In April 2024
Search & Filtering
What is polymorphism and how does it affect bioavailability of drug substances
Describe a matrix scientific organization in industrial scientific research.
What are the biggest differences between industrial and academic scientific research?
What are the various parts of a typical industrial career title ladder in Science? Describe the general responsibility set of each tier
6. Nitrous oxide, NO, is sometimes used in dentistry. It is produced when
ammonium nitrate(NH,NOg) decomposes in the reaction below.
(NHANO3) - N20 + 2H20
a. How many moles of NH,NO; are required to produce 5.6 moles of Ng0?
b. How many grams of NO is that?
5. How many moles of CO, (carbon dioxide) are produced when 5.5 moles of Oz
(oxygen) is used in the reaction below?
26gH18 + 2502 - 16CO2+ 18H20
B. How many grams of oxygen is that?
4. How many moles of Feliron)are produced with 3.45 moles of Mg(magnesium)?
3Mg + FezO - 2Fe + 3MgO
b. How many grams of Mg is that?
2. How many moles of Na2O (sodium oxide) are produced if 1.5 mol of Fe(iron) is
produced in the following reaction:
6Na + Fe2O3 - 3Na,O + 2Fe
3. If 4.3 moles of CaC2 (calcium carbonide) are used up in the reaction below, how
many grams of HO(water) are needed?
CaC2 + H20 - CaH2 +Ca(OH)?
1. Hydrogen gas can be produced through the following reaction
Mg + 2HCI - MgCl2 + H,
a. How many grams of HC|(hydrochloric acid) are used by the reaction of 3.50
moles of Mg (magnesium)?
There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 12.01%. The percentage of the X-21 isotope is 87.99 % What is the contribution (in amu) to the weighted average from the X-21 isotope, which has a mass of 21.00 amu?
