CHEMISTRY HIGH SCHOOL

20 g of sugar is stirred into a beaker containing 100 g of water. After the sugar has completely dissolved, the solution is put on a scale. What is the mass of the solution?

Answers

Answer 1

Answer:

The mass of the solution of sugar and water is 120 grams.

What is mass?

Mass is the quantity of matter of a physical body.

The mass of the sugar is given is 20g

The mass of the water is 100 g.

100 + 20 = 120 gram

Thus, the mass of the solution of sugar and water is 120 grams.

Learn more about mass

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Answer 2

Answer: The mass of the solution should be 120g since 20g of sugar were added to 100g and 100+20=120.
I hope this helps. Let me know in the comments if anything is unclear.

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1.11g of methane CH4 is burned in a bomb calorimeter containing 1000 grams of water. The initial temperature of water is 24.85 degrees Celsius. The specific heat of water is 4.184 J/g degrees Celsius. The heat capacity of the calorimeter is 695 J/degrees Celsius. After the reaction the final temperature of the water is 35.65 degrees Celsius. Calculate the heat absorbed by the water. Then calculate the heat absorbed by the calorimeter.

Answers

Given:
M methane = 1.11g CH4
M calories = 1000g or g of H2O
C heat capacity = 4.184 J/g °C of H2O
C heat capacity = 695 J/°C
Ti = 24.85 °C
Tf = 35.65 °C

Ask: ΔH = ?
Formula: q=mCΔT
= (1000 g) (696 J/°C) (10.8°C)
= 7506000 J H2O (endothermic) release heat

q reaction = -q calorimeter
= -7506000 J = ΔH

The oxide of metal.x has the.formula XO. which group in the periodic table contains X

Answers

Between the oxygen atom and the metal ion, the oxide is created. The first group of the periodic table contains a metal called X.

What is periodic table?

Periodic table is defined as a method of showing elements in a table where similar-property elements are grouped or displayed in the same vertical column. It is frequently recognized as a symbol of chemistry and is used extensively in physics, chemistry, and other sciences. It is a visual representation of the periodic law, which claims that the atomic numbers of chemical elements have a roughly periodic relationship with their attributes.

The element X is a member of the 15th group and third period. There will therefore be three shells in the atom, and its valence shell will contain five electrons. The electronic setup will therefore be 2, 8, 5. In addition, X's atomic number is 15 (2 + 8 + 5).

Thus, between the oxygen atom and the metal ion, the oxide is created. The first group of the periodic table contains a metal called X.

To learn more about periodic table, refer to the link below:

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HI,
IF IT FORMS AN Oxide of the form XO,
KNOWIng that oxygen has a charge of -2,the element with which it is combined must have a charge of +2 to get a ratio of 1;1
so i think n i'm pretty sure that the answer is the group 2 elements(alkali earth metals) or it may also be a group 6(cuz the have two oxidation states the +2 and +4)
its up to u now,
goodluck

Can i get help with this dont really get it

Answers

Answer:

Number 2 is Direction

Explanation:

The old answer for number four was incorrect

I apologize for the inconvenience but I do not have an answer that fits in the lines for number 4

Minnesota is one of the largest contributors of nitrogen to the Gulf.
a. True
b. False

Answers

The answer is false it is not a contributor of nitrogen to the gulf.

i think that it is false .............

Hard water contains calcium and magnesium, which undergo oxidation andclog water pipes. Which statement best describes this change as a chemical change?

A.Calcium and magnesium dissolve in water.

B.Calcium and magnesium evaporate on contact with the walls of the pipe.

C.Calcium and magnesium form precipitates of their respective oxides.

Answers

It's C, calcium and magnesium form precipitates of their respective oxide

Final answer:

The statement 'Calcium and magnesium form precipitates of their respective oxides' best describes the chemical change as it involves a reaction that transforms the calcium and magnesium into new compounds, their oxides, which can clog pipes.

Explanation:

The statement that best describes this change as a chemical change is C. Calcium and magnesium form precipitates of their respective oxides. This represents a chemical change because it involves a reaction that transforms the calcium and magnesium into new substances - their oxides. Here's how it works: in the presence of oxygen, calcium and magnesium in hard water can undergo an oxidation process. During this oxidation, the calcium becomes calcium oxide and the magnesium becomes magnesium oxide. These oxides are less soluble in water and form precipitates, which can accumulate and clog the pipes.