The charge of electron cloud of Atom x equals to - 4x10to the power-18 C, write the atomic representation knowing that it has 30 neutrons.

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?