Organisms get the energy and building materials that they need from food. what is the ultimate source of energy for food?

If the entire solar system were about the size of a quarter (roughly 1" in diameter), approximately how far away would the nearest star be?

Magnesium phosphate reacts with sulfuric acid to form magnesium sulfate and phosphoric acid. what is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-numbered coefficients?

What is the name symbol and charge of an ion that contains 12 protons and 10 electrons?

Calcium metal (Ca) can be produced by passing an electric current through molten calcium chloride (CaCl2). Chlorine gas (Cl2) is also formed. What is the balanced equation for this reaction?

WiFi, which allows wireless access to the internet, uses which electromagnetic wave? A. Infared light B. Radio waves C. Ultraviolet light D. Microwaves

What is the number of moles of 27.6g of lithium?

Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L and a pressure of 25 psi. What is the new temperture.

Which of the following is a measure of randomness in a system? A) entropy. B) kinetic energy. C) potential energy. D) chemical energy.

What substance can be broken down by chemical means? A) ammonia B) aluminum C) antimony D) argon (Castle learning question)

How the law of conservation of mass could be useful for investigating chemical changes