The graph shows levels of carbon dioxide in Earth's atmosphere over the last 400,000 years.
Which conclusion can you draw from the information shown in the graph?
O Carbon dioxide levels in the past have been as high as they are now.
O Carbon dioxide levels are currently much lower than normal.
O Carbon dioxide levels are always about the same.
O Carbon dioxide levels are currently higher than they have ever been.

Answer:

cause it has more

space between molecules.

O C. Ice has a higher density than li

Explanation:

Answer:

tRUE??

Explanation:

Answer:

C

Explanation:

similar physical properties

I hope you understand and thank you for your questions

Answer:

d

Explanation:

Answer:

c. chemical and physical

Explanation:

hope this helps! :)

Answer: they do this because if they do they can easily find new viruses to stay safe from

Explanation: i took test on it recentley

A DRY ICE is hole were the steam looks a lot a smoke

Answer:

I think u understand this answers

Answer:

Substances over 7 are categorized as basic, with 7 being the neutral point. Water has a pH level of 7. Substances with pH levels under 7 are categorized as acidic. Vinegar is acidic.

Explanation:

You can change it a little if you want. Hope this helps!

Vinegar is acidic. The only vinegar that has alkaline is apple cider vinegar, but all types of vinegar are acidic.

Answer:

The concentration of hydrochloric acid would be estimated to be less.

Explanation:

This is because, the hydroxyl ions from water react with the hydrogen ions from the hydrochloric acid, hence decreasing the moles of hydrogen ions which lowers the acidic strength of Hydrochloric acid.

If water was used to rinse the burette and the burette is then used to dispense hydrochloric acid solution, the final estimate of hydrochloric acid concentration will be less.

It is usual to rinse the burette with the solution that ought to be in it after rinsing it with water.

However, in this case, the burette was was rinsed with water alone and then it was used to dispense the hydrochloric acid solution.

The water will dilute the hydrochloric acid solution thereby making the final estimate of hydrochloric acid concentration to be less.

Hence, if water was used to rinse the burette used to dispense the hydrochloric acid solution, the  final estimate of hydrochloric acid concentration will be less.

Learn more: https://brainly.com/question/19131363

Answer:

50%

Explanation:

This is a simple one trait Punnett square.

Because we know that the recessive trait is blue (yy) thanks to the text mentioning SpongeSusie being blue and recessive. Spongebob is yellow with a genotype of Yy or heterozygous. So we need two y to make a blue baby.

Yy X yy = 50% yellow Yy and 50% blue yy

Answer:

Please find the report on the comet below

Explanation:

Specifically in the year 1993, a comet was discovered by three individuals namely: Eugene Shoemaker, Carolyn Shoemaker, and David Levy. The comet was named after the first discoverers as; Shoemaker-Levy 9.

Shoemaker-Levy 9 was reported to have already been in pieces as at the time of discovery. It was believed to have been torn apart by the gravitational force emanating from the biggest of the planets called JUPITER.

In July 1994, Shoemaker-Levy 9 came in contact with Jupiter in what seemed to be the end of the discovered comet. This collision of Shoemaker-Levy 9 with planet Jupiter was said to be the first ever solar systems collision observed.

The group of choices associated with the questions is as follows:

A) 1.00 L He

B) 5.00 L CO2

C) 9.00 L H2S

D) more than one correct response

E) no correct response

Answer:

The correct answer is - A) 1.00 L He

Explanation:

According to the Boyles law, the pressure of the gas is inversely proportional to the volume of the gas at a constant temperature which means if the pressure increases then the volume will decrease and vice versa.

The equation of Boyle's law :

P1V1=P2V2

and V1 = P2V2/P1

Placing the value

V1 = 3*1/3

V1 = 1 L

thus, there is only one option has one liter that is A) 1.00 L He

Answer:

Explanation:

CO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms. Silicon does not form double bonds with oxygen. ... because of this reason co2 is gas but sio2 is solid.

Hope that helps you Buddy ...

Take care...

Buhbye!

Answer:

.....

Explanation:

D0wnload Phot0Math......................

Answer:

A

Explanation:

A scientist is a person who conducts scientific research to advance knowledge in an area of interest.

In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. It was not until the 19th century that the term scientist came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833.

examples are

Answer:

COPPER , SILVER, GRAPHITE, WATER , POTASSIUM , LEAD AND .........ETC

Explanation:

Answer:

1. This reaction is (A) Exothermic .

2. When the temperature is decreased the equilibrium constant, K: (A) Increases

3.When the temperature is decreased the equilibrium concentration of Co2: (A) Increases

Explanation:

[tex]CoCl4^2-(aq) <--> Co_2+(aq) + 4Cl^-(aq)[/tex]

1. The pink color predominates at low temperatures, indicating that the commodity is preferred.

This is a reaction that is exothermic.

2. As the decrease in the temperature , the equilibrium constant , K ;

      equilibrium constant = [tex]\frac{product}{reactant}[/tex] =[tex]\frac{[CO^2^+][Cl^-^4]}{CoCl^2^-_4}[/tex]

As the temperature drops, the concentration of[tex]Cl^-[/tex] and [tex]CO^2^+[/tex] rises, and K rises as well , thus it increases .

3. The equilibrium concentration of [tex]CO^2^+[/tex] decreases as the temperature decreases:

When the temperature is lowered, the equilibrium shifts to the right , that is it increases.

Answer:

a) water expands when it freezes and damages the cell wall.

Explanation:

We know that most liquids expand when heated and contract when cooled. Water does not behave in the same way.

Water contracts on cooling from any temperature until 4°C when it begins to expand until 0°C. Hence a given mass of water has its least volume and highest density at 4°C.

Hence, fresh vegetables with high water content do not freeze well because water expands when it freezes and damages the cell wall.

Answer:

Precipitation reactions are ones in which at least one of the reactants is in the aqueous phase (i.e., dissolved in water), and a solid forms on the product side which was not present on the reactant side. If all the reactants are solid, then a solid product forming should not be called a precipitate. To be called a precipitate, an insoluble product must form from within solution, either from a solid and solute interacting, or from an interaction strictly between solutes.

Explanation:

Answer:

In order to determine the oil content of different types of potato crisps (chips), a student weighed 5.00 g of crushed crisps and mixed them with 20.0 cm3 of non-polar solvent. She assumed all the oil in the crisps dissolved in the solvent. The student then filtered the mixture to remove any solids, and gently heated the solution ...

Explanation:

Student needed a non polar solvent to determine the content of oil due to non polar nature of oil.

Those solvents in which within the molecule positive and negative ends are not present will describe as a non polar solvents.

Molecules will dissolve in same kind of solvent by the concept of like dissolves like, means polar molecules dissolve in polar solvents and non polar molecules will dissolve in non polar molecules. Oil is a non polar molecule thats why in the experiment to determin the oil content or to dissolve oil of crisps in the solvent he had used non polar solvent.

Hence due to non polar nature of oil, student used non polar solvent.

To know more about non polar solvents, visit the below link:

https://brainly.com/question/15096248

Answer:

a. decrease the amount of the common ion in the system

Explanation:

The correct option is - a. decrease the amount of the common ion in the system

Reason -

Adding a common ion decreases solubility, as the reaction shifts toward the left to relieve the stress of the excess product.

Adding a common ion to a dissociation reaction causes the equilibrium to shift left, toward the reactants, causing precipitation.

Answer:weather

Explanation:

Answer:

[Kr] 4d4 5s1

Explanation:

Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The chemical symbol for Niobium is Nb. Neutron Number and Mass Number of Niobium Mass numbers of typical isotopes of Niobium are 93.

Name of Element : Niobium

Atomic Weight : 92.9

Atomic Number : 41

Group : Transition Elements

Electron Configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d3

Answer:

a. 0.026 M

Explanation:

Molarity is a measure of the molar concentration of a solution. It can be calculated by using the following formula:

Molarity = n/V

Where;

n = number of moles (mol)

V = Volume of solution (L)

Based on the information provided;

V = 23.2mL = 23.2/1000 = 0.0232 L

n = ?

To get the number of moles of KHP, we use the formula:

mole = mass/molar mass

mole (n) = 0.123/204.2

mole (n) = 0.0006024mol

Molarity = n/V

Molarity = 0.0006024 ÷ 0.0232

Molarity = 6.024 × 10^-4 ÷ 2.32 × 10^-2

Molarity = 6.024/2.32 × 10^(-4--2)

Molarity = 2.59 × 10^-2

Molarity = 0.026 M

Answer:

c

Explanation:

________________________________

Using ideal gas law–

We'll use formula,

PV = nRT

Where,

P, Pressure = 1.40 atm

V, Volume = 42.4 L

n, Number of moles = ( To find ) ?

T, temperature = 25°C

R, Ideal gas constant = 0.08206 L . atm/k. Mol

________________________________

Here, PV = nRT

Or, PV / RT = n

Or, [tex] \frac{1.40 \: atm \times42.4 \: litres }{298 \: k \: \times 0.08206 \: l.atm /k \: .mol} = n[/tex]

Or, n = 2.43 Moles.

Or, n = 2.43 Moles.

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I had to take help from my elder brother.

We tried our best, hope it helps you.

By– Debasis ( feat – Apollo)

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