(191.0 x 37.39) +(193.0 x62.42)
———————————————-
37.39+62.42
= 192.25 (2dp)
<span>The concentration of the reactant decreases as it is consumed.</span>
Answer: The correct statement is the liquid solution might have been dangerous to touch with bare hands.
Explanation:
In the question, it is given that Ari has wiped the spilled liquid with paper towels without putting on the gloves.
While working in a lab, one must follow some safety rules:
- There are chemicals all around the lab, so it should be handled with care that is by wearing gloves.
- If by chance there is spilling on liquid on the shelf, it should be cleaned with the help of paper towels while wearing gloves.
- Any chemical must not be touched with bare hands.
Hence, the correct answer is the liquid solution might have been dangerous to touch with bare hands.
The lac repressor protein binds to the operator when it is active. The lac repressor is a protein or a DNA-bounding protein as it is called. The lac repressor also involves the lactose metabolism and it is also responsible for the transcription of three lac genes.
The amount of oxygen needed would be 80.19 grams
<h3>Stoichiometric problems</h3>
From the equation of the reaction:
The mole ratio of oxygen and ammonia is 3:4
Mole of 56.8g ammonia = 56.8/17 = 3.34 moles
Equivalent mole of oxygen = 3/4 x 3.34 = 2.5059 moles
Mass of 2.5059 moles oxygen = 2.5059 x 32 = 80.19 grams
More on stoichiometric problems can be found here: brainly.com/question/15047541
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