Mars has a mass of 6.42 * 10 ^ 23 kg, and the sun has a mass of 1.99 x 10 kgMars the sun atan average distance of 2.28 * 10 ^ 11 * m Calculate the force of gravity between Mars and the sun

1) this is the structure in the cell nucleus that houses a cell's genetic information

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?