Answer : (C) It can be used for variety of activities and 4es
Explanation: A private land is generally used for any purpose like home, business, office, factories or any other purpose. The land is privately owned by its owner which can use the private land for variety of activities the owner wants. A private land can be used as a farm land, or any other non agriculture purpose like building a factory, converting into home or any other purpose.
Answer:
8.4) 27.1 cm³
8.5) 0.217 mol/dm³
Explanation:
Please see attached picture for full solution.
8.4) Since the results from titrations 3-5 are within 0.10cm³ from each other, these 3 results are concordant.
8.5) Find mol of sulfuric acid to find mol of NaOH using mole ratio. Equation has already been balanced for you, so mole ratio of NaOH to H2S04 is 2:1. To find concentration of NaOH, divide the number of moles by the volume in dm³ since the units for concentration is mol/dm³, which you can think of as the number of moles of NaOH in a dm³ of solution.
1 dm³ = 1000cm³
Thus, 1cm³= 1/1000 dm³
1. Formula: C2H4
The formula for covalent compound is C2H4 is because there is 2 carbon atoms, and 4 hydrogen atoms.
Name: Ethylene
The naming of Ethylene: the system of hydrocarbon nomenclature was proposed by August Wilhelm von Hofmann in which the suffixes ane, ene, ine, one, and une are used to distinguish the hydro carbons with 0, 2 ,4 ,6 , and 8 lesser hydrogens than their parent alkane. Our chemical formula has 2 carbon atoms so we use the prefix of ethane, eth, and ene as our suffix due to the hydrogren.
2. Name: Carbon Monoxide
Naming: You don't name the first element with mono but rather the 2nd element and add ide as the suffix since it is an anion.
3. Formula: N2S5
There are 2 nitrogen atoms and 5 sulfide atoms. Hence, di means two and penta stands for five. Also, N means nitrogen and S means sulfide.
4. Formula: PCI3
There is one phosphorous atom and 3 chlorine atoms, since there is 3 chlorine atoms, we would use tetra and then add ide as the suffix since chlorine is an anion.
When you boil water, you aren't changing the elements. You're just making water vapor. However, when you burn paper, it becomes carbon (mostly). So physical changes will not change the substance, only chemical changes will.
