How has the United States government tried to preserve water sources?

Answer:

a representation of the valence electrons of an atom that uses dots around the symbol of the element. The number of dots equals the number of valence electrons in the atom.

Answer:

A electron dot diagram is a representation of the Valence electron of an atom that uses dots around the symbol of the element

Simplified answer = The Valence Electrons

Answer:

Incomplete combustion of fuels produces a very poisonous gas called carbon monoxide:Excessive inhaling of carbon dioxide gas can kill a person.

I don't know if this is correct, your question did not have much context.

Answer:Electrical Conductivity,soluble

Explanation:

Salt is a non-magnetic solid and is soluble in water. Sand is a non-magnetic solid and is insoluble in water.

Electrical Conductivity: Salt is an electrolyte and conducts electricity when dissolved in water or in a molten state. This is because salt dissociates into ions (Na+ and Cl-) that can carry electric current. In contrast, sand is a covalent compound and does not conduct electricity, as it does not dissociate into ions in the same way as salt. Sand is considered an insulator in terms of electrical conductivity.

The maximum amount of product that can be obtained from given amounts of reactants in a chemical reaction. The correct answer is C.

A chemical reaction is a process that causes one group of chemical components to change chemically into another. Reactants are substances that interact to make new substances, whereas products are those substances that result from the interaction.

Chemical Reaction Types

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Answer:

Pubic hair smells bad

Explanation:

The valency of elements tends to decrease as we move down the periodic table of non-metal and metal.

The ability of an element to combine is referred to as valency. It is the number of electrons that an elemental atom loses, gains, or shares with another atom to form a stable configuration of electrons.

The occasional table is organized so that components with comparable valencies are set in a similar gathering. Components in a similar gathering have similar number of valence electrons, which decides their substance properties.

The valency of the elements tends to decrease as we move down a periodic table of metals and non-metals. This is because the number of electron shells, or energy levels, increases as we move down a group. The peripheral electrons in a particle are the valence electrons.

The expanded distance between the core and the peripheral electrons brings about more vulnerable fascination between them. As a result, the atom becomes more reactive and can lose or gain electrons more easily.

For instance, in bunch 1 of the occasional table, the valency of the components diminishes as we drop down the gathering. The valencies of lithium (Li), sodium (Na), and potassium (K) are, respectively, 1, 1, and 1.

This is due to the fact that each possesses one valence electron. Because the outermost electron is further from the nucleus and therefore more likely to be lost or gained, the valency decreases as we move down the group.

In conclusion, as we move down the periodic table, from non-metal to metal, the valency of elements tends to decrease. This is because the nucleus and the outermost electrons are less attracted to one another as the energy levels rise.

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For marshmallows, Graham Cracker and Chocolate Pieces:

1. To calculate the molar mass of S₂MmOr₃, we need to add up the individual molar masses of each element in the compound, as follows:

S: 1 × 32.06 g/mol = 32.06 g/mol

Mm: 2 × 12.01 g/mol + 4 × 1.01 g/mol + 3 × 15.99 g/mol = 88.15 g/mol

Or: 3 × 16.00 g/mol = 48.00 g/mol

Molar mass of S₂MmOr₃ = (2 × 32.06 g/mol) + (88.15 g/mol) + (3 × 48.00 g/mol) = 296.37 g/mol

2. The balanced chemical equation for the formation of S₂MmOr₃ is:

2S + 2Mm + 3Or → S₂MmOr₃

3. To find the number of moles of marshmallows in one bag, we need to divide the mass of marshmallows by the molar mass of marshmallows:

Number of moles of marshmallows = 454 g ÷ 88.15 g/mol ≈ 5.15 mol

4. Since the ratio of graham crackers to marshmallows to chocolate pieces in the S'more compound is 2:2:3, we need an equal number of moles of graham crackers and marshmallows, and 1.5 times the number of moles of chocolate pieces. Therefore:

Number of moles of graham crackers = 2 × 5.15 mol = 10.3 mol

Number of moles of chocolate pieces = 3 × 1.5 × 5.15 mol = 23.18 mol

The maximum number of S'mores using 5.15 mol of each ingredient, which corresponds to 5.15 mol ÷ 2 mol per box = 2.575 boxes of graham crackers and 23.18 mol ÷ (3.3 g/mol) = 76.42 chocolate bars (rounded up to the nearest whole number).

5. To use up all the marshmallows, we need 5.15 mol of graham crackers, which corresponds to (5.15 mol × 7.00 g/mol) ÷ 254 g per box = 0.142 boxes of graham crackers. Since we can't buy a fraction of a box, we need to round up to the nearest whole box, which gives us:

Number of boxes of graham crackers = 1 box

Therefore, we need one box of graham crackers to use up all the marshmallows.

6. To use up all the marshmallows, we need 5.15 mol of chocolate pieces, which corresponds to (5.15 mol × 3.30 g/mol) ÷ 49.5 g per chocolate bar = 0.344 chocolate bars. Since we can't buy a fraction of a chocolate bar, we need to round up to the nearest whole chocolate bar, which gives:

Number of chocolate bars = 1 chocolate bar

Therefore, we need one chocolate bar to use up all the marshmallows.

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Answer:

b.

Explanation:

From the given information:

\(p = \dfrac{zM}{N_oa^3}\)

where;

a = 0.41 nm = \(4.1 \times 10^{-8} \ cm\)

M = 90.5 + 37.3 = 127.8 g/mol

\(N_o = 6.023 \times 10 ^{23}\)

p = 3.15 g/cm³

∴

\(3.15 = \dfrac{z \times 127.8}{(6.02 \times 10^{23}) \times (4.1 \times 10^{-8} )^3}\)

Z = 1

Thus, the ceramic material has a simple cubic crystal system and the crystal structure is possible to be Cesium chloride.

Answer:

If the density of the material is equal to the density of the material you have been working with it is possible that the samples are the samples

Explanation:

Density is an intensive property of the matter (Doesn't depends of its amount) that is widely used to identify a substance. Density is the ratio between the mass of the substance (In this case 25.62g) and the volume this amount occupies (21.9cm³). The density is:

25.62g / 21.9cm³ =

1.17g/cm³.

According to the information, we can infer that a 19.2-pound child would need to take approximately 2.49 tablets of 250.0 mg ampicillin per day.

To calculate the number of tablets the child needs to take, we first need to convert the weight of the child from pounds to kilograms. Since there are 2.20 pounds in 1 kg, we divide 19.2 pounds by 2.20 to get the weight in kilograms, which is approximately 8.73 kg.

Next, we calculate the daily dose of ampicillin for the child by multiplying the weight in kilograms by the recommended dosage of 115 mg/kg.

Since the available tablet size is 250.0 mg, we divide the total daily dose by the tablet size to find out how many tablets the child needs to take per day.

According to the above, we can infer that since we can't have a fraction of a tablet, we round the result to the nearest whole number. Therefore, a 19.2-pound child would need to take approximately 2.49 tablets (rounded to 2) of 250.0 mg ampicillin per day.

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B. Cao(s) (Calcium oxide)

The balanced equation would be:

Ca(s) + O2(g) --> Cao(s)

It is the product of Calcium oxide.

The product of the reaction between sodium and chlorine is sodium chloride (NaCl). When sodium (Na) and chlorine (Cl) react, they form an ionic bond, with the sodium atom losing one electron to the chlorine atom. This forms a positively charged sodium ion (Na+) and a negatively charged chloride ion (Cl-), which are held together by electrostatic attraction to form the compound sodium chloride. It is a white crystalline solid and is commonly known as table salt.

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Answer:

C) one magnesium and one oxygen

Answer:

answer is 60 inches ^3.

multiply!

Answer:

each year they are adding £31.25 to the bank account as £31.25 =£375 and times by 5 is £1875 but i did not include the $100 at the beginning

Explanation:

Answer:

H+ (aq) + OH- (aq) → H2O (l)

Explanation:

The net ionic equation is the main reaction going on in the system. The reaction between nitric acid and sodium hydroxide is a neutralization reaction.

In a neutralization reaction, the main reaction is the combination of hydrogen ions and hydroxide ions to form water. This reaction has been shown in the answer box.

Answer:

The reaction of 4-acetyl anisole (also known as p-methoxyacetophenone) with hydroiodic acid (HI) results in the cleavage of the O-methyl group of the anisole ring, leading to the formation of iodobenzene and acetophenone. The balanced equation for this reaction is C9H10O2 + HI → C6H5I + C8H8O.

So, the product of the reaction of 4-acetyl anisole with HI is a mixture of iodobenzene and acetophenone. The specific ratio of these products will depend on the reaction conditions, such as the temperature and concentration of the reactants.

It's worth noting that the reaction between 4-acetyl anisole and HI is an example of a nucleophilic aromatic substitution reaction, which involves the replacement of a leaving group (in this case, the O-methyl group) on an aromatic ring by a nucleophile (the iodide ion from HI).

Answer:

This movement releases energy and generates seismic waves that can be recorded by specialized instruments used by scientists. The point on a fault at which the first movement or break occurs during an earthquake is called the earthquake's hypocenter

Explanation:

Answer:

Phosphorus

Explanation:

Lewis Dot Structure is a structural representation of a molecule that shows valence electrons of a molecule.

The element in group 15, period 3 is Phosphorus (P). Phosphorus has an atomic number 15 and valence electrons are 5. So, the lewis structure will show 5 dots around P atom.

Answer:

yes

Explanation:

Crystal shape: A mineral with an unhindered growth environment may have a particular geometric shape.Color is an easy-to-identify but not necessarily dependable quality; a single mineral may exist in several

Color may have a significant effect on how we feel and perceive things. It has the power to arouse emotions of warmth or coldness, harmony or discord, and even to affect our hunger and mood. Color is utilised in both design and art to provide contrast, balance, and focus points. Color may be used in branding and marketing to evoke connections, communicate a message, or express an emotion. Color may be categorised and described in a variety of ways, such as by hue, saturation, and value. Design, art, and psychology all benefit from an understanding of colour theory, which is the study of colour and its effects. Millions of distinct

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Humidity refers to the amount of moisture present in the air or atmosphere. It is a crucial atmospheric parameter that impacts various aspects of our environment and daily lives.

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Answer:

potassium chloride (KCl)

Explanation:

The reaction between aqueous potassium hydroxide and aqueous iron (III) hydroxide is a double replacement reaction.

3 KOH + FeCl₃ → 3 KCl + Fe(OH)₃

Hope that helps.

Answer:

The correct answer is

\(Fe(OH)_{3}\)

Explanation: I tried the KCI and it was incorrect but it showed the answer so here you go!

The change in the system's Gibbs free energy that occurs during a reaction is thus equal to the change in the system's enthalpy minus the change in the product of the temperature times the entropy of the system.

Free energy \(\Delta\) G = \(\Delta\) H - T \(\Delta\) S = -9.72 -200 * -26.1 =  5210.28 J

\(\Delta\) G = change in Gibbs Free Energy

\(\Delta\)H = change in enthalpy

T = temperature in Kelvin

\(\Delta\) S = change in entropy

\(\Delta\) G = \(\Delta\) H - T \(\Delta\) S = -9.72 -200 * -26.1 =  5210.28 J

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the answer should be a the the question

Answer:

63.2 mA

Explanation:

We all know that:

Current\(I = \dfrac{Q}{t}\)

which can be further expressed as:

\(I = \dfrac{ne}{t}\)

where;

n = number of electrons

e = charge on electrons

t = time (second)

Then; by replacing the values in the question, we have:

\(\dfrac{(9*10^{-4})\times6\times10^{23}\times1.6\times10^{-19}}{22.8\times60}\)

\(= 0.06316 A \\ \\ \mathbf{I= 63.2 \ mA}\)

Answer:

D. Two scientists may have different underlying assumptions that lead them to different conclusions about the same thing.

Explanation:

It's all about how a person analyzes data. Some do it mathmatically while others do it logically. By doing it different ways, you may still come to the same conclusion, despite working at the problem in a different way.

84 oz of 2% acid solution and 48-84 = -36 oz of 10% acid solution must be mixed to make 48 oz of a 7% acid solution.

An acid solution is described as a liquid mixture that occurs when hydrogen ions are released when combined with water.

We have that  x oz of 2% acid solution be mixed with (48-x) oz of 10% acid solution.

The total amount of acid in the 2% solution is 2% * x oz = 0.02x oz.

The total amount of acid in the 10% solution is 10% * (48-x) oz = 1 * (48-x) oz.

The total amount of acid in the 48 oz mixture is 0.02x oz + 1 * (48-x) oz = 0.07 * 48 oz = 3.36 oz.

Hence we can calculate that :

0.02x + 1 * (48-x) = 3.36 and solve for x

0.02x + 48 - x = 3.36

0.02x - x + 48 = 3.36

Adding x to both sides:

0.02x + 48 = 3.36 + x

Subtracting x from both sides:

0.02x + 48 - x = 3.36

Dividing both sides by 0.02:

x = 84 oz

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The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

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