What two layers in the atmosphere protect us?

Answer: A.

Explanation: When light passes through a small hole, it creates an inverted image on the opposite side. In this case, since the arrow is pointing up, the inverted image will appear pointing down on the opposite wall. Furthermore, since the box has a hole on its left side, the inverted image will be shifted towards the left.

Answer:

The valence electrons in the metal atom in the lattice structure can delocalize and move freely. The electrons are "loosely" connected with their parent atom in the metallic bond because most metals have excess electrons in their outer orbitals above the stable configuration.

Answer:

I think the answer is the 3rd one

Answer:

Explanation:

The strong absorption at 3350 cm−1 indicates the presence of an O-H group, while the absorption at 1100 cm−1 indicates the presence of a C-O bond. Based on this information and the molecular formula C5H10O, the most likely structure for the compound is cyclopentanol, which has the molecular formula C5H10O and contains both a C-O bond and an O-H group.

Therefore, the correct answer is (A) Cyclopentanol.

The answer choices (B) C-H and (C) Hydrogen bonding are not directly related to the given information about the absorption spectra and the molecular formula of the compound. The answer choice (D) 2500-3300 cm-1 is a range of absorption frequencies for N-H and O-H stretching vibrations, but the given information only refers to the absorption at 3350 cm−1, which is within this range and indicates the presence of an O-H group in the compound.

The compound with molecular formula C5H10O and strong absorption at 1100 and 3350 cm−1 is most likely Cyclopentanol, indicated by the presence of a hydroxyl group and C-O stretching.

The molecular formula C5H10O represents a compound with 5 Carbon atoms, 10 Hydrogen atoms, and 1 Oxygen atom. Given the absorption bands at 1100 and 3350 cm−1 within the infrared spectrum, the compound is most likely to be Cyclopentanol. The strong absorption at around 3350 cm-1 suggests the presence of an hydroxyl (—OH) group, characteristic for alcohols. The 1100 cm−1 peak can be attributed to C-O stretching. The structure of Cyclopentanol includes a five-member ring of carbons with the OH group attached to one of the carbons.

https://brainly.com/question/31308392

#SPJ2

Answer:

Use calculator but first group them one by one and open the bracket by solving them accordingly

The number we get by this operation is 0.016. This number can be taken based on the rules for significant figures.

The number of significant figures is the number of digits that are known with certainty plus the last one having some uncertainty. All non zero values are significant and zero preceding first non zero digit is not significant .

For example in 65000, there are only two significant figures.  Similarly in 0.08 only one significant digit is present. Now when we multiply two decimal numbers, the result can only have as many decimal places as there are in the value with fewest decimal places.

First, multiply the numbers inside the bracket.  As per the above rule, the result should contain only two decimal places.

(0.08 ×200×0.004) = 0.06

Multiply by 65000 - 0.06×65000 = 3900

Now divide it by the multiplication product (800× 300), 240000 we get as follows:

3900÷240000 = 0.016

Hence the result of this operation is 0.016.

To learn more about significant figures, refer the link below:

https://brainly.com/question/17396594

#SPJ2

You have prepared a 1.0 M solution of \(CaCl2\) in the laboratory the concentration of chloride ions in the solution is 1.5 M.

Solution is defined as huge amount of solute dissolved in solvent. The proportion of solute is limited and after reaching at the point of saturation no more solute will be mixed in the solvent. It is impossible to separate solvent and solute from eye.

Pressure plays a important role in rate of reaction to increase the pressure it increases the rate of reaction by increasing the collision.

Pressure increase the concentration of gases it means that it increases the number of molecules per unit volume due to this collision of gases increases this will increase the temperature. This increase of  temperature will increase the rate of reaction.

Therefore, you have prepared a 1.0 M solution of CaCl2 in the laboratory the concentration of chloride ions in the solution is 1.5 M.

Learn more about solution here:

https://brainly.com/question/7932885

#SPJ2

Answer:

74g.

Explanation:

The volume won't increase by the volume of salt you added, though. This is for many different reasons among them the fact that salt is in grains (with lots of air in between) and the salt dissolving in the water and kind of squeezing in the spaces between water molecules. But the mass should increase by exactly the 19g you added.

Answer:

30

Explanation:

I’m pretty sure it is

Answer:

Explanation:

Here, we want to select the most important information piece to determine saturation

The best way to check for this is to check the kind of bonds between the carbon atoms in the molecule

When there are double or triple covalent bonds between the carbon atoms, then, we can be sure that there is a degree of unsaturation (alkenes, alkynes)

If we have single bonds only, then the molecule is saturated

Answer:

Any individual offspring produced through asexual reproduction is always: genetically identical to its parent. made up of cells with a cell wall. different from all of its siblings

The approximate bond angle for the H-C-H bond in CH3OH is approximately 109.5 degrees. In CH3OH, the central atom is carbon and it is surrounded by four other atoms - three hydrogens and one oxygen.

The molecular shape of CH3OH is tetrahedral, with the carbon atom at the center and the three hydrogens and one oxygen atom bonded to it. The H-C-H bond angles in CH3OH are approximately 109.5 degrees, which is the ideal bond angle for a tetrahedral shape. This is because the four electron pairs around the central carbon atom repel each other, and the molecule takes a shape that minimizes this repulsion. However, the H-O-H bond angle in CH3OH is slightly less than 109.5 degrees, at around 104.5 degrees. This is due to the lone pairs of electrons on the oxygen atom, which repel the bonding pairs of electrons and cause the H-O-H bond angle to deviate from the ideal tetrahedral angle. The bond angles in CH3OH are determined by the molecular shape and the repulsion between electron pairs. The H-C-H bond angles are approximately 109.5 degrees.

To know more about the central atom

https://brainly.com/question/30080445

#SPJ11

The chemical reaction is called hydrolysis, which is a type of catabolic reaction. "Hydro-" means that water is used and "-lysis" means to break down. Thus, hydrolysis is a process that uses water as a resource to break down ATP into ADP and phosphate..

A chemical reaction is a process in which one or more substances are changed into one or a different substance and produce new products. Substance is a chemical element or compound. Chemical reactions rearrange reactant atoms to make different substances.

Because of the many chemical reactions that occur around us, a form of chemical equation is created to make it easier for humans to express chemical reactions. A chemical equation is a mathematical statement that represents the formation of products from the reactants and also states the specific conditions under which the reaction occurs.

The reactants are on the left side, while the products formed are on the right side and are connected by arrows. For example, A+B➡️C+D

From the equation above, you can see that A and B are reactants that react and form products C and D. In actual chemical equations, reactants are denoted by their chemical formulas. Based on the conservation of mass, the chemical equation must be balanced, that is, the number of atoms on both sides must be the same.

Learn more about chemical reaction at https://brainly.com/question/11314881.

#SPJ4

Yes. All matter is made of atoms in some way. Even the smallest crumbs are made of quadrillions of atoms. The number of atoms is simply mind boggling.

1 quadrillion = 1,000,000,000,000,000

There are 15 zeros in that number. It might be better to express it as

1 quadrillion = 1.0 * 10^15

Scientific notation compacts large numbers such as this to make it more readable, and allow for faster writing.

Cleaning supplies for spills should always be disposed of as hazardous trash. Therefore, it is necessary to store and package items like sorbent materials and cleaning supplies for the disposal of hazardous waste.

The term "equipment" most frequently refers to a group of items or other things that are regularly employed to accomplish a certain goal. Equipment needs vary depending on the work.

The plural form of the word equipment is absent. There is no term "equipments," it is only used in the singular, and it goes with a singular verb. There are about 100 common words in this category, which are referred to as "noncount nouns" or "mass nouns."

To know more about Equipment visit:

https://brainly.com/question/30230359

#SPJ4

Answer:

\(CH_{4} O_{2}\)

Explanation:

The empirical formula is the simplest whole-number ratio of the elements in a compound to one another. To find the empirical formula given a molecular formula, divide all the subscripts by their greatest common factor.

3, 12, and 6 can all be divided by 3, which makes the empirical formula \(CH_{4} O_{2}\)

Answer: 45

Explanation:

mass number = number of protons and neutrons

atomic number = number of protons

to find neutrons subtract atomic number from mass number

so 80 - 35 = 45 neutrons

Answer:

1. HCL, NaI

2. NaCl, KCl

3. CCl4

4. Has a high pH

Explanation:

1. water is polar, and like dissolves like

Hydrochloric acid (HCL) is polar therefore it will dissolve in water

Sodium Iodide (NaI) is also polar therefore it will dissolve in water

Ethane (C2H6) Is non-polar therefore it won't dissolve in water

Oil Is non-polar therefore it won't dissolve in water

2. Same as number 1, because water is polar, the substance has to be polar as well to dissolve in it

Carbon tetrachloride (CCl4) is non-polar therefore it won't dissolve in water

Sodium Chloride (NaCl) is just a fancy name for table salt, what you season food with, it is also Polar therefore it will dissolve in water

Methane (CH4) is non-polar gas, at a normal concentration it won't dissolve in water, at a low enough concentration meeting the correct requirements it can dissolve but for the purpose of your question it will not

Potassium chloride (KCl) is polar therefore it will dissolve in water

3. Gasoline is non-polar therefore non-polar substances will dissolve in gasoline

Carbon tetrachloride (CCl4) is non-polar therefore it will dissolve in gasoline

Sodium Chloride (NaCl) is just a fancy name for table salt, what you season food with, it is also Polar therefore it won't dissolve in gasoline

Sodium hydroxide (NaOH)  is very polar therefore it won't dissolve in gasoline

Potassium chloride (KCl) is polar therefore it won't dissolve in gasoline

4. Not a characteristic of an acid

An acid is a proton donor therefore it can't be that

An acid has a pH value of less than 7 therefore it can't be that either

Based on our previous statement we know that this has to be our answer- Has a high pH

AN acid donates Hydrogen ions which is the same as releasing Hydrogen ions

Answer:

Rate cup 1: 36.00 tsp/h.

Rate cup 2: 59.50 tsp/h.

Rate cup 3: 70.13 tsp/h.

Explanation:

Based on the given example, the units must be in tsp/hour. To do this we just have to divide tsp by seconds and then convert it to hours remembering that 1 hour equals 3600 seconds.

Let's calculate each case:

- Cup 1: 1 tsp, 1 minute 40 seconds. Remember that 1 minute equals 60 seconds, so 1 minute and 40 seconds equals 100 seconds. The calculation of the rate will look like this:

The rate of cup 1 is 36.00 tsp/h.

- Cup 2: 2 tsp, 2 minutes 1 second. As we saw before 1 minute equals 60 seconds, so 2 minutes equals 120 seconds. 2 minutes and 1 second equals 121 seconds. The rate of cup 2 will be calculated as:

The rate of cup 2 is 59.50 tsp/h.

- Cup 3: 3 tsp, 2 minutes 34 seconds. 2 minutes are the same that 120 seconds, so 2 minutes 34 seconds equals 154 seconds. The rate of cup 3 is calculated as follows:

The rate of cup 3 is 70.13 tsp/h.

Answer:

That means that mixture is HeteroGeneous.

Explanation:

Hope this Helps!

The number of moles in 7.52 × 10²² molecules of silicon dioxide is 0.125 moles.

The number of moles in a substance can be calculated by dividing the number of molecules by Avogadro's number as follows:

no of moles = no of molecules ÷ 6.02 × 10²³

According to this question, a sample of silica gel (SiO₂) contains 7.52 x 10²² molecules of silica. The number of moles can be calculated as follows:

no of moles = 7.52 × 10²² ÷ 6.02 × 10²³

no of moles = 1.249 × 10-¹

no of moles = 0.125moles

Therefore, 0.125 moles are present in 7.52 × 10²² molecules of silica.

Learn more about no of moles at: https://brainly.com/question/14919968

#SPJ1

Answer:

There are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Explanation:

Because pH is a logarthmic scale, we can use the formula:

[

H

+

]

=

10

-pH

. Where...

=>

[

H

+

]

is the concentration of hydrogen ions in the solution.

=>

p

H

is the pH of the solution.

=> Where

10

is the base of the power - it's a logarithm formula.

We can now just sub in the values and solve for [

H

+

]

.

[

H

+

]

=

10

-pH

=

10

−

(

12.83

)

=

1.479108388

×

10

−

13

We can round (if required) to

1.479

×

10

−

13

.

Thus, there are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Hope this helps :)

Answer:

insoluble substances

Explanation:

Answer:

Initial volume of the container (V1) = 1.27 L (Approx)

Explanation:

Given:

Number of mol (n1) = 5.67 x 10⁻²

Number of mol (n2) = (5.67 +2.95) x 10⁻² = 8.62 x 10⁻²

New volume (V2) = 1.93 L

Find:

Initial volume of the container (V1)

Computation:

Using Avogadro's law

V1 / n1 = V2 / n2

V1 / 5.67 x 10⁻² = 1.93 / 8.62 x 10⁻²

V1 = 10.9431 / 8.62

Initial volume of the container (V1) = 1.2695

Initial volume of the container (V1) = 1.27 L (Approx)

Answer: 1.27 L

Explanation:

First, calculate the final number of moles of propane (n2) in the container.

n2 = n1 + nadded = 5.67 × 10^−2 mol + 2.95 × 10^−2 mol = 8.62 × 10^−2 mol

Rearrange Avogadro's law to solve for V1.

V1 = V2 × n1 / n2

Substitute the known values of n1, n2, and V2,

V1 = 1.93 L × 5.67 × 10^−2 mol / 8.62 × 10^−2 mol = 1.27 L

The objectives for Treads' online sales can be improved by focusing on key areas such as improving the user experience, composition effective marketing strategies, and ensuring customer satisfaction.

To vastly increase sales of Treads' products, it is important to create a seamless and user-friendly online platform for customers to browse and purchase products. This can be achieved by ensuring fast loading speeds, easy navigation, and simple checkout processes.

In addition to this, implementing effective marketing strategies can help to increase brand awareness and attract new customers to the platform. This can be done through various digital marketing channels such as social media, email marketing, and search engine optimization.

To know more about composition visit:

https://brainly.com/question/9477180

#SPJ11

Answer:

Gravity

Explanation:

The species H30* and OH are also present in the beaker along with the water molecule, making option a correct. In contrast, a beaker of acidic solution raises [OH-] over [H30+1].

To determine  acidic solution is, the pH is an important parameter. The pH determines how many hydrogen ions are present in the solution. The pH of 7 distinguishes between neutral and acidic solutions. The pH scale displays basic solutions above 7, and acidic ones below 7. Chemical bonds, also known as attractive forces, hold two or more atoms together to form molecules, which, depending on the context, may or may not also include ions.

Learn more about acidic solution here

https://brainly.com/question/13208021

#SPJ4