From a laboratory process designed to separate water into hydrogen and oxygen gas, a student
collected 10.0 g of hydrogen and 79.4 g of oxygen. How much water was originally involved in the
process?

One kilogram over 1000 grams is the valid conversion factor. So the correct option is D.

Unit conversion is the expression of the same feature in a different unit of measurement. Time, for example, can be stated in minutes rather than hours, and distance can be translated from miles to kilometers, feet, or any other length measurement.

Measurements are frequently stated in one set of units, such as feet, but need alternative units, such as chains. A conversion factor is a numerical equation that allows for the equal exchange of feet and chains.

The AA conversion factor is a number that is used to multiply or divide one set of units into another. When converting to an equivalent value, the proper conversion factor must be utilized. To convert inches to feet, for example, the suitable conversion value is 12 inches equal to 1 foot. The suitable conversion value for minutes to hours is 60 minutes = 1 hour.

Therefore, the correct option is D.

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Answer:

one kilogram over 1,000 grams

Explanation:

I got it right on the test.

Answer:

a. H3PO4 + 3KOH => K3PO4 + 3H2O

b. 1.67 moles

c. KOH is the limiting agent

Explanation:

H3PO4 + 3KOH => K3PO4 + 3H2O

a = 3, b = 1, c = 1, d = 3

1 mole of H3PO4 will react with 3 moles of KOH

=> 2 moles of H3PO4 will react with 6 moles of KOH

since there are only 5 moles of KOH available, KOH is the limiting agent

Since there are only 5 moles of KOH available, the amount of H3PO4 needed is (5 x 1)/3 = 5/3 = 1.67 moles

1 mole of H3PO4 will produce 1 mole of K3PO4 => 1.67 moles of H3PO4 will produce 1.67 moles of K3PO4

Hope this helps

Answer:

The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow.

Explanation:

Explanation:

It is understood that water cycle is also a continuous cycle because it is the continuous movement of water from the earth’s surface to the atmosphere and then back to the ground. It is a continuous process. Hence, it does not have a starting or an ending point.

The balloon's new volume is 24.6L. An arctic weather balloon being inflated using 24.6 litres of helium gas in a prep shed. The shed is seven degrees Celsius inside.

When the balloon is hauled outside, it is seven degrees Celsius outside. Any three-dimensional solid's volume is equal to how much room it occupies. One of these solids can be a cube, a cuboid, a cone, a cylinder, or a sphere. Chemical compounds are composed of a large number of comparable molecules (or molecular entities), which are composed of atoms from various elements bonded together by chemical bonds. Because of this, a molecule composed of atoms from a single element is not a compound.

v1/t1 = v2/t2

24.6/7 = v2/7

v2 = 24.6L

v1 = v2

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It is untrue to make the second claim. Contrary to popular belief, alloys are not always superior electrical conductors than the individual metals that comprise them. Electrical conductivity is quite good in alloys.

Metal is used to construct a multitude of products due to its strength and durability. These are used to make things like autos, satellites, and kitchenware. Although the majority of metals are hard, some are not. At room temperature, mercury is a liquid metal, as opposed to sodium and potassium, which can be cut with a knife. The definition of an alloy states that it is a substance produced by mixing two or more metals. Alloys can also be produced using combinations of metal and other elements.

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Chemical weathering is an example of Airborne oxygen reacts with the iron content of rocks, causing them to change color.

Chemical weathering is a process in which things disintegrate due to chemical reactions, mostly with water and compounds dissolved in it, rather than mechanical processes.

A) Freezing water widens fissures in rocks is a physical phenomenon in which water stuck inside crevices in rocks expands when frozen at lower temperatures. In this method, no chemical changes are seen.

B) Plant roots force their way into cracks in rocks and finally shatter them. This is a physical process in which plant roots search for water and nutrients in fissures in rocks and eventually break them. There are no chemical changes visible here.

C) Oxygen in the air reacts with iron content in rocks, causing them to change color; as we can see, the color of rocks is changing as a result of a chemical reaction between oxygen in the air and iron content in the rocks. This process is also characterized by rock disintegration. As a result, this is referred to as chemical weathering.

D) Strong winds physically peel soft rock away, leaving harder rock behind There is no visible chemical change.

As a result, the correct solution is Option C), which provides completely adequate modifications to be classified as chemical weathering.

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Answer:

1.3 M

Explanation:

The formula mass of lithium fluoride is 7+19=26 g/mol. This means that in 52 grams of LiF, there is 2 moles.

Molarity = (moles of solute)/(liters of solution), so the answer is 2/1.5 = 1.3 M

Alkanes are saturated hydrocarbons that have single bonds in chains

General formula for alkanes :

\(\tt \large{\bold{C_nH_{2n+2}}\)

Hydrocarbon combustion reactions (specifically alkanes)

\(\large {\box {\bold{C_nH _ (_2_n _ + _ 2_) + \dfrac {3n + 1} {2} O_2 \Rightarrow nCO_2 + (n + 1) H_2O}}}\)

So that the burning of ethane with air (oxygen):

\(\tt C_2H_6+\dfrac{7}{2}O_2\rightarrow 2CO_2+3H_2O\)

2C₂H₆ (g) + 7O₂ (g) ⟶ 4CO₂ (g) + 6H₂O (ℓ)

or we can use mathematical equations to solve equilibrium chemical equations by giving the coefficients for each compound involved in the reaction

C₂H₆ (g) + aO₂ (g) ⟶ bCO₂ (g) + cH₂O (ℓ)

C : left 2, right b ⇒ b=2

H: left 6, right 2c⇒ 2c=6⇒ c= 3

O : left 2a, right 2b+c⇒ 2a=2b+c⇒2a=2.2+3⇒2a=7⇒a=7/2

Answer: A

1.68 N

Explanation:

F = ma = 0.024(70.0) = 1.68 N

0.540M

Explanation:

The concentration of lithium ions in a 0.270 M Li₂SO₄ solution can be calculated as follows:

1. Determine the ratio of lithium ions (Li⁺) to the whole Li₂SO₄ formula unit. In Li₂SO₄, there are 2 Li⁺ ions for every 1 formula unit of Li₂SO₄.

2. Multiply the given concentration of Li₂SO₄ (0.270 M) by the ratio of Li⁺ ions to the formula unit (2:1).

0.270 M Li₂SO₄ × (2 Li⁺ ions / 1 Li₂SO₄ formula unit) = 0.540 M Li⁺ ions

So, the concentration of lithium ions in a 0.270 M Li₂SO₄ solution is 0.540 M.

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Answer:Argon is an element on the periodic table. It is a member of the noble gasses, meaning that it is a monoatomic pure gas. In other words, argon gas particles are simply pure single atoms of argon. ... Finally, water is a polyatomic molecule H2O composed of two atoms of hydrogen and one atom of oxygen.

Explanation:

Hence option C is the correct option.

Therefore, the formula of the hydrate is MgCO3•0.449H2O.

The formula of the hydrate can be determined by calculating the number of moles of water driven off during the heating process and then using this information to determine the formula of the hydrate.

First, calculate the number of moles of water driven off:

15.67 g - 7.58 g = 8.09 g

Next, convert the mass of water driven off to moles:

8.09 g / (18.015 g/mol) = 0.449 mol

Finally, use the number of moles of water driven off to determine the formula of the hydrate:

(0.449 mol H2O) / (1 mol MgCO3•xH2O) = x

x = 0.449

So, the formula of the hydrate is MgCO3•0.449H2O.

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\( \sf = \frac{125}{5} = 25\)

Answer:

The velocity of the car is 25 Km/hour to the south.

Hope you could get an idea from here.

Doubt clarification - use comment section.

His blood volume will increase and its osmolarity will decrease after administering 5 liters of 300moS fluid.

Osmoles of solute per liter of solution serve as a quantitative unit for expressing the concentration of osmotically active particles in solution, or osmolarity. The term "osmolality" refers to the quantity of solute particles per liter of solution, and it is commonly stated in terms of osmoles per liter (Osm/L) or milliosmoles per liter (mOsm/L).

The direction of fluid transport within an organism can be determined by the plasma osmolality and oncotic pressure, therefore it's critical to have emergency care on hand in case it's required during labor and after delivery. Insufficient blood flow to bodily organs causes postpartum hemorrhage (PPH), which can result in shock and death.

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Answer:

physical

Explanation:

The best way for an elementary school teacher to use an interactive simulation showing drawn molecules in a phase change from a liquid to a gas is to emphasizing that the molecules are still there, but they are now in a different phase.

The teacher can explain that when a liquid is heated, the molecules gain energy and move faster, eventually becoming a gas. The interactive simulation can show the molecules moving faster and farther apart as they transition from a liquid to a gas. By emphasizing that the molecules are still present, even though they are now in a different phase, students will better understand the concept of phase changes and that matter can exist in different phases (solid, liquid, and gas) depending on the amount of energy it possesses.

an elementary school teacher can follow these steps: 1. Begin with a clear representation of liquid molecules, showing them closely packed together but with some movement. 2. Gradually increase the kinetic energy of the molecules, simulating the effect of heating the liquid. 3. As the energy increases, show the molecules moving faster and spreading apart, transitioning into the gas phase. 4. Emphasize that the liquid is not disappearing, but rather changing into a different state with more space between molecules. 5. Allow students to interact with the simulation by adjusting temperature or pressure, observing how these factors influence the phase change.

Forces of attraction dictate that a material's intermolecular forces of attraction are stronger in a substance with a higher melting point than they are in a substance with a lower melting point.

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Answer:

they both move at a different force... believe I'm right

Explanation:

Answer:

The moon

Explanation:

Force? I think

Answer:

Solid = rocks or other hard stuff

Liquid = water or mild or other stuff likt that

Answer:Ice is an example of a solid. A liquid has a defined volume, but can change its shape. Water is an example of a liquid. A gas lacks either a defined shape or volume.

...

Examples of gases include:

Air.

Natural gas.

Hydrogen.

Carbon dioxide.

Water vapor.

Freon.

Ozone.

Nitrogen.

Explanation:

Takealot excels at providing convenience, extensive product selection, competitive pricing, and a seamless online shopping experience as its value proposition for consumers.

Convenience is a key aspect of Takealot's value proposition. As an online retailer, Takealot offers the convenience of 24/7 shopping from the comfort of one's own home.

Customers can browse a wide range of products, place orders, and have them delivered directly to their doorstep.

Takealot also offers an extensive product selection, spanning various categories such as electronics, fashion, home goods, and more.

This breadth of choices allows consumers to find and compare different products all in one place, saving them time and effort compared to traditional retailers with limited inventory.

Competitive pricing is another area where Takealot excels. By operating online, the company has lower overhead costs compared to brick-and-mortar retailers, enabling them to offer competitive prices and discounts to their customers.

The seamless online shopping experience provided by Takealot includes user-friendly interfaces, secure payment options, and efficient delivery services. This enhances customer satisfaction and convenience.

In contrast, traditional non-online retailers typically have limited operating hours, smaller product selections, and may not offer the same level of convenience and competitive pricing.

They often require customers to physically visit their stores, which can be time-consuming and may not provide the same level of ease and accessibility as online platforms like Takealot.

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The minimum pressure of ideal gas is 135.36 psi.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

V₁ = 250 mL = 0.25 L

V₂ = 2.5 L

P₂ = 700 torr

When the initial and final temperature is the same, we can use the ratio of pressure and volume as

P₁ . V₁ = P₂ . V₂

P₁ . 0.25 = 700 . 2.5

P₁ = 7000 torr

convert to psi

P₁ = 7000 torr

P₁ = 7000 / 51.715 psi

P₁ = 135.36 psi

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Increasing the volume of the solution decreases the concentration of the hydrogen ions which subsequently increases the pH;  hence, increasing volume will increase the pH.

Higher is the concentration of H plus ions, more acidic is the solution and  lower the concentration of H plus ions, the less acidic is the solution. Basic strength of a solution depends on the concentration of OH minus ions.

When an acid and alkali react together, they produce salt and water. Acid + alkali → salt + water . As you know, water is neutral, so the acid alkali come together to neutralize each other to make pH 7.

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Based on the products formed when they react with water, the following is true:

AlCl₃ - Acidic.

NaBr - Neutral.

NaClO - Acidic.

3CH₃NH₃NO₃ - Acidic.

Na₂SO₃ - Basic.

A chemical compound is a substance made of numerous identical molecules joined by chemical bonds and containing atoms from various chemical elements. Therefore, a molecule composed entirely of one element's atoms is not a compound.

Here,

given set of solution:

(a) AlCl3

(b) NaBr

(c) NaClO

(d) 3CH3NH34NO3

(e) Na2SO3

AlCl3 produces hydrochloric acid, a potent acid, when it reacts with water. The mixture is going to be acidic.

When NaBr reacts with water, it creates Sodium Hydroxide, a powerful base, and Hydrobromic acid, a powerful acid. They will balance each other out because they are both powerful, leaving a neutral result.

Sodium Hydroxide, a weak acid and a strong base, are the products of NaClO. The solution will be simple.

Nitric Acid, a strong acid, and a weak base will be produced by 3CH3NH3NO3, making the solution acidic.

Na2SO3 would generate Sodium Hydroxide, a strong base, and a weak acid, making the solution basic.

The following is true based on the products formed when they react with water:

Acidic AlCl3.

NaBr is a neutral compound.

NaClO is an acidic compound.

3CH3NH3NO3 is an acidic compound.

Na2SO3 is a basic.

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Hence, the probability that the first spin lands on blue and the second spin lands on gray is 1/5.

The probability, we need to consider each spin separately and then multiply the probabilities together.

The probability of the first spin landing on blue is 4 out of 5, since there are 4 blue sections out of a total of 5 sections.

After the first spin, there are 4 sections left, out of which only 1 is gray. The probability of the second spin landing on gray is 1 out of 4.

To find the probability of both events happening, we multiply the probabilities together: (4/5) * (1/4) = 4/20 = 1/5.

Hence, the probability that the first spin lands on blue and the second spin lands on gray is 1/5.

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Answer:

\(\% O=24.6\%\)

Explanation:

Hello!

In this case, since the by-mass percent of an element in a compound is computed by taking into account its atomic mass, the number of atoms in the molecules and the molar mass of the compound, we can write:

\(\% O=\frac{2*16.00}{130.18 } *100\%\\\\\% O=24.6\%\)

Best regards!

Answer:

Expiremental group for -first one.    Second one-2

Explanation:

I Had Those QuestIons On mY tEsttt!!

Answer:This is a Flint lighter, It's usually used to make sparks to light things like burners in chemistry.

Explanation:

Answer:

18

Explanation:

4 moles of ammonia molecules can be made when 6 grams of hydrogen gas reacts with excess nitrogen.

\(N_{2}\)(g) + 3\(H_{2}\)(g) → \(2NH_{3}\)(g)

1 mole of \(N_{2}\) reacts with 3 moles of \(H_{2}\)

Therefore, 6 moles of \(N_{2}\) will react with 18 moles of \(H_{2}\)

\(H_{2}\) + 6 no. of moles. ( Hydrogen is a limiting reagent).

No. of moles of ammonia are formed when 3 moles of \(H_{2}\) will react with excess of \(N_{2}\) = 2

No. of moles of ammonia are formed when 6 moles of \(H_{2}\) will react with excess of \(N_{2}\) = 2/3×6 = 4

Therefore, it is a gaseous equation (all the reactants as well as products are gases).

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