If carbon has 6 neutrons how many protons does it have

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

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 many grams of phosphorus are contained in 5.09 moles of phosphorus?