Chemistry

Chemistry, 04.08.2019 04:30, misrachel03

How do you convert between the volume of a gas at stp and the number of moles of the gas?

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Chemistry, 21.07.2019 02:40, SethSimunek

First, i would balance the chemical equation. i would convert the volume of hcl to mol hcl by dividing by the molar volume. next, i would use the balanced equation to find out how many moles of the salt are needed to produce the moles of hcl. finally, i would multiply by the molar mass of the salt to convert moles to mass.

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Chemistry, 22.07.2019 21:40, kseniyayakimov

Na chemical reaction, exactly 2 mol of substance a react to produce exactly 3 mol of substance b. 2a⟶3b how many molecules of substance b are produced when 27.6 g of substance a reacts? the molar mass of substance a is 27.8 g/mol. step 1: convert the mass of a to moles. moles of a: mol step 2: convert the number of moles of a to the number of moles of b. moles of b: mol step 3: convert the number of moles of b to molecules of b. molecules of b:

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Chemistry, 14.09.2019 10:30, ronaldo22

part a; the equation for molarity, m, is m=n/v where v is volume and n is the number of moles of solute. a certain solution has a molarity of m = 2.73 mol/l and has a volume of v = 0.650 l . what is the value of n? express your answer numerically in moles. part b; the equation for photon energy, e, is e=hcλ where h = 6.626×10−34 j⋅s (planck's constant) and c = 2.99×108 m/s (the speed of light). what is the wavelength, λ, of a photon that has an energy of e = 3.98×10−19 j ? express your answer numerically in meters. part c; the ideal gas equation is pv=nrt where p is pressure, v is volume, n is the number of moles, r is a constant, and t is temperature. you are told that a sample of gas has a pressure of p = 899 torr , a volume of v = 3280 ml, and a temperature of t = 307 k . if you use r = 8.206×10−2 l⋅atm/(k⋅mol) , which of the following conversions would be necessary before you could find the number of moles of gas, n, in this sample? check all that apply. view available hint(s) check all that apply. convert the pressure to atmospheres (atm). convert the pressure to pascals (pa). convert the volume to cubic meters (m3). convert the volume to liters (l). convert the temperature to degrees celsius (∘c). convert the temperature to degrees fahrenheit (∘f).

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