atoms in 3.08g of tetrachloromethane (CCl4) b. The number of moles of fluorine atoms in 204 g of boron trifluoride BF3; c. The number of moles of chloride in 5.55 g of calcium chloride‚ CaCl 2 d. The number of moles of sulphate ions in 144g of magnesium sulphate 3 e. The number of molecules in 1000 cm of barium nitrate 5. 100 cm3 of hydrogen chloride gas was mixed with a metallic compound producing a very volatile & explosive reaction. What is the mass of this gas at RTP? Chemist ry 6
Premium Molecule Hydrogen Chlorine
phosphate dihydrate‚ D & C Yellow #10 aluminum lake (in 25 mg tablet)‚ FD & C Blue #1 aluminum lake (in 25 mg tablet)‚ FD & C Red #40 aluminum lake (in 25 mg tablet)‚ FD & C Blue #2 aluminum lake (in 50 mg tablet)‚ hydroxypropyl cellulose‚ hypromellose‚ magnesium stearate‚ microcrystalline cellulose‚ polyethylene glycol‚ polysorbate 80‚ sodium starch glycolate‚ synthetic yellow iron oxide (in 100 mg tablet)‚ and titanium dioxide. Zoloft ZOLOFT is supplied for oral administration as scored tablets containing
Premium Selective serotonin reuptake inhibitor Posttraumatic stress disorder Magnesium
of O2 react? CHEMISTRY: A Study of Matter © 2004‚ GPB 8.13 3. ___Mg + ___HCl ___MgCl2 + ___H2 a. What mass of HCl is consumed by the reaction of 2.50 moles of magnesium? b. What mass of MgCl2 is produced if 3.67 moles of HCl react? c. How many moles of hydrogen gas are produced when 3.0 moles of magnesium react? 4. ___NH3 + ___O2 ___N2 + ___H2O a. How many moles of oxygen react with 0.23 moles of NH3? b. How many grams of water will be produced if 0.55 moles of oxygen
Premium Nitrogen Hydrogen Oxygen
Mg Magnesium -Mr. Magnesium replaced “r” with “g” in “Mr” and got the abbreviation of his name‚ Mg. Kr Krypton -Kryptonite is Superman’s enemy‚ so don’t confuse it with krypton the element. Ca Calcium -Cali eats calcium Br Bromine -Think of your bro when you think of Bromine‚ for the symbol erase the “o” and you got bromine. C Carbon -It’s really simple just think “C is for cookie‚ but also for Carbon.” As Arsenic -Arsenal is weapons‚ but arsenic is an element‚ think of As
Premium Chemical element Copper Magnesium
many electrons does Mg2+ have? (1 mark) Mg2+ has 10 electrons. A magnesium atom has 12 electrons with 2 of the 12 being valence electrons. Therefore the atom will lose the valence electrons which are located on the outermost shell to stabilize itself (outermost shell) as atoms tend to do what it easiest. Since magnesium lost 2 electrons it becomes positive as it is giving away electrons to stabilize other atoms. Hence magnesium then becomes Mg2+ because it lost 2 of the 12 electrons. Given that
Premium Oxygen Magnesium Oxide
w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level .c rs om 5070/11 CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB recommended) October/November 2011 1 hour *0909424295* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and
Free Oxygen Oxide Chlorine
Calculate the concentration of the solution formed when 23.61 g of sodium phosphate is dissolved in 475.0 cm3 of water. 2. What volume of water is needed to dissolve 85.8 g of silver nitrate to make a 2.650 M solution? 3. What mass of magnesium sulphate is needed to make 1500 mL of a 2.45 M MgSO4 solution? 4. Calculate the concentration of the solution formed when 59.78 g of ammonium hydroxide is dissolved in 856.0 cm3 of water. 5. What volume of water is needed to dissolve 150
Premium Sodium hydroxide Chlorine Magnesium
is meant by the term atomic mass. Atomic mass is the weight of protons and neutrons combined in an element 14. How many electrons are there in the neutral atoms of the elements listed in Question 13? Helium= 2 Oxygen= 8 Sodium=11 Magnesium= 12 Chlorine=17 Sulfur= 16 16. Fill in the following table: Element Mass Number Protons Neutrons - Cobalt 60 27 32 - Fluorine 19 9 10
Premium Water Sulfur Magnesium
spectrum was run. Next‚ apparatus for Grignard reaction was placed in an oven for an hour to ensure no moisture was present then set up for reflux with a dropping funnel to equalise pressure and a jack to allow easy removal of apparatus from heat. Magnesium turnings (2.68g)‚ anhydrous diethyl ether (15 cm3)‚ a crystal of iodine and a stirrer bar were added to the round bottomed flask (250 cm3) and anhydrous diethyl ether (25 cm3) and dry bromobenzene (15.7g) were added to the dropping funnel‚ ensuring
Premium Distillation Diethyl ether Magnesium
CASE STUDY US MAGNESIUM SEEKS PROTECTION In Feb 2004‚ US Magnesium‚ the sole surviving US producer of magnesium‚ a metal that is primarily used in the manufacture of certain automobile parts and aluminum cans‚ filed a petition with the US International Trade Commission (ITC) contending that a surge in imports had caused material damage to the US industry’s employment‚ sales‚ market share‚ and profitability. According to US Magnesium‚ Russian and Chinese producers had been selling the metal at prices
Premium International trade World Trade Organization United States