CHEMISTRY HIGH SCHOOL

It is believed the major reason for the decline in amphibian species is _______.a.
death through disease
b.
changing reproductive habits
c.
mutation
d.
climate change

Answers

Answer 1
Answer:

The major reason for the decline in amphibian species is climate change.

Amphibians are organisms that can live on land and in water. They are

usually found around moist areas because they need water bodies to cool

off in order for their survival.

Climate change is characterized by an increase in temperature which

doesn't favor them as they lose more water which thereby threatens survival

and leads to their decline in the ecosystem.

Read more on brainly.com/question/17825266
Answer 2
Answer:

Answer: It is believed the major reason for the decline in amphibian species is death through disease.

Explanation:

Related Questions

What is the difference between an atom in the ground state and an atom in an excited state? A. The atom in the ground state has less energy and is less stable than the atom in an excited state. B. The atom in an excited state has one fewer electron than the atom in the ground state. C. The atom in an excited state has more energy and is less stable than the atom in the ground state. D. The atom in an excited state has one more electron than the atom in the ground state.
Compared to the mass and the penetrating power of an alpha particle, a beta particle has?1) Less mass and greater penetrating power 2) less mass and less penetrating power 3) more mass and greater penetrating power 4)more mass and less penetrating power
Which of these statements best explains how fossil records provide evidence to the scientific theory of evolution?A.They show how natural selection happened on Earth by chance. B.They show how organisms choose to adapt to changing Earth conditions. C.They prove that structure and location of remains of organisms depict past events. D.They prove that natural selection always leads to greater complexity in organisms. z
Given a formula of a functional group: An organic compound that has this functional group is classified as
We can also use the activity series to predict reactions between a metal and an acid. what are the products of the reaction fe(s) + h2so4(aq)?

36 Which compound has the highest percent com­position by mass of strontium?(1) SrC12 (2) SrI2 (3) SrO (4) SrS

Answers

To solve this problem we must first find the masses of each individual compound. Then we can use the following equation:
(mass of strontium) / (mass of compound) * 100% = (percent mass of Strontium)

1. The mass of strontium is 87.62 and the mass of Chlorine is 35.45. There are 2 chlorine atoms in the compound, so 35.45*2 = 70.9. Add the strontium to get the mass of compound. 70.9 + 87.62 = 158.52. Now, we can use the equation. 

87.62 / 158.52 * 100% = 55.27% Strontium

2. There are 2 Iodine atoms in the compound, and the molar mass of Iodine is 126.9. The mass of the compound is 126.9 + 87.62 = 214.52. Now, we can use the  equation

87.62 / 214.52 * 100% = 40.84% Strontium

3. The molar mass of Oxygen is 16, and there is only one oxygen atom. So the mass of the compound will be 16 + 87.62 = 103.62. Now we can use the equation.

87.62 / 103.62 * 100% = 85.46% Strontium

4. Finally, the molar mass of sulfur is 32.06, and there is only one sulfur atom in the compound, so the mass will be 32.06 + 87.62 = 119.68. Now we can use the equation

87.62 / 119.68 * 100% = 73.21% Strontium

Therefore, the answer is 3 because it has the highest percentage of Strontium than the other compounds. Hope this helped!! :D

If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume isdecreased to 20.0 mL?
Which equation should you use?
V1 V2
T1 T2
P1V1 = P2V2
V1 V₂
N1 N2

Answers

Answer: P1V1 + P2V2

Explanation:

Ricardo wants to determine the length of a strip of zinc metal. What is the SI unit for length? foot inch liter meter

Answers

Answer : The correct option is, meter

Explanation :

S.I : It is known as the international System of Units. It is defined as a scientific method to express the magnitude of the several basics units.

There are seven basic units in the system from which the other units are derived.

The seven base unit are, meter for length, kilogram for mass, second for time, ampere for current, kelvin for temperature, mole for amount of substance and candela for intensity.

As per question, the S.I unit of length of a strip of zinc metal is, meter.

Hence, the correct option is, meter

The Si unit for length is meters.

What is the net ionic equation? (This is already balanced, just need the net ionic) 2CH3COOH(aq)+ Sr(OH)2(aq)----> Sr(CH3COO)2(aq)+2H2O(l)

Answers

Net ionic equation should be like this :
CH3COOH(aq) + OH- --> CH3COO- + H2O(l) 
According to the fact that acetic acid is too weal and non-ionized, put  CH3COOH, Sr(OH)2 is not so strong but can dissolve therefore can ionize.

All of the following can be used to define a base except__. A. a hydronium ion donor in a reaction B. a substance that increases the concentration of hydroxide ions C. an electron pair donor in a reaction D. a substance that is a hydrogen ion acceptor in a reaction

Answers

All of the following can be used to define a base except__.

Answer: Out of all the options presented above the one that cannot be used to define a base is answer choice A) a hydronium ion donor in a reaction. As we already know a base is a compound that is a proton (H¹⁺) acceptor.

I hope it helps, Regards.

Which will boil faster distilled water or salt water and why?

Answers

Answer:

The distilled water will be boiled faster as it does not contain any non - volatile solute.

- The salty water contains different non - volatile salts in it.

- Due to the presence of these salts, its vapour pressure will be decreased and boiling point will be elevated.

- So, salty water will take more time to boil.

- On the other hand, distilled water does not have any such solute and due to this its vapour pressure will not be affected.

- Hence, it will boil fast than salty water.
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