Which of the following reactions is balanced?
O A. CaCl2 + 2H2CO3 → Cacoz + HCI
O B. CaCl2 + H2CO3 → 2CaCO3 + HCI
O C. CaCl2 + H2CO3 -> CaCo3 + HCI
O D. CaCl2 + H2CO3 → CaCo3 + 2HCI

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

What is the mass of 4 molecules of co2