Answer:
Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. A scratch test developed by a German mineralogist Friedrich Mohs in 1822 is used to determine mineral hardness.
Answer:
B. CH₅N
Explanation:
The combustion reaction of a compound CₐHₓNₙ with O₂ is:
CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂
Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂
Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:
Moles CO₂ (Molar mass 44g/mol):
44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C
Mole of H₂O (Molar mass 18g/mol):
45g ₓ (1 mol / 18g) = 2.5 moles H₂O = 5 moles H
Thus, in the compound you have 5 moles of H per mole of C, and a possible empirical formula is:
B. CH₅N
The only structure that meet this C:H ratio
These listed below would best help an athlete be successful in strategy training. Attitude is main strategy which can determine how much you can achieve.
Time of training should be for approx. 45-60 minutes to improve fitness.
To overcome the failures and to achieve goals, it is essential to have a person compelling vision. A lot of athletes achieve success after failures due to their vision. They have a dream which motivates them to perform better.
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Which person is known as athlete?</h3>
A person who is expert in sports and other forms of physical exercise.
Athlete should set goals which is considered to be the first step in the process of achieving success. Goals keep successful athletes motivated in the ground while playing.
For more details regarding, athlete training, visit:
brainly.com/question/3524635
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Answer:
Villa of Green Happiness.
Explanation: