Tutor profile: Rachel R.
Questions
Subject: Latin
Translate the following: Arma virumque cano, Troiae qui primus ab oris Italiam, fato profugus, Laviniaque venit litora, multum ille et terris iactatus et alto vi superum saevae memorem Iunonis ob iram;
Arms, and the man I sing, who, forced by fate, And haughty Juno's unrelenting hate, Expelled and exiled, left the Trojan shore. Long labors, both by sea and land
Subject: Chemistry
2HCl + Ca(OH)2 -> 2H2O +CaCl2 How many grams of Ca(OH)2 are needed to neurtalize 25 mL of 0.5M HCl solution?
0.5= moles/.025 0.0125 = moles of HCl molar mass of Ca(OH)2 40.1 + (16 X 2) + (1.008 X 2) = 74.096 g .0125 moles of HCl X [ (1 mole of Ca(OH)2)/ 2 moles of Ca(OH)2 ] X { 74.096 grams of Ca(OH)2 / 1 mole of Ca(OH)2 ] = 0.5 grams of Ca(OH)2
Subject: Basic Chemistry
4(NH3) + 5(O2) -> 4(NO) + 6(H2O) How many moles of water are formed from 2 moles of oxygen gas?
2 moles of O2 X [ (6 moles of H2O) / 5 moles of O2 ] = 2.4 moles H2O
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