Which of the following compounds is a covalent (i. e., molecular) compound?

A. Na2CO3

B. NaOH

C. C2H4O2

D. MgBr2

Convert to moles: show work 1. 6.6g (NH4) 2SO4 2. 4.5kg Ca (OH) 2 3. 25g CaO 4. 25g Fe (NO3) 3. 6H2O 5. 25g K2CrO4

Would the following errors increase, decrease, or have no effect on the calculated moles of gas collected in the experiment? Explain your answers in complete sentences. a) The measured mass of the magnesium was smaller than the true mass.

What state of matter is fire?

What is the definition of planetary differentiation? mixing of materials to produce a new compound divisions of planets based on constituent materials separation of materials based on density categorization based on chemical formula?

How can we test whether a substance is a metal or a non-metal

How mant atoms are in 3N2

The type of nuclear decay an unstable nucleus will undergo depends on its ratio of neutrons to protons. The radioisotope cobalt-65 has a ratio of neutrons to protons of 1.41, which is too high for a nucleus of this size.

1.87 $/gal to dollars per liter, Express your answer using three significant figures.

What can a student do to increase the force of attraction of a magnet on an iron block?

Which elements can react to produce a molecular compound?