A reaction occurs via the following sequence of elementary steps. What is the rate law based on this reaction mechanism? step 1: A + B → 2C + D (slow) step 2: C → E (fast) step 3: D → 2F (fast)

rate = l[A][B]

Explanation:

We are given the information that step 1:  A + B → 2C + D is the the rate determinng steps, while the other 2 are fast in the reaction mechanism.

The rate law which is what we need to determine in this question is dependent on the  the slowest step,  

Therefore, the rate law will be a second order overall and dependent on the concentrations of A and B:

rate = k [A][B]

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms