n the chemical reaction, there are 8 elements (Z Y X W V U T S). in the first reaction two pairing were made Z bonds to T and V bonds to X. In the third reaction V bonds to S. the reaction only consists of three negatively charged elements. which of the following statement is false?
A. Y must be positively charged
B. V must be positively charged
C. W must be positively charged
D. T, X , & S could possibly be negatively charged
E. T, X and S could possible be positively charged

a. In a campfire, wood is the limiting reactant and oxygen is the excess reactant

b. In the formation of tarnish (silver sulfide) on a silver-plated teapot, airborne sulfur is the limiting reactant, and silver is the excess reactant.

c. In the decomposition of baking powder in batter to produce carbon dioxide, the limiting reactant is the baking powder, while the excess reactant could be any other ingredient in the batter.

In each of these reactions, the limiting reactant is the substance that determines the amount of products formed, while the excess reactant is the one that remains unreacted after the reaction is complete.
a. Wood is composed mainly of cellulose and lignin, which react with oxygen in the air to produce carbon dioxide, water, and heat. The amount of wood determines the extent of the reaction, while there is usually an abundance of oxygen in the atmosphere to sustain the fire.
b. Sulfur in the atmosphere, often from pollution, reacts with silver to form silver sulfide. Since sulfur is present in relatively small quantities, it determines the amount of tarnish formed. The silver in the plating remains in excess.
c. Baking powder contains sodium bicarbonate, which decomposes upon heating to produce carbon dioxide, water, and a byproduct. The amount of carbon dioxide released depends on the amount of baking powder used, while other ingredients in the batter are in excess and do not affect the reaction.

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Answer:

4 4 8 4 is the balanced equation

Answer:

because yes

Explanation:

Answer:

When heated, glass can become a sort of liquid I guess :>

Explanation:

Answer:

A. 7

(assuming the water is neutral)

The atoms inside the reactants reorganise their chemical bonds during a chemical reaction to create products. There will therefore always be a shift in energy when chemical reactions take place.

The atoms inside the reactants rearrange and link differently throughout a chemical reaction to create one or more innovative brands with properties distinct from the reactants. A chemical change occurs when a new material is created.

Exothermic refers to chemical reactions which release energy. When bonds are created in the products of exothermic processes, more energy is produced than is required to rupture the connections between the reactants. Endothermic refers to chemical reactions that either use or absorb energy.

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Answer:

b

Explanation:

The statement that is true about what can occur in a chemical change is b. Elements may combine to form compounds.

A chemical change can be described as the change which do take place when the substance's composition is been altered which could bring about the formation of another substance.

It should be noted that in the chimical change there is uaually a formation of a new product after one or more substance must have reacted together which implies that in this kind of change there is usuall a new substance that will be formed in the process.

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Mass percent is given by:

We will firstly use the desnity to calculate the mass of the solution:

Now that we have the mass of the solution we are able to calculate the mass percent:

Answer: Mass percent is 10.6%

Answer:

\(CH_{4} O_{2}\)

Explanation:

The empirical formula is the simplest whole-number ratio of the elements in a compound to one another. To find the empirical formula given a molecular formula, divide all the subscripts by their greatest common factor.

3, 12, and 6 can all be divided by 3, which makes the empirical formula \(CH_{4} O_{2}\)

Answer:

The current used by the 750-W microwave is 0.75 times the current used by the 1,000-W microwave

Explanation:

The given parameters are;

The electrical power of one of the microwaves, P₁ = 750 W

The electrical power of the other microwave , P₂ = 1,000 W

The applied voltage of the circuit = 120-V

Electric power, P = I·V

Where;

I = The amount of current used

V = The applied voltage = 120 V

Therefore, for the first microwave, we have;

P₁ = I₁ × V

∴ I₁ = P₁/V = 750 W/(120-V) = 25/4 amperes = 6.25 amperes

The amount of current used by the 750-W microwave, I₁ = 6.25 amperes

For the second microwave, we have;

P₂ = I₂ × V

∴ I₂ = P₂/V = 1,000 W/(120-V) = 25/3 amperes = 8.\(\overline 3\) amperes

The amount of current used by the 1,000-W microwave, I₂ = 8.\(\overline 3\) amperes.

The ratio of the two currents, is I₂/I = (25/3 amperes)/(25/4 amperes) = 4/3

Therefore, I₂ = 4/3 × I₁, from which we have;

I₁ = 3/4·I₂

The current used by the 750-W microwave is 3/4 the current used by the 1,000-W microwave.

The false statement is (2) Group 3A metals are more reactive than Group 2A metals which are more reactive than Group 1A metals.

This statement is incorrect as the reactivity of the groups decreases as we move from Group 1A to Group 3A. Group 1A metals are the most reactive of the three groups, followed by Group 2A metals and then Group 3A metals. This trend can be explained by the increasing ionization energy and electronegativity from left to right across the periodic table.

Group 1A and 2A metals are indeed strong reducing agents. They readily give up their valence electrons to form cations and have a strong tendency to form ionic compounds with nonmetals. The oxides of Group 1A and 2A metals are basic in nature, as they react with water to form metal hydroxides. However, BeO is an exception to this trend as it is amphoteric in nature and can react with both acids and bases.

Hydroxides of most Group 2A metals are indeed less soluble than hydroxides of Group 1A metals due to the differences in the ionic/covalent character of the hydroxides. The hydroxides of Group 1A metals have more ionic character, while the hydroxides of Group 2A metals have more covalent character, which makes them less soluble in water.

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It is not necessary for the student to measure the amount of deionized water that goes into the flask to prepare the solution because the volume of deionized water added to the flask will be exactly equal to the volume of the solid that was transferred to the flask.

When the student adds a carefully weighed amount of solid to the flask, the total volume of the solution will be the volume of the solid plus the volume of the deionized water that is added to dissolve the solid. The student can accurately measure the volume of the solid because it is weighed, so she knows the exact amount of material that was added to the flask.

On the other hand, the volume of deionized water that is added to dissolve the solid can be calculated based on the volume of the solid and the desired concentration of the solution. For example, if the student knows that the solid weighed 5 g and the desired concentration of the solution is 0.1 M, she can calculate the volume of deionized water needed to prepare the solution as follows:

Volume of deionized water = (0.1 M × V) / (Molar mass of the solid)

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Answer:

Renewable Resources : Trees, Wind Energy, Water, Wheat, Sun Energy, Air, Geothermal Energy, Biomass energy, Wood,  Animals.

Non-Renewable Resources : Coal, Oil, Petroleum, Natural Gas.

Not 100% sure which Nuclear Energy is.

Explanation:

Answer:

Refer to the attachment

(a) First, we need to write the combustion reaction for ethanol (CH3CH2OH)

CH3CH2OH + O2 → CO2 + H2O

Then, we need to balance this equation. To do that, remember to start with C, then move on to H and finally balanced the amount of O:

CH3CH2OH + 3 O2 → 2 CO2 + 3 H2O

(b) Since this is a reaction that realeases heat (726.7 kJ /mol of ethanol), we know that is an exothermic reaction and the general scope of an enthalpy diagram would be like this:

Where, for the combustion of ethanol, the reactants would be CH3CH2OH + O2, the products would be CO2 + H2O, and ΔH would be -726.7 kJ/mol

Answer:

3.01 * 10 ^ 23 atoms of Pt

Explanation:

1 mole of Pt contains 6.02 * 10 ^ 23 atoms of Pt

195.084 g of Pt has  6.02 * 10 ^ 23 atoms of Pt  

97.6 g = .5 moles so  

97.6 g of Pt has 3.01 * 10 ^ 23 atoms of Pt

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

Given:

The mass of platinum = 97.6 grams

To find:

The number of platinum atoms in 97.6 grams.

Solution:

Mass of platinum = 97.6 g

Moles of platinum =\(\frac{97.6g}{195.084 g/mol}=0.500 mol\)

According to the mole concept:

1 mole = Avogadro Number = \(N_A=\) \(6.022\times 10^{23} atoms/ molecules/ions\)

The number of platinum atoms in 0.500 moles of platinum:

\(=0.500\times 6.022\times 10^{23} atoms\\\\=3.011\times 10^{23} atoms\)

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

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The balanced molecular equation for this reaction is

2HCl(aq) + Ba(OH)2(aq) ===> BaCl2(aq) + 2H2O(l).

The neutralization of hydrochloric acid and barium hydroxide.

Molecular formula for hydrochloric acid is HCl and barium hydroxide is Ba(OH)2.

Hydrochloric acid and barium hydroxide is aqueous in nature.

HCl have one H+ ion and barium hydroxide has two hydroxide (OH) group.

So, it will take two HCl to neutralize one Ba(OH)2.

Hence, equation for this reaction is

2HCl(aq) + Ba(OH)2(aq) ===> BaCl2(aq) + 2H2O(l).

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A balanced chemical equation describes a reaction where the number of each type of atom on one side of the equation is equal to the number of the same sort of atoms on the other side of the equation.

In other words, the number of atoms of each element is the same on both sides of the equation, obeying the rule of conservation of mass.

For instance, the balanced formula for the combustion of oxygen and methane is CH4 + 2 O2 -> CO2 + 2 H2O.

On either side of the equation, there are 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms.

The chemical equation must be in balance in order to employ the right quantity of reactants and products and to forecast how much reactant will be used and how much product will be produced.

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Answer:

the correct answer is lost of jobs,higher taxes, and elimination of tourist activities

Explanation:

hope you have a blessed day:)

Answer:

the correct answer is lost of jobs,higher taxes, and elimination of tourist activities

Explanation:

thank you for the answer i hope EVERYONE has A BLESSED DAY!!!!!!!!!!!!!!!!!!!!!!

To save an unhealthy lawn, undertake a scientific project involving soil analysis, adjusting soil conditions, implementing proper watering practices, addressing pest and weed control, ensuring proper mowing techniques, monitoring and maintaining the lawn, and seeking professional advice if needed.

Identify the problem: Determine the specific issues affecting the lawn, such as discoloration, patchy areas, or pests. Observe the lawn closely to identify any underlying causes for its unhealthy condition.

Conduct soil analysis: Collect soil samples from different areas of the lawn and perform a soil analysis. This analysis will provide information about the soil's pH level, nutrient composition, organic matter content, and any imbalances that may be contributing to the lawn's poor health.

Adjust soil conditions: Based on the soil analysis results, take necessary steps to correct any imbalances or deficiencies. This may involve adding fertilizers to provide essential nutrients, adjusting the pH level with soil amendments, or enhancing soil structure by adding organic matter.

Implement proper watering practices: Evaluate the lawn's watering regimen. Ensure the lawn receives adequate water but avoid overwatering, as it can lead to fungal growth and shallow root development. Use a targeted watering approach, focusing on the lawn's needs and avoiding water wastage.

Address pest and weed control: Identify any pests or weeds affecting the lawn's health. Implement appropriate pest management strategies, such as using organic or chemical-based pest control methods. Remove weeds manually or apply herbicides selectively to prevent competition with the grass.

Ensure proper mowing techniques: Evaluate the lawn's mowing practices. Adjust the mowing height to the appropriate level for the grass species and avoid cutting too short, as it can stress the grass and make it more susceptible to disease and pests.

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One methyl group and one ethyl group.

A compound can be obtained by a combination of atoms. We know that an organic compound would have a parent chain which is the longest straight chain of carbon atoms. There are normally side chains that could be attached to the longest chain.

We can see the compound that we are analyzing to be 4‑sec‑butyl-5-ethyl-3-methyloctane. The image of the compound is found in the image attached to this answer.

We can see that there is one methyl group and one ethyl group.

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Noble gases have completely filled electronic configuration. Therefore, noble gases or group 18 elements are inert in nature.

Noble gases are 18th group elements in periodic table. They are all having complete filled electronic configuration. The group members are helium, neon, argon, krypton, xenon and radon.

All these elements are existing in gaseous state and they are unreactive. Atoms become reactive when they have extra electrons or are deficient of electrons. Thus to achieve octet, they bond with other atoms.

In the case of noble gases, the valence shell is already achieved octet and no need of lose or gain of electrons. Thus, they are generally inert.

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Answer:

Melting

Explanation:

Once heat is added it will turn to a liquid

Melting is the process of turning solid to liquid.

Determine quantitative density of a liquid whose mass is 62 g and whose volume is 31 mL. A block or wood with the dimensions 3 cm x 2 cm x 5 cm and a heft of 22.5 g (2 g/mL)

How do you calculate a block of wood's volume?

Result for an image A timber block weighs 22.5 grammes and has dimensions of 3 cm x 2 cm x 5 cm. What is that?

It is simple to determine the volume of such a block, prism, a cylinder by multiplying the base's area by the object's height or altitude.

How is block mass determined?

Multiply the volume and density together.

You may get the mass of your object by multiplying your two numbers together. You'll notice that you end up having units of mass if you keep track of both the units as you go along (kilograms or grams). A diamond, for instance, has a volume of 5,000 cm3 and a density of 3.52 g/cm3.

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Determine quantitative density of a liquid whose mass is 62 g and whose volume is 31 mL. A block or wood with the dimensions 3 cm x 2 cm x 5 cm and a heft of 22.5 g (2 g/mL)

Result for an image A timber block weighs 22.5 grammes and has dimensions of 3 cm x 2 cm x 5 cm. What is that?

It is simple to determine the volume of such a block, prism, a cylinder by multiplying the base's area by the object's height or altitude.

Multiply the volume and density together.

You may get the mass of your object by multiplying your two numbers together. You'll notice that you end up having units of mass if you keep track of both the units as you go along (kilograms or grams). A diamond, for instance, has a volume of 5,000 cm3 and a density of 3.52 g/cm3.

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Arrhenius acid increases the concentration of hydrogen ion in an aqueous solution and Arrhenius base increases the concentration of hydroxide ion in an aqueous solution.

Arrhenius acid dissociates in aqueous solution to form hydrogen ion. In aqueous solution Arrhenius acid increases the concentration of hydrogen ions.  

Arrhenius base dissociates in aqueous solution to form hydroxide ion. In aqueous solution Arrhenius base increases the concentration of hydroxide ions.

In aqueous solution of hydroxide ions bases dissociates. Greater the concentration of base means greater the concentration of hydroxide ion. If hydroxide ion concentration is more then pH will be less.

Thus, we can say that Arrhenius acid increases the concentration of hydrogen ion in an aqueous solution and Arrhenius base increases the concentration of hydroxide ion in an aqueous solution.

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Answer: pizza crust, Vegetables, Dairy, Meat, and Dairy

Explanation:

The pizza crust is important, not only to deliver those mouthwatering toppings to your anxiously waiting taste buds, but to provide vital nutrients from grains. Vegetables are a common and delicious topping for pizza. These toppings provide an array of nutrients and including multiple servings of vegetables in your diet every day is a necessary part of a healthy lifestyle. If you get meat on your pizza, it is an excellent source of protein. All meat is high in protein and iron, which are necessary to build muscle. Cheese is a good source of the calcium we all need for strong bones and teeth. Cheese is also a good source of protein.

A bread crust contains carbohydrate, vegetables contains vitamins, cheese contain calcium and protein, meat contain protein.

Nutrients are the substance that makes a body healthy.

Food material contain different nutrients that help in growth of the body.

In pizza, we get all type of nutrients

A bread crust contains carbohydrate which provide energy.

Vegetable contains vitamins to keep the body parts healthy.

Cheese contain calcium and protein which maintain the growth and repairing of the body.

Meat contain protein, good for muscles.

Thus, A bread crust contains carbohydrate, vegetables contains vitamins, cheese contain calcium and protein, meat contain protein.

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Answer:

Option B

Explanation:

Use Avogadro constant of 6.02 x 10^23

For Option A,

1.9 moles x (6.02 x 10^23) = 1.1438 x 10^24

For Option B,

5.3 moles x (6.02 x 10^23) = 3.1906 x 10^24

For Option C,

9.5 moles x (6.02 x 10^23) = 5.719 x 10^24

For Option D,

19.2 moles x (6.02 x 10^23) = 1.1558 x 10^25

Therefore, the nearest one to 3.2 x 10^24 is Option B