Find the percent nitrogen in ammonium oxide.(Answer = 53.8%)

Explanation 2Al2O3(s)-->4Al(s)+302(g)What is the total number of moles of O2 that are produced when 8.0 mol of Al2O3(s)are totally decomposed ? 

Yes, it is critical for your tap water to be a good buffer as it is for the water at the nearest lake to be a good buffer.

This is because the tap water is the water coming from the nearest lake so it should also be a good buffer just like the nearest lake so we can conclude that it is critical for your tap water to be a good buffer as it is for the water at the nearest lake to be a good buffer.

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Answer:

0.2553669915026199 BaSO4

Explanation:

hi, give brainliest?

Answer:

mg

Explanation:

there are 2.05 moles mg and 2.05 moles hcl

MM Mg = 24 g/mol

MM HCl = 36.5 g/mol

mol Mg = 50 : 24 = 2.083

mol HCl = 75 : 36.5 = 2.055

moles of reaction: divide the moles of each reactant by its corresponding coefficient in the balanced equation.

Mg : HCl = 2.083/1 : 2.055/2 = 2.083 : 1.028

HCl is the limiting reactant because it gives the fewest moles of reaction.

Answer:

As Per Given Information

Number of moles SO₂ ( Sulphur dioxide ) is 0.30

We 've been asked to find the number of atoms in given moles of Sulphur dioxide .

Value of Avogadro Number is 6.022 × 10²³ mol⁻¹

For finding the number of atoms we will use formale

[tex]\underline{\boxed{\textbf{\textsf{ Number \: of \: atoms \: = Given \: moles \: . Avogadro \: number}}}}[/tex]

Putting the given value we obtain

[tex] \sf \twoheadrightarrow \: Number \: of \: atoms \: = 0.30 \times 6.022 \times {10}^{ 23} \\ \\ \sf \twoheadrightarrow \: Number \: of \: atoms \: = \: 1.8066 \times {10}^{ 23} atoms[/tex]

So, the number of atoms in sulphur dioxide is 1.8066 × 10²³

No of atoms

Answer:

3

Explanation:

Important concept! The little number after an element represents the number of atoms in the substance. Eg. SF6. The 6 after the F tell us that there are 6 atoms of Fluorine in SF6. The coefficient or big number before a substance tells us how many of that substance there is in the equation. TO find the number of atoms in a substance with a coefficient we simply multiply the coefficient by the subscript or small number. Eg. 4SF6. The number of fluorine atoms in 4SF6 can be found my multiplying 4 and 6. 4 * 6 = 24 so there are 24 atoms of fluorine in 4SF6

Balancing the equation!

First lets list the number of atoms of each element on each side so we can see what we need to balance

SF6 + SO3 --> O2SF2

               2  S   1

               6  F  2

               3  O  2

First lets balance the number of oxygen atoms. We can do this by adding a coefficient of 2 to SO3 and a 3 to O2SF2. After doing so lets count the number of atoms of each element again as some of them may have changed.

SF6 + 2SO3 --> 3O2SF2

                3  S   3

                6  F  6

                6  O  6                

It appears that the each element in the reaction is now balanced after adding a 2 to SO3 and a 3 to O2SF2 so the equation is now balanced.

The answer would be 3 as 3 was added to O2SF2 to balance the reaction.

The molarity of the solution is equal to 0.500M.

To calculate the molarity of a solution, one must use the value of the amount of moles and the volume, so that:

                                                 [tex]M = \frac{mol}{v}[/tex]

So, applying the values ​​given in the question we have:

                                         [tex]M = \frac{1mol}{2L}[/tex]

                                       [tex]M = 0.5mol/L[/tex]

So, the molarity of the solution is equal to 0.500M.

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Look at the reaction

More than 1mol of HC2H3O2 is required so the mols will be doubled atleast

Now

NaHCO_3 is less

In the given query, the limiting reagent in provided chemical reaction is: [tex]\rm NaHCO_3(s) + HC_2H_3O_2(aq) \rightarrow C_2H_3O_2Na(aq) +H_2CO_3(aq)+ H_2O(l) +CO_2(g)[/tex] is [tex]\rm HC_2H_3O_2[/tex].

In a reaction, limiting reagent is a chemical substance that is completed used or is totally consumed resulting into limiting the formation of further products.

In the provided reaction:

[tex]\rm NaHCO_3(s) + HC_2H_3O_2(aq) \rightarrow C_2H_3O_2Na(aq) +H_2CO_3(aq)+ H_2O(l) +CO_2(g)[/tex]

Given: 0.00516 mol [tex]\rm HC_2H_3O_2[/tex] and 0.00585 mol [tex]\rm NaHCO_3[/tex].

Using balanced equation, the stoichiometric ratio of  [tex]\rm HC_2H_3O_2[/tex] to  [tex]\rm NaHCO_3[/tex] is 1:1. Meaning that, for every 1 mole of  [tex]\rm HC_2H_3O_2[/tex], we need 1 mole of  [tex]\rm NaHCO_3[/tex].

Therefore, the number of moles of  [tex]\rm NaHCO_3[/tex] needed to react with 0.00516 mol of  [tex]\rm HC_2H_3O_2[/tex] is:

0.00516 mol  [tex]\rm HC_2H_3O_2[/tex] × (1 mol  [tex]\rm NaHCO_3[/tex]/ 1 mol  [tex]\rm HC_2H_3O_2[/tex])

= 0.00516 mol [tex]\rm NaHCO_3[/tex].

Since we have 0.00585 mol of [tex]\rm NaHCO_3[/tex], which is greater than the amount needed (0.00516 mol), [tex]\rm NaHCO_3[/tex] is not the limiting reactant.

Calculate the number of moles of [tex]\rm HC_2H_3O_2[/tex]needed to react with 0.00585 mol of [tex]\rm NaHCO_3[/tex]:

0.00585 mol [tex]\rm NaHCO_3[/tex] × (1 mol [tex]\rm HC_2H_3O_2[/tex]/ 1 mol  [tex]\rm NaHCO_3[/tex]) = 0.00585 mol  [tex]\rm HC_2H_3O_2[/tex]

As we see, only 0.00516 mol of  [tex]\rm HC_2H_3O_2[/tex] are present, which is less than the amount needed (0.00585 mol),  [tex]\rm HC_2H_3O_2[/tex] is the limiting reactant.

Therefore,  [tex]\rm HC_2H_3O_2[/tex]is the limiting reactant in the provided chemical reaction.

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Answer:

get it back to me by tomorrow

Explanation:

I am currently in life generally but will be perfect

Answer:

yes

Explanation: Our DNA determines how many muscle fibers a person is born with. This number never changes cause one can't make more muscle fibers during their lifetime. With more muscle fibers, one has the potential to be stronger.

It is an acquired trait because you could train your muscles to become bigger. When you train, for example resistance training, your muscle produces more myofilaments which increases their diameter. This is why you develop large muscles when you train.

Answer:

More information so I can answer please.

Explanation:

Answer: improvements in nutrition

Explanation:

Answer:Look at the graph above. Human population increased dramatically at certain times. The graph begins 10,000 BC, although you can't really see the line. Population starts to rise perceptibly at around 1800 BC. The numbers begin to rise dramatically about 200 years ago. What causes these changes

Explanation:

Answer:

A.

Explanation:

because it is the only logical answer

Answer:

i think the answer is 12.0

For a 300.0g sample of glass at 76.0C  placed in a large calorimeter containing 1000.0g of water,  the specific heat of the glass and the percent error in this value are mathematically given as

C= 0.211 cal / g

% E = 5.5%

Generally, the equation for the  balanced heat on glass is mathematically given as

Mg* SH of glass *dT of glass = Mwater * SH of water * dT of water

Therefore

300 * C * (76 - 27) = 1000 * 1 * (27 - 23.9)

C = 1000 * 3.1 / (300 * 49)

C= 0.211 cal / g

In conclusion,The precent error is

% E = (0.211 - 0.2) * 100 / 0.2

% E = 5.5%

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Answer:

See below

Explanation:

Most of the elements found on earth are metals. A look at the periodic table shows that these elements occupy the entire left-hand stretch of the table, from the main group, through the transition metals, lanthanides, actinides, alkali and alkaline earth elements. One element included here, hydrogen, is rarely classified as a metal. On earth, hydrogen is a gas, and it is usually classified as a non-metal, like oxygen and nitrogen. However, at very low temperatures and very high pressures, hydrogen is a solid, and under the right conditions it is expected to behave more like a metal. It is thought that gas giants, such as Jupiter and Saturn in our solar system, may have metallic hydrogen cores. Metallic elements are not generally found as single atoms. Instead, the atoms in an element such as iron cluster together to make a larger structure. The materials formed in this way have some similar properties. Metals are shiny. Metals are malleable; they can be bent and formed into different shapes (at least when heated). Metals are good conductors of electricity. In metals, large groups of atoms cluster together. Metal atoms form large, extended arrays, with the atoms repeating in specific patterns throughout the solid.

The properties of metals are really important. The fact that metals are malleable allows them to be formed into sheets that can be used to make cars, airplanes, railway lines, cargo containers and ships, as well as more delicate items such as jewelry and surgical tools. A related property, ductility, allows metals to be stretched into long, thin wires. Together with the conductivity of metals, this property allows transmission lines to carry electricity from generating stations to people like you. Sometimes, the source of electricity is hundreds of miles away; electricity used to power a laptop in New York may come from places like La Grande Baleine or James Bay, in northwestern Quebec. Some of these properties can be understood by thinking about the structure of metallic elements. A great deal of our structural understanding of metals and other materials comes from x-ray diffraction studies. A very focused beam of x-rays can be sent into a material, where they will bounce off the atoms and scatter in different directions. The outcome sounds chaotic, but if the solid is highly organized, the x-rays behave in very predictable ways. The result is an x-ray diffraction pattern. A diffraction pattern is a little like the pattern of ripples on a pond when a stone is thrown into calm water. The pattern can be studied and decoded mathematically to find the locations of the atoms within the material. X-ray diffraction can reveal the atomic-level structures of highly ordered materials such as metals. What does x-ray diffraction tell us? Evidently, a chunk of metal is not just a mass of atoms stuck together randomly. Instead, the atoms arrange themselves in neat layers in very specific ways. These layers of atoms sit on top of each other to form a three-dimensional solid. One of the properties that results from this organized arrangement of atoms is the malleability of metals. If you take a nice, soft metal such as copper, after annealing it in a fire or oven, it can be bent and shaped easily. With copper, this can be done even after the metal has cooled to room temperature. When you bend the copper, you are actually causing layers of atoms to slide over each other, until you stop bending and they come to rest in a new location. If you have ever done this, you'll know that the more you work with the copper, the harder it is to bend. That's because while you are sliding layers of atoms back and forth, occasionally an atom (or an entire row of atoms) slips out of place. It is no longer part of a smooth layer, and so other atoms can't slide past it as easily. This situation is called a defect. Once there are enough defects in the metal, it is impossible to bend the material anymore. Metal atoms are found in organized layers. Because these layers can roll over each other, metals can be worked into different shapes.

Answer:

Rock

Explanation:

There is a carbon cycle that scientists have studied that shows how carbon is reused in an ecosystem so carbon is not the answer.

There is a hydrogen cycle that scientists have studied that shows how hydrogen is exchanged between biotic and abiotic sources.

There is no rock cycle

There is a water cycle that has been studied by scientists that shows the movement of water within the earth and the atmosphere

The answer is Rock

Answer:

11 grams of hydrogen and 89 grams of oxygen

Explanation:

Based on the bond length, the molecular weight of the unknown metal X is 23.

Ionic compounds are compounds which are formed between oppositely charged ions.

When hydrogen combines with the group 1 metals, they form ionic compounds.

The group one metals that combine with hydrogen to firm ionic bonds include:

The molecular weight of lithium is 7 g

The molecularweight of sodium is 23

The molecular weight of Potassium is 39.

Therefore, based on the equilibrium bond length, the molecular weight of the unknown metal X is 23.

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Answer:

The answer is ligament

Explanation:

Hope that helps!

heat water 1 = heat water 2

mass of water = density x volume

because density = 1 g/ml then:

mass water 1 = 100 g

mass water 2= 390 g

Input the equation:

mcΔt 1 = mcΔt 2

100 . c . (95 - T) = 390 . c . (T - 25)

9500 - 100T = 390T - 9750

9500+9750 = 390T+100T

19250=490T

T=39.29 °C

Answer:

A,C,D

Explanation:

I TOOK THE TEST

It means to not favor either side of an argument, even if you believe one side may be right.

Answer:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings.”

Explanation:

hope this helps

i did this for hw

Answer:

I guess D ...,...,.....