Chemistry Help?
1.) (8.90 × 10^23 atoms) / (6.022 × 10^23 atoms/mol) × (26.98154 g Al/mol) = 39.9 g Al 2.) (516.8 g CCl4) / (153.8227 g CCl4/mol) x (1 mol C / 1 mol CCl4) x (12.01078 g C/mol) = 40.35 g C 3.) (1.75 × 10^24 atoms) / (6.022 × 10^23 atoms/mol) = 2.91 mol
Chemistry Help?
1. Hydrogen sulphide ( sulfide - american spelling) 2. Ammonium acetate 3. Iron (II)chloride 4. Barium hydroxide 5. Mercuric (II)iodide 6. Sodium phosphate 7. Phosphorous pentachloride 8. Sodium sulphate ( sulfate - american spelling) 9. Aluminium cyanide 10. Copper (II)nitrate Hope that helped... PS- I am sure all the above is right! PSS- The II stands for the valency of metals. for eg. iron has two valencies +2 or +3. here the valency of the above mentioned metals are +2
Chemistry help help help ?
Amreen, Your equation gives you the ratios you need to apply: N2 + 3H2 ---> 2NH3 For every mole of ammonia being formed, you needed one-half mole of nitrogen gas and 3/2 mole hydrogen gas. Just to check, if you want to form 22.5 moles of ammonia, you will need 22.5 x 1/2 = 11.3 moles of N2. Since they provide 14.5 moles of N2, you have more than enough. Now, how much hydrogen do you need? That would be 22.5 x 3/2 = 33.8 moles of H2 (answer #1). Hope that helped!
CHEMISTRY HELP!!!!!!!!!!!!! EASY 10 PTS?
balanced equation .. 1 Zn + 2 HBr ---> 1 ZnBr2 + 1 H2 if Zn is the limiting reagent, this much H2 is formed .. 5.00g Zn * (1 mol Zn / 65.68g Zn) * (1 mol H2 / 1 mol Zn) = 0.07648 mol H2 but if HBr is the LR, then this much H2 is formed .. 35.0mL HBr * (1L / 1000mL) * (4.00 mol HBr / L HBr) * (1 mol H2 / 2 mol HBr) = 0.07000 mol H2 since HBr gave less H2, it must be the LR and 0.07000 mol H2 is formed then .. PV = nRT .. P = nRT/V = (0.07000mol H2) * (0.08206 Latm/molK) * (298K) / (1.50L) = 1.14 atm
Chemistry Help HELP help HELP?
its just about converting and doing simple math.... divide mL by 1000 to get L. and add em up all together with the same units. the first one... just do it.
STOICH. CHEMISTRY Help?
okay given the following reaction: C3H8 + 5O2 --> CO2 + 4H2O if you start with 14.8 g of C3H8 and 3.44 g of O2, determine the number of moles of carbon dioxide produced? I am really bad at Stoich. so I honestly can't remember how to use dimensional analysis to figure this out. Please help. Thanks!!
Would chemistry help with cooking?
My degree is in Food Chemistry, and while it did give me a great understanding of food manufacturing, the components of food and how they interact as well as many other things, I would say it only marginally improved my cooking. In your case, you would learn about the chemical mechanisms of baking, what reacts to make bread turn brown and things like that. That wouldn't necessarily translate to you being an excellent baker though. If baking is your passion, you might consider being trained as a pastry chef later on. Edit: To address your concern about whether you should take biology instead, I think if you prefer that then you should go with it. Neither subject is going to have a huge effect on whether you become a great cook and you will need special training if you want to improve, irrespective of the one you choose. One more thing: before selecting one, check out the requirements to be trained as a baker or pastry chef to make sure that a background in chemistry is not one of them (I highly doubt that is the case though).
How does chemistry help a nurse's job?
I want to know how chemistry helps a nurse in her job as it is stated in our assignment. I am so helpless and I need to know it from a true nurse. Please! Help me! It is now or never. It is supposed to be an interview yet I hardly know anyone. Please help me...;c