An aqueous solution is prepared by mixing 0.2750 moles of naoh (40.00 g mol-1) with 189.0 g of water. its density is 1.065 g ml-1. the solute is completely dissociated. what is the percent by weight of naoh in the solution?

What is the iupac nomenclature of diethyl methane

What happens to particles when P waves and S waves pass through them? (A). Particles travel in waves as P waves pass through materials. Particles twist and shake as S waves pass through materials. (B).

A piece of candy is burned in a calorimeter raising up the tempature of 500g of water from 21 C to 25 C water has a specific heat of 4.18J/g C how much energy was released by the candy

Which of the following lists the characteristics that all matter has? A. It has mass. B. It has mass and takes up space. C. It has mass and can be seen without a microscope. D. It has mass, takes up space, and can be seen without a microscope.

For a particular collision, she detects the emitted products and find 15 protons, 2 antiprotons, 7 positrons, and 24 neutral particles. How many electrons are also emitted

A 0.75mol calcium carbonate (CaCO3) pellet has what mass?

The pH of the acid in the stomach is 2. When a person has heartburn, the acid in their stomach is coming up the esophagus (lower throat) and burning the lining of the esophagus. Why would a person take an Alka Seltzer tablet for heartburn?

Calculate the photon energy (in joules) for the light emitted from the hydrogen atom if ninitial = 4 and nfinal = 2.

The distance from one place to another

What is the purpose of a cell membrane