Which statement best describes the relationship between observations and conclusions? A. Observations are based on Conclusions B. Conclusions aare based on observations c. Obserations and conclusions both depend on research D. Neither conclsions nor observations depend on research​

Answer:

C. gravity causing a curved path as an object tries to go straight.

1.45 is the ratio of their velocities. The typical kinetic energy (K) of a gas molecule is equal to one-half of its mass (m) multiplied by its RMS speed (vrms) square.

Average Speed and Kinetic Energy The average speed of air molecules increases as temperature as well as average kinetic energy rise.

The typical kinetic energy (K) of a gas molecule is equal to one-half of its mass (m) multiplied by its RMS speed (vrms) square.

K.E. of HCl=1/2× mass of HCL (Volume of HCI)²

K.E. NH\(_3\)=1/2× mass of NH\(_3\) (VNH\(_3\))²

1/2× mass of NH\(_3\) (VNH\(_3\))²=1/2× mass of HCL (Volume of HCI)²

mass of NH\(_3\) ×(VNH\(_3\))²=mass of HCL ×(Volume of HCI)²

17.03×(VNH\(_3\))²= 36.4×(Volume of HCI)²

(VNH\(_3\))²/ (Volume of HCI)²= 36.4/17.03

(VNH\(_3\))²/ (Volume of HCI)²= 2.13

(VNH\(_3\))/ (Volume of HCI=1.45

Therefore, 1.45 is the ratio of their velocities.

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Answer:

A

Explanation:

If Hydrogen is H₂  There will be two silver

and is Carbon is C There will only be one gray

and if Oxygen is O₃ There will be three red

1. The reaction mixture with the largest amount of product(s) when at equilibrium is the one with the largest Keq value.

2. The reaction mixture with the largest amount of reactants when at equilibrium is the one with the smallest Keq value

3. The reactions in the table that have concentrations that represent the systems at equilibrium are Reactions 1 and 3.

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or products so that the ratio represents the system at equilibrium.

1. In this case, the reaction mixture with the largest Keq value is Reaction 2. This is because the equilibrium constant, Keq, is a measure of the relative concentrations of the products and reactants at equilibrium. A large Keq value indicates that the equilibrium lies far to the right, meaning that there are more products than reactants at equilibrium.

2. The reaction mixture with the largest amount of reactants when at equilibrium is the one with the smallest Keq value. In this case, the reaction mixture with the smallest Keq value is Reaction 4. This is because a small Keq value indicates that the equilibrium lies far to the left, meaning that there are more reactants than products at equilibrium.

3. The reactions in the table that have concentrations that represent the systems at equilibrium are Reactions 1 and 3. This is because the concentrations of the products and reactants in these reactions are equal, which is the definition of equilibrium.

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or products so that the ratio represents the system at equilibrium. For example, to bring Reaction 2 to equilibrium, we could increase the concentration of H2O or decrease the concentration of CO2.

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Reaction Keq Concentrations at Equilibrium

1 1000 H2O:CO2 = 1:1

2 10 H2O:CO2 = 10:1

3 0.01 H2O:CO2 = 100:1

4 0.001 H2O:CO2 = 1000:1

On the basis of the Keq values given in the table, which reaction mixture contains the largest amount of product(s) when at equilibrium? Explain.

2. Which reaction mixture contains the largest amount of reactants when at equilibrium?

3. Which reactions in the table have concentrations that represent the systems at equilibrium?

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or

products so that the ratio represents the system at equilibrium

Answer:

Condensation

Explanation:

Zoe is quite keen to have noticed what we call condensation. Air contains many components, one of those being water vapor. Like how sugar is soluble in water, water can be said to be "soluble" in air. Water will evaporate into the air to a certain extent. The higher the temperature of the air, the more water the air can hold. If the air has more water that it can hold (potentially because of a temperature decrease), the extra water will come out of the air. Zoe's water bottle was cold, and because the air around Zoe's bottle had cooled down, the air can not hold as much water as it could when it was warm, so the air deposited the extra water in the form of liquid water onto the bottle, giving the illusion that her bottle was sweating.

Approximately 631.5 liters of dry air at 25°C and 750 torr would need to be processed to produce 150 liters of liquid \(O_2\) -183°C.

To solve this problem, we need to consider the ideal gas law and the molar volume of gases.

First, we can calculate the number of moles of oxygen in 150 L of liquid \(O_2\) at -183°C. To do this, we divide the mass of liquid oxygen by its molar mass:

Mass of liquid oxygen = volume of liquid oxygen * density of liquid oxygen = 150 L * 1.14 g/mL = 171 g

Molar mass of oxygen (O2) = 32 g/mol

Number of moles of oxygen = mass of oxygen / molar mass of oxygen = 171 g / 32 g/mol ≈ 5.34 mol

Since the mole fraction of oxygen in dry air is given as 0.21, we can calculate the total moles of dry air needed to produce 5.34 mol of oxygen:

Moles of dry air = moles of oxygen / mole fraction of oxygen = 5.34 mol / 0.21 ≈ 25.43 mol

Now, we can use the ideal gas law to calculate the volume of dry air at 25°C and 750 torr (convert to atm) that corresponds to 25.43 mol:

PV = nRT

P = 750 torr * (1 atm / 760 torr) ≈ 0.987 atm

V = volume of dry air (unknown)

n = 25.43 mol

R = 0.0821 L·atm/(mol·K)

T = 25°C + 273.15 = 298.15 K

Solving for V:

V = nRT / P = (25.43 mol)(0.0821 L·atm/(mol·K))(298.15 K) / 0.987 atm ≈ 631.5 L

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Answer:

I don't understand the question

Explanation:

what is your name

The amount of volume of KOH solution that should be added to make 500mL of a 0.300M solution is 200mL.

The volume of a solution given the concentration can be calculated using the following expression;

CaVa = CbVb

Where;

According to this question, we are to calculate how many mL of a 0.75 M OH solution that should be added to a 500 mL flask to make 500 mL of a 0.300 M KOH solution.

0.75 × Va = 500 × 0.3

0.75Va = 150

Va = 150/0.75

Va = 200mL

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The maximum mass of water that can be produced by the reaction is 43.3 g, rounded to three significant figures.

The balanced chemical equation for the reaction between butane and oxygen is:

C4H10 + 13/2 O2 → 4 CO2 + 5 H2O

From the equation, we can see that 1 mole of butane reacts with 13/2 moles of oxygen to produce 5 moles of water.

moles of butane = 34. g / 58.12 g/mol = 0.585 mol

moles of oxygen = 200. g / 32.00 g/mol = 6.25 mol

Determining the limiting reactant.

butane : oxygen = 0.585 mol : 6.25 mol

= 0.0936 : 1.00

stoichiometric ratio = 1 : 13/2

= 0.7692 : 1.00

Since the actual ratio is lower than the stoichiometric ratio for oxygen, it is the limiting reactant.

The maximum amount of water that can be produced is determined by the amount of limiting reactant (oxygen).

moles of water = 5/13 * 6.25 mol

= 2.403 mol

Finally, we can convert the moles of water to grams:

mass of water = 2.403 mol * 18.015 g/mol

= 43.3 g

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Maalox is the trade name for an antacid and antigas medication used for relief of heartburn, bloating, and acid indigestion in which

4 ml contains

= 320mg of aluminum hydroxide

= 320mg of magnesium hydroxide

= 32mg of simethicone

recommended doses = 4 times * 2 tea spoon = 8 tea spoon/ day

given = 1 tea spoon = 5 ml

8 tea spoon = 40 ml

hence,

amount of aluminum hydroxide = 320/4 * 40 = 3200mg = 3.2 g

amount of magnesium hydroxide = 320/4 * 40 = 3.2 g

amount of  simethicone = 32/4 * 40 = 320 mg = 0.32g

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Answer:

heat, electrical, mechanical, nuclear,sound

Explanation:

The power plant is mechanicalised so it produce heat which is in form of electrical and then we start hearing sound

To solve this we must be knowing each and every concept related to environment. Therefore, the correct option is option B among all the given options.

An environment may be simply defined as a system that includes all abiotic and biotic components that have an impact on human life. All flora and animals are considered biotic, or living, elements, whereas water, sunshine, air, temperature, etc. are considered abiotic.

Any good, service, or feature that benefits people and society might be considered one of an environment's resources. They might be anything that fulfills a person's requirements on a daily basis. Amount of oxygen in the water is a biotic factor of an aquarium environment.

Therefore, the correct option is option B.

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Answer: B: Water Temperature

Explanation: k12 test 1.04 Science Life semester 2

Answer:

Empirical formula of a compound means that it provides simplest ratio of whole number.

Explanation:

Mass of boron and chlorine is 9.224% and 90.74%

The products would be formed by these reactants. Because Mg is a more powerful reducing agent than  H₂, it can reduce H⁺ ions to form  H₂ gas.

Because it oxidizes magnesium to magnesium cations while being reduced, hydrochloric acid, the compound that delivers hydrogen ions to the reaction, acts as an oxidation agent.

When a reactant loses electrons during the reaction, this is referred to as oxidation. When a reactant gains electrons during the reaction, this is referred to as reduction. This is common when metals react with acid.

A half reaction is the component of a redox reaction that is either the oxidation or reduction reaction. By taking into account the change in oxidation states of the individual substances involved in the redox reaction, a half reaction is obtained.

Oxidation half-reaction: Mg(s) → Mg²⁺(aq) + 2e⁻

Reduction half-reaction: 2H⁺(aq) + 2e⁻ → H₂(g)

The balanced equation is:

Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)

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Answer:

read a lot and understand what you read

do practicals

Answer:

MgBr2

Explanation:

On the periodic table, Magnesium has 2+ charge and Bromine has -1 charge.

You cross charges and get MgBr2

Magnesium and bromine react to produce magnesium bromide. The balanced chemical equation for this reaction is Mg + Br\(_2\) \(\rightarrow\)  MgBr\(_2\).

An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, both side of the reaction have an equal balance of mass and charge.

This is accomplished by altering the compounds' coefficients.  In this example, the subscripts (tiny numbers towards the outside of some elements, including iron and oxygen) are never altered. Magnesium and bromine react to produce magnesium bromide. The balanced chemical equation for this reaction is Mg + Br\(_2\) \(\rightarrow\)  MgBr\(_2\).

Therefore, the balanced chemical equation for this reaction is Mg + Br\(_2\) \(\rightarrow\)  MgBr\(_2\).

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To calculate the molarity of the solution, we need to know the number of moles of BaI2 and the volume of the solution in liters.

First, let's calculate the number of moles of BaI2. We can use the formula:

Number of moles = Mass (in grams) / Molar mass

The molar mass of BaI2 can be calculated as follows:

Ba: atomic mass = 137.33 g/mol

I: atomic mass = 126.90 g/mol

2 x I = 2 x 126.90 g/mol = 253.80 g/mol

Total molar mass of BaI2 = 137.33 g/mol + 253.80 g/mol = 391.13 g/mol

Number of moles of BaI2 = 413 g / 391.13 g/mol ≈ 1.056 moles

Next, we need to convert the volume of the solution from milliliters to liters:

Volume of solution = 750 ml / 1000 = 0.75 L

Finally, we can calculate the molarity using the formula:

Molarity = Number of moles / Volume of solution

Molarity = 1.056 moles / 0.75 L ≈ 1.408 M

Therefore, the molarity of the BaI2 solution is approximately 1.408 M.

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Answer:

3 years

Explanation:

(50*0.3)x>=100

Answer:

Lamps and televisions

Explanation:

I think those qualify.

9514 1404 393

Answer:

  every electrical item

Explanation:

Every user of electricity, including lights, heaters, stoves, cell phones, computers, refrigerators, and on and on, will turn electrical energy into some sort of electromagnetic radiation.

The radiant energy we're usually wanting is energy in the form of heat or light (or radio communication).

We purchase wi-fi products, space heaters, and light bulbs specifically because of the kind of radiant energy they produce. For most other electrical products, the production of radiant energy is incidental to the purpose for their use, and not the main purpose.

Answer:

The percent composition of Iron (II) Phosphate is

Fe = 46.866%

P = 17.330%

O = 35.806%

The percent composition of compounds is obtained form the mass of atoms in the compounds.

The formula of Iron (II) Phosphate is Fe3(PO4)2. We now have to obtain the molar mass of the compound as follows;

Molar mass = 3(56) + 2[31 + 4(16)] = 168 + 190 = 358 g/mol

Percentage of iron =  3(56)/358 × 100/1 = 46.9%

Percentage of phosphorus = 2(3)1/358 × 100/1 = 17.3%

Percentage of oxygen = 8(16)/358  × 100/1 =  35.8 %

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Answer:So, when a reactant gets used up, its concentration decreases, and so the total reaction rate decreases. As you can see here, more products equal less reagents (reactants), and so the reaction rate decreases.

Explanation: i hope this helps!! :)))

The ideal gas law equation is: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

To determine the mass of NaCl that reacted with F2 at 290 K and 1.5 atm, we can rearrange the equation as follows: n = PV/RT. Substituting in the values for P, V, R, and T, we get: n = (1.5 atm)(18.0 L)/(0.0821 atm*L/mol*K)(290 K) = 0.835 mol NaCl.

To determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP (standard temperature and pressure), we would use the same equation but with the values for P, V, R, and T corresponding to STP. At STP, P = 0.987 atm, V = 18 L, R = 0.0821 atm*L/mol*K, and T = 273 K. Therefore, n = (0.987 atm)(18 L)/(0.0821 atm*L/mol*K)(273 K) = 0.792 mol NaCl.

What is Sodium chloride?

Sodium chloride, also known as table salt, is an ionic compound composed of sodium and chloride ions in equal proportions. It is a mineral found naturally in most bodies of water, including sea water, and is widely used as a seasoning and preservative in food.

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Answer:

The ideal gas law equation is: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

To determine the mass of NaCl that reacted with F2 at 290 K and 1.5 atm, we can rearrange the equation as follows: n = PV/RT. Substituting in the values for P, V, R, and T, we get: n = (1.5 atm)(18.0 L)/(0.0821 atm*L/mol*K)(290 K) = 0.835 mol NaCl.

To determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP (standard temperature and pressure), we would use the same equation but with the values for P, V, R, and T corresponding to STP. At STP, P = 0.987 atm, V = 18 L, R = 0.0821 atm*L/mol*K, and T = 273 K. Therefore, n = (0.987 atm)(18 L)/(0.0821 atm*L/mol*K)(273 K) = 0.792 mol NaCl.

Explanation:

Expression of balanced Chemical reaction :

6 HCL (aq) + CrO3 (aq) —------> CrCl3 (aq) + 3 H2O (l) + 3 Cl (g)

What are chemical reactions?

A chemical reaction is a process in which substances (reactants) react and rearrange to form a new substance (product) with different chemical properties.

What are reactants?

Reactants are substances that participate in a chemical reaction and get converted into a new

substance (product) which have different chemical properties.

What are products?

Products are substances that are produced as a result of chemical rearrangement of reactants to produce substances with different chemical properties.

What are chemical properties?

The unique properties of substances that can only be observed while a substance undergoes a chemical reaction are known as Chemical properties. Some chemical properties are: Toxicity, Coordination number, Flammability, Enthalpy of formation, Heat of combustion, Oxidation states, chemical stability etc.

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Answer:

You would see whatever liquid you added slowly disappearing

Explanation:

Hope this helps:)........if not then sorry for wasting your time and may God bless you:)

Answer:

If you take a clear cup of water and put a camera to watch it, If you time lapsed it, you would see the water slowly evaporate.

Explanation:

Hope this helped :)

Answer:  **

H-N-H

   |

  H

Explanation:

Look at a periodic table to determine how many electrons you need to account for. Hydrogen (H) only has 1 electron, while Nitrogen (N) has 5. We have three Hydrogen atoms and one Nitrogen atom, so the total number of electrons will be 3 * 1 + 5 = 8 e-.

Now, place the center atom, which will be Nitrogen and place the three Hydrogens on three sides of it as above in the answer. You should use single bonds for this. Each single bond is a pair of electrons, so since we have three single bonds so far, we have accounted for 2 * 3 = 6 electrons. However, we need 2 more electrons for the total of 8. We put these electrons in as a lone pair above Nitrogen.

We check to see if everything follows the octet rule: Nitrogen has three single bonds, so that's 6 e-, as well as one lone pair, so that's another 2 e- for a total of 8 e-. Check. Now look at Hydrogen: H is the only element whose full orbital is 2 e-. Each H has a single bond with Nitrogen, so each does have 2 e-.

Thus, we know this is the correct diagram, and we are done.

Explanation:

A bond line structure of a compound has H N H in linear plane and a hydrogen is branching upward, and the compound is H N (H) H. The nitrogen has two dots at its bottom represents a lone pair of electrons. So ,the correct answer is option C.

The correct Lewis structure for ammonia (\(NH_3\)) is option C. It shows a bond line structure with three hydrogen atoms (H) bonded to a central nitrogen atom (N) in a linear plane.

One hydrogen atom branches upward from the plane. Additionally, the nitrogen atom in this structure has two dots at its bottom, indicating a lone pair of electrons. This arrangement follows the octet rule, as nitrogen has formed three covalent bonds with hydrogen, completing its valence shell. The lone pair on nitrogen gives ammonia its characteristic properties.

Thus, option C accurately represents the Lewis structure of ammonia, showing the bonding and lone pair arrangement of its atoms.

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A hurricane is a type of severe cyclone formed when winds rotate as the pressure between low and high-pressure areas increases.

A cyclone is a violent storm that occurs when cyclone winds exceeds a speed of 74 miles (119 kilometers) per hour.

Hurricanes are classified according to their strength and catastrophic potential on a scale ranging from 1 to 5 (more violent).

In conclusion, a hurricane is a cyclone formed when a it rotates as the low and high-pressure areas increases.

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The final temperature of the water is 75.6∘C.

Condensation is the process by which steam is  converted to water at the boiling point of water. Heat lost by steam = Heat gained by water.

Heat lost by steam= ( 0.534 g × 2.03 × (104 - 100)) + (0.534 g × 40.7 × 10^3 / 18) = 4.34 + 1207.4 = 1211.74 J

Heat gained by water = ( 4.86  × 4.18 × (T2 - 15.9 ∘C))

1211.74  = 20.3T2 - 322.77

1211.74 + 322.77 = 20.3T2

T2 = 1211.74 + 322.77/20.3

T2 = 75.6∘C

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