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# emily

Questions39

• ### college algebra problem?

Hi, can someone show me how to solve this? My professor cannot understand how to use a laptop with our schools going online, so I am struggling to answer this one. Thank you.

(7x^2 - 12)^1/4  =x

• ### chemistry salt bridge question?

Set up a cell that has a Mg electrode in a 1.0 M aqueous Mg2+ solution on the left side and a Cu electrode in a 1.0 M aqueous Cu2+ solution on the right side. Add the salt bridge. What is the balanced net ionic equation for this reaction? Include physical states.

• ### Find the oxidation numbers for each atom in the following ?

H2, Na+, Cl-, H2O, SO3, PCl3, PbBr4, C2H4

• ### combustion heat question?

A  2.017g sample of a new organic material is combusted in a bomb calorimeter. The temperature of the calorimeter and its contents increase from

25.09∘C  to 32.06∘C.

The heat capacity (calorimeter constant) of the calorimeter is 43.29kJ/∘C,

what is the heat of combustion per gram of the material?

• ### A researcher studying the nutritional value of a new candy places a 5.50g sample of the candy inside a bomb calorimeter ?

and combusts it in excess Oxygen.The observed temperature increase is 2.40∘C.If the heat capacity of the calorimeter is 35.50kJ⋅K−1,how many nutritional Calories are there per gram of the candy?

• ### Enthalpy question for chemistry?

Chemistry6 months ago