Which of th following is an example of how scientist might use a model?
a. a hammer is used t...
Chemistry, 21.12.2019 12:31 whitethunder05
Which of th following is an example of how scientist might use a model?
a. a hammer is used to nail two boards together
b. a timer is used to measure the amount of time the cake is in the oven
c. marbles placed inside a hollow sphere are used to describe protons in a nucleus
d. a magnifying glass is used to look at a ladybug
Answers: 3
Chemistry, 23.06.2019 05:30
Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?
Answers: 1
Chemistry, 23.06.2019 10:20
El amoniaco y el fluor reaccionan para formar tetrafluoruro de dinitrogeno y fluoruro de hidrogeno. segun la reaccion: nh3 + f2 ⇒ n2f4 + hf si reaccionan 5 gramos de amoniaco y 20 gramos de fuor, ¿cuantos gramos de fluoruro de hidrogeno se producen?
Answers: 2
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