Empirical formula of a compound is the formula showing the simplest whole number ratio of the atoms of elements present in the compound. It is the actual representation of whole number ratio between the elements in the compound. In this case, C2N2H8 is not an empirical formula simply because the ratio of the elements (2:2:8) is not the simplest ratio and could still be simplified further to a simpler ratio (1:1:4). Hence, the correct answer is A
Mass divided by Volume
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Density
Answer:
A. It is exothermic
Explanation:
Combustion is a chemical reaction in which a substance combines with oxygen present in air to produce carbon (iv) oxide and water as well release heat and light energy.Combustion is an exothermic process.
An exothermic reaction releases energy in the form of heat to the surroundings. The energy required to break bonds in the reactants is less than the energy required to form new bonds in the products in an exothermic reaction.
From the given options;
A. It is exothermic is determinable since the reaction is a combustion reaction
B. The bond making energy is more than 600 kJ is not certain because the mass of the wood being burnt is not given. Also, wood is not composed of a specific element that would be taking part in the reaction, rather it is composed of various substances.
C. It is endothermic. is wrong because combustion of wood is exothermic.
D. The bond breaking energy is more than 600 kJ is not certain because the mass of the wood being burnt is not given. Also, wood is not composed of a specific element that would be taking part in the reaction, rather is composed of many substances.
Answer:
The correct answer is 101 feet.
Explanation:
To solve this problem, we need to remember the rules of significant figures. Any digit that is not zero is significant, and any zero is significant if it is between two non-zero digits or a trailing zero after the decimal point. Now, let's apply these rules to the options that are given:
1000 yards - Since the zeros are not after the decimal point or between two other digits, they are not significant. This means the only significant digit is 1, so there is only 1 significant digit.
1014 miles - All three of the non-zero digits are significant, and the 0 is significant in this case because it is between two other significant digits. Therefore, this number has 4 significant digits.
101 feet - The two 1's are significant because they are non-zero digits, and the zero is also significant because it is between the two 1's. Therefore, this number has 3 significant digits.
Thus, your answer is 101 feet.
Hope this helps!
Dry finish of powder coating avoid drips and runs
<u>Explanation: </u>
- The powder coating is a dry finish. It has a very thick finish which gives greater protection to the equipment.
- The powder coating is very durable.
- If we want perfect dry finishing then powder coating is the best option.
- This dry finish feature avoids drips and runs.
- Powder coating gives more safety than liquid paint.
- Liquid paint has acetone which causes respiratory problems.
- Powder coating is available in all colors and textures.