Characteristics that are used to help identify an object are called

Answer:

The answer is for your question is A

Answers:

Most of the world’s energy comes from what three sources?

Oil, coal, and gas.

These energy sources are called fossil fuels and they are non-renewable resources.

Fuel type: oil

How it's formed: from the remains of ancient marine organisms

Its uses: transportation, industrial power, heating and lighting, lubricants, petrochemical industry, and use of by-products

Fule type: coal

How it's formed: when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial

Its uses: electricity generation, metal production, cement production, chemical production, gasification, and other industrial uses

Fuel type: gas

How it's formed: decomposed organic matter mixed with mud, silt, and sand on the seafloor

Its uses: heating & cooling buildings, cooking foods, fueling vehicles, and electricity generation

Answer:

1. 7 (a neutral solution)

Answer: 10-7= 0.0000001 moles per liter

2. 5.6 (unpolluted rainwater)

Answer: 10-5.6 = 0.0000025 moles per liter

3. 3.7 (first acid rain sample in North America)

Answer: 10-3.7 = 0.00020 moles per liter

The concentration of H+ in the Hubbard Brook sample is 0.00020/0.0000025, which is 80 times higher than the H+ concentration in unpolluted rainwater.

Explanation:

Answer:

m = 204.16 grams

Explanation:

Given that,

No. of moles, n = 3.49

Molar mass of NaCl, M = 58.5 g/mol

We need to find the mass of 3.49 moles NaCl​. We know that,

[tex]n=\dfrac{m}{M}\\\\m=n\times M\\\\m=3.49 \times 58.5\\\\m=204.16\ g[/tex]

So, there are 204.16 grams in 3.49 moles NaCl​.

Answer:

111.03kPa = P₂

Explanation:

Gay Lussac's Law states that the pressure of a gas is directly proportional to the absolute temperature when volume remains constant.

The equation is:

P₁T₂ = P₂T₁

Where P is pressure and T absolute temperature of 1, initial state and 2, final state of the gas.

P₁ = 85.5kPa

T₂ = 127°C + 273.15 = 400.15K

P₂ = ?

T₁ = 35°C + 273.15 = 308.15K

P₁T₂ = P₂T₁

85.5kPa*400.15K = P₂*308.15K

Answer:

Potassium

Explanation:

Most reactive metal in the reactivity series

The element in the question is referred to the alkali metal which is known as Potassium

Potassium is a highly reactive metal and reacts with Hydrochloric acid to

form a salt known as Potassium chloride and hydrogen gas.

Hcl + K ⇒ Kcl₍s₎ + H₂₍g₎

Potassium has a white color but when it reacts with water it explodes and

gives out a purple-red color as a result of the high excitation of electrons.

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Answer:

A. They are malleable, ductile, and conduct electricity.

Explanation:

Answer:

a

Explanation:

Answer:

5 g/cm^3

Explanation:√3V=1.91293cm

Answer:

please give me brainlist and follow

Explanation:

Contamination of ground water can result in poor drinking water quality, loss of water supply, degraded surface water systems, high cleanup costs, high costs for alternative water supplies, and/or potential health problems. The consequences of contaminated ground water or degraded surface water are often serious.

Answer:

Zn2 + SO4 = Zn2(SO4)2

Explanation:

Answer:

commensalism

Explanation:

It's not parasitism as the shark is not harmed in the relationship

Answer:

What is this?

Explanation:

Answer:

uhm i believe its D hope i helped

Explanation:

Answer:

D. decomposers

Answer:

P2N5

Explanation:

you have to plus it 2 times

This means that if you know how many moles of solute you have in the target solution, you also know how many moles of solute were present in the stock solution sample.

Use the molarity and volume of the target solution to determine how many moles of hydrochloric acid,

HCl

, you need in that solution

c

=

n

V

⇒

n

=

c

⋅

V

n

HCl

=

0.10 M

⋅

500

⋅

10

−

3

L

=

0.050 moles HCl

Now the question is - what volume of stock solution would contain this many moles of hydrochloric acid?

c

=

n

V

⇒

V

=

n

c

V

stock

=

0.050

moles

12

moles

L

=

0.0041667 L

I'll leave the answer rounded to two sig figs, despite the fact that you only gave one sig fig for the volume of the target solution

V

stock

=

4.2 mL.follow me

Answer:

Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height).Explanation:

Answer:

A

Explanation:

the boat does not have a force to counter act the boys it must give which means it moves cause it is one something that is not as dense as the boy (I THINK)

Answer: I don’t think the answer is A or C. Maybe B.

The word chemosynthesis means

the synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals, typically in the absence of sunlight.

Explanation:

In accordance with the diagram, activation energy is the distance from the reactants to the top of the "hill"

The activation energy represented on the energy diagram is as given as

"Activation energy is the distance from the reactant to the top of the hill"

So, the correct option is A.

The minimum amount of energy required by the reactant to do the reaction is called activation energy.

To learn more about activation energy here.

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Answer:

i think its 62.50 :) hope this helped you out

Answer: D

Explanation: The Eukarya differ from the Archea and Bacteria in that their cells are eukaryotic, meaning they contain a membrane enclosed nucleus and other membrane enclosed organelles.

Eukarya is different from organisms classified as Archaea and Bacteria because Eukarya have membrane-bound nuclei. Therefore, option (D) is correct.

The type of cell of the organism can be classified into three domains. First is the bacteria which have no nucleus present in cells. Then Archaea have no nucleus in the cells but they have a different cell wall than bacteria. Then Eukarya have a nucleus in them.

The domains of Archaea and Bacteria are both composed entirely of small, single-celled organisms but they also have differences. All are composed of prokaryotic cells, which are nucleus-less cells.  T

All the cells in the Eukarya domain contain their genetic material or DNA within the nucleus. Four classes make up the Eukarya domain: Plantae, Fungi, Animalia, and Protista.

Therefore, the domain of the Eukarya is different from organisms classified as Archaea and Bacteria as Eukarya have membrane-bound nuclei.

Learn more about Eukarya, here:

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5.25 moles

Chemistry

Atomic Structure

Aqueous Solutions

Stoichiometry

Step 1: Define

[RxN - Balanced] 2KClO₃ (s) → 2KCl (s) + 3O₂ (g)

[Given] 3.50 mol KClO₃

[Solve] mol O₂

Step 2: Identify Conversions

[RxN] 2 mol KClO₃ (s) → 3 mol O₂ (g)

Step 3: Stoichiometry

Answer: C. 0.57 M

Explanation:

Molarity= Moles/Vol

Answer:

when population increases the amount of carbon dioxide also increases as population use oxygen and release carbon dioxide

Carbon dioxide is a major greenhouse gas. The increase in the population increases the carbon dioxide amount.

The main product released from the respiratory process of organisms, especially animals is carbon dioxide. The increase in their population will increase this product.

The increased population will increase the demand for the burning of fossil fuel, pollution, and respiration, and hence the product of these activities, carbon dioxide will increase in the atmosphere.

Therefore, the carbon dioxide will increase with an increase in the population.

Learn more about carbon dioxide and population here:

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Answer:

i think the answer is c

Explanation:

sorry if im wrong i am most likely wrong but ye

Answer:

Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.