CHEMISTRY MIDDLE SCHOOL

Which of the following is a solution: pure water, fruit punch, cereal and milk in a bowl? Explain how you know.

Answers

Answer 1
Answer: Hi.  Fruit Punch is a solution and i know this because in a Fruit Punch, you have to mix water, the fruit juice, sugar and many other substances. In pure water it is just water. In cereal and milk, those are two different foods, not a combined one, like Fruit punch. Hope that was not too confusing! ;)
Answer 2
Answer: Fruit punch is because it blends together evenly and cereal and milk in a bowl you can't mix together you could easily take the cereal out and for the fruit punch you cant

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Which compound of an element in period 3 reacts with water to form a solution with a pH greater than 7?A. SiO2
B. SiCl4
C. NaCl
D. Na2O

Answers

The compound of an element in period 3 that reacts with water to form a solution with a pH greater than 7 is:

D. Na₂O (sodium oxide)

In period 3 of the periodic table, the elements are sodium (Na) and silicon (Si), among others. Let's analyze the options:

A. SiO₂ (silicon dioxide) does not react with water to form a solution with a pH greater than 7. It is an acidic oxide and can react with water to form a weakly acidic solution.

B. SiCl₄ (silicon tetrachloride) is not a compound that reacts with water to form a solution with a pH greater than 7. It hydrolyzes with water to produce hydrochloric acid, which leads to a decrease in pH (more acidic).

C. NaCl (sodium chloride) does not react with water to form a solution with a pH greater than 7. It is a neutral compound and does not affect the pH of water.

D. Na₂O (sodium oxide) reacts vigorously with water to form sodium hydroxide (NaOH), a strong base. Sodium hydroxide is highly soluble in water and completely dissociates into hydroxide ions (OH⁻) and sodium ions (Na⁺). The presence of hydroxide ions in the solution makes it basic, resulting in a pH greater than 7.

Therefore, the correct answer is D. Na₂O (sodium oxide).

To know more about compound here

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The answer is D. Nasub(2)O. 
Nasub(2)O + H2O --> 2 NaOH 
Nasub(2)O solution has pH much higher than 7 

Choose all the answers that apply.The scientific method _____.

1. is always exactly the same in all areas of science
2. can be used to organize scientific investigation
3. begins with communication
4. is a logical series of steps
5. answers all questions

Answers

i think the answer is 5

Final answer:

The scientific method is a flexible framework used to organize scientific investigation that begins with communication and is a logical series of steps. It does not answer all questions.

Explanation:

The scientific method is a logical series of steps that can be used to organize scientific investigation. It does not have to be the same in all areas of science; rather, it is a flexible framework that can be adapted based on the specific field of study. The scientific method begins with communication, as scientists often share their findings with the scientific community through research papers and presentations. However, the scientific method does not answer all questions; it is a systematic process that allows scientists to test and evaluate hypotheses, but it does not provide definitive answers to all inquiries.

Learn more about the Scientific Method here:

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Please Help!!!!!How is the position of the full moon in relation to Earth and the sun different from the position of the full Venus in relation to Earth and the sun? Does the apparent size of the moon change with its phases? Please explain!!!!

Answers

i have got no idea how to answer this question sorry 

A sample of metal has a mass of 16.63 g, and a volume of 7.94 mL. What is the density of this metal?

Answers

Answer:

The density of the metal is 2.094 g/mL.

Explanation :

Given,

mass of metal sample = 16.63 grams

Volume = 7.94 mL.

Density = ?

Density of the metal can be found by using the formula

Density = Mass/Volume

Substituting the values we get,

density = 16.63/7.94

by solving,

density = 2.094 g/mL.

Which organic molecule is digested into simple sugar?

Answers

Lipids, this is not chemistry............

How many carbon dioxide molecules are needed to produce 5 glucose molecules?

Answers

For each molecule of glucose produced: 6 water water molecules are oxidized, and become the source of electrons for carbon dioxide reduction. 6 molecules of carbon dioxide are required, one for each carbon atom in glucose. 6 molecules of oxygen are produced as a by product of water oxidation.
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