Answer:A hypothesis is a conjecture, based on knowledge obtained while seeking answers to the question
Explanation:
he process of the scientific method involves making conjectures (hypotheses), deriving predictions from them as logical consequences, and then carrying out experiments or empirical observations based on those predictions.
You can differentiate between ionic, covalent and molecular compounds by the fact that ionic compounds contain elements that include both a metal and a nonmetal. Molecular compounds contain both non metals covalently bonded to each other. While acids most often on their chemical formula start with the element of Hydrogen - H.
For Eg - sulphuric acid
H2SO4
hydrochloric acid - HCl.
Answer:
The correct answer to the following question will be "4.08 × 10⁻¹⁹ Joule".
Explanation:
Given:
Wavelength, λ = 486.0 nm
As we know,
![E=h\upsilon =\frac{hc}{\lambda}](https://tex.z-dn.net/?f=E%3Dh%5Cupsilon%20%3D%5Cfrac%7Bhc%7D%7B%5Clambda%7D)
On putting the estimated values, we get
⇒ ![=\frac{1241.5 \ ev\ nm}{486 \ nm}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1241.5%20%5C%20ev%5C%20nm%7D%7B486%20%5C%20nm%7D)
⇒ ![=2.554 \ ev](https://tex.z-dn.net/?f=%3D2.554%20%5C%20ev)
∴ 1 ev = 1.6 × 10⁻¹⁹ J
Now,
Energy, ![E=2.554\times 1.6\times 10^{-19}](https://tex.z-dn.net/?f=E%3D2.554%5Ctimes%201.6%5Ctimes%2010%5E%7B-19%7D)
⇒ ![=4.08\times 10^{-19} Joule](https://tex.z-dn.net/?f=%3D4.08%5Ctimes%2010%5E%7B-19%7D%20Joule)
Answer:
746 moles of H2O are been produced from 373 moles of Al.
Explanation:
For every 3 moles of aluminum, you get 6 moles of H2O (double). Therefore, every 373 moles of Al, you will get double as well, that is 746 m.
Answer:
it goes to a solid to a liquid
Explanation:
When something is a solid the molecules are impact together and have a small sense of vibration. But as the solid melts away for example ice, the molecules become more loose forming into a liquid