Which type of elements are lanthanides and actinides part of?

inner transition metals

noble gases

halogens

metals

What effect does distance have on the force of gravity?

An oven is a technological system. which of the following describes an input into this system

The chemical messengers released into the spatial junctions between neurons are called

In liquid water, an equilibrium exists between H2O (ℓ) molecules, H + (aq) ions, and OH - (aq) ions. A person experiencing acid indigestion after drinking tomato juice can ingest milk of magnesia to reduce the acidity of the stomach contents.

A student is asked to make 500 mL of a buffer solution for an upcoming laboratory investigation that requires 50.0 mL of 3.0 M phosphoric acid. The student searches the acid cabinet in the stockroom but can only find 4.5 M phosphoric acid.

A 25.00 g solid sample of Ca (OH) 2 was added into 1250 mL of 0.400 M HCl aqueous solution. The temperature of the solution was decreased from 36.6oC to 20.0oC. Assuming Ccal of the reaction is 5.225 kJ/oC, how much heat is involved in the reaction?

Why isn't a largest predator just at the top of a food web?

What is the electrical charge of a cation? A. zero B. positive C. negative

You measure the mass of a model car to be 230 grams. The actual mass is 218 grams. what is your percent error

One canned juice drink is 15% orange juice; another is 5% orange juice. How many liters of each should be mixed together in order to get 10L that is 11% orange juice? ... ?