Why does a frog have 2 lives

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Answer 1

Answer:
They start their life in the water as a tadpole, then they adapt to land and go through metamorphosis to become a frog.

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Gas A effuses 0.68 times faster than gas B. If the molar mass of gas B is 17 grams, what is the mass of gas A?
Tin-126 has a half life of 100,000 years. How many years does it take toreduce 100 g of Tin-126 to 12.5 g?100,000 years200,000 years50,000 years300,000 years
48dm3 of a gas has a mass of 262g how many moles is this? What is the Mr? What must this element be?
What is the least dense layer of the earth

7. Methane, CH, burns in oxygen gas to form water and carbon dioxide. Wequation for this reaction?a. CH4+ O H2O CO2b. CH4+ 40 2H20+ CO2c. CH4 O2 H2O CO2d. CH4+ 202 2H20 CO28. How many atoms are present in 3 moles of chromium?c. 1.80 x 1024 atomsa. 6.02 x 1023 atomsb. 1.80 x 1023 atomsd. 52.00 atoms
9. How many grams of CO2 are in 2.1 mol of the compound?a. 21.0 gc. 66.0 gb. 44.0 gd. 92.4 g

Answers

7) the answer is D. You need to know that oxygen gas is O₂ which means that A and B can't be right. Then you need to see which one is balanced and since D is and C is not, the correct answer has to be D.

8) You need to know that 1 mole of anything contains 6.02×10²³ particles. therefore you multiply 6.02×10²³ by 3 to get 1.806×10²⁴ atoms.

9) You need to multiply the number of moles of carbon dioxide by the molar mass of carbon dioxide (44g/mol). 2.1mol×44g/mol=92.4g. Therefore the answer is 92.4g of CO₂.

I hope this helps. Let me know if anything is unclear.

Water pollution that washes into storm sewers from many places, such as parking lots and lawns, is known as nonpoint-source pollution. True or false ?

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The statement that is given from above “Water pollution that washes into storm sewers from many places, such as parking lots and lawns, is known as nonpoint-source pollution” is true. This is difficult to treat as the source may come from different points.

A solution that is a 4 on pH scale is a

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a pH scale runs from 1 to 14 with 7 being neutral.

1-6 has base like properties
8-14 has avid line properties

since this solution has a pH scale of 4.... the solution is basic

A solution that is 4 on pH scale is an acid. A pH scale is used to measure whether a solution is an acid or a base. the pH scale is numbered between 0 to 14. 7 is the neutral point of this scale. Any solution having a pH of 7 is a neutral solution. Acidity of a solution increases as the reading in the scale decreases from seven towards zero. The basic nature of the solution increases as the pH level of the solution increases from 7 towards 14. The acidic nature of a solution having pH value of 3 is ten times more acidic than a solution having pH value of 4. The same thing is same while comparing basic solutions as well.

What is The ratio of atoms in HCI is

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The ratio of atoms in HCl is

The ratio of atoms in hydrogen chloride shortened as HCl is 1:1. This is because there is only one atom of hydrogen that is reacted with another atom of chlorine. A ratio indicates the relative sizes of two or more quantities.

When given another compound like H₂ SO₄, we can describe the elements as being in the ratio of 2:1:4. Thus, we can see the relative quantities of the individual elements in the given compound.

In conclusion, the ratio of atoms in HCl is 1:1.

Learn more about the ratio of atoms here:

brainly.com/question/18069697

Answer:

Each molecule of HCl is composed of a one-to-one ratio of hydrogen and chlorine.

Explanation:

At room temperature, HCl is a colorless, poisonous gas. Dissolve it in water, and, voilà, you have hydrochloric acid. For the record, acids are substances that release hydrogen ions in water. The more hydrogen ions an acid releases in water, the stronger the acid (see "What is an ion?" below). If you concluded from the above discussion that HCl releases many hydrogen ions in water, you are right!

10. How many g of Cu(OH)2 can be made from 9.1 x 1025 atoms of O?

Answers

Molar mass Cu(OH)₂ = 97.561 g/mol

97.561 g Cu(OH)₂ --------------- 6.02x10²³ atoms
? g Cu(OH)₂ -------------------- 9.1x10²⁵ atoms

mass = 9.1x10²⁵ * 97.561 / 6.02x10²³

mass = 8.87x10²⁷ / 6.02x10²³

mass = 14734.2 g

hope this helps!

What does Mg stand for in chemistry

Answers

Mg is an element that stands for Magnesium.

Mg is the chemical symbol for Magnesium.

- - In relation towards chemistry, Mg is equal to and standing for magnesium(mg).

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Aqueous solutions of this ion give a reddish precipitate when excess hydroxide ion is added.(A) Cu^{2+} (B) CO₃^{2−} (C) Fe^{3+} (D) Al^{3+} (E) Pb^{2+}

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2 points) Now they feel it is best to have you identify an unknown gas based on its properties. Suppose 0.508 g of a gas occupies a volume of 0.175 L at a temperature of 25.0◦C is held at a pressure of 1.000 atm. What gas is this most likely?