Trộn 250 ml dung dịch chứa hỗn hợp HCl 0,08M và H2SO4 0,01 M với 250 ml dung dịch NaOH aM thu được 500 ml dung dịch có pH = 12. Giá trị a là:

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.