Which option correctly shows the concentration of H3O+ ions in pure water?

7 mol/L

1.0 × 10-7 mol/L

1.0 x 10-14 mol/L

14 mol/L

Answer:

I dont understand what the question means

Explanation:

Answer:

the UV exposure is my guess

accretion disk- does not spin

solar system- a central star with planets around it

solar nebula- may form after a supernova

Hope this helps!!

Answer:

C.

The air pressure creates a vacuum in the straw that pulls the air into the liquid.

Answer:

maybe all the basic oxide i guess

Explanation:

cuo + hcl -> cucl2 + h20

...

The reaction of zinc oxide with hydrochloric acid is as follows:

The reaction of zinc chloride with hydrochloric acid represents an example of a neutralization reaction. This reaction significantly forms zinc chloride which is a salt and water.

According to the context of this question, the desired product of the given reaction forms the salt. In this reaction, zinc oxide acts as a base while hydrochloric acid is the strongest acid.

When acid reacts with bases, the product formed is called a salt, so zinc chloride is a salt. This is because it is one of the characteristic properties of acid.

Therefore, the desired product of the reaction of zinc oxide with hydrochloric acid is well described above.

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Answer:

.

Explanation: man that's okay

Answer:

Because it is!

Explanation:

Hurricanes was the one of the big natural disaster . Yes, it was true and it is in the book of mythology.

It was so destructive primarily because levees around New Orleans, Louisiana failed. Levees are water barriers built to prevent flooding (parts of New Orleans have an elevation that is lower than sea level). When the levees failed, huge areas of the cities flooded.

Water is in constant motion, moving from the ocean to the sky to the earth. Flooding is a natural event which occurs when water overflows a stream, river or drain. Floods are caused by rainfall, melting snow or ice, or by the failure of structures such as dams.

There are main four parts  of water cycle . i.e. evaporation , convection , precipitation and - collection.

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The hydrolysis of  N,N-diethyl-m-toluamide yields 3-methylbenzoic acid which easily biodegradable.

The insecticide repellent N,N-diethyl-m-toluamide is used to repel rather than kill insects. It functions by interfering with the ability of the insects to detect body heat and skin chemicals. In a nutshell, it confuses the receptors in the insect.

The hydrolysis of N,N-diethyl-m-toluamide  yields 3-methylbenzoic acid and diethylamine as the products. This is important because the 3-methylbenzoic acid is not an environmental concern since it is readily biodegradable and does not accumulate significantly in living organisms. It has also not been found to be mobile in soil and water. Environmental concerns are always a prime consideration in assessing chemicals for use.

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This question involves the simple concept of percent by volume in a solution.

The volume of ethanol present in the bottle is found to be "48.75 ml".

The percent by volume of a solution means the amount of that substance present in the solution, represented as a fraction of the total volume of the solution. Hence, the volume of ethanol present in the bear can be found by using the following formula:

[tex]Percent\ by\ Volume\ of\ Ethanol = \frac{Volume\ of Ehanol}{Total\ Volume\ of\ Beer}(100\ \%)\\\\6.50\ \% = \frac{V}{750\ mL}(100\ \%)\\\\V = \frac{(6.50\ \%)(750\ mL)}{100\ \%}[/tex]

V = 48.75 mL

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uihehdhdhjbsjwiiqbs vs

Answer:

g/kg

Explanation:

they are both a unit of weight

notice how the others have a unit of weight and then measurement? g/kg are two units of weight

Answer:

Grams/kg

Explanation:

Answer:

Explanation:

where anwser

Answer:

Q1) 0,1276 M

Molair mass of NaOCl = 74,44 g/mol

You have 9,5 g/L.

You need to calculate with the molar mass, how many moles 9,5 g are:

9,5 g / 74,44 g/mol = 0,1276 molAR

0,1276 mol / 1 L = 0,1276 M

Q2) 27.78  grams

The  mass    ca(Oh)2  needed  to  produce  1.5 l  of  0.25 solution  is  calculated  as follows

find  moles

=moles   = molarity   x  volume

moles is therefore =   1.5  x 0.25  =  0.375  moles

mass  =  moles  x  molar  mass

0.375mol  x  74.09 g/mol  =  27.78  grams

Explanation:

NOW MARK ME AS THE BRAINLIEST

Answer:

Which of the following is a possible set of quantum numbers for a 3p orbital?

Since you are dealing with a 3p-orbital, your principal and angular momentum quantum numbers will be n=3 and l=1 .

Answer:

10.57

Explanation:

pOH = pKb + log(acid/base)

The mass of glycerol to that would need to be combusted to heat 500.0g of water from 20.0°C to 100.0°C is; 9.32 grams.

We must establish the fact that energy is neither created nor destroyed.

Therefore, the amount of heat absorbed by water is equal to the amount of heat released by the combustion of glycerol.

Total heat absorbed by water, H(water) is;

Q(water) = m C (T2 - T1)

Q(water) = 500 × 4.184 × (100-20)

Q(water) = 167.36 kJ

Consequently, the quantity of heat evolved by the combustion of glycerol is;

Q(glycerol) = 167,360 J = n × ΔH°comb

where, n = no. of moles of glycerol.

167.36 kJ= n × 1654 kJ/mole

n = 167.36/1654

n = 0.1012 moles of glycerol.

Therefore, mass of glycerol combusted, m is;

m = n × Molar mass

m = 0.1012 × 92.09

m = 9.32 g.

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Answer:

The answers are all small.

Explanation:

They are all small because a asteroid has a small amount of energy and produces a small amount a small crater. A small crater was likely formed by a small asteroid.

Answer:

c

Explanation:

because of the law of gravity

Answer:

8 is the answer.

Explanation:

100,000,1000

= 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10

= 10^8

Answer:

Solar radiation is radiant energy emitted by the sun from a nuclear fusion reaction that creates electromagnetic energy.  About half of the radiation is in the visible short-wave part of the electromagnetic spectrum. The other half is mostly in the near-infrared part, with some in the ultraviolet part of the spectrum.

Explanation:

Hope it helps

stan twice

Answer              A

Explanation:

Answer:

for instance :

water , H²O , and hydrogen peroxide . H²O² , are alike

in that their respective molecules are composed of hydrogen and oxygen atomd . hope its helpful . Good luck :)

Answer:g

Explanation:

g

Answer:

I know some of them...

Explanation:

1. What was the purpose of the experiment?

Type your answer here: The purpose of this experiment is to show that a cell membrane is a type of barrier, and is permeable to some substances, but may not be permeable to all substances.

2. What were the independent, dependent, and control variables in your investigation? Describe the variables used in the part of the experiment with the eggs.

Type your answer here: Independent variable / Manipulated variable: Refers to all the variables in an experiment that provoke a response in another variable. This variable is modified during the experiment to analyze how another variable responds to it. The researcher wants to study how the changes in these variables affect the dependent variable.  The researcher can change these variables to see what changes it implies in an object, process, trait, or anything that depends on them.

Dependent variable / Responding variable: Its response depends on any change in the independent variable. The dependent variable is the one that is being investigated, studied, and measured. It represents a quantity of something which value depends on how the independent variable is modified. It is usually identified by the letter Y.  A change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. In the exposed example, the dependent variable is the egg circumference.

Constants / Controlled variables: Refers to those variables in an experiment that are controlled and have no influence on the results. These variables do not affect the change in the dependent variable values. In the exposed example the use of the lid to seal the jar and the amount and concentration of vinegar might be considered as a controlled variable. These elements are used but do not provoke any change in the size of the egg.

thats it... CAN SOMEONE ANSWER THE OTHERS?! I NEED ITT

Answer:

Organ system

Explanation:

Answer:

1. follow

2. corellation

3.does

Explanation:

i dont know for sure but I think those are the answers cause the two lines look around the same.

Answer:

Destroyed.

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.