Select the true statements.

A) BF 3 has a trigonal planar shape.
B) Molecules with three outer atoms always have a trigonal planar shape.
C) NH 3 has a trigonal planar shape.
D) Trigonal planar molecules have three regions of high-electron density around the central at

A) and D)

Explanation:

A) BF 3 has a trigonal planar shape

TRUE.

BF₃ has three bonding pairs and no lone pairs. According to VSEPR theory, it is an AX₃ molecule with trigonal planar geometry.

B) Molecules with three outer atoms always have a trigonal planar shape.

False

NH₃ has three outer atoms but a trigonal pyramidal shape.  

C) NH₃ has a trigonal planar shape

False.

NH₃ has three bonding pairs and one lone pair. According to VSEPR theory, it is an AX₃E molecule with trigonal bipyramidal geometry.

D) Trigonal planar molecules have three regions of high-electron density around the central atom

TRUE

The regions of high-electron density are the three bonding pairs.

1.consider the following balanced equation and answer parts a through. show calculations for each part.  

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)  

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.  

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3  

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.  

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.  

explanation:

answeridentity;