Technetium-104 has a half life of 18.0 minutes. how much of a 165.0 g sample remains after 90.0 minutes?

Is glass homogenous or heterogenous

How does the enengry of a eletron change when the eletron moves closer to the nuclues

For each of the following numbers, determine the number of significant figures it contains, rewrite it without using scientific notation, and determine the number of significant figures in the result. (a) 3.050 x 10^-4, (b) 4.3200 x 10^2, (c) 8.

1 scientific law and 1 scientific theory?

One of the following is not recommended for use of greenhouse crop fertilizer during the months of December through February the material is A. Ammonium sulfate B. Calcium nitrate C. Potassium nitrate D. monocalcium phosphate

What does aluminum hydroxide and calcium sulfate produce

Balnce the following molecular equation and write net ionic equation NaOH+H2SO4-Na2SO4+H2

Describe in words the reaction represented by the equation and include a description of the composition of each kind of molecule 2h2+02=2h20

Potassium chloride, kcl, sodium sulfate, na2so4, glucose, c6h12o6, carbon dioxide, co2 and ammonium phosphate, (nh4) 3po4, are soluble in water.

Use the periodic table to select the element from the drop-down menu that has the correct relative electronegativity.