Fossil fuels are called nonrenewable resources because
A
they were made by dinosaurs, which are extinct.
B
it is impossible for humans to make more in our lifetimes.
с
they are easy to replace whenever they run out.
D
it is possible to use them for many different purposes

Answers

Answer 1

Answer:

The Answer is B

Explanation:

Fossil fuels take millions of years to be made, and every other answer doesn't make sense


Related Questions

The diagram shows genetic structures.



Which label best represents the area marked Y?

chromosome
protein
gene
DNA

Answers

Answer:

The correct answer is - DNA (check image).

Explanation:

In this diagram, The W mark is the nucleus of the cell X is the chromosome Y represents the DNA and Z is the gene. Gene is the segment of the DNA and DNA is the pat of the chromosome with histone. Chromosomes are present in the nucleus of the cell. These all are the structures of the genetic structures.

Thus, the correct answer is - DNA.

Answer:

dna

Explanation:

edge

A sample of river wayer contains 125mg per dm^3 of dissolved soilds. Calculate the mass of dissolved soilds in grams in 250 cm^3 of this sample of river water. Giver your answer to 2 significant figures (4 marks)

I will give brainilist to anyone who answers​

Answers

Cm3 into dm3 = 250/1000= 0.25dm3

Answer is in g convert mg into g = 125/1000= 0.125g

This means there is 0.125g of solids in 0.25dm3

Need to know how much is in 1dm3

0.25dm3 is 1/4 of 1dm3

0.125/4 = 0.03125

0.031g (2S.F)

The mass of a substance is the product of its density and volume. Thus, the   mass of the dissolved solids with a density of 125 mg/dm³ with a volume of 250 cm³ is 31.25 mg.

What is density?

Density of a substance is the measure of its mass per unit volume. Thus it describes how much denser the substance is in a given volume. Mathematically it is the ratio of mass to the volume.

Density of a substance depends on the mass, volume, bond type, temperature and pressure. The ratio of density of a substance with the density of water is called its specific gravity.

It is given that the density of the dissolved solids is 125 mg/dm³ and the volume is 250 cm³ or 0.25  dm³. Thus the mass can be calculated as follows:

density = mass/volume

 mass   = density × volume

             = 0.25  dm³  ×  125 mg/dm³

             = 31.25 mg

Hence, the mass of the dissolved solids in the river wayer is 31.25 M=mg.

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Al aumentar la temperatura ¿Cómo varía la presión?​

Answers

Answer:

california y nueva york

Explanation:

Answer:

las partículas se mueven más rápido, y por lo tanto tienen mayor velocidad, por lo tanto mayor impulso y por lo tanto mayor fuerza cuando chocan con las paredes, por lo que la presión aumenta.

Explanation:

what is non polar covalent bond​

Answers

Answer:

It is formed between two atoms of the same elements having same electronegativity in which the bonding electrons are equally shared between them. In this case, the centre of the positive charge coincides with the centre of the negative charge in theecular molecule. H, N: 0. etc. are the molecules in which non polar covalent bonds invalved. These substances are called non polar substances.

Answer:

A nonpolar covalent bond is a covalent bond in which the bonding electrons are shared equally between the two atoms. In a nonpolar covalent bond, the distribution of electrical charge is balanced between the two atoms.

Explanation:

HELP ASAP PLEASE CHEMISTRY
The rate of reaction was measured during a chemical reaction. After the first 3 seconds, the rate of reaction was 1.8 x10−6 M/s. Which of the following would you expect after another 3 seconds?

The rate would be lower, and the concentration of products would be higher.
The rate would be lower, and the concentration of products would be lower.
The rate would be higher, and the concentration of products would be higher.
The rate would be higher, and the concentration of products would be lower.

Answers

Answer:

The rate would be higher, and the concentration of products would be lower.

Explanation:

The correct answer is The rate would be lower, and the concentration of products would be higher.

The rate of reaction refers to the speed with which reactants are converted into products.

The rate of reaction decreases as the reaction progresses because more reactants are being converted into products.

As such, the reactant concentration decreases and the concentration of products increases.

Hence, after three seconds, the rate would be lower, and the concentration of products would be higher.

https://brainly.com/question/23761331

Fusion reactions power the _____ in space. Humans currently use fusion in _____ , but researchers are seeking more applications.

Answers

Answer:

Sun and the stars, nothing humans don't use fusion at all

Explanation:

Nuclear fusion reactions  power the  sun  in space. Humans currently use fusion in nuclear weapons by means of nuclear reactions, but researchers are seeking more applications.

What are nuclear reactions?

There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.

In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.

In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.

Learn more about nuclear reactions,here:

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Tides are the rise and fall of surface levels of Earth's ocean water caused by the gravitational effects of which two celestial objects?
A)stars and planets
B)comets and meteors
C)earthquakes and volcanoes
D)moon and sun

Answers

Answer:

D)Moon and sun

Explanation:

Because the gravitational pull of the moon is weaker on the far side of the Earth, inertia wins, the ocean bulges out and high tide occurs.

hope it helps:)

D) Moon and sun causes the rise and fall of tides

Which statement about hydrocarbons is FALSE?
a
The number one use of hydrocarbons is as a fuel
source.
b
Most hydrocarbons we use today come from
sustainable, renewable sources.
с
Hydrocarbons are useful in industries from
transportation to road work to cosmetics.
d
The bulk of hydrocarbons we use today were
formed hundreds of millions of years ago.

Answers

Answer:

b

Explanation:

Hydrocarbons provide 84% of the world's energy, but they are non-renewable. Hydrocarbons are the most economic form of energy.

18. How many grams are in 563 mL of chlorine gas at STP?

Answers

Answer:

[tex]at \: stp : \\ 22400 \: ml \: are \: occupied \: by \: 71 \: g \: of \: chlorine \\ 563 \: ml \: will \: be \: occupied \: by \: ( \frac{563}{22400} \times 71) \:g \\ = 1.78 \: g[/tex]

Calculate the mass of NaOH
required to prepare a 0.343M
solution dissolved in 2500mL
of water.

Answers

Answer:

will this work or help?

Explanation:

Calculate the mass of NaOH required to prepare a 0.343 M solution dissolved in 2500 mL of water. 0.343 M = x mol / 2.5 L = 0.86 mol 0.86.

__________________ are high-speed bands of winds occurring at the top of the tropsophere.

Your answer:


Doldrums

Horse Latitudes

Jet Streams

Trade Winds

Answers

Answer:

jet streams

Explanation:

THE JET STREAM Narrow bands of exceedingly high speed winds are known to exist in the higher levels of the atmosphere at altitudes ranging from 20,000 to 40,000 feet or more. They are known as jet streams.

Which is true for a substance that releases energy?
OA. The energy release decreases the molecular motion and the kinetic energy of the substance.
B. The energy release decreases the molecular motion but increases the kinetic energy of the substance.
C. The energy release increases the molecular motion and the kinetic energy of the substance.
D. The energy release increases the molecular motion but decreases the kinetic energy of the substance.
E. The energy release is used only to change the state of the substance.

Answers

I’m not sure but I think it’s the first one

What is the molarity of 15.0 milliliters of an unknown acid that is titrated
with a 1.25 M NaOH solution and required 24.65 milliliters of base to
complete the titration?

Answers

Answer:

~2.054M

Explanation:

In this question ,I am going to assume that the acid is monoprotic acid(contains only one hydrogen) which I'll represent by HA.

Chemical equation:

NaOH(aq) + HA(aq)----->NaA(aq) + H2O(l)

The mole ratio of NaOH:HA is 1:1

1.25M NaOH=1.25 Moles/L or 1.25 moles /1000ml of NaOH

(1.25 moles /1000ml) x (24.65ml)=0.0308125 moles NaOH

Mole ratio is 1:1

So, moles of HA are also 0.0308125 moles

volume of HA  =15ml

To find molarity of HA:

=(0.0308125 moles x 1000ml)/(15ml)

~2.054M of HA

~Hope it helps:)

Circle the solution with the highest concentration
a. 5.0M
c. 0.6M
b. 1.0M
d. 0.75M

Answers

Answer:

answer is option a..............

Explanation

5mill


Hope this helps

WILL MARK BRAINLIEST!!!!

How many moles are there in 993.6 grams of potassium sulfate (K2SO4)?

Answers

Answer:

5.702 mol K₂SO₄

General Formulas and Concepts:

Atomic Structure

Reading a Periodic TableCompoundsMoles

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 993.6 g K₂SO₄

[Solve] moles K₂SO₄

Step 2: Identify Conversions

[PT] Molar Mass of K: 39.10 g/mol

[PT] Molar Mass of S: 32.07 g/mol

[PT] Molar mass of O: 16.00 g/mol

Molar Mass of K₂SO₄: 2(39.10) + 32.07 + 4(16.00) = 174.27 g/mol

Step 3: Convert

[DA] Set up:                                                                                                       [tex]\displaystyle 993.6 \ g \ K_2SO_4(\frac{1 \ mol \ K_2SO_4}{174.27 \ g \ K_2SO_4})[/tex][DA] Divide [Cancel out units]:                                                                         [tex]\displaystyle 5.7015 \ mol \ K_2SO_4[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 4 sig figs.

5.7015 mol K₂SO₄ ≈ 5.702 mol K₂SO₄

Perform the following
mathematical operation, and
report the answer to the
appropriate number of
significant figures.
4.7257 - 3.12 = [?]

Answers

The answer is
1.6057

Answer:

1.61

Explanation:

I got this answer from a calculator and it's correct.

MgCl2 + NaOH → Mg(OH)2 +Naci
Balance

Answers

MgCl2+2NaOH=Mg(OH)2+2NaCl

What volume of 15.9 M Nitric acid would be required to make 7.2 L of 6.00 M nitric acid? (hint: dilution problem) will mark brainliest if correct

a. 2.72 L
b. 686.88 L
c. .075 L
d. 272

Answers

Answer:

d

Explanation:

Which of the following elements has the lowest electron affinity?

a. Si
b. F
c. Cl
d. K

Answers

Answer:

k

Explanation:

electron affinity (EA) depends on various factors like effective nuclear charge (enc) , size of the atom, ellipticity of sub-shell (ep) , nature of configuration.

more is the enc more will be the EA

more is the size less will be the EA

more valance shell ellipticity (closer to the nuclei) more will the EA ( all given element posses P orbital in the valance shell)

The answer is K I just took the test

20 mL of hydrogen measured at 15° C is heated to 35°C.
What is the new volume at the same pressure?

Answers

V2 = 21.4 ml

Explanation:

Note: When dealing with gases, make sure that you change the units from °C to K.

T1 = 15°C + 273 = 288K

T2 = 35°C + 273 = 308K

V1 = 20 ml

V2 = ?

We use Charles's law to solve V2:

V1/T1 = V2/T2

or

V2 = (T2/T1)V1

= (308K/288K)(20 ml)

= 21.4 ml

Water flows more easily than syrup, which means water has

A. higher viscosity than syrup

B. lower viscosity than syrup

C. equal viscosity to syrup

Answers

Answer:

lower viscosity than syrup

Answer:

higher viscosity than syrup flows more easily than syrup.

Please give me Brainliest answer

What is the pH of 0.0000043M HNO3 ? (3 sig figs, round the last digit only if needed)

Answers

Answer:

pH = 5.37

Explanation:

We'll begin by obtaining the concentration of the hydrogen ion in the solution. This can be obtained as follow:

HNO₃ (aq) —> H⁺ (aq) + NO₃¯ (aq)

From the balanced equation above,

1 mole of HNO₃ produced 1 mole of H⁺.

Therefore, 4.3×10¯⁶ M HNO₃ will also produce 4.3×10¯⁶ M H⁺.

Finally, we shall determine the pH of the solution. This can be obtained as follow:

Concentration of Hydrogen ion [H⁺] = 4.3×10¯⁶ M

pH =?

pH = –Log [H⁺]

pH = –Log 4.3×10¯⁶

pH = 5.37

Therefore, the pH of the solution is 5.37

In a neutral solution, the concentration of H+ is
Group of answer choices

Answers

Answer:

equal to [OH-]

Hydrogen ion concentration is more conveniently expressed as pH, which is the logarithm of the reciprocal of the hydrogen ion concentration in gram moles per liter. Thus, in a neutral solution the hydrogen ion (H+) and the hydroxyl ion (OH−)

which of the following does not contain a covalent bond ( please answer asap!! )

Answers

Answer:

Option 4

Explanation:

Juan Carlos placed 35 grams of ice into a dry, 200-gram container. The top
of the container was attached tightly. When the ice was completely melted, the
student measured the mass of the container with the liquid water. What should the
mass of the liquid water in the container be?
A. 35 grams
B. 165 grams
C. 200 grams
D. 235 grams

Answers

Mass of the liquid water in the container is 35 grams-

Mass doesn't depends upon the state of compounds.

The mass of the liquid water in the container should be 35 grams.

Mass would not change during a change of state because the number of particles does not change during a state change. It does not matter if a substances freezes, boils, melts, sublimates.

So, the mass of liquid water in the container is the same as ice. Hence, the correct option is (A).

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Please help this will determine my grade so I beg help me out and my grade

Answers

Answer:

C: checking your email

Explanation:

I believe that C would be impossible, as you cannot use wireless networks without radio waves

The answer is C (checking emails your email on laptop computer using coffee shop WiFi
Step by step explanation:
Radio waves are used for communications radio waves are a type of electromagnetic radiation best known for their use in communication technologies
So you can’t communicate or use WiFi’s without radio waves.
Have a nice day.

You have a block of wood with a mass of 700 grams and a volume of 1100 cm.
What is the density of wood?

Answers

The Mass of wood be 400
The density of the wood is 400

I have a flask filled with water and on top a stopper .

I heat it over a flame .

after some time what will happen to the stopper

Answers

Answer:

A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. Invented by Sir James Dewar in 1892, the vacuum flask consists of two flasks, placed one within the other and joined at the neck. The gap between the two flasks is partially evacuated of air, creating a near-vacuum which significantly reduces heat transfer by conduction or convection.

The typical design of a Thermos brand vacuum flask, used for maintaining the temperature of fluids such as coffee.

Laboratory Dewar flask, Deutsches Museum, Munich

Diagram of a vacuum flask

A cryogenic storage dewar of liquid nitrogen, used to supply a cryogenic freezer

Vacuum flasks are used domestically, to keep beverages hot or cold for extended periods of time, and for many purposes in industry.

pls make me as brainliest

-Carbon and Oxygen combine to from carbon dioxide

Answers

Answer:

Carbon and oxygen combine to form two oxides, carbon monoxide and carbon dioxide in which the ratio of the weights of carbon and oxygen is respectively 12:16 and 12:32.

The mixture of carbon and oxygen is called carbon dioxide


What is the major difference, in terms of weathering type, between Albany, NY and Washington, D.C.? What might explain this difference?

Answers

Base your answers to the following questions on the graph below, which shows the effect that average yearly precipitation and temperature have on the type of weathering that will occur in a particular region.

City
Avg. Yearly Temp (oC)
Avg. Yearly Precip (cm)
Albany, NY
9oC
98 cm
Washington, D.C.
15oC
111 cm
Phoenix, AZ
20oC
22 cm

The breakdown or dissolution of rocks and minerals of the planet's surface is called weathering it can be chemical, biological or physical.

Chemical weathering occurs in regions with high rainfall and high temperature.

In Albany, NY the temperature is 9°C with 98 cm rainfall while in Washington, DC the temperature is 15°C with 111 cm rainfall that is Washington is hotter compared to Albany so it will have chemical weathering.

Water (rainfall) and temperature is the main cause of weathering as they loosen and breaks the mineral of rock surfaces.

The rocks and minerals get dissolved in the water bodies because of erosion by which they get carried in oceans.

Therefore, Albany will have mechanical while Washington will suffer from chemical weathering.

To learn more about weathering types follow the link:

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