Which observation is illustrates the law of conservation mass

A certain chemical reaction releases 362. kj of heat energy per mole of reactant consumed. Suppose some moles of the reactant are put into a calorimeter (a device for measuring heat flow). It takes 4.

Differentitate reversible and irreversible process

How to measure mass of unknown metal using only graduated cylinder, dropper, dish, ruler funnel, and scoopula?

Which of the following describes the contribution of Eratosthenes? A. discovery of the geocentric theory B. discovery of a mathematical formula to relate the sides of a right triangle C.

4NH3 (g) + 502 (g) - >6H20g) + 4NOg) What is the enthalpy change for this reaction?

For a neutral Nitrogen, how many electrons are in the 2p electron orbitals?

A neutral atom has an atomic number of 20 and a mass number of 41; how many protons, neutrons, and electrons are found within the atom?

Which of the following are dwarf planets Ceres Nama is Eris Charon Haumea Makemake Pluto

Which set of factors changes igneous or sedimentary rock into metamorphic rock? heat and weathering water and weathering heat and pressure water and pressure

What is the standard cell potential (E°cell) for the voltaic cell based on the reaction below? Sn2 + (aq) + 2Fe3 + (aq) → 2Fe2 + (aq) + Sn4 + (aq)