Question

MgO + B2O3 = ? Cr + H2O = ?

Answer 1

3MgO + B₂O₃ -> Mg₃(BO₃)₂
2Cr + 3H₂O -> Cr₂O₃ + 3H₂

Answer 2

Reaction 1: MgO + B2O3 = ?

The reaction between magnesium oxide (MgO) and boron trioxide (B2O3) can be represented as follows:

MgO + B2O3 → Mg(BO2)2

In this reaction, magnesium oxide reacts with boron trioxide to form magnesium borate, which is represented by the chemical formula Mg(BO2)2.

Please note that the reaction equation provided is based on the information available from the search results.

Reaction 2: Cr + H2O = ?

The reaction between chromium (Cr) and water (H2O) can be represented as follows:

Cr + H2O → Cr(OH)3 + H2

In this reaction, chromium reacts with water to form chromium(III) hydroxide and hydrogen gas. The chemical formula for chromium(III) hydroxide is Cr(OH)3.

Please note that the reaction equation provided is based on the information available from the search results. I hope this helps! Let me know if you have any further questions.