HEEELLP WILL GIVE 100 PIINTS ASAP How many protons does an ion have if that ion has a charge of -2 and an electron configuration of 1s22s22p63s3p6??
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Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?