Hold a rag with the hand that is picking up the spoon.
Answer: One mol of NaCl (6.02 x1023 formulas) has a mass of 58.44 g.
To go from grams to moles, divide the grams by the molar mass. 600 g58.443 g/mol = 10.27 mol of NaCl.
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Explanation:
Answer:
Explanation:
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In this case, we consider the given reaction to realize there is a 5:4 mole ratio between oxygen and nitrogen monoxide; thus, we infer that, at STP conditions, such mole ratio is eligible as a volume ratio too; therefore, the produced liters of nitrogen monoxide gas is:
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Answer:
E) None of these
Explanation:
For this question, we must remember the definition of a <u>chiral carbon</u>. In the chiral carbons, we have <u>four different groups</u> around the carbon.
So, an achiral molecule would be a molecule that does not have chiral carbons. That is, in an achiral molecule in all carbons we have at least one repeating group.
In all the molecules, which we have in the question, we have absolute configuration. That is, we have chiral carbons. In molecule A we have two chiral carbons (R and R), in molecule b we have two chiral carbons (R and S), in molecule c we have two chiral carbons (S and S) and in molecule d we have two chiral carbons (R and S). <u>Therefore in all molecules, we have chiral carbons.
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Now, if we analyze molecules a and c, we have a <u>plane of symmetry</u>. If we have a plane of symmetry, even though there are chiral carbons, there will be <u>no optical activity</u>. That is, these molecules do not have the ability to deflect polarized light despite having chiral carbons. Therefore molecules a and c are <u>meso compounds</u>.
<em>But optical activity is not related to chirality.</em>
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See figure 1 to further explanations
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