Convert 22.0 mL to L

a. The reactants are H2 and O2

b. The product is H2O

c. Yes, the reaction balanced because the number of atoms of each element is the same. It can be seen from coefficient and index on the compound

The statement describes conditions in which a mineral can form is "Crystals of minerals dissolve in the groundwater in caves."

Atoms of the relatively similar element and atoms of other elements [such as silica (Si) and calcium (Ca)] can make up a crystal, and they are arranged in a predictable, repeating pattern.

A mineral would be an element as well as a chemical compound which has been produced as a result of geological activity and is often crystalline in nature.

The statement describes conditions in which a mineral can form as "Crystals of minerals dissolve in the groundwater in caves."

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Answer:

4.08 grams

Explanation:

Essentially, we're looking for the mass of HCl that "matches" 3.26 grams of magnesium hydroxide.

First, convert 3.26 grams of \(Mg(OH)_2\) into moles by dividing by the molar mass. The molar mass of \(Mg(OH)_2\) is 24.3 + 16 * 2 + 1 * 2 = 58.3 g/mol. So, 3.26 grams is equal to:

3.26 g ÷ 58.3 g/mol = 0.0559 mol \(Mg(OH)_2\)

Notice that from the chemical equation, magnesium hydroxide and hydrochloric acid (HCl) have a ratio of 1 to 2. In other words, for every 0.0559 moles of \(Mg(OH)_2\), there are 0.0559 * 2 = 0.112 moles of HCl.

Finally, convert moles of HCl to grams by multiplying 0.112 by the molar mass, which is 1 + 35.45 = 36.45 g/mol:

0.112 mol HCl * 36.45 g/mol = 4.08 g HCl

The answer is thus 4.08 grams.

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Endotherms are able to maintain a stable body temperature that is several degrees warmer than their environment through a combination of metabolic heat production and behavioral mechanisms.

Metabolic heat production refers to the heat generated by the body's internal processes, including the breakdown of food and the use of oxygen. Endotherms have a high metabolic rate, which allows them to generate heat and maintain their body temperature.

In addition to metabolic heat production, endotherms also use behavioral mechanisms to regulate their body temperature. For example, they may seek out warmer or cooler environments to maintain their ideal temperature. They may also alter their activity level, such as huddling together for warmth or seeking shade to cool down.

Finally, endotherms have a sophisticated vasomotor control system that helps to regulate their body temperature. This system involves the contraction and relaxation of blood vessels, which can help to direct blood flow to areas of the body that need to be cooled or warmed. Overall, the combination of metabolic heat production, behavioral mechanisms, and vasomotor control allows endotherms to maintain a stable body temperature despite changes in their environment.

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Answer:Pure water does not contain fluoride, but much drinking water does contain fluoride that is deliberately added to reduce tooth decay of children who drink the water. Some drinking water supplies also contain fluoride naturally.

Explanation:

in small doses not harmful

Fluoride is a chemical that is intentionally added to drinking water in order to prevent tooth decay in children. Pure water does not naturally contain fluoride. Some sources of drinking water naturally contain fluoride as well.

Fluoride is a chemical that is intentionally added to drinking water in order to prevent tooth decay in children. Pure water does not naturally contain fluoride. Some sources of drinking water naturally contain fluoride as well.

Compared to magnesium found in food, magnesium in water is present as hydrated ions, which are more easily absorbed. Thus, the role played by water magnesium in the prevention of magnesium insufficiency may be quite important for people who drink water with high magnesium levels.

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The mass of HNO3 obtained is 12.46 g from the given reaction.

The chemical reaction is :

Potassium Nitrate + Sulphuric acid ------> Potassium Bisulphate + Nitric acid.

The above reaction is basically used for the making of nitric acid.

Less than 200 degree celcius the Nitric acid if more than 200 degree celcius then it will form Potassium Sulphate.

Now,

1 mol of KNO3 reacts with1 mol of concentrated H2SO4 to give 1 mol HNO3

Molar Mass of KNO3 = 101.1 g

Molar mass of H2SO4 = 98.07 g

Mass of H2SO4 that can react with 20 g of KNO3 = (20 g* 98.07 g )/ 101.1 g

= 19.4 g

Molar mass of nitric acid= 63.01 g

Hence mass of nitric acid  produced by 20 g of KNO3 = (20 g * 63.01 g ) / 101.1 g = 12.46 g

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Answer:

M2 = 0.95M

Explanation:

M1V1 = M2V2

(1.9)(0.5) = M2(1)

M2 = 0.95M

Answer:

I think it erosion

Explanation:

Well erosion washes away top soil

0.440 L of nitrogen trichloride will be produced after 10 minutes.

The reaction between nitrogen gas and chlorine gas to produce nitrogen trichloride is:

N2 (g) + 3Cl2 (g) → 2NCl3 (g)

To determine the amount of nitrogen trichloride produced, we need to calculate the limiting reactant first. The mole ratio between N2 and Cl2 is 1:3, which means that every mole of N2 requires 3 moles of Cl2 to react completely.

Using the ideal gas law, we can calculate the number of moles of each gas present in the flask:

n(N2) = PV/RT = (0.666 atm) x (2 L) / (0.0821 L·atm/K·mol) x (400 K) = 0.040 mol

n(Cl2) = PV/RT = (0.333 atm) x (2 L) / (0.0821 L·atm/K·mol) x (400 K) = 0.020 mol

Since N2 and Cl2 are in a 1:2 ratio, we can see that Cl2 is the limiting reactant. Therefore, all of the Cl2 will be consumed in the reaction, and the amount of N2 consumed will be 0.010 mol (which is 0.020 mol Cl2 / 2). From the balanced chemical equation, we can see that every 3 moles of Cl2 react with 1 mole of N2 to produce 2 moles of NCl3. Therefore, the amount of NCl3 produced will be:

n(NCl3) = 2/3 x n(Cl2) = 2/3 x 0.020 mol = 0.0133 mol

Finally, we can use the ideal gas law again to calculate the volume of NCl3 produced at the same temperature and pressure as the initial gases:

V(NCl3) = n(NCl3)RT/P = (0.0133 mol) x (0.0821 L·atm/K·mol) x (400 K) / (1 atm) = 0.440 L

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The atomic mass of the element is approximately 122.6 amu.

To calculate the atomic mass of the element, we need to consider the weighted average of the masses of its naturally occurring isotopes, taking into account their relative abundances.

Given:

Isotope 1 mass (m1) = 120.9 amu

Isotope 1 relative abundance (a1) = 57.4%

Isotope 2 mass (m2) = 122.9042 amu

To calculate the atomic mass (M) of the element:

M = (m1 * a1 + m2 * a2) / 100

Substituting the given values:

M = (120.9 amu * 57.4% + 122.9042 amu * (100% - 57.4%)) / 100

M = (69.6276 amu + 52.9726 amu) / 100

M = 122.6002 amu / 100

M ≈ 1.226002 amu

Therefore, the atomic mass of the element is approximately 122.6 amu.

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Five waves measure 25 cm and pass a point in 1 s then the wavelength is 5cm the frequency is 5Hz and the period is 5 s

Here given data is

Five waves measure 25 cm and pass a point in 1 s

So, the wavelength = λ = v/f

Wavelength =  25 cm/5 waves

Wavelength = 5cm

Frequency = 1/T

Frequency = 1/5 = 5Hz

Period = 1/frequency

Period = 1/5 = 5 s

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C = m V . The unit of concentration is typically given as g/mL because the solute mass is frequently given in grammes and the volume is frequently given in milliliters. However, there are a tone of other mass and volume unit combinations that are possible.

Given that a solution consists of both a solute and a solvent, its total volume is equal to the sum of the volumes of both the solute and the solvent it contains.

A solution's concentration is an indicator of how much solute has dissolved in a specific volume of solvent or solution. When there is a significant amount of dissolved solute in a solution, it is said to be concentrated. When a dissolved solute is present in a solution, it is said to be diluted.

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Dendral was the first expert system developed to determine the chemical structure of molecules.

A molecule refers to a set of (2) or more atoms that are chemically bonded collectively, which allows you to form the smallest essential unit of a chemical compound. additionally, molecules are capable of taking elements in a chemical reaction.

A molecule is the smallest particle of a substance that has all of the physical and chemical houses. Molecules are made up of one or extra atoms. A molecule is a hard and speedy of or greater atoms held together via the use of a way of appealing forces called chemical bonds.

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Answer:

B. po ang sagot

Explanation:

When you mix equal volumes of 1 M CH3COOH and 1 M NaOH, the resulting solution is not a buffer solution.

This is because a buffer solution requires a weak acid and its conjugate base or a weak base and its conjugate acid. The reaction between acetic acid (CH3COOH) and sodium hydroxide (NaOH) is a neutralization reaction.

The reaction produces sodium acetate (NaCH3COO) and water (H2O).CH3COOH + NaOH → NaCH3COO + H2OAcetic acid is a weak acid, and sodium hydroxide is a strong base. The reaction between a strong base and a weak acid produces a salt and water. The resulting solution is not a buffer solution.

Hence, the correct option is option (B). Notably, a buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. A buffer solution contains a weak acid and its conjugate base or a weak base and its conjugate acid.

When a strong acid or strong base is added to a buffer solution, it reacts with the weak acid or weak base in the buffer solution, forming the conjugate base or conjugate acid, respectively. This helps to maintain the pH of the buffer solution.

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Answer:

It refers to the conventional sense of the elastic current

Explanation:

It is the traditional or the conventional sense of the elastic current as in the earlier days the experimenters and the scientist thought that the current moves out of the positive terminal or pole of the battery and enters through the negative pole or terminal of the battery.

It is because of the direction of the current flow as thought in early days, the sentence refers to the conventional sense.

The substance which can move across a barrier by the process of osmosis is water substance.

Osmosis is defined as a process in which the solvent molecules are passed through a semi-permeable membrane from a lower concentrated region to the higher concentrated region. The osmosis is a passive process, which drives the internal energy of the solvent molecules. Some examples of osmosis process are diffusion of gases like O₂ and CO₂, diffusion of benzene and ethanol etc. In this method, the solution is passed through the semi-permeable membrane and the solvent is separated from the solution. When solvent is separated, then the solution is diluted.

Therefore, water molecule can move across a barrier by osmosis.

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The empirical formula of tartaric acid is C₄H₆O₆.

Tartaric acid is a compound that contains carbon (C), hydrogen (H), and oxygen (O). To determine its empirical formula, we need to analyze the given information about the production of carbon dioxide (CO₂) and water (H₂O). From the data, we can calculate the mole ratios of carbon, hydrogen, and oxygen in the compound.

Using the molar masses of carbon (12.01 g/mol), hydrogen (1.008 g/mol), and oxygen (16.00 g/mol), we can convert the given masses of CO₂ and H₂O to moles. From the balanced chemical equation of the reaction, we know that 1 mole of butyric acid produces 4 moles of CO₂ and 2 moles of H₂O.

By dividing the number of moles of carbon and hydrogen by the smallest number of moles obtained, we find that the empirical formula of tartaric acid is C₄H₆O₆. This means that tartaric acid consists of four carbon atoms, six hydrogen atoms, and six oxygen atoms in its simplest, empirical form.

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The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Answer:

D

Explanation:

0.0102 moles Na₂CO₃ is  1.08g of Na₂CO₃ are necessaries .

Define Stoichiometry .

The quantitative study of the reactants and products involved in a chemical reaction .

What is a mole ?

A standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

How to calculate the molecular weight of a given compound ?

Count the number of atoms of each element, and then multiply that number by the element's atomic weight.

Based on the reaction :

CaCl₂ + Na₂CO₃ → 2NaCl + CaCO₃

1 mole of CaCl₂ reacts per mole of Na₂CO₃

Further we are suppose to calculate number of moles of CaCl2•2H2O present in 1.50 g.

To solve this question we must find the moles of CaCl2•2H2O using its molar mass (147.0146g/mol).

No. of moles = Moles CaCl₂ = Moles of Na₂CO₃ necessaries to reach stoichiometric quantities.

Then find then the mass we must use molar mass of Na₂CO₃ (105.99g/mol):

Moles CaCl₂.2H₂O:

1.50g * (1mol / 147.0146g) = 0.0102 moles CaCl₂.2H₂O = 0.0102moles CaCl₂

Moles Na₂CO₃:

0.0102 moles Na₂CO₃

Mass Na₂CO₃:

0.0102 moles * (105.99g / mol) =

1.08g of Na₂CO₃ are present

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Answer:

Renewable

Explanation:

Reformed means it can be used multiple times, like renewable

Answer:Super-giants

Explanation:

Answer:

The chemical name is C16H11N2NaO4S

Explanation:

Doubling Earth's atmospheric CO₂ levels would lead to significant and potentially devastating changes to our planet's climate, ecosystems, and human well-being.

If Earth's atmospheric carbon dioxide (CO₂) levels were to double, scientists predict several significant consequences for our planet. Firstly, a major increase in global temperatures would occur due to the greenhouse effect. CO2, being a greenhouse gas, traps heat within Earth's atmosphere, leading to a rise in average temperatures, known as global warming.

This increase in temperature would result in the melting of polar ice caps and glaciers, causing a rise in sea levels. This, in turn, would lead to increased coastal flooding and the potential loss of habitats and infrastructure in low-lying areas. Additionally, weather patterns could become more extreme and unpredictable, with increased occurrences of droughts, storms, and floods, causing negative impacts on agriculture and ecosystems.

Moreover, higher CO₂ levels would lead to ocean acidification, a process wherein CO₂ dissolves in seawater, creating carbonic acid. This change in ocean chemistry would have severe consequences for marine life, particularly for organisms with calcium carbonate shells, such as corals, mollusks, and some plankton species, affecting the entire marine food chain.

Lastly, increased CO₂ levels would impact human health, with higher temperatures exacerbating air pollution, causing respiratory issues, and worsening existing health conditions.

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Pneumonoultramicroscopicsilicovolcanoconiosis is a lung condition brought on by breathing in extremely fine silica dust, which is typically found in volcanoes.

It has 42 letters and is the longest accepted binomial formation, making it one of the longest words. This term describes a fly species that is indigenous to Thailand. Another word that has entered the lexicon is this one.

You might think it's ridiculous (and maybe it is), but Oxford English Dictionary editors recently announced that "run" has actually become the single word in all of English with the most possible meanings, boasting no less than 645 different use situations for the verb form alone.

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The substance that is usually one of the limiting amino acids in foods, particularly those of plant origin, can vary depending on the specific food. However, common limiting amino acids in plant-based foods include methionine and lysine. Therefore, option c, methionine, is likely the correct answer to your question.

Methionine (c) is usually one of the limiting amino acids in foods, particularly those of plant origin. Limiting amino acids are those that are present in the lowest quantity relative to the body's requirements, and they can limit the utilization of other amino acids in protein synthesis.

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Answer:

The amount of zinc for a given amount are 0.0082 moles.

Explanation:

Answer:

No. of moles = 0.0082

Explanation:

To calculate the number of moles of a substance given its mass, we can use the following formula:

\(\boxed{\mathrm{No. \ of \ moles = \frac{Mass}{Molar \ mass}}}\)

The molar mass of zinc is 65 g/mol. The given mass of Zn in this question is 0.535 g. Using this information and the formula above, we can calculate the number of moles of Zn:

No. of moles = \(\mathrm{\frac{0.535 \ g}{65 \ g/mol}}\)

                     = 0.0082 mol

Therefore, there are 0.0082 mol Zn in 0.535 g of Zn.