Which of the following reactions is expected to have a positive

Refer to the following balanced equation: 3MgO(s) + 2 Fe(s)

The isotope decays by α-emission. What is the new nucleus that forms?

If a chemical reaction has

Calculate Eocell for the following balanced redox reaction in basic solution: 3Zn(s) + 2CrO42- + 8H2O

Consider the following correctly balanced redox reaction in acidic solution: 3 Sn4+ + 2 Au(s)

Maria was hospitalized due to a Covid-19 infection. On the second day of her admission, she received a blood plasma transfusion. Select the type of acquired immunity used to help Maria.

Refer to a reaction that has

Select the alternative that best describes situation(s) that involve IgE and mast-cell allergies.  

Consider the following reaction: CO2(g) + 2 HCl(g)