B1 moles
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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what equation links together moles, mass and RFM?
moles = mass/ RFM
what equation links together moles, concentration and volume?
moles = conc x vol volume has to be in dm3
what is the equation for percentage yield?
% yield = (actual mass of product/ desired mass of product) x 100
what is the equation for atom economy?
atom economy = (mass of wanted product/ mass of all products) x 100
why is hydrogen a good fuel?
• burning hydrogen does not release CO2. • hydrogen is flammable. • hydrogen can be used as a fuel, which is eco friendly.
what’s the equation for percentage uncertainty?
percentage uncertainty = number of measurements x (equipment uncertainty/ actual measurement) x 100
what does PV = nRT represent?
P (change in pressure= Pa) V (volume = m3) n (number of moles) R (gas constant = 8.31) T (temperature = in kelvin) PV = nRT
metal + acid >
salt + hydrogen
alkali + acid >
salt + water
base + acid >
salt + water
carbonate + acid >
salt + water + carbon dioxide
what are all bases?
H+ acceptors.
what are alkalis?
:OH- donors and H+ acceptors.
what are acids?
H+ donors, which give away H+ to bases.
what is Avogadro’s constant?
6.02 x 10^23 mol-1