I just need to know which ones are insulators and the others conductors

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

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:

ur missing something`

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:

21st century

Explanation:

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.  

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:

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:

a

Explanation:

a convection currents

Answer:

Isotopes

Explanation:

Scientists now know that most elements come in more than one version. The different versions are called Isotopes. The difference between them is the number of neutrons in the nucleus.

Isotopes usually differ in the mass number of the elements which is the reason why they also have a different neutron number. They may also differ in physical characteristics but would most likely have common chemical properties.

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:

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!!

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: 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:

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

Answer:

electrolytes yes it is

Explanation:

i'm built different

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.

Answer:

i think it is the 2nd one

Explanation:

Answer:

second

Explanation:

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:

uranium nucleus

Explanation:

The charge on protons is positive. Hence repulsion is to be expected between the like charges.

The magnitude of repulsion between protons increases with the number of protons present in the nucleus.

Uranium possess 92 protons while barium possess only 56 protons. Hence uranium having a larger number of protons will experience a larger repulsion in its nucleus compared to barium.

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:

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:

C

Explanation:

trust me got it right on e2020

Answer:

C. Different materials have different abilities to transfer energy.

Explanation:

Answer:

Region one because an area that has contour lines close together means that the area is steep. but in region ones case it has no contour lines meaning the area is flat.

Answer:

A. 1

Explanation:

Answer:

c

Explanation:

c first quarter waxing half moon

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.

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Answer:

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