Answer:select and control A. interpreting the results
Explanation:
Control group: 50 dogs continuing their normal diet
Experiments group: 50 dogs chosen to eat the new food
Independent variable: dog food
Dependent variable: the dogs’ weight
Answer:
Types of Potential Energy
Elastic Potential Energy. Anything that can act like a spring or a rubber band can have elastic potential energy. ...
Gravitational Potential Energy. There is a constant attractive force between the Earth and everything surrounding it, due to gravity. ...
Chemical Potential Energy.
(IF THIS HELPED CAN YOU PLEASE GIVE ME A BRAINYLEST?)
Answer:
29.44 grams
Explanation:
Molar Mass of NH2NO3 = Molar Mass of Nitrogen + 2(Molar Mass of Hydrogen) + Molar Mass of Nitrogen + 3(Molar Mass of Oxygen)
Molar Mass of NH2NO3 = 14 + 2(1) + 14 + 3(16) = 78 grams
Mass of Nitrogen in NH2NO3 = 14 + 14 = 28 grams
Percentage by mass of Nitrogen in NH2NO3 = ![\frac{28}{78} \times 100\% =35.90 \%](https://tex.z-dn.net/?f=%5Cfrac%7B28%7D%7B78%7D%20%5Ctimes%20100%5C%25%20%3D35.90%20%5C%25)
This means, the percentage of Nitrogen in NH2NO3 is 35.90%. So the amount of Nitrogen in 82 g of NH2NO3 will be 35.90% of 82
35.90% of 82 = 0.359 x 82 = 29.44 grams.
Thus, 29.44 grams of Nitrogen will be present in 82 grams of NH2NO3