CSC Unit 3
Question 28 of 33
Which of the following molecules has a trigonal-pyramidal shape?
A. SeF6
B. SO2
C. BH3
D. PH3

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Answer:

the periodic table is G.

The periodic table has the elements placed in the locations that match the information on the flash cards is F.

The term "periodic table" refers to an arrangement of all known elements in order of increasing atomic number and recurrent chemical attributes. The periodic table is organized into 118 elements.

The term "periodic table" can also refer to a table that lists all known chemical elements in rows and columns.

In the F table, L is found in alkaline earth metals while M is found in transition metals. M has more valence electrons than L, while L is more reactive than M.

Thus, the  periodic table has the elements placed in the locations that match the information on the flash cards is F.

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Answer:

1.7x10²³ Fluorine atoms are present

Explanation:

To solve this question we must know that, to find the amount of atoms of a substance from its mass, we have, as first, to convert this mass to moles using molar mass of the substance. With the moles we can find the amount of molecules using Avogadro's number. And with the formula we can know the atoms presents:

Moles Fluorine (F₂, Molar mass: 37.997g/mol)

5.3g * (1mol / 37.997g) = 0.139 moles F₂

Molecules F₂:

0.139 moles F₂ * (6.022x10²³molecules / mol) = 8.4x10²² molecules F₂

As 1 molecule of F₂ contains 2 atoms of Fluorine:

8.4x10²² molecules F₂ * 2 =

Answer:

black??

Explanation:

Answer: mP

Explanation:

Maritime polar forms cold water and the weather is cold and wet.

;)

Answer:

gas

Explanation:

particles are very far apart

The given diagram represents gaseous state of matter.  Both a volume and a definite form are absent from a gas. The separation of gas particles is great.

Solids, liquids, gases, plus plasma are the four states of matter that may be found in daily life. However, a number of additional states of matter have indeed been found.

Some of these additional states are created when a material transitions among two states of matter and doesn't actually exhibit the characteristics of either state. The most exotic are others. Both a volume and a definite form are absent from a gas. The separation of gas particles is great. The gas in a balloon and the air are two examples of gases. The given diagram represents gaseous state of matter.

Therefore, the given diagram represents gaseous state of matter.

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Answer:

i am doing this in science also i would like to know if u know

Explanation:

Answer:

C

Explanation:

The amount of energy in radio active decay will be released  2.25 × [tex]10^{17}[/tex]J.

The process of radioactive decay is the loss of energy through radiation from an unstable atomic nucleus. The term "radioactive" refers to a substance that contains unstable nuclei.

Calculation of energy which released in radioactive decay.

Given data:

M =  0.025 kg

E = ?

Energy of the radioactive decay can be determined by using the formula:

E= m[tex]c^{2}[/tex]

where, E is energy , m is mass and c is speed of light.

Put the value of given data in above equation.

E = (0.025) ×(3×[tex]10^{8}[/tex])∧2J

E = 0.025 × 9  × [tex]10^{18}[/tex].J

E = 0.225 ×  [tex]10^{18}[/tex].J

E= 2.25 × [tex]10^{17}[/tex]J

Therefore, The amount of energy in radio active decay will be released  2.25 × [tex]10^{17}[/tex]J.

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Explanation:

The particles of matter are continuously in motion due to which tehy collide with each other, and this creates a vibration in the solids

I hope it is correct ☺️

Answer:

the answer to this is 74 :)

Answer:

2Ag + CaCl2

Explanation:

https://en.intl.chemicalaid.com/tools/equationbalancer.php?equation=Ca+%2B+AgCl+%3D+Ag+%2B+CaCl2 use that website for chemistry

Answer:

0.02 g/ml

Explanation:

si dividimos 10 con 500, es decir, 10/500, obtenemos 0.02. Las unidades serán g / ml.

Answer:

Globular clusters are densely packed collections of ancient stars. Roughly spherical in shape, they contain hundreds of thousands, and sometimes millions, of stars. Studying them helps astronomers estimate the age of the universe or figure out where the center of a galaxy lies.

Explanation:

Answer:

700

Explanation:

How to find

Multiply the volume and pressure and divide the product by the temperature and the molar gas constant to calculate the moles of the hydrogen gas.

Solve: 204.83 × 27.88 / 8.76 = 651.901872146

Which is 651.90

In the nearest hundredths, the moles of gas is 700

The equilibrium constant of this reaction can be called the solubility product and is written as; Ksp = [Na^+] [Cl^-]

The term equilibrium constant refers to the number that shows the extent to which reactants are converted into products.

In this case, the equilibrium constant of this reaction can be called the solubility product and is written as; Ksp = [Na^+] [Cl^-]

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Among all the given options, option d is correct options. Fossil fuels developed from the organic remnants of ancient plants and animals.

Fossil fuels are vital natural resources, as is widely known. They provide significant benefits to humanity, and we depend on them for energy. However, using fossil fuels has drawbacks as well.

Fossil fuels developed from the organic remnants of ancient plants and animals. The heat and pressure of the crust caused Earth to transform these million-year-old leftovers into fuels that include carbon.

The need for energy only increased after the Industrial Revolution. Similar to that, these fuels have had the ability to generate enormous amounts of energy to meet this need.

Therefore, the correct option is option D.

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Answer:

Practical significance refers to the magnitude of the difference, which is known as the effect size. Results are practically significant when the difference is large enough to be meaningful in real life. ... Very small differences will be statistically significant with a very large sample size.

Explanation:

Hope it helps

FOLLOW MY ACCOUNT PLS PLS

In order to solve this, you will need to know how many moles of CaCl2 you will need, and to do so, you must look at the concentration of the solution.

You are told that the concentration of the solution is 0.19M, meaning that there is 0.19 moles of CaCl2 for every 1 liter of solution. However, you don't have 1 liter of solution, you have 445.2 mL. You must convert this to liters by dividing by 1000.

445.2 mL *  (1 L / 1000 mL) = 0.4452 L

Now, you can solve for how many moles the solution must have. Since M = mol / L and you are given M and L, you can set up an equality as follows:

0.19M = mol / 0.4452 L

Now, in order to find the number of moles, you multiply both sides by 0.4452L

0.19M * 0.4452 L = moles = 0.084588mol  

Now, you must calculate the molar mass of CaCl2 by using the periodic table

MM Ca = 40.078 g/mol

MM Cl = 35.452 g/mol

40.078 + (35.452 * 2) = 110.982 g/mol

Now you multiply the number of moles in the solution you calculated by the molar mass.

0.084588mol * 110.982 g/mol = 9.387 g CaCl2

Answer: 2175.68 J heat is required to increase the temperature of 20 grams of water by 26 degrees celsius.

Explanation:

Given: Mass = 20 g

Change in temperature = [tex]26^{o}C[/tex]

The standard value of specific heat of water is [tex]4.184 J/ g^{o}C[/tex]

Formula used to calculate the heat energy is as follows.

[tex]q = m \times C \times \Delta T[/tex]

where,

q = heat energy

m = mass of substance

C = specific heat of substance

[tex]\Delta T[/tex] = change in temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times \Delta T\\= 20 g \times 4.184 J/g ^{o}C \times 26^{o}C\\= 2175.68 J[/tex]

Thus, we can conclude that 2175.68 J heat is required to increase the temperature of 20 grams of water by 26 degrees celsius.

All the water on the earth is the same water that has been here since

All the water on the planet is the identical water that has been here since Penguins preen their feathers continually.

Feathers must be defended in prime condition to provide insulation and waterproofing.

Penguins groom with their bills. A gland around the bottom of the tail secretes oil that the penguin distributes throughout its feathers.

Penguins preen for several minutes in the water by stroking their bodies with their flippers while turning and twisting.

Penguins preen to maintain their feathers in head circumstances and are waterproof. On a well-groomed penguin, moisture rarely touches the skin.

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Answer:

[tex]\boxed {\boxed {\sf molarity \approx 0.722 \ M \ HCl}}[/tex]

Explanation:

Molarity is the concentration measurement equal to moles per liter.

[tex]molarity=\frac{moles}{liters}[/tex]

We have 26.0 grams of HCl and 1.00 liters of water. We must convert grams of HCl to moles.

To convert from grams to moles, the molar mass is used. Usually we find these values on the Periodic Table, but they are already provided. The molar mass of hydrochloric acid is 36.0 grams per mole. Use this number as a ratio.

[tex]\frac {36.0 \ g \ HCl}{ 1 \ mol \ HCl}[/tex]

Multiply by the given number of grams: 26.0

[tex]26.0 \ g \ HCl *\frac {36.0 \ g \ HCl}{ 1 \ mol \ HCl}[/tex]

Flip the ratio so the grams of hydrochloric acid cancel.

[tex]26.0 \ g \ HCl *\frac {1 \ mol \ HCl}{ 36.0 \ g \ HCl}[/tex]

[tex]26.0 *\frac {1 \ mol \ HCl}{ 36.0 }[/tex]

[tex]\frac {26.0}{ 36.0 } \ mol \ HCl = 0.72222222222 \ mol \ HCl[/tex]

Now we know the moles and liters.

Substitute these values into the molarity formula.

[tex]molarity = \frac {0.72222222222 \ mol \ HCl}{1.00 \ L }[/tex]

[tex]molarity = 0.72222222222 \ mol \ HCl/L[/tex]

The original measurements of grams and liters have 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place.

The 2 tells us to leave the 2 in the thousandth place.

[tex]molarity \approx 0.722 \ mol \ HCl/ L[/tex]

1 mole per liter is equal to 1 molar, or M. Change the units.

[tex]molarity \approx 0.722 \ M \ HCl[/tex]

The molarity of this solution is approximately 0.722 M HCl

Answer:

2.3 grams per cubic cm

Explanation:

Density is equal to mass over volume, so

23/10=2.3

Answer : Normally all molecular motions seizes at 0k which is -272oC so the temperature can't go below that

Explanation:

But, the rocks cracked because of too much expansion. Generally at night, water can be found within rocks which then evaporates during the day. And when water is cold or freezed it expands. So, as the water in the rock expands it causes an increase in size until a certain level where it can no more expand, it cracks.What causes the split of the rock is due to the expansion of water as it freezes

Answer:The answer is B

Explanation:

Answer:

5.12 m³

Explanation:

Using the combined gas law formula as follows:

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (m³)

V2 = final volume (m³)

T1 = initial temperature (K)

T2 = final temperature (K)

According to this question;

V1 = 5.0 m³

V2 = ?

P1 = 0.84 atm

P2 = 0.89 atm

T1 = 298 K

T2 = 323 K

Using

P1V1/T1 = P2V2/T2

0.84 × 5/298 = 0.89 × V2/323

4.2/298 = 0.89V2/323

Cross multiply

4.2 × 323 = 298 × 0.89V2

1356.6 = 265.22V2

V2 = 1356.6 ÷ 265.22

V2 = 5.12 m³