CHEMISTRY MIDDLE SCHOOL

Check all items common to bases.minerals
metal
gas
H+
OH-
nitrogen

Answers

Answer 1
Answer:

OH- is common to bases.

Explanation:

The base is a is an ionic compounds which when placed in aqueous solution dissociates in to a cation and an anion OH-.

The presence of OH- in the solution shows that the solution is basic or alkaline.

From Bronsted and Lowry concept base is a molecule that accepts a proton for example in NaOH, Na is a proton donor and OH is the proton acceptor.

A base accepts hydrogen ion and the concentration of OH is always higher in base.

There is a presence of conjugate acid and conjugate base in the Bronsted and Lowry acid and base.

Conjugate acid is one which is formed when a base gained a proton.

Conjugate base is one which is formed when an acid looses a proton.

And from the Arrhenius base Theory, the base is one that dissociates in to water as OH-.
Answer 2
Answer:

Answer:

metal and OH-

Explanation:

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Explain why atoms move at different speeds depending on whether they are liquids or solids.

Answers

The space between the particles allows them to do so. 

Example, a solid's particles are squished together, so it appears as a solid shape. 

What would happen to temperatures on earth the suns heat were distributed throughout the atmosphere

Answers

If the sun's heat is distributed uniformly throughout the atmosphere, this will ensure that each point on the earth gets a moderate level of heat and temperature in these locations will be within the acceptable level.
If the sun's heat is concentrated in one part of the atmosphere, the location that correspond to the point of concentration will receive enormous amount of heat from the sun, which will shoot up the temperature of that location. This will leads to all manner of disruptions in the ecosystem that is found in that location.
For example, California's water cycle was on hold because we did not have any rain. The weather has been dry warm, so all of the water is being evaporated, but never reaching the precipitation phase of the cycle.

How many experimental trials are needed before a hypothesis can be accepted as true ?

Answers

approximately, or at least the test must be repeated until 3 times, to find an accurate average and hypothesis.
3 times or more because you need to have 3 trails or more to be able to explain why your hypothesis is correct!!

Students are able to introduce a sample of gas into a chamber with a moveable wall, allowing them to change the size of the portion of the chamber occupied by the gas. When the volume of the gas is reduced, what change in property would be the most reasonable to expect? a.)the temperature will decrease
b.)the pressure will decrease c.) the pressure will increase d.) the density will decrease

Answers

Final answer:

The pressure will increase. The correct option is (C).

Explanation:

The most reasonable change in property to expect when the volume of the gas is reduced is the pressure will increase.

This relationship between pressure and volume is described by Boyle's law, which states that when the volume of a gas decreases at constant temperature, the pressure of the gas increases.

This is because reducing the volume of the chamber decreases the space available for the gas particles to move, leading to more frequent collisions with the walls and an increase in pressure.

Therefore, as the volume of the gas is reduced in the chamber, the pressure will increase.

Learn more about pressure and volume relationship here:

brainly.com/question/31735835

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Answer:b

Explanation:

if your doing it on stemscopes

Mendel identified a combination of "factors" inherited from each parent called a ????​

Answers

Mendel discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits. The “factors” are genes.

Easy Questions! Chemistry - Please help! I give thanks

Answers

this is not chemistry but

see it is a triangular prim on it's side
V=BH
are of base times height
the base is a triangle
height is 18.5

base=1/2bh
b=8.6
h=8.4
base=1/2(8.6)(8.4)
base=36.12

V=bh
V=36.12*18.5
V=668.22

round
V=668.2 ft^3
all sides have to be exact
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