What is the half life of an isotope that is 75% decayed after 16 days?

When 5 grams of salt dissolve in 30 grams of water, what is the resulting mass of the mixture?

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L. If the temperature changes to 70 ∘C, and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

Ayala is making salad dressing. She mixes oil and vinegar in a blender until a smooth consistency is formed. Explain whether this is a heterogeneous or a homogeneous mixture and why.

9. Given the following balanced chemical equation, 6NaOH + 3Cl2 - NaClO3 + 5NaCl + 3H20 how many moles of NaCl can be formed if 6mol of NaOH were to react?

when you cook food like eggs or potatoes this is a chemical change when candle burns the wick of the candle and wax turn into nothing first put you thoughts for information and then do agree it depends or disagree explain why and how you got the

What is the relative charge carried by an electron

Which term best describes the type of bonding in magnesium chloride

This equation indicates that the reaction gives off heat. What is this type of reaction called? 2C4H10 + ? O2? 8CO2 + 10H2O + heat a. an exothermic reaction b. an endothermic reaction c. absorption reaction d. precipitation reaction

Given the balanced equation representing a reaction: C3H8 (g) + 5O2 (g) = = >3CO2 (g) + 4H2O (g) What is the total number of moles of O2 (g) required for the complete combustion of 1.5 moles of C3H8 (g) ? (1) 0.30 mol (3) 4.5 mol (2) 1.5 mol (4) 7.

What increases in equal steps of one from left to right in the Periodic Table for the elements lithium to neon?