2. Which equation does not represent a neutralisation reaction?
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Explanation:

hope the picture above help u understand:)

The relative atomic mass (Ar) of this element is approximately 63.6 (to three significant figures).

To determine the relative atomic mass (Ar) of the element, we use the following formula:

Ar = (m₁ × % abundance1 + m₂ × % abundance2) / 100

Where:

m₁ and m₂ are the masses of the isotopes (peaks) in the mass spectrum,

% abundance1 and % abundance2 are the percentage abundances of the corresponding isotopes.

Given information:

Peak at m/z 63.0 with a percentage abundance of 69.1%.

Peak at m/z 65.0 having a percentage abundance of 30.9%.

Calculate the weighted average mass of the element's isotopes.

Ar = (63.0 × 69.1 + 65.0 × 30.9) / 100

Ar = (4347 + 2009.5) / 100

Ar = 6356.5 / 100

Ar ≈ 63.565

Noe, let's round the calculated mass to three significant figures.

Ar = 63.6

So, the relative atomic mass (Ar) of this element is approximately 63.6 (to three significant figures). This means that the average mass of the element's atoms is approximately 63.6 times the mass of one-twelfth of a carbon-12 atom, which is the standard reference for atomic masses.

To know more about relative atomic mass here

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Answer:

solutions are homogeneous mixtures of two or more solutes in a solvent

solubility is the ability of a solute to dissolve in a solvent

Explanation:

hope this is helpful

Answer:

Explanation:

what are the statments i can't help till i have the posable answers

Answer:

The second student is right.

Explanation:

The coyote feed on not only phalaropes but many other organisms present in the environment for its survival. There are many other organisms present in the ecosystem such as mice, squirrel, cactus fruit etc. The coyote feeds on phalaropes, the phalaropes feeds on brine shrimp and the brine shrimp feeds on algae for its survival so in this way the ecosystem moves in the forward direction. The coyote feeds on phalaropes so the energy that is present in phalaropes transferred into coyote which only 10 % while the remaining is released in the atmosphere in the form of heat energy.

Answer:

For a good consert mix aggregate needed to the clean hard strong partical free of absorb chemicals or coating clay and other fine materials

Answer:

B.

Explanation:

The electron dot diagram which is also known as the Lewis electron dot diagram is a diagram that shows an atom's valence electrons by placing dots, which represent the valence electrons of the element, around the elements symbol

The element for which the electron dot diagram is found = Neon, Ne

The atomic number of neon, Ne = 10

The electronic configuration of neon = 1s²2s²2p⁶

The valence shell is the outermost shell having   the highest value of the coefficient of the orbitals, n = 2s²2p⁶

The number valence electrons in neon = The number of electrons in the valency shell = 2 electrons + 6 electrons = 8 electrons

The number of valence electrons in neon = 8

Therefore, the electron dot diagram for neon will have 8 dots located around the Ne symbol, which gives option B

Answer:

It is the amount of energy needed to move an electric charge across a cell

Explanation:

Answer:

B

Explanation:

production ca3(PO4)2

4x2=8

Answer:

copper

Explanation:

so for this you can work out the mass for both and compare

so mass = moles × mr

so mass of sodium = 1 × 23= 23 g

and mass of copper = 1 × 63.5= 63.5 g

so copper have more mass :)

Answer:

True po

Explaination :

I hope it helps

Vapourization and condensation. the actual 1 shud be vapourization.

Answer: The number of moles of NaOH is 0.0036 moles

Explanation:

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

[tex]\text{Molarity of solution}=\frac{\text{Moles of solute}\times 1000}{ \text{Volume of solution (mL)}}[/tex] .....(1)

Given values:

Molarity of NaOH = [tex]0.1mol/dm^3=0.1mol/L[/tex]         (Conversion factor: [tex]1L=1dm^3[/tex]

Volume of the solution = [tex]36cm^3=36 mL[/tex]             (Conversion factor: [tex]1mL=1cm^3[/tex]

Putting values in equation 1, we get:

[tex]0.1=\frac{\text{Moles of NaOH}\times 1000}{36}\\\\\text{Moles of NaOH}=\frac{0.1\times 36}{1000}=0.0036mol[/tex]

Hence, the number of moles of NaOH is 0.0036 moles

D. 8

Hope this helps! :)

______________

Answer:

D: 8 neutrons would make it most stable

Answer:

C. natural gas

Explanation:

Solar comes from the sun, which if it became nonrenewable, we would be dead. hydroelectric comes from water and Dams, which water is reproduced through rain. Biomass are things like leaves, which are seasonally reproduced.

Answer:

C

Explanation:

Electromagnetic waves travel at the speed of light and do not require molecules (gas, solid or liquid) to vibrate and travel.

Soundwaves when singing or from thunder vibrate particles to reach our ears and are known as mechanical waves.

Answer:

4.000   hope this helps :)

Answer: The volume of the solution is 85.7 mL

Explanation:

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

[tex]\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (mL)}}[/tex] .....(1)

We are given:

Molarity of solution = 0.600 M

Given mass of [tex]BaSO_4[/tex] = 12.00 g

We know, molar mass of [tex]BaSO_4=[(1\times 137.33)+(1\times 32.07)+(4\times 16)]=233.4g/mol[/tex]

Putting values in equation 1, we get:

[tex]0.600=\frac{12.00\times 1000}{233.4\times \text{Volume of solution}}\\\\\text{Volume of solution}=\frac{12.00\times 1000}{233.4\times 0.600}=85.68mL=85.7mL[/tex]

The rule of significant number that is applied for the problems having multiplication and division:

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Here, the least number of significant figures is 3 that is determined by the number, 0.600. Thus, the answer must have these many significant figures only.

Hence, the volume of the solution is 85.7 mL

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Mg(OH)2, or 58.31968 grams.

Answer:

B. all organisms are made of at least one cell.

C.cells are the building blocks of life.

D.all cells come from preexisting cells

Explanation:

According to the cell theory that was proposed via the contribution of three scientists in 1830's namely: Matthias Schleiden, Theodor Schwann, and Rudolf Virchow, the following was stated:

- Cells are the basic and fundamental unit of life

- Living organisms are made up of one or more cells

- All cells arise from pre-existing cells.

From the above components, the following are said to be true and correlate with the universal cell theory:

B. all organisms are made of at least one cell.

C.cells are the building blocks of life.

D.all cells come from preexisting cells

Answer:

which elements??? more info please

Answer:

Aldehyde

Explanation:

1-bromo-1-1diphenylpropane

Answer:

H2 + CaCl2 -> 2HCl + Ca

How many grams of HCl are made when 2.93 g of

Ca are made?

Explanation:

From the given balanced chemical equation, it is clear that:

2mol. of HCl and 1mol. of Ca are produced.

2mol. of HCl weighs --- 73.0g

1mol. of Ca weighs --- 40.0g

Hence,

73.0g of HCl and 40.0g of Ca are produced.

When 2.93g of Ca is produced then, how many grams of HCl will be produced?

[tex]=> 2.93g Ca * \frac{73.0g HCl}{40.0g Ca} \\=5.35g HCl[/tex]

Hence, 5.35g of HCl is formed.

Answer:

C.because protons and electrons are equal they will be 38 so neutron will be 50

(i) Liang - liang stoma lebih banyak di bahagian bawah daun berbanding di bahagian atas permukaan daun.

(ii) Struktur X berfungsi mangawal pembukaan dan penutupan liang stoma

Answer:

increase in the size of fruits and vegetables

Answer:

increased size of fruits or vegetables

Explanation:

Explanation:

Dinitrogen monoxide: covalent bond

copper(||) hydroxide: ionic bond

Butane: Covalent Bond

Answer

Disulfur decafluoride S2F10 covalent

calcium sulfide  CaSO3 ionic

Diphosphorus tetraiodide P2I4 ionic

dinitrogen monoxide  N2O   ionic

Aluminum chloride  AlCl3  covalent

copper(II) hydroxide  Cu(OH)2  ionic

barium sulfate BaSO4  covalent

butane  C4H10  covalent

Explanation:

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