Posts by khin

Total # Posts: 14

chemistry
how can i know whether solution is acidic or not and then what type of acid?

chem
sorry . Can you please help me with this questions If you know? Oxalic acid is a relatively strong diprotic acid with Ka1 = 5.6 ´ 10-2 and Ka2 = 5.1 ´ 10-5. What is the C2O42- concentration in a solution that is 0.10 M in oxalic acid and 1.0 M in HCl? (Consider ...

chemistry
Chloroacetic acid has a relatively large equilibrium constant, so at low acid concentrations it is necessary to use the quadratic equation in order to calculate the concentrations of the aqueous species. Ka for ClCH2COOH is 1.4 ´ 10-3. For the problems that follow, ...

Chemistry
Which of the following species would NOT function as an oxidizing agent? a. MnO4- b. Mn+2 c. H+ d. S e. Br-

Chemistry
Identify the spectator ion(s) in the following reaction: Cu(OH)2(s) + 2H+(aq) + 2Cl–(aq) Cu2+(aq) + 2Cl–(aq) + 2H2O(l) a. Cu2+ and Cl- b. H+ and Cl– c. Cu(OH)2 d. Cl– e. Cu2+

chemistry
What is the net ionic equation for the reaction of H2SO3 with Ba(OH)2?

Chemistry
C9H20 + 19/2O2 -> 9CO2 + 10H2O Please Can u find the physical states for this equation?

Chemistry
2NaHCO3 + H2SO4 ->Na2SO4 + 2H2O + 2CO2 Can u tell me physical states of the equation?

Chemistry
NaHCO3 + H2SO4 Na2SO4 + H2O + CO2 Use minimal integer numbers to balance the reaction. Include physical states in your answer.

chemistry
The figure below represents the bulls eye target for an archer. The black dots represent where the archer’s arrows hit: How can this archer be described? a. accurate b. precise c. accurate and precise d. neither accurate nor precise

chemistry
How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?

chemistry
How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?

MATH
10-___+9=59

esl
is practices (z or iz)