Help me with this....

Answer: Im not sure if you are doing this in your class.

Explanation:

So... for the element of MAGNESIUM, you already know that the atomic number tells you the number of electrons. That means there are 12 electrons in a magnesium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and two more in shell three

Answer:

a

Explanation:

a convection currents

Answer:

C is the answer to the question

Answer:

C. Diffusion or simple diffusion

Explanation:

I took the test

Answer: C3H8 + 5O2 = 3CO2 + 4H2O

Explanation:

1.  First start by writing out the unbalanced equation

2.  Count all the atoms on both sides of the equation

C = 3         C =1

H = 8         O=3

O = 2         H =1

3.   Start by balancing the carbon atoms. What would it take to have 3 Carbon atoms on the left? You would add a 3 in front of the carbon atoms on the left side to match the carbon atoms on the right.

4.   Now Try balancing the H atoms. You have 8 H atoms on the right and 1 H atom on the left. To balance these out you would need to add a 4 in front of the H atom which gives you 8 on both sides.

5.  Now balance out the oxygen atoms. Since we added coefficients to the compounds on the left we now have 10 oxygen on the left 4x1=4 + 3x2=6 now balance out the right side of the equation by adding a 5 in front of the O2 5x2 Oxygen gives you 10.

I hope this helps

Answer:

Helium is stable because it has 1 shell and the first shell can only have 2 electrons. Hydrogen is unstable because it has 1 shell but only 1 electron.

Answer:

(4) 266 moles

Explanation:

We have Dinitrogen Pentoxide N2O5

6.41*10^25 molecules are given

No of Moles of N2O5 = [tex]\frac{No of Molecules }{Avogadro's Number}[/tex]

                                     = [tex]\frac{6.41 * 10^25}{6.022*10^23}[/tex]

                                      = 106.5 mol

Now using Unitary Method

2 Mole of Nitrogen pentoxide require 5 mole of Oxygen to form N2O5

1 mole of N = [tex]\frac{5}{2}*O[/tex]

In 106.5 mole of N  = [tex]\frac{5}{2}*106.5[/tex] = 266.25 mole

So, 6.41*10^25 molecules of N2O5 will require 266.25 mole of Oxygen atoms.

Answer:

ur missing something`

Answer:

second

Explanation:

Answer:

Explanation:

Ksp (BaCO₃) = 5.1 x  10⁻⁹

Ksp (CaCO₃) = 4.8 x  10⁻⁹

Ksp (BaSO₄) = 1.1 x  10⁻¹⁰ = .11 x 10⁻⁹

Since solubility product of BaCO₃ is  greatest , its solubility is maximum .It is to be noted that all of them will be giving only two number of ions after dissolution in water .

BaCO₃ = Ba⁺ + CO₃⁻

Ksp = [ Ba⁺²] [ CO₃⁻² ]

= [ Ba⁺²]²

[ Ba⁺²] = √ Ksp

similarly we can find equations for others .

Answer:

Volume of HCl require =  6 mL

Explanation:

Given data:

Volume of HCl require = ?

Molarity of HCl solution = 1.60 M

Volume of NaOH = 48.0 mL

Molarity of NaOH = 0.200 M

Solution:

Formula:

M₁V₁     =      M₂V₂

By putting values,

1.60 M×V₁  =  0.200 M×48.0 mL

V₁  =  0.200 M×48.0 mL/1.60 M

V₁  =  9.6 M .mL /1.60 M

V₁  =  6 mL

Answer:

atomic number

Explanation:

hope this will help u(maybe)

A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. Elements fits into a group of elements with similar properties.

Explanation:

Protons are the positively charged particles in an atom

Neutrons do not carry any charges

Electrons carry negative charges

 Particles     Charge         Actual Mass       Relative mass compared to proton

 Electrons        -ve             9.11 x 10⁻³¹kg                        [tex]\frac{1}{1840}[/tex]

 Protons           +ve             1.67 x 10⁻²⁷kg                        1

 Neutrons            0              1.68 x 10⁻²⁷kg                       1

Answer:

C: The conjugate base of hydrofluoric acid is weaker than that of acetic acid.

Explanation:

I took the quiz and I put the answer that the other guy put and got it wrong but then it showed me the right answer which is C

Answer:

n California there are two plates - the Pacific Plate and the North American Plate. The Pacific Plate consists of most of the Pacific Ocean floor and the California Coast line. The North American Plate comprises most the North American Continent and parts of the Atlantic Ocean floor. The primary boundary between these two plates is the San Andreas Fault. The San Andreas Fault is more than 650 miles long and extends to depths of at least 10 miles. Many other smaller faults like the Hayward (Northern California) and the San Jacinto (Southern California) branch from and join the San Andreas Fault Zone.

The Pacific Plate grinds northwestward past the North American Plate at a rate of about two inches per year. Parts of the San Andreas Fault system adapt to this movement by constant "creep" resulting in many tiny shocks and a few moderate earth tremors. In other areas where creep is NOT constant, strain can build up for hundreds of years, producing great earthquakes when it finally releases.

Explanation:

Answer:

New volume V2 = 92.7 Liter (Approx)

Explanation:

Given:

V1 = 106 l

T1 = 45 + 273.15 = 318.15 K

P1 = 740 mm

T2 = 20 + 273.15 = 293.15 K

P2 = 780 mm

Find:

New volume V2

Computation:

P1V1 / T1 = P2V2 / T2

(740)(106) / (318.15) = (780)(V2) / (293.15)

New volume V2 = 92.7 Liter (Approx)

The final volume will be  44.69 L

Initial volume V₁ = 106.0 L

Initial pressure P₁ = 740.0 mm of Hg

Initial temperature T₁ = 45.0⁰C

Final pressure P₂ = 780.0 mm of Hg

Final temperature T₂ = 20.0⁰C

It is required to calculate the final volume V₂

The ideal gas equation is formulated as:

PV = nRT.

In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.

Applying the ideal gas equation considering the gas inside the balloon to be ideal, to get the new volume.

So, from ideal gas law, we get,

[tex]\frac{PV}{T} = constant[/tex]

where P = pressure, V= Volume, T= temperature.

So,

[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]

[tex]V_2 = \frac{P_1V_1T_2}{P_2T_1}[/tex]

On substituting the values;

[tex]V_2=\frac{106.0\times740.0\times20.0}{780.0\times45}[/tex]

V₂ = 44.69 L

Hence, The final volume will be  44.69 L

To learn more about ideal gas equation, click here:

https://brainly.com/question/4147359

Answer:

Explanation:

The pressure exerted by the gas can be found by using the formula

[tex]p = \frac{f}{a} \\ [/tex]

f is the force

a is the area

From the question we have

[tex]p = \frac{5610}{0.342} \\ 16403.508...[/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:A zone in a fluid where hot fluid rises while cold fluid sinks, resulting in a circulation of fluid.

Answer:

6

Explanation:

First, turn the mixed numbers into improper fractions.

4 2/3 = 14/3

1 2/7 = 9/7

Next, find the LCM of the denominators of the fractions.

3: 3, 6, 9, 12, 15, 18, 21

7: 7, 14, 21, 28, 35, 42

Then, we can see that 21 is the LCM of 7 and 3 so then we see how many times we had to multiply to get that number.

9/7 x 3/3 = 27/21

14/3 x 7/7 = 98/21

Last you just multiply straight across and simplify if needed.

27/21 x 98/21 = 6/1

6/1 = 6

mark brainliest if helped :D

Answer:

21st century

Explanation:

Answer:

If you have your square roots for memory, you know that the square root of 36 is equal to 6. Use a calculator to check your work. Take the square root of 36, as well as the square roots of the two integers surrounding 36, and make sure that the square root of 36 is between the square roots of the two integers.

Explanation:

Answer:

i think it is the 2nd one

Explanation:

Answer:

no..? how would we be the only person in the universe

Mass of sodium phosphate needed : 7.54 g

Reaction

3Pb(NO₃)₂ + 2Na₃PO₄ → Pb₃(PO₄)₂ + 6NaNO₃

mol Pb₃(PO₄)₂(MW=811.54272 g/mol)

[tex]\tt \dfrac{37.1}{811.54272}=0.046[/tex]

mol Na₃PO₄ = mol  Pb₃(PO₄)₂=0.046

mass Na₃PO₄(MW=163,94 g/mol) :

[tex]\tt 0.046\times 163.94=7.54124~g[/tex]

Answer:

For the most part, in mitosis, diploid cells are partitioned into two new diploid cells, while in meiosis, diploid cells are partitioned into four new haploid cells.The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred.

Explanation:

Answer:

electrolytes yes it is

Explanation:

i'm built different

Answer:

(1) The outermost shell should have Eight electrons to complete or called as  octet and attain stability.  

(2) Hydrogen and Chlorine share Electrons with each other and form Covalent bonding.

(3) Hydrogen forms an octet by obtaining an electron, and Helium is the only element that has an octet with two electrons.

(4) The octet rule states that an atom should attain eight electrons in the outermost shell to get stability, However we have exceptional like Hydrogen and helium.

(5) In Ionic bond there is a formation of Ions of the elements in a compound, like in NaCl there will be Na+ and Cl-.

(6) While in Covalent bond there is sharing of electron between the atoms included like O2.

(7) In ionic bond there is an electrostatic force of attraction while in Covalent bond the is a mutual sharing of electrons.  

9 physical

10 physical

11 physical

12 chemical

13 physical

14 chemical

15 physical

If it does not change the chemical makeup which is shown if it makes a change in color, temp, sound, or produces gas, its just a physical change.

Answer:

There would be no new island formations.

Explanation:

the plates simply dont move so nothing happens

when they do  mountains, volcanoes, trenches, exct. form

Answer:

There would be no new island formations.

Explanation:

Hope it helps!!

1. Box A

2. Box B

Explanation:

Box A has the greatest mass. As mass is directly proportional to Work. ie. Work= Force * Distance and Force= mass* acceleration. So,

Work = Mass* Acceleration * Distance

Box B reaches the end first as according to newtons second law, acceleration is inversely proportional to mass.Since, box B has the less mass, it will have higher acceleration and cover more distance.(Distance is directlyproportionalto speed)

Answer:

C

Explanation:

trust me got it right on e2020

Answer:

C. Different materials have different abilities to transfer energy.

Explanation: