The electron configuration 1s^2 2s^2 2p^6 3s^2 describes the electrons of which element?

sodium

manganese

phosphorus

magnesium

A gas at STP has a volume of 1.0 liter. If the pressure is doubled and the temperature remains constant, the new volume of the gas will be ... ?

Which statements about reducing sugars are true? D‑Glucose (an aldose) is a reducing sugar. The oxidation of a reducing sugar forms a carboxylic acid sugar.

Which of the following atoms has the largest atomic radius? Provide an explanation a Hydrogen b. Sodium C Lithium d Rubidium

You collect and measure samples of ice and surrounding ice water from a stream in the winter. you find that you collected the same number of water molecules in each form. the volume of the ice samples are larger than the ice water samples.

Calculate the molar enthalpy change of H2O (l) when liquid water is heated from 41.7 C to 76.2 C

What is hydrocarbon?

Why did most scientists reject Wegner's theory for nearly a half century?

Define prediction and explain how it is used to formulate a hypothesis.

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m