How many atoms of each element in the compound 2(PO4)

Answer:

B. False

Explanation:

All the atoms of an element are not entirely the same no matter where they are found.

The phenomenon of isotopy brings a different perspective to the identity of an element.

Answer: The loose objects will tend to move to the right inside the car.

Explanation:

The options include:

A. The loose objects will tend to move to the left inside the car.

B. The loose objects will tend to move to the right inside the car.

C. The loose objects will tend to move toward the front of the car.

D. The loose objects will tend to move toward the back of the car.

Based on the question, we are informed that Mary is driving on a straight road and then a deer jumps in front of her, which made her turn her car sharply to the left.

The loose objects inside the car will move towards the opposite direction. Since Mary made a left turn, the loose objects in the car would move to the right.

Answer:

1280L

Explanation:

Given parameters:

Initial pressure  = 0.727atm

Temperature  = 26.9°C

Initial volume  = 726mL  = 0.726L

New pressure  = 0.412atm

Unknown:

New volume of the gas sample  = ?

Solution:

To solve this problem, we apply boyles law;

            P1V1  = P2V2

P and V are pressure and temperature

1 and 2 are initial and new state

             0.727 x 0.726  = 0.412 x V2

                   V2  = 1.28mL  = 1280L

Answer:

a fossil

Explanation:

Answer:Fossil

Explanation:A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embedded, and preserved in the Earth's crust, usually in stratified rock.

Answer:

(B) It is tetrahedral because there are four bonded pairs around carbon

Explanation:

CCl4 means four chloride ions bonded covalently with single carbon.

its coordination figure is:

CF =  1/2(Vallence of central atom + electrons donated from substituents - charge)

CF = 1/2(4 + 4.1 - 0)

CF = 4

Bond electrons = 4

Lone pair electrons = 0

Hence, CCl4 is tetrahedral

Answer:

the rising and falling of the surface of the ocean caused twice daily by the attraction of the sun and the moon

Explanation:

Answer:

The formula unit for beryllium oxide is BeO

Explanation:Mark me as brainliest

Answer:

63.6%

Explanation:

The given compound is:

     N₂O;

The problem here is to find the percent composition of nitrogen in the compound.

First find the molar mass of the compound:

 Molar mass of N₂O = 2(14) + 16  = 44g/mol

So;

 Percentage composition of Nitrogen  = [tex]\frac{2 x 14}{44}[/tex]  x 100  = 63.6%

Answer:

90 Minutes

Explanation:

Original concentration = 120 mg

Half life = 30 minutes

Minimum level = 15 mg

Basically, we are to calculate the time it would take to drop from 120 mg to 15 mg.

The half life of a substance is the time it takes for the original concentration of a substance to drop to half it's starting concentration.

First Half life:

Starting concentration = 120mg

Concentration after half life = 120 / 2 = 60 mg

Second Half life;

Starting concentration = 60 mg

Concentration after half life = 60 / 2 = 30 mg

Third Half life;

Starting concentration = 30 mg

Concentration after half life = 30 / 2 = 15 mg

We have reached the minimum 15 mg level. This means it took three half lives to get there.

Total time taken = No of Half lives * Half life duration = 3 * 30 mins = 90 Minutes

Answer:

B. Carbon shares 2 pair of electrons with each oxygen.

Explanation:

Hope it helped!

It attempts to explain the idea that:C. energy is quantized

Answer:  C. The particles in salt water are spread throughout.

Explanation:

Homogeneous mixtures: It is a mixture that has uniform composition throughout the solution and the particle size or shapes are not different. There is no physical boundary between the dispersed phase and dispersion medium.  Example: Salt dissolved in water.

Heterogeneous mixtures: It is a mixture that has non-uniform composition throughout the solution and the particle size or shapes are also different.  There is a physical boundary between the dispersed phase and dispersion medium. Example: sand in water.

Answer:

Its c

Explanation:

A solution is a mixture where one substance is dissolved in another. One example of a solution is salt water. Why does salt water appear to be a single substance even though it contains more than one substance. Got it right in school city

Answer:

C

Explanation:

so the way that waves are created normally is by slight breezes the stronger the breeze the bigger the wave so if strong winds are produced  it will result in large waves

Hope this helped you and check out my YT my most popular video at Ryetube ExTrEmE

Answer:

159571 lb or cubic feet

Explanation:

Answer:

Its electrical to thermal energy

Explanation:

Answer: D . Animals with more complex brains have a greater capacity to learn.

Explanation:

The different parts of the brain are responsible for distinct processes like thinking, control of behavior, learning, reasoning, speech, emotions, muscle movements, controls balance, and others. This aids in the fact that complex the brain more different functions it can perform. The large brain size as well as volume is associated with better cognitive functions along with complexity. The specific regions of the brain that can be correlated with the volume as well as intelligence are temporal, parietal and frontal parts of the brain in animals and in humans.

Answer:

B: It is extremely reactive

Explanation:

Potassium metal is also soft and white with a silvery lustre, has a low melting point, and is a good conductor of heat and electricity.

Answer: Properties, occurrence, and uses. Potassium metal is soft and white with a silvery lustre, has a low melting point, and is a good conductor of heat and electricity. Potassium imparts a lavender colour to a flame, and its vapour is green.

Explanation: hope it helps

Answer:

have a p000000000000000000

Answer:

SF4 -Covalent bond

BaBr2 - Ionic bond

Ca - Metallic bond

Explanation:

Sulphur and fluorine are non metals. Nonmetal atoms combine by the sharing of electrons. This is also called a covalent combination(bond).

In BaBr2, a metal is combined with a nonmetal. This combination involves a transfer of electrons from the metal to the nonmetal forming an ion pair. This is otherwise called an ionic bond.

Atoms of a metal are held together by strong metallic bonds that involves positively charged cations and a cloud of electrons.

Answer:

3.39 x 10²³ particles

6.02 x 10²²particles

Explanation:

The problem here entails we find the number of particles in the given substances.

From the mole concept;

          1 mole of a substance contains 6.02 x 10²³ particles

a. 18g of O₂;

 We first find the number of moles of this substance first;

       Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  Molar mass of O₂   = 2(16) = 32g/mol

      Number of moles  = [tex]\frac{18}{32}[/tex]   = 0.56mole

 So;

             1 mole of a substance contains 6.02 x 10²³ particles

            0.56 mole of  O₂ will contain 0.56 x 6.02 x 10²³ particles

                                                                   = 3.39 x 10²³ particles

b. 0.1mole of calcium atom:

        1 mole of a substance contains 6.02 x 10²³ particles

       0.1 mole of the substance will contain 0.1 x  6.02 x 10²³ particles

                                                                         = 6.02 x 10²²particles

Answer:

It is called "periodic" because elements are lined up in cycles or periods. From left to right elements are lined up in rows based on their atomic number (the number of protons in their nucleus). ... Each horizontal row in the table is a period. There are seven (or eight) total periods.

Explanation:

Answer:

According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles and weighs equal to its molecular mass.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadros number}}[/tex]

a. moles in 14.08 g of [tex]C_{12}H_{22}O_{11}[/tex] = [tex]\frac{14.08g}{342.3g/mol}=0.04113moles[/tex]

molecules in 14.08 g of [tex]C_{12}H_{22}O_{11}[/tex] = [tex]0.04113\times 6.023\times 10^{23}=0.2477\times 10^{23}[/tex]

b. moles in 17.75 g of NaCl = [tex]\frac{17.75g}{58.5g/mol}=0.3034moles[/tex]

molecules in 17.75 g of [tex]NaCl[/tex] = [tex]0.3034\times 6.023\times 10^{23}=1.827\times 10^{23}[/tex]

formula units 17.75 g of [tex]NaCl[/tex] = [tex]0.3034\times 6.023\times 10^{23}=1.827\times 10^{23}[/tex]

c. moles in 20.06 g of  [tex]CuSO_4.5H_2O[/tex]= [tex]\frac{20.06g}{249.68g/mol}=0.08034moles[/tex]

formula units in 20.06 g of  [tex]CuSO_4.5H_2O[/tex]= [tex]0.08034\times 6.023\times 10^{23}=0.4839\times 10^{23}[/tex]

Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.\

so hope that helps and sooooo

Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.

Answer:

58.3%

Explanation:

The formula of the compound is given as:

     CsPO₄  

Now, the percentage composition of Cs in the compound is = ?

So;

To find this parameter, find the molar mass of the compound:

  Molar mass of  CsPO₄   = 132.9 + 31 + 4(16)  = 227.9g/mol

Percentage composition of Cs= [tex]\frac{132.9}{227.9} x 100[/tex]   = 58.3%

Answer:

True

Explanation:

True is the ANSWER.