What's a wind up toy useful energy output

Heavy elements such as aluminum and carbon were formed by which of these phenomena? A. Big bang B. Fusion in very large star C. Fusion in small star D. Supernova

Why doesn't gallium hydrogen sulphate have roman numerals

When does the given chemical system reach dynamic equilibrium?

A stream of air (21 mole% o2, the rest n2) flowing at a rate of 10.0 kg/h is mixed with a stream of co2. the co2 enters the mixer at a rate of 20:0 m3/h at 150°c and 1.5 bar. what is the mole percent of co2 in the product stream?

An ion with six protons, seven neutrons, and a charge of 2 + has an atomic number of

How many protons are in an ion with 54 electrons and a - 1 charge?

Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed? A. Less than 1% of the alpha particles went un-deflected through the gold foil. B.

Ionization involves completely removing an electron from an atom. light of a particular wavelength can cause ionization to occur if it has the required energy. the energy to ionize a certain element is 342 kj/mol.

How many molecules are contained in a 7.20-g sample of dimethylmercury?

Could a nuecles of more than one proton but no nuetron exist? Explain