Na and Cl together form the compound
NaCl2
Answer:
D: a new substance
Explanation:
Chemical reaction
A change in matter that produces on or more new substances
HM, I think the answer would be D. This is just a guess, so please use it if ou want to answer D it's ok :D
1) You need to get volume of both temperatures by using first attached formula V= Mass/Density
2) Using the second formula you get the height of 0 degree
(radius in cm is
3) Then with h1 you can easily get the height of 25 degrees
Subtract 943.5 cm - 939.2 cm, and obtain a rise in mercury height of 4.3 cm
Answer:
Magnitude
Explanation:
Astronomers define star brightness in terms of magnitude (how bright the star appears from Earth)