For hydrocyanic acid, HCN, Ka = 4.9 * 10-10. Calculate the pH of 0.20 M NaCN. What is the concentration of HCN in the solution? for the ph i got 10 is that right?

3Fe + 4H2O Fe3O4 + 4H2 1) How many molecules of H2 are produced? 2) How many oxygen atoms are found in the products? 3) How many moles of Fe3O4 are formed? 4) What is the ratio of the number of moles of Fe atoms to the moles of H2O molecules?

The overall chemical equation resulting from the sum of the following three steps is 2C (s) + 2H2O (g) → 2CO (g) + 2H2 (g) CO (g) + H2O (g) → CO2 (g) + H2 (g) CO (g) + 3H2 (g) → CH4 (g) + H2O (g) a. 2C (s) + 2H2O (g) → CO2 (g) + CH4 (g) b.

Convert the given amount as noted. 1.51 times 10^24 formula units of Iron (II) hydroxide to grams

Discuss how scientists use data on waves to monitor the environment 1. 2. 3. 4. 5. 6. 7. 8. 9.

How many liters are in 5.98 moles of nitrogen gas at STP? a) 0.267 L b) 95.7 c) 134L d) 3.60 x 1024L

A compound that changes color when it comes into contact with an acid or base is an?

1. A food sample is burned in a calorimeter that contains 2000. g of water. The temperature increases from 22.0°C to 44.3 °C. How many Calories does the food sample contain, assuming all of the energy from the food was transferred into the water?

Why doesn't water light on fire? It has all the ingredients except heat! Hydrogen for the flammability factor, oxygen so it can keep burning, and all you need to do is add heat and BOOM you have a flame! 15 pts

The type of social bonds present in modern societies that are based on difference, interdependence, and individual rights is called:

The difference between ionic covalent and metallic bonding