Технический фосфид цинка содержит металлический цинк в виде смеси. В результате взаимодействия технического фосфида и соляной кислоты было получено 8,96 л фосфина и 2,24 л водорода. Какова массовая доля фосфида цинка в техническом фосфиде?​

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

Surface currents are caused by blank space . question 14 options: surface currents are caused by? differences in water temperature high salinity differences in density wind forces

What type(s) of intermolecular forces are expected between ch3ch2cooh molecules? dipole forces, induced dipole forces, hydrogen bonding