Answer:
Calibration curves are used to understand the instrumental response to an analyte, and to predict the concentration of analyte in a sample.
The correct answer is C. Noble gases. Good luck!
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Answer:
Four.
Explanation:
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In this case, according to the given chemical reaction:

Thus, since the reactants side (left) has three hydrogens in ammonia and one hydrogen in hydrochloric acid, we infer it has four hydrogen atoms at this side. Moreover, products side (right) has 4 hydrogen atoms as well, which means that the law of mass action is respected.
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Answer:
HETEROTROPHIC
Explanation:
Based on nutrition, organisms are classified into autotrophic and heterotrophic. Autotrophic organisms are organisms that are capable of making their own food using either light source (photosynthesis) e.g plants or chemical source (chemosynthesis) e.g some bacteria.
Contrarily, HETEROTROPHIC organisms are those that are unable to synthesize their own food themselves, hence, they rely on other organisms for their energy source. Types of heterotrophism include; saprophytism, predation etc. Most bacteria falls under this heterotrophic category because they are unable to make their own food.
Answer:
the answer is 3(decay) and
the second isa 1(alfa particle) has a mass of equal to helium nucleus