Please check the calculations and pay attention to the unit analysis.
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2 attempts left Check my work Be sure to answer all parts. Calculate the density in...
2 attempts left Check my work Be sure to answer all parts. Rep Consider the following apparatus. Calculate the partial pressure of helium (He) and neon (Ne) after the stopcock is open. The temperature remains constant at 16.0°C. Guid He Ne 1.20 L 1.230 atm 3.40 L 2.80 atm Partial pressure of He: 2.068 Partial pressure of Ne: 319 3 attempts left Check my work Enter the equivalent decimal and percent. Repo 29 100 The decimal is Guide: The percent...
2 attempts left Check my work Be sure to answer all parts. Enter your answer in scientific notation. Calculate K, for the following equilibrium: 2502(g) + O2(g) = 2803(); K = x 10 Kn=2.5 x 1010 at 725 K.
3 attempts left Check my work Be sure to answer all parts. Calculate the molalities of the following aqueous solutions: (a) 127 M sugar (CiHOn) solution (density of solution 1.12 g/mL) 1.85 (b) 0.829 M NaOH solution (density of solution 1.04 g/mL (c) 5.21 M NaHCO solution (density of solution 1.19 g/mL) 2 3 4
3 attempts left Check my work Be sure to answer all parts. Give the IUPAC name for the following compound. он NO2 (select)
2 attempts left Check my work Be sure to answer all parts. Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) → 2NO2(g) Initially NO and O2 are separated in two different chambers connected by a valve. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end and calculate their partial pressures. Assume that the temperature remains constant at 25°C. Initial conditions are as follows: NO: 3.97 L, 0.500...
2 attempts left Check my work Be sure to answer all parts. A biochemical engineer isolates a bacterial gene fragment and dissolves a 16.0-mg sample in enough water to make 30.0 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C. (a) What is the molar mass of the gene fragment? g/mol (b) If the solution density is 0.997 g/mL, how large is the freezing point depression for this solution (K of water = 1.86°C/m)?
2 attempts left Check my work Be sure to answer all parts. Calculate the maximum numbers of moles and grams of HS that can form when 167.3 g of aluminum sulfide reacts with 143.0 g of water: Al,S3 + H,0 - Al(OH)3 + H2S (unbalanced) 3.34 14,5 133.9 XL, What mass of the excess reactant remains? 41.31 Xxcess reactant
10 attempts left Check my work Be sure to answer all parts. Calculate the amount of heat (in kJ) required to heat 4.78 kg of water from 19.73°C to 47.55°C. q=2 x 10 Enter your answer in scientific notation.
3 attempts left Check my work Be sure to answer all parts. Calculate the K, of a weak acid if a 0.019M solution of the acid has a pH of 3.09 at 25°C. x 10 (Enter your answer in scientific notation.)
3 attempts left Check my work Be sure to answer all parts. Calculate the amount of heat (in kJ) required to heat 1.73 kg of water from 18.27°C to 50.18°C. q= 1x10 kJ Enter your answer in scientific notation. .