Hello, in this context regarding the decomposition of phosphorus pentachloride: Considering the equilibrium constant is given, along with the initial concentration of phosphorus pentachloride, we can establish the law of mass action. To analyze the changes in concentration and the equilibrium state, an ICE table will be used. This will lead us to determine the equilibrium concentration of phosphorus pentachloride, which will ultimately allow us to compute the percent decomposition. Best regards.
Answer:
1. Ionic compound- 
2. Polar molecular compound- 
Explanation:
Magnesium (Mg), with atomic number 12, has an electron configuration of 
. The outermost shell possesses 2 electrons, thus it loses these 2 electrons to become 
ions. Bromine (Br), a nonmetal with atomic number 35, has an electron configuration of 
. Its outermost shell holds 7 electrons, allowing it to accept one electron and thus forms 
. Hence, the magnesium ion and bromide ion bond together to form an ionic compound .
Phosphorus (P), also a nonmetal, bonds with bromine covalently. Due to differing electronegativities, they produce polar covalent compounds like .
To accomplish this, we must first understand the rules of significant figures.
<span>Rule #1: All digits other than zero are considered significant. (1234)
Rule #2: Leading zeros do not count as significant. (0.093)
Rule #3: Zeros situated between non-zero digits are significant. (78309)
Rule #4: Trailing zeros are significant only if there is a decimal point. (0.05470)
Therefore, considering these rules, 56.0g contains three significant figures due to the decimal point.
0.0004m has just one significant figure per Rule #2.
1003ml contains 4 significant figures because the zeros are between two significant digits.
Lastly, 0.0350s has 3 significant figures because digits following a decimal point are counted.
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To determine the mass of the lead piece, we use the following equation: Q(heat) = mC delta T, where Q equals 78.0 j, M is the mass we want to find, C is the specific heat capacity (0.130 j/g/C), and delta T shows the temperature difference, set at 9.0 c. Rearranging the formula to solve for M gives us M = Q / c delta T. By substituting in the values, we conclude that M = 78.0 j / (0.130 j/g/C * 9.0 C), calculating this gives us a mass of 66.7 g of lead.
Answer:
evaporated
Explanation:
Once the solution evaporates, only salt will remain, as the sole other component in the solution is water.
