Given 1.00 grams of each of the following radioisotopes, Ca-37, U-238, P-32 and Rn-222, which would have the least remaining original isotopes after 100 years?

1) Ca-37

2) U-238

3) P-32

4) Rn-222

Compare and contrast nuclear reactions and chemical reactions

How many joules of heat are absorbed when 1000g of water is heated from 18Celsius to 85celsius?

Which element is placed in the same period as ruthenium but has a higher atomic number than it? bismuth osmium silver zirconium

How many moles of sulfur atoms are in 9.9 moles of Ag2S

1. Given the following balanced equation: Mg + CuCl2 → MgCl2 + Cu Calculate the amount of copper produced beginning with 100g of Mg and 200 g of CuCl2 and identify the limiting reactant.

True or False: According to the present atomic theory, the location of an electron in an atom is best represented by a probability cloud.

How can we measure the density of different wooden objects

According to molecular orbital theory, all diatomic molecules with an even number of electrons will be diamagnetic. True or False?

Which of the following equilibria would be impacted by a change in pressure? Select the correct answer below: H2 (g) + I2 (g) →2HI (g) NO (g) + O3 (g) →NO2 (g) + O2 (g) 2SO3 (g) →2SO2 (g) + O2 (g) CO (g) + H2O (g) →CO2 (g) + H2

A common stain remover is sold in concentrated form as 3M sodium hypochlorite (NaOCl). You need to create 400 milliliters of a 0.5M solution of sodium hypochlorite to fill a spray bottle. What volume of 3M sodium hypochlorite is needed? 15.0 mL 66.