What metals and nonmetals are in a backpack

A 100g scoop of ice cream has an energy value of 775,000 joules. This amount of joules in calories is approximately

Which element has the most favorable (most negative) electron affinity? C N B Li?

How do you know if a reacion is exothermic?

What is true for the following reaction? Ca (s) + 2C (s) CaC2 (s) + 62.8 kJ It is an endothermic reaction and ∆H = + 62.8 kJ. It is an endothermic reaction and ∆H = - 62.8 kJ. It is an exothermic reaction and ∆H = + 62.8 kJ.

Give an example of an element of an element and explain what the element

A gas occupies a 1.5 L container at 25 degrees Celsius and 2.0 atm. If the gas is transferred to a 3.0 L container at the same temperature, what will be its new pressure? a) 3.0 atm b) 2.0 atm c) 1.0 atm d) 4.0 atm

The maximum amount of n2h4 (hydrazine) that can be prepared from 14 grams of nitrogen and 28 grams of hydrogen by the reaction n2 + 2 h2 = n2h4 is?

The molecules of a substance are moving rapidly in a container. The molecules do not interact with each other. If the container is opened, the molecules will escape from the container.

Why is fluorine a gas?

What is the empirical formula for a compound if a sample contains 3.72g of p and 21.28g of cl?-pcl5-pcl3-p2cl10-p2cl5