Which pair of elements are the most different

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Answer 1

Answer:

After a radioactive atom decays, it is the same element that it was before with no measurable change in mass. the decay that is present is gamma decay because gamma decay has photons which has no mass unlike alpha and beta decay.

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If a solution A has twice as much solute as solution B. Is it possible for the solutions to have the same concentration?

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Yes, if solution B has double the mass of solution A.

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A student wants to increase the maximum amount of sugar that can dissolve in water. She crushes the sugar and then stirs it into the water. Does this work? Explain why or why not.

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Answer:

The amount of sugar that can dissolve in water increase .

Explanation:

Energy, which is the capacity to do work or produce heat, affects the rate at which a solute will dissolve.
Breaking up, crushing or grinding a sugar cube before adding it to water increases the sugar's surface area.
The more surface area a solute has, the faster it will dissolve because more particles of the sugar can interact with the water.
This means the finer the sugar particles, the faster it will dissolve.
The sugar in the middle of a sugar cube is protected from the water by the sugar in the outer layers of the cube; the water has to go through those outer layers first.
But if you crush the cube into a powder, all of the sugar is exposed to the water at once.

Which geologic era lasted the longest?A) The Cenozoic
B) The Mesozoic
C) The Paleozoic
D) The Precambrian

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Your answer is going to be d.

Air enters and exits the lungs through the ___.aveoli
bronchi
pulmonary vein
trachea

Answers

the answer is aveoli

It would be alveoli! :)

Calcium hydroxide reacts with a substance to produce calcium carbonate
name the substance

Answers

Calcium Hydroxide (Ca(OH)2) reacts with the Carbon Dioxide (CO2) present in the Air to form Calcium Carbonate (CaCO3) and Water (H2O).

The equation looks something like this -->

Ca(OH)2 + CO2 = CaCO3 + H2O

Let the substance be p

CaOH + p = CaCO3

following the laws of chemical reactions and law of conservation of mass, p will be 1 atom of carbon dioxide and 2 atoms of oxygen. Thus, the p will be CO2.

Thus, CaOH + CO2 = CaCO3

Please note that during this process, water will also be produced.

What happens to water once it reaches earths surface?

Answers

it evaporate back to the atmosphere which later on back to its cycle which later on fall as rain

It turns into an ocean?

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Write this number in standard notation.1.986 x 10negative exponent 6 or 1.986 x 10^6

Which of the following is NOT a good technique for managing used oil? A) Have specific, labeled catch pans available for technicians who are collecting oil B) Spills in your shop and any releases on pavement or outside should be poured down a drain C) Do not use oil containers for antifreeze or other non-similar fluids D) Be prepared for oil spills with the proper absorbents

A solid precipitate is formed from the reaction of lead nitrate and sodium chromate. What would be the best method to separate this solid from the solution?