A nucleus emits an alpha particle. What happens to the mass
number and the atomic number of that nucleus?

A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical  formula.

As an example, calcium hydroxide is [tex]\bold { Ca(OH)_2 }[/tex] . The subscript (2) indicates that calcium hydroxide contains two hydroxide ions.

Therefore, A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical  formula.

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Answer:

c

Explanation:

You can differentiate between calcite and halite without using any measuring equipment based on: C. Hardness.

A mineral can be defined as a form of naturally occurring, inorganic solid substance that is typically characterized by a crystal structure.

In Science, the properties that can be used to identify and differentiate two or more minerals include the following:

In conclusion, hardness is a mineral property that can be used to differentiate between calcite and halite without using any measuring equipment.

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Answer:

0.0997 mol K

Explanation:

First of all, the picture and your question do NOT match so I will solve for what you are asking for.

3.9g x 1 mol/39.10 g = 0.0997 mol K

The 39.10 grams is the atomic mass of potassium

Answer:

I think it should be about maybe the times of the dinosaurs

also I think 23 to 16 billion years

Explanation:

No explanation sorry if im wrong

Mammals are the animals of the vertebrate group with the presence of the mammary gland. About 16-23 billion years ago hooved animals lived before humans.

Hoofed animals or mammals the even and odd-toed ungulates that have toes in their feet region used to balance their body weight. They have a nail-like case known as a hoof.

Hoofs protect the feet area and enable fast running in mammals. Some examples of hoofed mammals are a cow, zebra, antelope, moose, horse, deer, etc.

Therefore, humans evolved in the Oligocene Epoch and the mammals in the Cretaceous or the Jurassic period.

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Answer:

C Ian sure2.94atm

Explanation:

I am low student

Answer:

Explanation:

The process is photosynthesis as plants need carbon dioxide and humans need oxygen so plants release oxygen which humans breath/take in and plant/trees take in carbon dioxide which humans release.

The natural process which removes  carbon dioxide from the atmosphere is photosynthesis.

It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy  through the process of cellular respiration.

Some of the energy which is converted  is stored in molecules of carbohydrates like sugar and starches  which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis  are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.

The process begins with proteins absorbing light energy  which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.

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Answer:

B

Explanation:

stronger gravitational gradient

Answer:

Chemical change.

Explanation:

When it is heated it decomposes into mercury and oxygen gas. The mercury oxide reactant becomes the silver color of mercury. Hence, a color change can be noticed throughout the reaction.

Answer:

chemical change

Explanation:

Answer:

Ionosphere.

Explanation:

The atmospheric layer that is represented by F is known as IONOSPHERE.

The characteristics of Ionosphere

1. It is considered to be located in the upper layer of the earth's atmosphere due to the location of region F.

2. It is ionized by solar radiation that contains an electrical charge.

3. It functions as a reflector. This can be observed in radio waves broadcasting.

Answer:

D. There is no net change to the system

Explanation:

Equilibrium means "equal". In a chemical system, changes occur in substances called the reactants to produce another substance called the products. These changes from reactants to products and vice versa occur at an uneven rate until EQUILIBRIUM is reached.

In other words, equilibrium is attained when the reactants and products are formed at an equal or constant rate i.e. There is no net change to the system. For example, in the chemical system below:

A + B ⇌ C + D

This system is said to be at "EQUILIBRIUM" if the rate of reaction of the reactants (A and B) is equal to that of the products (C and D). That is, there is no net change (difference) in the reaction rate.

Answer:

where is the questions........

Answer:Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave. Description: Wavelength is the distance from one crest to another, or from one trough to another, of a wave (which may be an electromagnetic wave, a sound wave, or any other wave).

Answer:

21500m

Explanation:

Answer:

21, 500 meters

Explanation:

There are 1000 meters in a kilometer. Muliply 21.5 x 1000 to find this.

Hope it helps!

Answer:

If it can change shapes easily.

Explanation:

A fixed volume eliminates gas as a possible state of matter, therefore leaving liquid and solid.

If the substance can easily change shape, it is a liquid. If it cannot change shape, then it is a solid.

Another way to determine the state of matter is through particle movement.

If particles slip past each other, it is a liquid. If particles vibrate in place, it is a solid.

Answer:

A) plugging your nose

This is because of your olphactory bulb being blocked. This is the series of nerve endings in your nose, that not only allows you to smell, but to taste at the same time.

Answer:

1. A

2. D

3. E

4. B

5. C

Explanation:

1. Plants are known as producers since they produce energy for themselves through photosynthesis.

2. The rabbit is a primary consumer since it’s herbivore and only feeds on producers for energy.

3. The tiger is a carnivore, and preys on other consumers for energy.

4. A human is an omnivore since it can gain energy from both producers and consumers.

5. Bacteria are know as decomposers since such category of organisms break down other organisms to gain energy.

Answer:

I think 213g

Explanation:

Im not that smart in stuff based in this subject but I think its right but If anyone knows for sure fact check me plz....

D on the left side because if you look st periodic table it shows were most of the medallions are founf

Answer:

its the right side ik its not an option on here but its the right side on some

Explanation:

trust me

Answer:

N=5.47×10^23

Explanation:

n=

[tex]n = \frac{m }{ar} [/tex]

N=n×la

Answer:

The melting of a glacier is an example of interaction among;

Hydrosphere, asthenosphere, atmosphere

Explanation:

The melting of a glacier is an example of the interactions among the Earth's cryosphere and hydrosphere

The cryosphere is described as the portions on Earth where water appears in solid (frozen) form such as glaciers, frozen grounds, snow covered land, sea ice, ice sheets, river ice, ice caps, etc.

The hydrosphere is all the forms water on a planet including, ice, liquid water and water vapor, therefore, the cryosphere is a part of the hydrosphere

The geosphere comprises the Earth's interior, including the asthenosphere, which is fluid and hot and therefore spread heat through both conduction and convection to the hydrosphere that raises the ocean temperatures and lead to glacier melting

The green house effect in the atmosphere results in global warming that raises the average temperature of the Earth which in turn raises the temperature of the oceans and the troposphere, resulting in melting of a glacier

Therefore, the melting of a glacier is an example of interaction among the hydrosphere, asthenosphere, and, atmosphere

Answer:

All living organisms are made up of one or more cells, which are considered the fundamental units of life. Even unicellular organisms are complex! Inside each cell, atoms make up molecules, which make up cell organelles and structures. In multicellular organisms, similar cells form tissues.

Explanation:

Answer:

All living organisms are composed of one or more cell

Explanation:

hope this helps, please mark brainliest

Answer:

See explanation below

Explanation:

In order to do this, you are missing two important data, which are the initial temperatures of the water and the rod.

For practical purposes, I will assume this data, and then you'll just replace the procedure with your data to get an accurate result.

So, for this exercise, I will assume that the rod of Chromiun was heat to 100 °C and then cooled with water at 20 °C, so the final temperature is 54.5 °C.

To get the specific heat, we need to use the following expression:

q = m.C.ΔT  (1)

Where:

q: Heat of the substance/compound

m: mass

C: specific heat

ΔT: Difference of temperature of the mixture.

With this expression, we need to calculate first the heat of the water, because:

q₁  + q₂ = 0

Therefore, with the value of the transfered heat, we can determine later the specific heat. So, As we have the specific heat of water which is 4.18 J/g °C, and the temperature and mass, we can determine the heat of the mixture:

ΔT = 54.5 - 20 = 34.5 °C

q₁ = 35 * 4.18 * 34.5

q₁ = 5047.35 J

Now, we can determine the specific heat of the rod:

q₁ = -q₂

-5047.35 = 323.98 * (54.5 - 100) * C

-5047.35 = -14741.09C

Hope this helps

Answer:

[tex]4dm^{3}[/tex]

Explanation:

1dm^3 is equal to 1L.

Answer:

The way that lead got to the river is by transportation through soil. When the battery got buried it was still leaking and it moved through the pores of soil and was able to travel very far away to the lake.

Explanation:

Answer:

photosynthesis

Explanation:

I think

Answer:

cinder cone: made of pieces of lava

shield volcano: wide summit, gentle slope

volcanic soil: rich in nutrients

caldera: bowl shaped depression

lava plateau: material fills in valleys

Explanation:

it’s right

Answer:

Caldera, Bowl-Shaped depression

Shield volcano, Wide summit, Gentle slope

Lava plateau, Material fills in valleys

Volcanic soil, Rich nutrients

Cinder Cone, Made of pieces of lava

Explanation:

Got it right on edge

Answer:

Non-luminous

Explanation:

Complete combustion of wax take place in non-luminous zone of a candle flame