Which of the following is NOT an example of a watershed?Select one:
a. Santee River Basin
b. Edisto River Basin
c. Pee Dee Watershed
d. The Atlantic Ocean
Check

Answers

Answer 1

Answer: The answer to this question is A

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47.0 ml of an HBr solution were rotated with 37.5 ml of a 0.215 m lioh solution to reach the equivalent point. What is the molarity of the hbr solution

Answers

Answer:

0.172 mol·L⁻¹

Step-by-step explanation:

1. Write the chemical equation for the reaction.

HBr + LiOH ⟶ LiBr + H₂O

===============

2. Calculate the moles of LiOH

c = n/V Multiply each side by V

n = Vc

V = 0.0375 L

c = 0.215 mol·L⁻¹

Moles of LiOH = 0.0375× 0.215

Moles of LiOH = 8.062 × 10⁻³ mol LiOH

===============

3. Calculate the moles of HBr

1 mol HBr ≡ 1 mol LiOH

Moles of HBr = 8.062 × 10⁻³× 1/1

Moles of HBr = 8.062 × 10⁻³ mol HBr

===============

4. Calculate the molar concentration of the HBr

V = 47.0 mL = 0.0470 L

c = 8.062 × 10⁻³/0.0470

c = 0.172 mol·L⁻¹

The molarity of the HBr solution is 0,172 M.

The neutralization reaction between LiOH and HBr is the following:

HBr(aq) + LiOH(aq) → LiBr(aq) + H₂O(l)

Photosynthesis is a chemical reaction where carbon dioxide and water react to form glucose (CHI) and oxygenrepresents the proper balanced equations for photosynthesis?

Answers

Answer:

6H₂O + 6CO₂ + energy → C₆H₁₂O₆ + 6O₂

Explanation:

Photosynthesis:

It is the process in which in the presence of sun light and chlorophyll by using carbon dioxide and water plants produce the oxygen and glucose.

Carbon dioxide + water + energy → glucose + oxygen

water is supplied through the roots, carbon dioxide collected through stomata and sun light is capture by chloroplast.

Chemical equation:

6H₂O + 6CO₂ + energy → C₆H₁₂O₆ + 6O₂

it is known from balanced chemical equation that 6 moles of carbon dioxide react with the six moles of water and created one mole of glucose and six mole of oxygen.

The reaction completely follow the law of conservation of mass because there are equal number of atoms of each elements on both side of equation.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride.

Answers

Answer:

True

Explanation:

Ammonium sulfate reacts with barium chloride to produce barium sulfate and ammonium chloride.

An (blank) is an abbreviation for the name of an element and usualy has eighter one or two letters

Answers

The Chemical Symbol is the Abbreviation for the name of an element.

Which is the best example of immiscible liquids?

Answers

"Lava lamps": the liquid is a plastic with a very low melting point.

"lighter fluid" and whiskey: lighter fluid is xylene and it does not mix with either ethanol nor water.

Silicon lubricant and milk: silicon oil is similar to ordinary oil. Milk contains emulsifiers to dissolve oil, but I doubt these work with silicon.

Gasoline and grape juice: gasoline is a hydrocarbon and these compounds don't mix with sugar nor water.

Oil and water. Immiscible liquids do not mix.

The continents do not end at the shoreline. Land forms continue under the sea extending from the continental shelf to the deep ocean floor with a vast variety of life.Choose a list of terms describing land forms found on the ocean floor.
A) continental shelf and slope, mid-ocean ridge, rift zone, trench, and the ocean basin
B) continental rise and shelf, continent, ridge, canyon, trench, and typhoon
C) tectonic plates, continental slope, island, mountain, reef, and the ocean barrier
D) continental shelf, ocean basin, mountain ridge, rise, and tidal wave