Search & Filtering
the CO2 gas reaches the fire in 3.9 seconds, at what time will the CH4 reach the fire?
Your answer
Submit
Europium metal crystallizes in a body–centered lattice with the unit cell measuring 4.58
A° along each edge. Determine the volume of a unit cell.
2. The following data are measure for a mixture of volatile liquid M and N at 1.013 bar. T(°C) 78 75 70 70 75 80 XM 0.00 0.04 0.21 0.86 0.96 1.00 Ум 0.00 0.18 0.42 0.66 0.83 1.00 (a) Estimate the azeotropic composition. (b) Estimate the mole fraction range of liquid M for which pure liquid M will obtained. Briefly explain your answer. (c) Estimate the amount of liquid N in both phases if 0.08 g of liquid M and 0.02 g of liquid N were mixed at 72 °C. (d) If the mixture of XM= 0.96 heated at 74 °C, what is the composition of liquid Mand N in the last drop of liquid and in first vapor appear. (e) If the mixture in part (c) were heated, which liquid will be the distillate and residue?
A student was asked to make up a 10% w/w solution of sodium carbonate. Calculate the amount of solute and solvent required to prepare that
The rate constant for the decomposition of a substance X is 6.2×10⁻³ s⁻¹. This reaction follows the first order kinetics. If the initial rate of decomposition of X is 3.1×10⁻⁴ Ms⁻¹, calculate the initial concentration of X. Also calculate the time required for 87% decomposition of X at ths temperature.
at stp, how many grams of MgCO3 should be heated to have a resulting 3.59 of CO2
If a solid PQ have NaCl type structure is heated so that the ions along one body diagonal are lost and trivalent ions(R) enter interstitial sites to maintain the electrical neutrality so that the new empirical formula unit is PxQyRz(x,y,z are smallest possible integers). The values of x+y+z is [Q- form the lattice]
What volume of a 0.750 M solution of BeF2 is required to obtain 0.325 mol of BeF2
Search out discoveries in science and their applications in daily life (1900-1925)۔
Also mentioned discoveries which noble prize only between 1900-1925.
2 Las entalpías estándar de formación, a 25,00 ° C, de metano (CH4 (g)), agua (H2O (I) y dióxido de carbono (CO2 (g)) son, respectivamente, -74,6 kJ / mol, -285,8 kJ / mol y-393,5 kJ / mol. Calcule la cantidad de calor liberado (en kJ) durante la combustión de 17. 52 L de metano bajo una presión constante de 1.000 atm a 25.00 ° C (NB la combustión es la reacción con oxígeno molecular para producir agua y dióxido de carbono)
