A balloon inflated in a room at 240C
has a volume of 4.00L. The balloon is then
heated to a temperature of 580C. What is
the new volume

The answer is C.less -- freeze -- less​

Answer:

\(0.01molO_2\)

Explanation:

Hello there!

In this case, by considering the definition of molar solution as the moles of solute over volume in liters or cubic meters of solution, we can see that actually 10.0 L of the solution are equal to 10.0 dm³. In such a way, since the concentration is 0.001 mol / dm³, the moles of oxygen that are dissolved turn out to be:

\(0.001mol/dm^3 * 10.0dm^3\\\\0.01molO_2\)

Best regards!

A: "Both chemical and physical weathering occur" and B: "weathering is more rapid along coastlines" describe weathering of the sea floor.

Weathering is the breaking down and alteration of rocks, soils and minerals at or near the Earth's surface, through physical and chemical processes.

Physical weathering involves mechanical processes such as freeze-thaw, abrasion and erosion, which cause rocks and soils to physically break apart into smaller pieces. While chemical weathering involves chemical reactions between the minerals in rocks and soils and the surrounding environment, altering their chemical composition and causing them to break down into new minerals.

In the sea floor, both physical and chemical weathering occur as a result of the exposure to the ocean and its many processes such as wave action, currents and temperature changes. Weathering is more rapid along coastlines due to the increased exposure to these processes and because these areas often experience more severe weather conditions than other parts of the sea floor.

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63.1 g of NaN3 is formed when 50.0 g of sodium is reacted with 40.5 g of nitrogen according to the balanced chemical reaction

The balanced reaction equation is;

2 Na + 3 N2--> 2 NaN3

Number of moles of Na =  50.0 g/23 g/mol = 2.17 moles of Na

Number of moles of Nitrogen = 40.5 g/28 g/mol = 1.45 moles of N2

We have to obtain the limiting reactant, this is the reactant that yields the least number of moles of product.

For Na

2 moles of Na yields 2 moles of NaN3

2.17 moles of Na yields 2.17 moles of NaN3 (reaction is 1:1).

For N2

3 moles of N2 yields 2 moles of NaN3

1.45 moles of N2 yields 1.45 * 2/3 = 0.97 moles of NaN3

So, N2 is the limiting reactant. Mass of product formed depends on the limiting reactant.

Mass of NaN3 = 0.97 moles of NaN3 * 65 g/mol = 63.1 g of NaN3

Therefore, 63.1 g of NaN3 is formed when 50.0 g of sodium is reacted with 40.5 g of nitrogen according to the balanced chemical reaction

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The diagram shows a picture of a compound.

A compound is a substance that is made up of two or more different elements that are chemically bonded together in a specific ratio.

This means that the elements are combined in a way that creates a new substance with different physical and chemical properties than the individual elements.

Compounds can be formed through a variety of chemical reactions, such as combining elements through a chemical bond or through a reaction between an acid and a base.

So for the given diagram, we can see that it represents two or more elements chemically combined.

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Answer:

Slower

Explanation:

The reaction between alkyl halides and sodium iodide-in-acetone is an SN2 reaction. The rate of reaction depends on the concentration of the alkyl halide as well as the concentration of the sodium iodide. It is a bimolecular reaction.

This means that if the concentration of any of the reactants is halved, the rate of reaction decreases accordingly.

Therefore, if the iodide solution is half as concentrated, the reaction is observed to be slower in accordance with the rate law;

Rate = k[alkyl halide] [iodide]

Answer:

1 - Gravitational.

2 - Normal

3 - Tension

4 - Frictional

5 - Centripetal

Explanation:

1. If you drop something, gravity pulls it down to the Earth, So falling towards the earth is gravity.

2. Pushing back on another object is normal, Newton's law: Every action has an equal and opposite reaction.

3. When two forces are pulled on opposite sides, the object must stretch which creates tension. Think of a rubber band. If it is pulled more than the object can stretch, it will tear. Tensile strength refers to how much pulling force an object can withstand before it tears.

4. When objects or molecules rub against other objects or molecules they create friction.

5. Last two options go together.

Balance the following chemical equations:

1. N2 + 3 H2 → 2 NH3

Ex: Synthesis reaction

2. 2 KClO3 → 2 KCl + 3 O2

Single Replacement reaction

3. 2 NaF + ZnCl2 → ZnF2 + 2 NaCl

Decomposition reaction

4. 2 AlBr3 + 3 Ca(OH)2 → Al2(OH)6 + 6 CaBr2

Double Replacement reaction

5. 2 H2 + O2 → 2 H2O

Combustion reaction

6. 2 AgNO3 + MgCl2 → 2 AgCl + Mg(NO3)2

Synthesis reaction

7. 2 Al + 6 HCl → 2 AlCl3 + 3 H2

Decomposition reaction

8. C3H8 + 5 O2 → 3 CO2 + 4 H2O

Combustion reaction

9. 2 FeCl3 + 6 NaOH → Fe2O3 + 6 NaCl + 3 H2O

Double Replacement reaction

10. 4 P + 5 O2 → 2 P2O5

Synthesis reaction

11. 2 Na + 2 H2O → 2 NaOH + H2

Single Replacement reaction

12. 2 Ag2O → 4 Ag + O2

Decomposition reaction

13. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O

Combustion reaction

14. 2 KBr + MgCl2 → 2 KCl + MgBr2

Double Replacement reaction

15. 2 HNO3 + Ba(OH)2 → Ba(NO3)2 + 2 H2O

Double Replacement reaction

16. C5H12 + 8 O2 → 5 CO2 + 6 H2O

Combustion reaction

17. 4 Al + 3 O2 → 2 Al2O3

Synthesis reaction

18. Fe2O3 + 2 Al → 2 Fe + Al2O3

Single Replacement reaction

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Ca-41 has 20 electrons

The elements in nature have several types of isotopes

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Calcium is an alkaline earth metal element that is in group 2 and has the atomic number 20

The isotope of Ca-41 :

Number of protons=number of electrons=number of atoms(neutral atom)

\(\tt _{20}^{41}Ca\rightarrow protons=electrons=20, neutrons=41-20=21\)

Answer: David decides that it is better to create a blend containing 50% NaCl, 33% KCl and 17% CaCl2, than to buy a pre-prepared blend. Calculate how much it will cost to produce 54 tons of his recommended blend

Explanation:

Answer: A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.

Explanation:

The conditions 0°C, and 1 atm pressure represents the STP state. The molar volume of any gas at STP is 22.414 L. The volume of oxygen is 13.04 L.

The volume occupied by one mole of a substance at a given temperature and pressure is called its molar volume at that temperature and pressure. At STP the number of moles is:

Number of moles (n) = Volume in L / 22.414 L

Molar mass of Fe₂O₃ = 159.7 g/mol

n = 62.0 / 159.7

= 0.388 mol

From the equation, 4 Fe(s) + 3 O₂ (g) → 2Fe₂O₃ (s)

0.388 × 3 / 2 = 0.582 mol O₂

Volume of O₂  = 0.582 ×  22.414 = 13.04 L

Thus the volume of oxygen is 13.04 L.

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Answer:

I think ur answer would be B or are wispy

Explanation:

hope this helps <3

The description that refers to cirrus clouds is : ( B ) Are wispy

Cirrus clouds are white, short, detached clouds that look like human hair, they are found mainly at high altitudes and appear wispy looking like a turf of hair. They are the whitest of all clouds but may take the color of the sunset.

Therefore we can conclude that the description that refers to cirrus clouds is that they are wispy.

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Answer:

The strong force binds quarks together in clusters to make more-familiar subatomic particles, such as protons and neutrons. It also holds together the atomic nucleus and underlies interactions between all particles containing quarks. The strong force originates in a property known as colour.

Explanation:

Answer:

  665 kJ

Explanation:

We assume that carbohydrates and protein each have 4 kilocalories per gram, and that fat has 9 kilocalories per gram. Then the number of kilocalories in the peanut butter is ...

  4(6 +9) +9(11) = 159 . . . . kilocalories

Each kilocalorie translates to 4.184 kilojoules, so the total is ...

  (159 kCal)(4.184 kJ/kCal) = 665.256 kJ

2 Tbsp of crunchy peanut butter contains about 665 kJ of energy.

The number of kilojoules in two table spoons of crunchy peanut butter obtained by adding the amount of kilojoules in each food type is 673kJ

From the table given ; the amount of kilojoules per gram of each food type is :

I gram of Carbonhydrate = 17 kJ

6 grams of Carbonhydrate = (6 × 17) = 102 kJ

I gram of Fat = 38 kJ

11 grams of Carbonhydrate = (11 × 38) = 418 kJ

I gram of Protein = 17 kJ

9 grams of Carbonhydrate = (9 × 17) = 153 kJ

Therefore, the total kilojoules present is (102 + 408 + 153)kJ = 673 kJ

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Answer: 4

Explanation: because the zero doesn't count

When an acid is added to water, hydronium ions are formed.

What happens when the acid is added to water?

The acid has the ability to give protons that is hydrogen ions. When acid is added to water, water acts as base and takes up the protons released by the acid and forms hydronium ions that is H3O+ ions.

This process is exothermic in nature that is it releases heat. So acid is always added to water and not water to acid.

Therefore, when an acid is added to water, it gives hydronium ions in the water.

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we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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In an ecosystem, the  impact of soil Science to the development of Ghana's agriculture is that it provides suitable conditions for root germination and growth.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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​

The statistical rule of thumb to determine an adequate sample size include the following: E. A statistical power level of 80 percent.

In Mathematics and Statistics, sampling can be defined as a process that is typically used for the collection or selection of data (physical objects, observations, or individuals) from a larger statistical population, especially by using specific procedures and processes.

In Mathematics and Statistics, a sample proportion can be defined as the proportion of individuals in a sample that have a specified characteristic or trait.

Mathematically, the sample proportion of a sample can be calculated by using this formula:

\(\hat{p} = \frac{x}{n}\)

Where:

In Mathematics and Statistics, a statistical power level of 80 percent (80%) is a statistical rule of thumb that is generally used in determining an adequate sample size.

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Explanation:

Molality is the ratio of the amount of substance of a solute (in moles – n) to the mass in kilograms of the solvent (m).

The symbol for molality is usually W and it can be calculated by the following formula:

W = n/m

here, we need to calculate n of NaCl using the formula:

n = m/MM

where MM of NaCl is 58.5 g/mol

n = 120/58.5

n = 2.05 moles

W = 2.05/30

W = 0.068 mol/Kg

Answer: A) 0.068

Answer:

Explanation:

I hope it helps you.

Answer:

B.K2(OH)2 i think that is the answer

Answer:

6000N

Explanation:

f= ma

f= 2000kg×3mls2

f=6000N

Answer:

6000 N

Explanation:

Given,

Mass= 2000 kg

Acceleration= 3 m/s²

Force= ?

Force= mass* acceleration

Force= 2000* 3 = 6000 N

Therefore, the force possessed by the car is 6000 N

It is significant to remember that the order of a reaction affects how a reaction's half-life is calculated. It is commonly expressed in seconds and is represented by the sign "t 1/2." The amount which is left after 172.8 years is 0.8 g.

The time it takes for the concentration of a particular reactant to reach 50% of its initial concentration, or the time it takes for the reactant concentration to reach half of its initial value, is known as the half-life of a chemical reaction.

To calculate the remaining amount:

N₀ / N = 2ⁿ

n = time / t1/2

172.8 / 57.6 = 3

N = 2ⁿ / N₀

N = 2³ / 10 = 0.8 g

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Answer:

49.8cm

Explanation:

hope it helps i even double checked for you :D

Answer:

_ NH4NO3 -> _ N2O + 2 H2O

Explanation:

By having 2 water molecules, we reach the 4 H atoms and 3 O atoms that are present on the left side. We don't add any other coefficients because we already have enough N atoms and we don't have to manipulate the left side at all.