help me please!!!!!!!!!​

The number of molecules : N = 1.505 x 10²³

Given

0.25 mol N₂O₄

Required

The number of molecules

Solution

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

N = 0.25 x 6.02.10²³

N = 1.505 x 10²³

Explanation:

The current study presents a method for automating the Koppen–Garcia climate classification using a GIS module. This method was then applied in a case study of the Lerma-Chapala-Santiago watershed to compare time series data on climate from 1960 to 1989, 1981 to 2010, and 1960 to 2010. The kappa statistic indicated that the climate classifications of the generated model had a perfect degree of agreement with those of a prior nonautomated study. The climate data from the period 1960 to 2010 were used to create a climate map for the watershed. Overall, the dominant climates were dry, semiarid, temperate, and semiwarm temperate with a summer rainfall pattern. A comparative analysis of climate behavior between 1960 and 1989 and between 1981 and 2010 showed changes in temperature and extreme temperatures over 13.6% and 9.9%, respectively, of the watershed; the presence or absence of mid-summer drought also changed over 0.8% of the watershed. The module developed herein can be used to classify climates across all of Mexico, and data of varying spatial resolution and coverage can be inputted to the module. Finally, this module can be used to automate the creation of climate maps or to update climate maps at diverse spatial-temporal scales.

Answer:

4 atoms of oxygen.

Explanation:

The given equation is :

[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

Here Fe and O₂ are reactants and Fe₂O₃ is a product. It is a balanced chemical reaction in which the number of atoms on LHS are equal to number of atoms on RHS.

4 atoms of iron react with 3 atoms of oxygen to form iron oxide. Hence, there are 4 atoms of reactants in this equation.

The percent error of Denzel's measurement : 5.75%

Given

32.75 g measurement

Required

The percent error

Solution

% Error : difference between the theoretical value and the actual value

% Error for Denzel measurement :

1. Subtract the measurement value with the accepted value

= 32.75 g - 30.97 g

= 1.78 g

2. Divide by the accepted value, and multiply by 100

= (1.78/30.97) x 100%

= 5.75%

Answer:

25n

Explanation:

Answer:

b cation

Explanation:

that plus means it is positively charged. ions that are positively charged are cations. negatively charged ions are called anions

Answer: Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light.

Explanation: In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.

Answer:

B

Explanation:

why because think about it 0.5 is more closer to 1.0

Answer:

chlorine is more reactive than iodine

Explanation:

because as you go down a group the

non- metallic character get reduced .

Answer:

is this a worksheet or something

Explanation:

Answer:

Physical state

Explanation:

It's (3) physical state, I don't know why but I had it in a question and it said the answer is physical state

Answer:

I haven't learn this yet but you can maybe ask desmos that app is helpful maybe it can help with your question.

Answer:

See answer below

Explanation:

As you are asking for chemical formula and ionic equation, then, I will assume that after the station #4 below, are the solutions you are requiring.

You are also not specifing if you want for example, result of solution 1 + solution 3. If you need that, please post that on another question.

Now for the chemical formula, you need to identify the elements in all 3 solutions, and also the type of compound.

1. Solution 2 Potassium Chloride:

In this case we have Potassium on one side, and Chlorine on the other side, the symbol for those are K and Cl. As Potassium have the +1 oxidation state, cause is the only one that it can have, when it's next to an halide like chlorine or bromine, it will form a binary salt. The halides, usually work with the lowest oxydation state. In the case of Chlorine it will be -1, so, the formula will be:

KCl

And the net ionic equation will be the chemical equation that shows how the charges and atoms are balanced. In this case it would be:

K⁺ + Cl⁻ ------> KCl

2. Solution 1 Copper(II) sulfate:

In this case we have a tertiary salt, The copper's symbol is Cu, and is working with it oxydation state +2. Sulfate is an anion and it's formula is SO₄ and works with oxydation state -2 instead.

The chemical formula and ionic equation will be:  

Copper(II) sulfate: CuSO₄

And the net equation:

Copper sulfate: Cu²⁺ + SO₄²⁻ -------> CuSO₄

3. Solution 3 Sodium hydroxide:

In this case, we have a compound that it's usually used in acid base reactions. This is a strong base or hydroxide, and we have the element of Sodium (Na) with the oxydation state +1, is the only one it can have, and for the other side we have the oxydrile anion OH, and together is working with the oxydation state -1. So the chemical formula will be:

NaOH

And the net ionic equation:

Na⁺ + OH⁻ -------> NaOH

Hope this helps

Answer:

20

Explanation:

The acceleration in this problem is 20

Acceleration is defined as the rate of change of velocity with time. When a force is exerted on a body and the net force is greater than zero, it begins to accelerate.

Answer:

4 phosphorus

Explanation:

The given compound is:

             2Ca₃(PO₄)₂

We have been given 2 moles of Ca₃(PO₄)₂ . The number of atoms is the same as the number of elements present within the compound. Since this is 2 moles, we multiply every number of atoms by 2;

      2Ca₃(PO₄)₂

Ca :  2 x 3  = 6 atoms

P :  2 x 2  = 4 atoms

O:  2 x (2 x 4) = 16 atoms

So we have 4 phosphorus atoms

Answer:

Mass = 176 g

Explanation:

Given data:

Volume of CH₄ = 89.6 L

Mass of CO₂ formed = ?

Solution:

Chemical equation:

CH₄ + 2O₂    →       CO₂ + 2H₂O

one mole of any gas at STP occupy 22.4 L volume.

number of moles of CH₄  that occupy 89.6 L = 89.6/22.4 = 4 mol

Now we will compare the moles of CH₄ and CO₂:

                CH₄            :          CO₂

                  1               :            1

                  4              :             4

Mass of CO₂:

Mass = number of moles × molar mass

Mass = 4 mol × 44 g/mol

Mass = 176 g

Answer: Rutherford

Explanation:

Answer:

it is 1. 4 in stomach it is consentrated

Explanation:

1.5 to 3.5

Parietal cells contain an extensive secretory network (called canaliculi) from which the hydrochloric acid is secreted into the lumen of the stomach. The pH of gastric acid is 1.5 to 3.5 in the human stomach lumen, a level maintained by the proton pump H+/K+ ATPase.

Answer:Is sugar water a mixture or a compound? Define mixtures and compounds, and explain how without tasting it, Nicole can test to make sure she is using the sugar water in the glaze. The sugar-water is a mixture because it is chemically bonded, not chemically combined. A mixture is something that has 2 substances or more. hope this helps

Explanation:

Answer:

Team 2

Explanation:

Team 1 pulls with a frce of 150N

Team 2 pulls with a force of 200N

In a tug-of-war, the goal is to pull the other team over a certain distance and this is determined by the force applied.

If the two team pulls with equal force, there wold be no net force and the teams stays in the same position.

In this case however, team 2 pulls with a force greater than team 1. There is a net force of 50N in favor of Team 2. This means team 2's force would neutralize that of team 1 and the excess force would be use in pulling Team 1

The chemical formula for this compound : Cu₂SO₄-Copper(I) sulfate

Given

2 atoms of Copper, 1 atom of Sulfur and 4 atoms of Oxygen.

Required

The chemical formula

Solution

The number of atoms forming a compound is usually indicated from the subscript in the formula

From the problem it can be seen that the compound has:

2 atoms of Cu, 1 atom of S, and 4 atoms of O

So the formula:

Cu₂SO₄

Answer:

Mass of object = 1 kg

Explanation:

Given:

Acceleration = 10 m/s²

Force applied = 10 N

Find:

Mass of object

Computation:

Mass = Force / Acceleration

Mass of object = 10 / 10

Mass of object = 1 kg

Answer:

The claim is: Therefore Mitosis requires less energy than sexual reproduction does.

Explanation:

Explanation:

4Fe + 3O2 --> 2Fe2O3

Mass of  iron = 35g

How many moles of iron react?

The relationship between mass and moles is given as;

Moles = mass /  Molar mass

Molar mass of iron = 56g/mol

Number of moles = 35 / 56 = 0.625 mol

How many moles of oxygen molecules must react?

From the equation of the reaction;

4 mol of Fe reacts with 3 mol of Oxygen molecule

0.625 mol would react with x mol?

4 = 3

0.625 = x

x = 0.625 * 3 / 4 = 0.46875 mol

How many moles of product form?

From the equation of the reaction;

4 mol of Fe reacts to form 2 mol of Fe2O3

0.625 mol would form x mol of Fe2O3

4 = 2

0.625 = x

x = 0.625 * 2 / 4 = 0.3125 mol

What mass of product forms?

Moles = mass /  Molar mass

Mass = Molar mass * Moles = 159.69 g/mol * 0.3125 mol = 49.9g

Answer:

That is NOT true!

Explanation:

No matter how little or big amount of waste you add, it is still pollution, and it adds to the big amount that is already there.

Answer:

30

Explanation:

The atomic number of Zinc​ is 30.

Hope this helped!

Have a supercalifragilisticexpialidocious day!

Answer:

atomic number of zinc is 30

Explanation:

Mark brainless plz