What is the mass number of an atom which contains 21 electrons, 21 protons, and 24 neutrons?

Identify the topics that are included in the science of geology

The gram formula mass of a compound is 48 grams. The mass of 1.0 moles of this compound is (1) 1.0g (2) 4.8g (3) 48.0g (4) 480g

How many grams of NaCl are in a 388.5g sample of a 1.25% (m/m) NaCl solution?

How many unpaired electrons does a ground-state phosphorus atom have?

When the argon and fluorine reach the same temperature they are both liquid. For the physical system of argon and fluorine what energy systems change from when you add the fluorine to when the temperatures equilibrate?

Watch It! #3 After watching the examples in the video of radiation, list 2 other examples that you come up with on your own.

Tear gas has the composition 40.25% carbon, 6.19% hydrogen, 8.94% oxygen, 44.62% bromine. what is the empirical formula of this compound?

Explain why ships traveling from east to west across the Atlantic take days longer than ships traveling the same distance from west to east.

In a titration 25.0 ml of a. 20 M NaOH solution is used to neutralize 10.0 ml of HCl. Write the equation for this neutralization reaction and calculate the molarity of the acid.

4*C: 4cm 8*C: 10cm 12*C: 14cm 16*C: 18cm 20*C:24cm 24*C: 12cm what is the independent variable, dependent variable and three constant variables?