Which of the following reaction represents a combustion reaction? O C3H8 (9) + O2 (g) - CO2 (g) + H2O (9)
O HF (aq) + NaOH (aq)
+
NaF (aq) + H20 (1)
O CaBr2 (aq) + AgNO3 (aq) – AgBr (s) + Ca(NO3)2 (aq)
O Ba (s) + H2O (1) - Ba(OH)2 (aq) + H2 (g)

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

How can a mixture of salt water be separated into salt and water