Mathematics · 11/10/2012

8. ### How much heat is required to convert 866g of ice at -10 degrees celsius to stream at 126 degrees celsius?

...from 100 to 126 degrees Celsius: q = mcΔt q = (866 g) * (1.99 J/g*C) * (26 C) q = (44806.8 J / 1) * (1 kJ / 1000...

2 Answers · Science & Mathematics · 18/08/2011

9. ### What is the mass of NaBr in the mixture?

...you stated, the total mass of Cl and Br is equal to 1.99 g - 0.76 g = 1.23 g. Two unknowns require two equations...

2 Answers · Science & Mathematics · 09/09/2008

10. ### How many moles are present in 128 grams of sulfur dioxide?

to convert grams to moles, all you need to do is divide by the molar mass. The molar mass of SO2 is 64...

2 Answers · Science & Mathematics · 18/01/2012