Why is the atomic mass of most elements not a whole number?

It is always feasible that a substance will dissolve in water when: A. Enthalpy is positive and entropy is negative. B. Enthalpy is negative and entropy is negative. C. Enthalpy is negative and entropy is positive. D.

In which of the following are the symbol and name for the ion given correctly A. NH4+: ammonia; H+: hydride B. C2H3O2-: acetate; C2O4-: oxalite C. OH-: hydroxide; O2-: oxide D. PO3 3-: phosphate; PO4 3-: phosphite

Which of the following is an interaction is responsible for the force of attraction between the particles in a salt crystal? A) proton-proton B) proton-electron C) neutron-electron D) electron-electron

A calorimeter weighing 123.7g has a quantity of 20C water added to it. The combined mass of the calorimeter + cold water is 198.3g. 61g of water is heated to 60C and is poured into the calorimeter.

What impact does the gulf stream have on NC coastal climate

Determine the number of moles 28.8 g Br2

Which statement best explains why heating a liquid affects its viscosity?

In which type of unconformity is the eroded rock tilted or folded? disconformity nonconformities angular unconformity scarp unconformity

What's the difference between an iconic bond and a covalent bond? A. an iconic bond Is a bond between charged atoms, while a covalent bond is a bond between neutral atoms B.

4. Given the chemical formulas of the following compounds, name each compound and state the rules applied to determine each name. Score • RbF • CuO • (NH4) 2C2O4 (Note: C2O4 - is called oxalate.)