Calculate the number of magnesium atoms in a 70.0 g sample of forsternite Mg2SiO4

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98