Answer:
This process is considered as a cycle because it continues and dosent stops. This process includes the evaporation of watet from earth surface due to heat.this water is converted in to water vapours. After reaching clouds it condences back. When the clouds become heavy with watef it falls back on earth as rain.and the process repeats.
Explanation:
B. positively charged.
C. negatively charged.
D. not part of an electrolyte.
Answer:
The correct answer is option B. positively charged.
Explanation:
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When an atom yields its electrons, it yields part of its negative charge. Therefore, it immediately transforms into a positively charged ion.
This positively charged ion is called cation.
We conclude that the correct answer is option B. positively charged.
In the reaction of hydrochloric acid and calcium carbonate, to balance the equation, the correct order of numbers would be 2 for HCl, and 1 for CaCO3, CaCl2, CO2, and H2O.
When hydrochloric acid (HCl) reacts with calcium carbonate (CaCO3) in concrete, it forms calcium chloride (CaCl2), carbon dioxide (CO2), and water (H2O). To balance this reaction, you could input the numbers: 2 HCl(aq) + 1 CaCO3(s) → 1 CaCl2(aq) + 1 CO2(g) + 1 H2O(l). This phenomenon is part of the larger concept known as a neutralisation reaction, where an acid reacts with a base to produce a salt and water. In this case, the hydrochloric acid is the acid and the calcium carbonate in the concrete is the base. This is also an example of a gas evolution reaction, as carbon dioxide gas is being produced.
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You and your team work at Southern Nevada Water Authority and have been given the job of managing fluoride levels for the municipal water system. Today, you will need to measure the mass of the mineral sample fluorite (chemically, CaF2). Use this sample to determine how much water must be added to yield a 1 ppm fluoride solution. Your supervisor is requesting tanker trucks to bring the excess water. He needs to know how many tanker trucks to request and the total cost.
Notes: 1 mol CaF2 = 78.08 g CaF2 = 6.02 x 1023 molecules of CaF2
1 molecules of CaF2 = 2 atoms of F
1 mol H2O = 18 g H2O Density of water is 1 g/mL
1000 mL = 1 L and 3.78 L = 1 gallon
mass of sample of CaF2 = 287.185 g
1 part per million = 1 atom of fluorine per 999,999 water molecules.
1 truck can carry 12,800 litters of water at a cost of $2,852.42 dollars.
Before you begin mixing a solution of fluorite and water your team must first calculate the amount of water you will need. Your team will create a presentation that will show all of the necessary calculations to ensure that the greater Las Vegas area will have cavity free teeth. The presentation should include the following information:
- Draw a diagram that points out the basic design of the water system and transport.
- Demonstrate the following calculations
(a) Calculate how many moles of mineral fluorite (CaF2) are in you sample.
(b) Calculate the number of fluorine atoms in the sample of the mineral fluorite (CaF2).
(b) Calculate how many molecules of water you will need.
(c) Calculate the number of gallons of water that are needed to dissolve a 287.185 gram sample of fluorite to yield 1ppm solution.
(e) How many trucks will be needed? Show your calculations!
(f) what is will be the total cost?
- Bonus points for creativity or “WOW” factor (i.e. pictures, color, neatness)!
I AGREE WITH bmstanley19
Water can dissolve many ionic and covalent compounds.
Water can dissolve many substances, but often requires large amounts of heat to be added.
Water is usually available.
Water is known as the 'universal solvent' because water can dissolve many ionic and covalent compounds.
It is considered as a universal solvent because it has the ability to dissolve large number of substances in it as compared to other liquids so that's why we can say that water is a universal solvent due to its high dissolving power.
Learn more about water here: brainly.com/question/1313076
The best answer is the second statement. It is considered as a universal solvent since most substances dissolve in water. And comparing it to other liquids, it is the one who dissolves a wide range of substances. Also, it is an important substance for every living thing.
B. less than
C. greater than