A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. Thie cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) From previous experiments, this chemical reaction is known to release 390. kJ of energy The position of the piston is monitored, piston during the reaction and it is determined from this data that the system does 117-kJ of work on the piston during the reaction. is the reactio exothermic or endothermic ? O exothermic O endothermic Does the temperature of the water bath go up ar down? O up O down O neither Does the piston move in or out? O in O out O neitherDoes heat flow into or out of the gas mixture? O in O out O neither How much heat flows? Round your answer to 3 significant digits

Answer: The burning of fossil fuels releases carbon dioxide, methane and other greenhouse gases into the atmosphere. These gases trap heat in the atmosphere, leading to a gradual increase in global average temperatures, known as global warming. This phenomenon has serious impacts on our environment and ecosystems, including extreme weather events and rising sea levels.

Answer:

Explanation:what’s the answer

Answer: A. With Earth between the Moon and the Sun.

Explanation:

Answer:

Cell

Explanation:

I just passed this unit a month ago.

Answer:

It is 6. Cell

Explanation:

Cells make up the smallest level of a living organism such as yourself and other living things. The cellular level of an organism is where the metabolic processes occur that keep the organism alive. That is why the cell is called the fundamental unit of life.

I really hope this helped. God bless you and have a great day! :-)

Answer:

A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

Explanation:

Conductivity is an example of a physical property. Physical properties are characteristics of a substance that can be observed or measured without changing the substance's chemical composition.

Conductivity specifically refers to a material's ability to conduct electricity or heat. Materials with high electrical conductivity allow electricity to flow easily through them, while materials with high thermal conductivity conduct heat efficiently.

Examples of conductive materials include metals like copper and aluminium, which are widely used in electrical wiring and heat transfer applications due to their excellent conductivity properties.

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Answer:

0.333 atm

Explanation:

Step 1: Given data

Step 2: Convert 30.0 °C to Kelvin

We will use the following expression.

K = °C + 273.15 = 30.0 + 273.15 = 303.2 K

Step 3: Calculate the final pressure of the gas

If we assume ideal behavior and constant volume, we can calculate the final pressure od the gas using Gay-Lussac's law.

P₁/T₁ = P₂/T₂

P₂ = P₁ × T₂/T₁

P₂ = 0.370 atm × 273.15 K/303.2 K = 0.333 atm

39200 mL of a 14.0 M \(HNO_3\) solution should you use to make 840.0 mL of a 0.300 M \(HNO_3\) solution.

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of carbon 12; its symbol is “mol”.

Solution:

\(M_1V_1 = M_2V_2\)

In this case, \(M_1\) = 840.0 mL, \(V_1\)= 14.0 M , \(M_2\)= 0.300 M

Substituting the value in the equation:

\(V_2\) = \(\frac{840.0 X 14.0}{0.300}\)

= 39200 mL

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By substituting the given values and solving for the unknown we have:

The change in Gibb's energy is 3.1kJ and is non-spontaneous.

When we have a +G then the re

Answer:

Neutrons - 5

Protons - 4

Electrons - 4

Explanation:

Beryllium (Be) is the 4th element on the Periodic Table.

It has 4 protons and 4 electrons (neutral charge)

Atomic Mass = # of Protons + # of Neutrons

9 = 4 + x

x = 5 Neutrons

The cation is \(V^3^+\) and the anion is \(Cl^-\) in \(VCl_3\).

An ionic compound is a chemical compound made up of charged ions called cations and anions that are held together by electrostatic forces.

Cations are elements with one or more positive charges because they have more number of protons than electrons.

Anions are elements with one or more negative charges because they have more number of electrons than protons.

An ion which has lost electrons and now has a positive net charge is said to be a cation. An atom's cation is smaller than the neutral atom because electrons are taken out to produce a cation.

An ion which has acquired electrons and now has a negative net charge is called an anion. The anion of an atom is larger than the neutral atom because electrons have been added to produce it.

In Vanadium (III) chloride, vanadium gives 3 electrons and become +3 charge and chlorine gains 1 electron and become -1 charge. Since 3 electrons are given by vanadium, 3 chlorine atoms are bonded, thus the compound is \(VCl_3\).

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Answer:

660 amino acids.

Explanation:

There is 20 amino acids for one base. So you multiply 33x20 to give you 660.

Answer:

Assuming that the DNA strand is read in sets of three nucleotides (codons), then 33 bases would allow for a maximum of 11 codons to be read.

Each codon codes for one amino acid, so 11 codons would allow for the coding of a maximum of 11 amino acids.

Explanation:

Answer:

please give me brainlist and follow

Explanation:

Substance in water + 3 mL Benedict's solution, then boil for few minutes and allow to cool. The common disaccharides lactose and maltose are directly detected by Benedict's reagent because each contains a glucose with a free reducing aldehyde moiety after isomerization.

Glucose and maltose give a positive Benedict test because they have a free carbonyl group to undergo oxidation.

Explanation:

So, from this, we can conclude that glucose and maltose give a positive Benedict test because they have a free carbonyl group to undergo oxidation.

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The formula for the hydrate is BaCl₂ × ₀.₀₈₂H₂O, and the name of the hydrate is Barium Chloride Monohydrate.

Calculating the value of "x" in the combination BaCl₂ × ₓH₂O will help us discover the hydrate's formula and name. The mass of water that was contained in the hydrate is represented by the difference between the mass before and after heating.

Mass of hydrated barium chloride (BaCl₂ × ₓH₂O) = 10.05 g

Mass of anhydrous barium chloride (BaCl₂) = 8.57 g

To find the mass of water lost:

Mass of water lost = Mass of hydrated barium chloride - Mass of anhydrous barium chloride

= 10.05 g - 8.57 g

= 1.48 g

Thus, the molar mass of water (H₂O) is 18.015 g/mol, calculate the number of moles of water lost:

Moles of water lost = Mass of water lost ÷ Molar mass of water

= 1.48 g ÷ 18.015 g/mol

= 0.082 moles

Now compare the moles of water lost to the moles of anhydrous barium chloride that are still present, in order to calculate the value of "x" in the hydrate formula BaCl₂ × ₓH₂O.

One mole of hydrated barium chloride loses "x" moles of water to produce one mole of anhydrous barium chloride, as shown by the chemical equation.

Moles of anhydrous barium chloride = 1 mole

The ratio of moles of water get reduced to moles of anhydrous barium chloride is 1:x, we can set up the following equation:

0.082 moles (water) ÷ 1 mole (anhydrous barium chloride) = 1:x

To solve for x:

x = 0.082

Thus, the formula for the hydrate is BaCl₂ × ₀.₀₈₂H₂O. Hence, name the hydrate, we use the prefix "mono" for the subscript 0.082. The name of the hydrate is Barium Chloride Monohydrate.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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The statement "increasing the force will increase the moment" is true.

This is because the moment is a measure of the turning effect of a force on an object about a pivot point. It is defined as the product of the force and the perpendicular distance between the force and the pivot point. The unit of moment is the newton-meter (Nm) or the joule (J).When a force is applied to an object, it will produce a moment about the pivot point if the force is not acting along the same line as the pivot point. The magnitude of the moment depends on the force applied and the distance of the force from the pivot point. As the force increases, the moment also increases, provided that the distance from the pivot point remains constant. Conversely, if the force remains constant, but the distance from the pivot point increases, the moment also increases. This is because the perpendicular distance is directly proportional to the moment, meaning that a longer distance results in a larger moment.Therefore, it can be concluded that increasing the force applied to an object will increase the moment produced about a pivot point.

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The general gas equation, commonly referred to as the ideal gas law, represents the state of a fictitious ideal gas through an equation. The molar mass of ethylene gas when the pressure is 755.3 mmHg, the temperature is 25.0 °C and it weighs 36.2449 g is 28.29 g/mol.

According to the ideal gas law, the sum of the absolute temperature of the gas and the universal gas constant is equal to the product of the pressure and volume of one gram of an ideal gas.

The ideal gas equation is:

PV = nRT

n = PV / RT

755.3 mmHg = 0.99 atm

25.0 °C = 298 K

R = 0.082 atm·L·mol⁻¹·K⁻¹

Mass of water = 142.3415 - 36.1235 = 106.218 g

Density = Mass / Volume

V = m / d = 106.218 / 0.9970 = 106.53 mL = 0.106 L

n = 0.99 × 0.106 / 0.082 × 298  = 0.00429 mol

Mass of ethylene gas = 36.2449 - 36.1235 = 0.1214 g

Molar mass =  0.1214 / 0.00429 = 28.29 g/mol

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Metal conductivity generally goes down or resistivity goes up with temperature goes up.

Answer: the two parameters change inversely; as hydrogen ion concentration increases, pH falls. due to the logarithmic relationship, a large change in hydrogen ion concentration is actually a small change in pH. For example, doubling the hydrogen ion concentration causes pH to fall by just 0.3.

The percent yield of a chemical response is the proportion of the real yield to the hypothetical yield, communicated as a rate.

In this case, the hypothetical yield is 150 grams of sodium hydroxide, as calculated by the researcher. The genuine yield is 135 grams of sodium hydroxide, as gotten from the experiment.

The percent yield can be calculated utilizing the equation:

Percent yield = (real yield / hypothetical yield) x 100%

Substituting the values given within the issue, we get:

Percent  yield= (135 / 150) x 100%

Percent yield = 0.9 x 100%

Percent yield = 90%

Hence, the percent yield of the experiment is 90%. This implies that 90% of the hypothetical abdicate was gotten within the test.

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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The number of moles of chlorine that are produced if 35.4 grams of aluminum chloride react is 0.37 moles.

The mass in grams of carbon tetrachloride that will be produced from 52.5 grams of Cl₂ is 28.47 grams.

The number of moles of oxygen that are produced if 22.8 grams of potassium chlorate decompose is

The number of moles of chlorine that are produced is calculated as follows:

Equation of reaction:  2 AlCl₃ + 3 F₂ --> 2 AlF₃ + 3 Cl₂

The molar mass of AlCl₃ = 143.5 g/mol

Moles of AlCl₃ that reacted = 35.4/143.5 moles

Moles of Cl₂ produced = 35.4/143.5 * 3/2

Moles of Cl₂ produced = 0.37 moles

The mass in grams of carbon tetrachloride produced will be:

Molar mass of Cl₂ = 71.0 g/mol

Molar mass of carbon tetrachloride = 154 g/mol

Moles of Cl₂ = 52.5/71 moles

Mass of carbon tetrachloride produced = 52.5/71 * 1/4 * 154

Mass of carbon tetrachloride produced = 28.47 grams

The number of moles of oxygen that are produced will be:

Equation of the reaction: 2 KClO₃ ---> 2 KCl + 3 O₂

The molar mass of KClO₃ = 122.5 g/mol

Moles of KClO₃ reacted = 22.8/122.5 moles

Moles of oxygen produced = 22.8/122.5 * 3/2

Moles of oxygen produced = 0.279 moles.

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Answer:

because the water would diloute the chemicals in the vinegar

Explanation:

Answer:

24.0 g C₃H₈

Explanation:

To find the mass of C₃H₈, you need to (1) convert grams CO/H₂ to moles CO/H₂ (via molar mass), then (2) convert moles CO/H₂ to moles C₃H₈ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles C₃H₈ to grams C₃H₈ (via molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 3 sig figs to reflect the sig figs in the given values.

Molar Mass (CO): 12.011 g/mol + 15.998 g/mol

Molar Mass (CO): 28.009 g/mol

Molar Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

Molar Mass (C₃H₈): 3(12.011 g/mol) + 8(1.008 g/mol)

Molar Mass (C₃H₈): 44.097 g/mol

3 CO + 7 H₂ ----> 1 C₃H₈ + 3 H₂O
^           ^              ^

45.8 g CO           1 mole              1 mole C₃H₈          44.097 g
-----------------  x  ------------------  x  --------------------  x  ------------------  =
                           28.009 g           3 moles CO            1 mole

=  24.0 g C₃H₈

87.3 g H₂           1 mole           1 mole C₃H₈          44.097 g
----------------  x  ---------------  x  ---------------------  x  -----------------  =  
                          2.016 g           7 moles H₂             1 mole

=  273 g C₃H₈

It was necessary to find the mass of the products from both of the reactants because you did not know which one was the limiting reagent. The limiting reagent is the reactant which is completely used up first. Because CO produced the smaller amount of product, it must be the limiting reagent. Therefore, the actual amount of C₃H₈ produced is 24.0 grams.

Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.

In 1 mole of calcium carbonate, there are approximately 18.066 x 10^23 moles of oxygen.

To determine the number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3), we need to examine the chemical formula of calcium carbonate and identify the number of oxygen atoms present.

The chemical formula of calcium carbonate is CaCO3. In this formula, we have one calcium atom (Ca), one carbon atom (C), and three oxygen atoms (O).

The subscript numbers in the formula indicate the number of atoms for each element. Therefore, we have:

1 calcium atom (Ca)

1 carbon atom (C)

3 oxygen atoms (O)

To calculate the number of moles of oxygen in 1 mole of calcium carbonate, we multiply the number of oxygen atoms (3) by the Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3) = 3 moles of oxygen x (6.022 x 10^23 molecules/mol)

Calculating this value, we find:

Number of moles of oxygen (O) in 1 mole of calcium carbonate (CaCO3) ≈ 18.066 x 10^23 moles of oxygen

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Out of all the given metals, K (Potassium) is the most reactive metal.

The reactivity of metal depends upon the ease of losing an electron from the outermost shell of its atom. The ability to lose an electron decides the reactivity of the metal. The more the ability to lose an electron of its atom, the more the reactivity of the metal. It further depends on the atomic radius, shielding effect, and nuclear charge.

Potassium is the most electropositive metal atom and has the minimum ionization enthalpy thus it has a greater tendency to lose an electron which makes it the most reactive metal.

The reactivity series of given metals is as follows:

K > Ca > Al > Mn

Thus, Potassium (K) is the most reactive metal.

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