CHEMISTRY HIGH SCHOOL

H e l p,,, ill give brainliest :)
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Answers

Answer 1
Answer:

Hi there! :)

Both are compounds.

CO_(2) contains 1 carbon (C) atom and 2 oxygen (O)  atoms.

It contains two different elements, so it is a COMPOUND.

Na_(2) O is an IONIC compound with elements Sodium (Na) and Oxygen (O), which are different elements. Therefore, it is also a COMPOUND.

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Which gaseous element has the greatest density at stp n2 o2 cl2 f2?
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
An ionic bond would most likely form between atoms of which of these pairs?A. oxygen and oxygen B. magnesium and oxygen C. magnesium and magnesium
A soccer balll is travelling at a velcrocity of 50ms the kinetic energy of the ball is 500 what is the mass of the soccer ball

Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two metals?A) The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.
B) The alkali metal atom forms a +2 ion, while the alkaline earth metal atom forms a +1 ion.
C) The alkali metal atom has one less shell of electrons than the atom of the alkaline earth metal.
D) The alkali metal atom has one more shell of electrons than the atom of the alkaline earth metal.

Answers

Answer: The correct answer is Option A.

Explanation:

Chemical reactivity is defined as the tendency of an atom to loose or gain electrons.

Metals are the elements that looses electrons and thus, their chemical reactivity will be the tendency to loose electrons.

Their chemical reactivity decreases as we move from left to right in a period. This is so because, the electron get added up in the same shell. So, the electron in the outermost orbital gets more tightly bonded to nucleus. And hence, loosing an electron will require high energy. Thus, the chemical reactivity decreases.

  • Alkali metals are the elements which belong to group 1 of the periodic table. The general electronic configuration of these metals is ns^1

These metals will loose 1 electron to form +1 ions.

  • Alkaline earth metals are the elements which belong to group 2 of the periodic table. The general electronic configuration of these metals is ns^2

These metals will loose 2 electrons to form +2 ions.

Hence, the correct answer is Option A.
A) The alkali metal atoms forms a +1 ion, while the alkaline eaeth metal atom forms a +2 ion.

which sample, when dissolved in 1.0 liter of water, produces a solution with the highest boiling point?

Answers

After a thorough research, the same question exists with the following choices.

(1) 0.1 mole KI
(2) 0.2 mole KI
(3) 0.1 mole MgCl2
(4) 0.2 mole MgCl2

The correct answer is (4) 0.2 mole MgCl2. IN Vant Hoff factor, it is greater for MgCl2. There are more ions.

. SE7.12D Which of the following statements accurately represents the differences inplant and animal cells?
Only plant cells have a cell wall, chloroplasts, and a large vacuole.
Only animal cells have a cell wall, chloroplasts, and a large vacuole.
Only plant cells have a cell membrane, mitochondria, and cytoplasm.
Only animal cells have a cell membrane, mitochondria, and
cytoplasm.
CLEAR ALL

Answers

Features which are found in plant cellsonly are the chloroplast, large vacuole and cell wall.

  • Plants and animal cells consists of the following parts ; Mitochondria, cell membrane, vacuole, cytoplasm and so on.

  • The vacuole present in animal cells are much smaller than those found in plant Cells. Hence, vacuole in animal cells are called small vacuole

  • Plant cells also consists of cell wall, chloroplast and a large vacuole. All these are missing in animal cells.

Therefore, Only plant cells have "acellwall,chloroplastsandalargevacuole."

Learn more : brainly.com/question/18012076?referrer=searchResults

Only plant cells have a cell wall, chloroplasts, and a large vacuole.

I hope this helped :)

Which population increases the amount of soil nutrients available to plants? A.
squirrels that bury nuts in the ground

B.
fungi that decompose the remains of dead trees

C.
flowers that turn to follow the sun as it moves across the sky

D.
bees that help spread pollen from one plant to another

Answers

The population tha increases the amount of soil nutrients available to plants is D) bees that help spread pollen from one plant to another.

Answer: D. bees that help spread pollen from one plant to another

Explanation: i took the k12 test and passed :)

Formic acid, HCOOH, is a weak electrolyte what solutes are present in an aqueous solution of this compound write the chemical equation for the ionization of HCOOH

Answers

Answer:

Explanation:

Formic acid (HCOOH) is a weak electrolyte when dissolved in water. In an aqueous solution of formic acid, it partially ionizes into its constituent ions. The solutes present in this solution are the ions produced during ionization.

The chemical equation for the ionization of formic acid (HCOOH) in water is as follows:

HCOOH (aq) ⇌ H⁺ (aq) + HCOO⁻ (aq)

In this equation:

HCOOH represents formic acid molecules.

H⁺ represents the hydrogen ions (protons) that are formed when a molecule of formic acid loses a hydrogen ion (H⁺).

HCOO⁻ represents the formate ion, which is the conjugate base formed when a molecule of formic acid donates a hydrogen ion (H⁺).

Since formic acid only partially ionizes in water, not all molecules of formic acid dissociate into ions. This is why it is considered a weak electrolyte.

The kinetic molecular theory assumes that the particles of an ideal gas(1) are in random, constant, straight-line motion
(2) are arranged in a regular geometric pattern
(3) have strong attractive forces between them
(4) have collisions that result in the system losing energy

Answers

Option no.1 are in random, constant, straight-line motion

Following assumptions:
 a. number of molecular size is very large, but their separation is very large compared to their molecular size.
 b. randomly distribution of molecules in which their speed does not change 
c. molecules undergo elastic collision with other molecules but exert no force
d. molecules followed Newton's laws of motion
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A). Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po change into after it emits an alpha particle? b). Some undiluted acids aremore corrosive when they are diluted with water. That is why laboratory workers are told to wipe acid splashes with a towel before washing with a copious amounts of water. Explain.