Why do scientists use models? a. models make some things easier to understand. b. measurements can be made only on models. c. models scientists visualize things they can’t see. d. models are perfectly accurate representations of objects. e. scientists can analyze models to make predictions.

Option (c) is the correct answer.

Explanation:

A model is a mode of representation with the help of which we can make things easy to visualize for own self and for others also.

For example, a model of boat structure of glucose will help to visualize how the atoms are bonding together and repelling due to difference in their size.

Hence, scientists also get benefited with the help of models as they also get to know how they need to explain or correct things in their research.

Thus, we can conclude that scientists use models because Models help scientists visualize things they can’t see.

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:

it would be a gas formation