How do I do this?

How do I do this?

I need help figuring out the equation for this problem. Do I add H20? If so, why and when do I need to?

What is the hydroxide-ion concentration in a 0.13 M solution of Na2CO3? For carbonic acid, Ka1 = 4.2 × 10–7 and Ka2 = 4.8 × 10–11. (Kw = 1.0 × 10–14)

A solution is made containing 8.4g of potassium nitrate per 125g of water. What is the weight/weight % or percent by mass of the solute?

If 114mL of 0.008 04M NaOH completely titrates 118 ml of H3PO4 solutio, what is the molarity of the H3PO4 solution?

The mass of an atom of an element A is eight times the mass of C12 isotop.What is the relative atomic mass of A?

2Na + H2O- Na2O + H2

what can I talk about these results that I have? Experiment 1: Sugar reading White: Brown: Brix - /20.9%/ /21.1%/ PA - /10%/ /10%/ SG - /1.07%/ /10.8%/ pH - /3.2/ /3.2/ Experiment...

Can you please explain in full depth? That would be very helpful!

A student places three ice cubes in a beaker and allows them to partially melt. If she measures the temperature of the water in the beaker, what will she most likely observe? Explain your answer....

What is the mass of 4.00 mol of Ca3(PO4)2

Help me with this question please, I can't figure it out.

Help me with this question please

in the balanced equation for the following redox equation, the sum of the coefficients is ___? Fe^3+ +I- = Fe^2+ + I2 a. 4 b. 5 c. 6 d...

List the individual steps used in constructing a Born - Haber cycle for the formation of BaI2 from the elements. Which of the steps would you expect to be exothermic? Write chemical equation...

sodium and neon lithium and chlorine cesium and magnesium nitrogen and fluorine oxygen and bromine potassium and oxygen

help me with this one please with steps

Molar mass of baking soda is 83.97 g/molMolar mass of vinegar : 60 g/mol

Molarity and molality of a solution (molecular weight=50) in aqueous solution is 9 and 10 respectively. What is its density?

I'm working on a lab and I need someone to explain how to calculate some of the data. If you could give me an example for each one I don't understand I would appreciate it so I can work out the rest...

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