BaCl2 (aq) + Na2CO3 (aq) BaCO3 (s) + NaCl (aq

Which coefficient should be placed in front of NaCl to balance this equation?

1

2

3

4

An atom of an element has 28 innermost electrons and 7 outermost electrons. In which period of the Periodic Table is this element located? 1. 5 2. 2 3. 3 4. 4

The temperature danger zone is:* A) 41 degrees to 140 degrees B) 41 degrees to 130 degrees C) 40 degrees to 140 degrees D) 10 degrees to 32 degrees

What coefficients are needed to balance the equation for the complete combustion of methane? Enter the coefficients in the order CH4CH4, O2O2, CO2CO2, and H2OH2O, respectively. Express your answer as four integers, separated by

What factor can limit the buffering capacity of a molecule?

If a cell is isotonic with a 0.88% nacl solution, how would an extracellular fluid with 1% nacl affect the cell?

How many moles are in 12.5 g of H2O

Substance which allows energy to pass through it

How are insect wings not likely to be fossilized?

True or False: A Solar eclipse occurs when Earth casts a shadow on the Moon.

Compared to a phosphorus atom, a P3 - ion has (1) more electrons and a larger radius (2) more electrons and a smaller radius (3) fewer electrons and a larger radius (4) fewer electrons and a smaller radius