Answer:
mass no = A
Atomic number = Z= no of protons
Neutron = n
n = A-Z
n= 35- 17
= 18
Explanation:
The answer is remain the same.If the rock is cut, crushed, or heated, the length of the half life of the uranium would remain the same since these factors have no effect on half-life.Even though chemical changes were affected by temperature, the physical state, pressure, concentration, the chemical environment within the molecule, and any other changing factors, the half-life of a radioactive substance is independent of these influences.
Answer:1.188
⋅
10
5
1.188 Times 10 to the fifth power
Explanation:
To help you answer this question, you can search a sample reaction in the internet for hydroboration-oxidation. Take a look at the attached picture. The sample reaction is shown at the top. We can deduce that the original compound must be an alkene. Following the pattern, compound a must be 2-methylbutene as shown in the picture.
0.01068g
Explanation:
Given parameters :
Number of atoms = 5.34 x 10²⁰ atoms
Molar mass of carbon = 12g
Unknown:
Mass of carbon = ?
Solution:
A mole of a substance is unit that contains the Avogadro's number of particles.
1 mole = 6.02 x 10²³ atoms ;
In 5.34 x 10²⁰ ;
Number of moles =
= 8.9 x 10⁻⁴moles
Mass = number of moles x molar mass = 8.9 x 10⁻⁴ x 12 = 0.01068g
learn more:
Molar mass brainly.com/question/2861244
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