Look at the following chemical equation. 2 As + 6 NaOH → 2 Na3AsO3 + 2 H2

Is this a balanced chemical equation?

A. No, because the reactants contain more hydrogen (H) atoms than the products
B. No, because the reactants contain more oxygen (O) atoms than the products
C. Yes, because the mass of the reactants is equal to the mass of the products
D. Yes, because the reactants contain the same number of arsenic (As) atoms as the products

I understand that it indeed isn't but the answer choices are confusing me.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

the correct answer to this question is 2