09/09/20

A neutral isotope has a mass number of 65 and 36 neutrons. Identify the element symbol of this isotope and determine the number of protons and electrons.
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09/09/20

A Se atom has a mass number of 79 . How many neutrons, protons, and electrons are there?

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08/27/20

What mass (in g) of solute is contained in 465.8 mL of a 0.419 M solution of glucose, C6H12O6? Enter your answer with 3 significant figures and no units.
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07/27/20

How many grams of P are there in a sample of P that contains 6.91×1023 atoms
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07/24/20

Pb(NO3)2 (aq) + BaCl2 (aq)= PbCl2 (s) + Ba(NO3)2 (aq) Write the balanced net ionic equation for the reaction.
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07/24/20

Write the net ionic equation for the following molecular equation. CaCl2(aq) + (NH4)2CO3(aq)= CaCO3(s) + 2NH4Cl(aq)
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07/21/20

What volume of a 0.307 M nitric acid solution is required to neutralize 21.1 mL of a 0.110 M potassium hydroxide solution?
 mL nitric acid
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07/21/20

If we start with 1.000 g of strontium-90, 0.908 g will remain after 4.00 yr. This means that the half-life of strontium-90 is ________ yr.
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07/16/20

9. NEED HELP FAST

An aqueous solution at  25 ∘C  is  7.53%  LiOH by mass and has a density of  1.091  g/mL.What is the pH?pH=
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07/11/20

When aqueous solutions of nickel(II) bromide and sodium phosphate are combined, solid nickel(II) phosphate and a solution of sodium bromide are formed. The net ionic equation for this reaction is:
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07/06/20

How much energy (in J) is contained in 1.00 mole of 699 nm photons?
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04/23/20

An atom of 113I has a mass of 112.923650 amu. Calculate the binding energy in MeV per NUCLEON. Enter your answer with 3 significant figures and no units.

Use the masses: mass of 1H atom = 1.007825 amumass of a neutron = 1.008665 amu1 amu = 931.5 MeV
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04/16/20

How many miles of CO2 are produced if 1.50 miles of C3H8 combust
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