Which of the following chemical reactions will produce a precipitate?

A.3 KBr + AIPO4 → K3PO4 + AlBr3
B. ZnCl2 + Mg2SO4 → ZnSO4 + MgCl2
C. Na2CO3 + CaCl2 → CaCO3 + 2NaCl
D. NH4OH + KCI — KOH + NH4CI

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth