it is 12.51 grams cause u just add them together
Answer:
When sugar is dissolved in water, the solution does not conduct electricity, because there are no ions in the solution. Some substances that are made of molecules form solutions that do conduct electricity. Ammonia is such a substance.
Answer:
B) P₂O₅
Explanation:
A) MgCl₂
Molar mass of Mg = 24
Molar mass of Cl = 35.5
Molar mass = 24 + 2×35.5 = 95 g/mol
B) P₂O₅
Molar mass of P = 31
Molar mass of O = 16
Molar mass = 31 ×2 + 5×16 = 142 g/mol
C) BaCl₂
Molar mass of Ba = 137.33
Molar mass of Cl = 35.5
Molar mass = 137.33 + 2×35.5 = 208.33 g/mol
D) AlCl₃
Molar mass of Al = 27
Molar mass of Cl = 35.5
Molar mass = 27 + 3×35.5 = 133.5
Scientific method consists of systematic observation, hypothesis, and experimentation of observation and hypothesis.
Explanation:
- Scientific method and steps can be explained by an example. Suppose you live in a sea side and in your house compound, you have a pond. You observe that during winter, pond freezes while the sea doesn't.
- You think about it and reach the hypothesis that it may be because sea water that is salty has a higher freezing point than pond water, which is fresh water.
- You experiment and prove your hypothesis by taking two cups of distilled water and pouring salt to one of it. You keep them in refrigerator and increase the freezing point. You see the distilled water cup getting frozen and the other cup is not because the salty water in it has a higher freezing point.
Look on page 293 of your textbooks to fact check.The symbol for an alpha particle is 4/2 He.The super- script (4) is the mass number (the sum of the numbers of protons and neutrons).The subscript (2) is the atomic number (the number of protons).
Therefore the answer should be: Super-script 4 is the mass number, Subscript 2 is the atomic number
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