Please help me with dis

Explanation:

The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side). We say that the water molecule is electrically polar.

Answer:

In the ring of fire

Hope this acc helps

Answer:

the second one

Explanation:

THE answers is b

Answer: it’s not A3X3

Explanation:

1. AX

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Answer:

2 in front of every one

Explanation:

HOPE IT HELPS

Answer:

They attract each other

Explanation:

A magnet has two poles;

North pole and south pole

When two opposite poles are placed close to each other, they attract each other. The short rule is opposite opes attract.

When two like poles are placed close to each other, they repel each other. The short rule is like poles repel.

Answer:

11.75 g H2O

Explanation:

3CaCO3 + 2H3PO4 --> Ca3(PO4)2 + 3H2O + 3CO2

MM H2O = 18.02 g/mol

MM CaCO3 = 100 g/mol

? g H2O = mass CaCO3 x (1 mol CaCO3/MM CaCO3) x (3 moles H2O/3 moles CaCO3) x (MM H2O / 1 mol H2O) = (65.2/100) x 18.02 = 11.75 g H2O

Answer: A. dipole

Explanation:

Dipole can be defined as the separation of the equal and opposite charges present in the molecule via ionic bonding. The water molecule comprising of two molecules of hydrogen being positively charged and one molecule of oxygen being negatively charged are connected via ionic bonding thus water molecule is an example of dipole molecule. There is unequal distribution of the electrical density throughout the molecule.

The polar molecule results in a dipole when equal but opposite charges are present in two regions.

Dipole:  

Dipole arises when a molecule have opposite and equal charge in the ends.

For example - water molecule

In water molecule Oxygen is negatively charged and hydrogen have low electronegativity, this difference in electronegativities arise dipole in molecule.

Therefore, the polar molecule results in a dipole when equal but opposite charges are present in two regions.

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Answer:

B

Explanation:

Ionic compound can conduct electricity

Answer:In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb

Explanation:

Just trust me

Answer:

A type of energy

Explanation:

Answer:

Wanning gibouss 56%

Explanation:

Answer:

The number following the name of the element is the number of subatomic particles inside the nucleus of the atom. This means that it is the mass number of the isotope. The average atomic mass of the element is the sum of the products of the percentage abundance and mass number of the naturally occurring isotopes.

Since, the average atomic mass of the hydrogen is nearest to 1 then, the most abundant isotope should be hydrogen-1.

Answer:

Should be A, but also I think there should be an arrow between O2 and 2H2O

Answer:

na2 co3

Explanation:

sodium carbonate formula

Answer:

your answer is C.

Explanation:

this is what it would be like

O

|

|

Na+ C Na+

/ \

/ \

O- O-

Answer:

milk and sugar and vinillia it uses a machine and you stir until it forms

Explanation:

Answer:

Because they want to clarify or give solution to the particle that the other didn't know

Explanation:

Correct me if im wrong thanks

Answer:

The correct answer would be

B. 2 Na atoms

Explanation:

As seen in the picture below,

Answer:

computer hardware is a collection of a physical part of a computer system

examples = CPU , monitor , mouse etc

Answer:

a.

[tex]K=\frac{[BaO]^2}{[Ba]^2[O_2]}[/tex]

b.

[tex]K=\frac{[MgO]^2}{[Mg]^2[O_2]}[/tex]

c.

[tex]K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}[/tex]

Explanation:

Hello!

In this case, since the equilibrium expression is set up by dividing the products over the reactants and powering to the stoichiometric coefficient, we can proceed as follows:

a. 2 Ba + O2 ⇌ 2 BaO.

[tex]K=\frac{[BaO]^2}{[Ba]^2[O_2]}[/tex]

b. 2 Mg + O2 ⇌ 2MgO

[tex]K=\frac{[MgO]^2}{[Mg]^2[O_2]}[/tex]

c. P4 + 5 O2 ⇌ P4O10

[tex]K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}[/tex]

Best regards.

Answer:

I dont know what the answer is

Explanation:

Answer:

I dont get this

Explanation:

the empirical chemical formula of X is CH4

Explanation:Step 1: Imagine you have a sample of compound weighing exactly . Multiply the mass of this sample by the mass percents to find the mass of each element in the sample

Step 2: Divide the mass of each element by the element's molar mass to find the moles of each element in the sample. Remember to round your answers to the correct number of significant digits.  

Step 3: Divide the moles of each element by the the smallest number of moles of any element to find the mole ratio of elements in the sample.  

Step 4: Multiply the mole ratio by the smallest whole number that changes it into a whole number ratio to find the atom ratio of elements in the sample.

Note that the result of each multiplication must equal a whole number only within measurement uncertainty.  

The measurement uncertainty in this calculation comes from the measurement uncertainty of the mass percents given in the question. The mass percents each have significant digits. That means each mass percent has some measurement uncertainty in the third significant digit, and only the first two significant digits can be considered completely reliable.  

In Step 1 you multiplied each mass percent by something with zero uncertainty (the exactly you assumed your sample weighed), in Step 2 you divided by a measurement with more than significant digits (the molar mass of the elements), and in Step 3 you divided by a measurement with the same number of significant digits (the least number of moles of any element in the compound). None of these steps added to the measurement uncertainty of your calculation.  

Therefore, the measurement uncertainty in the final result of all your calculations is determined by the measurement uncertainty in the original mass percents and will be in the third significant digit. That means the result of each of the final multiplication steps must equal a whole number only to within the first two significant digits.  

The whole numbers in the last column of the table are and .  

Answer:

0.0125mol

Explanation:

Molarity (M) = number of moles (n) ÷ volume (V)

n = Molarity × Volume

According to this question, a 0.05M solution contains 250 mL of NaOH. The volume in litres is as follows:

1000mL = 1L

250mL = 250/1000

= 0.250L

n = 0.05 × 0.250

n = 0.0125

The number of moles of NaOH is 0.0125mol.

Answer:

A fire proof

Explanation:

I hope this is help

Answer:

https://newshamchem.weebly.com/uploads/2/2/0/3/22035226/molarity_&_worksheet_answer.pdf

question 9.

Explanation:

Answer:

.0125 moles

Explanation:

Molarity = moles/volume

.05 M = moles/.250L

.0125 = moles

Answer: ummmmmm hmmmmm

Explanation:

Answer:

Just 1 i.e., Option B.

Because except for top of the molecule, all other sides are filled with a letter meaning there is one free space.

Answer:

B

Explanation:

H .  +  H .   ----->  H:H            {":" represents a covalent bond, that is, a shared pair of electrons}

A Lewis structure is a convention used to represent the covalent bonding in a molecule.   Dots or lines are used to represent

valence electrons (electrons available for bonding).  The Lewis structure for the hydrogen molecule is as follows.

     H:H  or  H-H

A bonding pair is an electron pair shared between two atoms.

A nonbonding pair (lone pair, unshared pair) is a pair of electrons that remains on one atom and is not shared.

Answer:

The answer is 2.

Explanation:

It is the only one that has a chemical change.

Hope this helped you :)

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