Answer:
2Cu + S ~~~> Cu2S Copper (C) reacts with sulfur (S) to form copper sulfide as shown in the equation. A scientist adds 12.7 grams of Cu to 3.2 grams of S to start the reaction.
Explanation:
43.8 has 3 significant figures and 1 decimal.
<h3 /><h3>What are significant figures?</h3>
The term significant figures refer to the number of important single digits (0 through 9 inclusive) in the coefficient of an expression in scientific notation.
All zeros that occur between any two non-zero digits are significant. For example, 108.0097 contains seven significant digits. All zeros that are on the right of a decimal point and also to the left of a non-zero digit are never significant. For example, 0.00798 contained three significant digits.
Hence, 43.8 has 3 significant figures and 1 decimal.
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Answer:
The number of moles: 0.25442 moles
Explanation:
One mole of Neon gas will occupy 22.4 at STP.
5.699L consists of = 0.25442 moles.
We shall consider V, the volume and T, the temperature.
According to Boyle's Laws:
In our case:
<h2>b is the correct answer</h2>
according In my course I studying it all