Chemistry High School

Which series of words describes lengths of geologic time from shortest to longest?

era
period
eon
era

Answers

Answer 1

Answer:

eon,era, period

Explanation:

Answer 2

Answer:

period<era<eon

Explanation:

I took the test, sadly got a 70%.

Related Questions

At room temperature(20°C), water is a:
solid
liquid
gas

Answers

Answer:

Solid

Explanation:

At room temperature(20°C), water is a:

The answer is liquid

Once atoms have achieved a full outer shell they have the electron configuration of what family?
will mark brainliest

Answers

Answer:

At some point in your chemistry education, you may have been introduced to the song “The Elements,” in which Tom Lehrer does a rapid-fire musical rendition of all the elements' names. Like me, you may even have been offered the opportunity to memorize this song for extra credit. If so, it’s possible that you still remember the names of all the elements, which is an impressive feat—not to mention a fun trick to pull out at parties.

Explanation:

Answer:

atoms tend to achieve the electron configuration of a noble gas which is a full outer level of 8 electrons

help please thank u!!!

Answers

It should be the first answer choice

What is a change in the environment outside of the organism

Answers


W the

hofzfohFip kno wrt

_____ is a complex carbohydrate used to store
energy in animals.

Answers

Answer:

Glycogen

Explanation:

What are derived units? Give an example

Answers

in chem, a derived unit is an SI unit of measurement derived as a product of one or more of the seven units

A nuclear fission reaction produces more energy than a nuclear fusion reaction.
True or false

Answers

Answer:

true

Explanation:

Help me please will give brainliest!!!

Answers

Answer:

Element A and element D

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what are all of the man made elements

Answers

Answer:

technetium,promethium,polonium.and astatine

Explanation:

Virtual Classifying Elements on the Period Name the three general categories into which the elements are divided. 3​

Answers

Answer:

 kgtπ橆§π©gu6gt7

Explanation:

Answer:

Metals, Non-Metals and Metalloids.

Note:

There are in fact four main categories:
Metals, nonmetals, metalloids and noble gases. However, noble gases are consist of elements of no toxicological chemical significance because they are very stable and not forming any stable compound and interactive.

chemical properties can be used to

Answers

Answer:Chemical properties can be contrasted with physical

Explanation:

Which of the following is the best example of solar energy being converted into chemical energy?

Can someone help me pleaseeeeee!!!!

Answers

I think it’s the second one

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Answers

osmium, magnesium, titanium, iron

Explanation:

Can any kind soul help me ASAP​

Answers

Answer:

in my opinion its going to be B because the moles of experiment I are more than moles of experiment II

WILL MARK BRAINLIEST

Predict the charge each of the following atoms would have as an ion-if more than one charge is possible,
include each different charge

A. Cl
B. Na
C. Mg
D. O
E. Al
F. N
G. Be
H. Ne

Answers

Explanation:

A. Cl⁻

B. Na⁺

C. Mg⁺⁺ Or Mg²⁺

D. O²⁻

E. Al³⁺

F. N³⁻

G. Be²⁺

H. Ne (No charge because it's an noble element)

1) All atoms of the same element must contain the same: a) mass number b) protons c) neutrons d) compounds​

Answers

Answer:

all atoms of the same element mist contain the same number of. protons

Explanation:

For isotopes, only the number of neutrons has been changed. examples are carbon-12 carbon-13 and carbon-14, because none of these situations change the number or protons, the atomic number stays the same regardless

How many molecules are in 23.45 moles of oxygen (O2)?

Answers

23.45x (6.02 x 10^23) =1.41 x 10^25


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What can be accurately said about
Earth's continents?

Answers

The correct answer is c they have always been shaped how they are now
The answer is A, They fit together like one big Jig-Saw Puzzle. Referencing Pangea, Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million years ago, and it began to break apart about 175 million years ago.

Which option is an example of a physical property?

A toxicity


B rusting ability


C melting point


D flammability

Answers

Answer:

C . Melting point

Explanation:

Examples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density

There are two compounds of gold and chlorine. In one compound, there is 15.39 g of gold for every 2.77 g of chlorine. In the other compound, there is 7.74 g of gold for every 4.18 g of chlorine.

Find the ratio of masses of gold in the two compounds (give in 'y:x' format)
The answer is 3:1 so whoever this helps

Answers

Answer:

The ratio of the masses of gold in the two compounds = 3 : 1

Explanation:

In compound 1:

15.39 g of gold combines with 2.77 g of chlorine

mass of gold that will combine with 1 g of chlorine  = 15.39/2.77 = 5.55 g

In compound 2:

7.74 g of gold combines with 4.18 g of chlorine

mass of gold that will combine with 1 g of chlorine  = 7.74/4.18 = 1.8 g

Ratio of gold in the that combines with 1 g of chlorine in the two compounds is given as

5.55/1.85 = 3

Therefore, the ratio of the masses of gold in the two compounds = 3 : 1


A student has a sugar cube and a glass of tea.
What are two ways the student can increase the speed at which the sugar
cube dissolves in the glass of tea?
O A. Add more sugar cubes to the tea.
B. Add ice cubes to the glass of tea.
C. Stir the tea after adding the sugar cube.
D. Break the sugar cube into smaller pinces.

Answers

Answer:

D  or C Because C speads up the process while D makes the water have to process less But I say C

Explanation:

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Answer: C & D

Explanation: hope this helps

When calcium carbonate is heated ,two new substances, calcium oxide and carbon dioxide are formed a)write a word equation for the above chemical reaction b)is calcium carbonate an element or a compound ?Explain

Answers

Answer:

Explanation:

 When calcium carbonate is heated the new substances formed will be Calcium oxide and carbon dioxide

(a)

[tex]CaCO3 + heat[/tex]→[tex]CaO+ CO2[/tex]

[tex]Calcium carbonate + heat[/tex]→[tex]Calcium oxide +Carbon dioxide[/tex]

(b)

Elements are pure substances made up of the same atoms such as Ca, C, etc.

Compound are formed when two or more different types of elements are bonded together. like Calcium carbonate in this case

hence, [tex]CaCO3[/tex] is a compound

The U.S. Military provides personnel on deployment with fuel bars to heat up their meals. A fuel bar provides 380.0 kJ of energy, and 73% of that energy can be transferred to food. How many ounces of water could be heated by one fuel bar to brew coffee in the field? The initial temperature of the water is 16.0°C and it needs to be heated to boiling at 100.0°C.

Answers

Answer:

Explanation:

380 x 10³ J

73% of 380 x 10³ = 277.4 x 10³ J

mass of water = m gram

heat used to boil water = m x 4.2 x ( 100 - 16 )

= 352.8 m = 277.4 x 10³

m = 786.3 g

1 gram = .0352 ounce

786.3 gram = 786.3 x  .0352 ounce

= 27.68 ounce .

What happens when the chemicals inside an instant cold pack mix together
A.the mixture inside the pack gives off coldness
B.the mixture generates static electricity
C.the mixture absorbs thermal energy from the surroundings
D.the mixture releases thermal energy into the surroundings.

Answers

Answer:

the answer is C

Explanation:

there is no such thing as COLD exept absolute ZERO. anything that feels COLD, perse, is just tranfering your thermal energy into it, since it is lacking that energy

When the chemicals inside an instant cold pack mix together then the mixture absorbs thermal energy from the surroundings.

How heat is flow?

Heat always flow from hot body to cold body in order to maintain the equilibrium between two bodies.

So when the chemicals inside an instant cold pack mix together then they will absorbs heat in the form of thermal energy from the surronding as they are in cool temperature and will not able to give off heat.

Hence absorption of thermal energy from the surrounding takes place.

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Read the statement and identify whether it is a Chemical Change, Physical Change, or Both. Answer the following questions Chemical (A), Physical (B) or Both (C).

Eating and digesting cheese pizza.

Answers

Explanation:

Eating and digesting cheese pizza is a Chemical Change because it is an irreversible reaction. It can't be undone.

Mari wonders why some parts of the hoodoo seem to be wearing away faster than others. Which factor causes this to happen? *

Answers

Small, solid pieces of material that come from rocks or the remains of organisms; earth material deposited by erosion.

Short answer: type of rock

Some parts of the hoodoo seem to be wearing away faster than others as earth material produced by erosion; small, solid particles of matter derived from rocks or perhaps the remains of organisms.

What is hoodoo ?

A hoodoo is indeed a tall, thin rock spire created by erosion. It is also known as a tent stone, fairy chimneys, and earth pyramid. Typically, hoodoos are made of very brittle rock that is covered in harder, less brittle stone that shields each column first from weather.

Hoodoos can have varying colors over the course of their height due to minerals deposited within various types of rock. Some parts of the hoodoo seem to be wearing away faster than others as earth material produced by erosion; small, solid particles of matter derived from rocks or perhaps the remains of organisms.

Therefore, some parts of the hoodoo seem to be wearing away faster than others as earth material produced by erosion; small, solid particles of matter derived from rocks or perhaps the remains of organisms.

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If we want to know how many neutrons an element has we:
a. look at Period Number ( row)
b. subtract Atomic Number from Atomic Mass
c. look at Atomic Mass (below element symbol)
d. look at Atomic Number (above element symbol)

Answers

Answer: B

Explanation: I don’t really know how to explain this because it’s just something my teacher told me and it just stuck in my head

White powder lab analysis

Answers

uhhhhdhffshsjghwhshs cocaine
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Why is so much energy produced through fusion and fission reactions?

Answers

Answer:

there is a ton of heat being produced

Explanation:

more heat more energy

If a 200 g sample of Radon-220 has a half-life of 55 seconds. How much material is left after
220 seconds?
A 12.5 g
B) 25 g
c) 55 g
D) 100 g

Answers

The answer is A - 12.5 grams. Every 55 seconds, half of the Radon would decay. After 220 seconds, this process would have occurred 4 times.

The answer is B 12.5g

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