A particular nuclide has a mass number of 21 and contains 11 neutrons. What element is it? a. hydrogen b. neon c. sodium d. scandium

Write the net ionic reaction that occurs upon the addition of hno3 to a solution which contains methylamine (ch3nh2) and methylammonium chloride (ch3nh3cl). (be sure to include states of matter.)

Describe a way to determine whether a substance conducts electricity

Which of these might a scientist do as part of the scientific process? a. Observe the natural world b. Answer ethical questions c. Hide experimental data d. Make unsupported claims

How many kJ are required to melt 100 grams of water?

Which balanced equation represents a chemical change? (1) H2O (l) + energy → H2O (g) (2) 2H2O (l) + energy → 2H2 (g) + O2 (g) (3) H2O (l) → H2O (s) + energy (4) H2O (g) → H2O (l) + energy

When magma intrudes parallel to another rock layer, the formation is called a (n) A. sill. B. dike. C. extrusion. D. unconformity.

What is the net amount of energy released when 1 mole of H2O is produced

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.