1 Answers
Call
Talk Doctor Online in Bissoy App
Explain how to prepare 18.0 mL of 2.0 M HCl from 6.0 M HCI solution. (Hint: Calculate volume of 6.0 M HCI needed. Then explain how to make the solution from your volume of 6.0 M HCI and water.)
Firstly, calculate the molar using the following equation M = 10XdensityXpercentage(37 in your case)/Molecular Weight. Then calculate the required molarity by dilution.
1 Answers 1 views
The heat of dissolution of potassium carbonate is -30.9 kJ mol<sup>-1</sup>. What would be the change in temperature if 4.00 g of potassium carbonate is dissolved in 0.10 L of water?
∆H = m x s x ∆T-30.9 = 4.2 × 4 × ∆T-30.9 = 16.8 × ∆T∆T = -30.9/16.8 = 1.84°C
1 Answers 1 views
If liquid carbon disulfide reacts with 450 mL of oxygen to produce to gases carbon dioxide and sulfur dioxide, what volume of each product is produced? a. 20 mL b. 150 mL c. 0.150 L d. 450 L
150 mL
1 Answers 1 views
Sulphuric acid reacts with potassium to form potassium sulphate and hydrogen. Determine the mass of potassium sulphate produced if 6.0g of hydrogen wa also formed
2K + H2SO4 = K2SO4 + H2 if m(H2) = 6 g, so n(H2) = 6 g / 2 g/mol = 3 moles; n(H2) : n(K2SO4) = 1 : 1;...
1 Answers 1 views
Potassium bromide reacts with chlorine to produce potassium chloride and bromine. How Many grams of bromine are produced when 15.0 g of potassium bromide are used?
Solution:The balanced chemical equation:2KBr + Cl2 → 2KCl + Br2According to the equation above: n(Br2) = n(KBr)/2Moles of KBr = Mass of KBr / Molar mass of KBrThe molar mass of...
1 Answers 1 views
Calcium carbonate decomposes to form calcium oxide and carbon dioxide on strong heating. What is the volume of carbon dioxide released, measured at r.t.p, when 10.5 g of calcium oxide is formed?
CaCO3 = CaO + CO2 nCO2 = nCaCO3 = mCaCO3/MWCaCO3 = 10.5 g/100.0869 g/mol = 0.1049 mol; VCO2 = nCO2*Vm = 0.1049 mol*24 L/mol = 2.5178 L ≈ 2.52 L
1 Answers 1 views
Ten grams of calcium carbonate was produced when carbon dioxide was added to lime water (calcium hydroxide in solution). What volume of carbon dioxide at STP was needed
CO2 + Ca(OH)2 = CaCO3 + H2Om(CaCO3) = 10.0 g(10 g CaCO3 / 1)(1 mol / 100.1 g)(1 mol CO2 / 1 mol CaCO3)(22.4 L STP / 1 mol) = 2.24 L CO2 STP
1 Answers 1 views
When strongly heated, CaCO2 decomposes into carbon dioxide gas and calcium oxide. What mass of calcium carbonate is needed to produce 120L of carbon dioxide at 28.0 degree Celsius and 1.1 atm?
535 g
1 Answers 1 views
Is potassium hyrdogen carbonate + hydrogen chloride -> potassium chloride + water + carbon dioxide a combustion reaction
No.Combustion reaction - ecsotermical prosecc, with intensiv burn energy (May be hv)this would be called neutralisation, if you take equivival ammount. Also or acid-base reaction
1 Answers 1 views
Nitrogen dioxide reacts with water to produce oxygen and ammonia:
4NO2(g)+6H2O(g)→7O2(g)+4NH3(g). How many grams of NH3 can be produced when 4.50 L of NO2 reacts at 435 ∘C and 695 mmHg ?
pV=nRT. n=pV/RT = 695 x 4500 / 62400 x 708= 0,0707912321 moles.0,0707912321 x 17 = 1,20345095 g.
1 Answers 1 views