Bed rock is a layer underneath minerals
Answer: The answer is C
Explanation: Sound waves tend to spread farther the deeper the sound is, and the waves go lower then the second example, deeming it is louder.
Answers:
Atomic number = 63
Mass = 150.919 a.m.u
Nuclear symbol = ¹⁵¹Eu₆₃
Explanation:
Europium (Eu) is a member of lanthanide series in periodic table. these are radioactive elements that emits radiations continuously. these elements are also called rare earth element due to their rare existent.
Europium (Eu) has two naturally occurring isotopes as follow,
1) Eu¹⁵² with 52.19 % abundance.
2) Eu¹⁵¹ with 47.81 % abundance.
Answer:
8.757 x 10^23 molecules
Explanation:
Use Avogadro's number of 6.022
×
10
^23 molecules per mole.
64g CO2/44.01 g/mol = 1.454 moles of CO2
1.454 x 6.022
×
10
^23 =
8.757 x 10^23 molecules
