Given an atom with the electron configuration of 1s22s22phow many valence electron does this atom have

Why do people put rain gutters on the edges of the roofs of their homes?

some classmates conducted an experiment to find out which brand of paper towels is the strongest. you find out that they didnt try to control any variables write a few sentences explaning why they cannot draw any useful conclusions from their

List 3 elements tyat would have similar properties to chlorine

Only purple flowers result from a cross between purple-flowered pea plants and white-flowered pea plants. What does this indicate? Purple flowers are a mutation Purple flowers are recessive Purple flowers are dominant Purple flowers are hybrid

Why was creating a Beer's Law plot necessary? Choose the best answer. Group of answer choices in order to determine the amount of Fe2 + in the saturated iron (II) oxalate solution in order to monitor the degree of saturation over time in the iron

A vertical piston-cylinder device contains water and is being heated. During the heating process, 70 kJ of heat is transferred to the water, and heat losses from the side walls amount to 8 kJ.

Which of the following functions occurs in the part of the digestive system indicated by the arrow? Secretion of buffers and digestive enzymesAcid breakdown of swallowed foodsSecretion of bile and buffersAbsorption of water and ions

Sodium metal and water react to create sodium hydrogen and hydrogen gas through the unbalanced equation. Na + H20 - NaOH H2 By determining the limiting reactant, calculate the theoretical yield of hydrogen gas (in grams) if 79.

1) Mg (s) + 2 H + (aq) - --> Mg2 + (aq) + H2 (g)  H°12) Mg2 + (aq) + H2O (l) - --> MgO (s) + 2 H + (aq)  H°23) H2 (g) + 1/2 O2 (g) - --> H2O (l)  H°34) Mg (s) + 1/2 O2 (g) - --> MgO (s)  H°4

A substance has a solubility of 350 ppm. how many grams of the substance are present in 1.0l of a saturated solution