Which type of redox reaction leads to each of the following?
(b) A decrease in the number of substances

The approximate speed of the satellite, expressed to the correct number of significant figures, is approximately 7.6 km/s.

The correct answer is B. 7.6 km/s.

To convert the speed of the satellite from miles per hour to kilometers per second, we need to use the conversion factors provided.

Given:

Speed of the satellite = 17,000 miles/hour

One kilometer = 0.62 mile

One hour = 3,600 seconds

To convert miles to kilometers, we can use the conversion factor:

1 mile = 1.60934 kilometers

To convert hours to seconds, we can use the conversion factor:

1 hour = 3,600 seconds

Now, let's calculate the speed of the satellite in kilometers per second:

Speed in kilometers per hour = 17,000 miles/hour * 1.60934 kilometers/mile = 27,358.78 kilometers/hour

Speed in kilometers per second = (27,358.78 kilometers/hour) / 3,600 seconds/hour ≈ 7.6 kilometers/second

Therefore, the approximate speed of the satellite, expressed to the correct number of significant figures, is approximately 7.6 km/s.

The correct answer is B. 7.6 km/s.

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The patterns of water use in the USA vary based on different factors such as the geography, climate, and the type of usage

Water usage can cause various problems if not managed properly such as pollution and scarcity.

Some areas in the US have abundant sources of water while others are water-scarce.

Agriculture is the largest water user in the US, followed by municipal and industrial uses. Irrigation is the main water usage in agricultural areas, while urban areas tend to use water for drinking, bathing, and other household purposes.

Excessive water usage can also lead to water scarcity, water pollution, and other environmental problems. Additionally, water usage conflicts can arise between different regions, states, and even countries. Therefore

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The chemical has a percent composition of 56.35% oxygen and 43.65% phosphorus.

A substance has an oxygen content of 88.79% and a hydrogen content of 11.19%. Calculate this compound's empirical formula. Nonetheless, it's customary to employ the atom ratio with the smallest whole number. H 2 O is the compound's empirical formula as a result.

P mass of 30.98 g and O mass of 40.00 g add up to 70.98 g.

Phosphorus: \((30.98 g / 70.98 g) x 100% = 43.65%\)

\((40 g/70.98 g) x 100% = 56.35% for oxygen.\)

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Answer:

When two or more atoms chemically bond together, they form a molecule. The bonds between the two hydrogen atoms and the oxygen atom in a molecule of water are covalent bonds.

Explanation:

Answer:

Option D. Decomposition reaction

Explanation:

MgBr₂ (s) —> Mg (s) + Br₂ (l)

To know which option is correct. It is important that we have an understanding of what each option means.

1. Synthesis reaction: This is a type of reaction in which two different elements react to produce a new compound different from the two elements that reacted. e.g

A + D —> AD

2. Combustion reaction: This is a reaction which involves a compound and oxygen to produce carbon dioxide (CO₂) and water (H₂O) e.g methane (CH₄) undergoes combustion reaction as follow:

CH₄+ 2O₂ —> CO₂ + 2H₂O

3. Single Replacement reaction: This is a reaction in which one element replaces or displaces another element in a single compound. This is illustrated below:

X + WZ —> XZ + W

We can see that the X replaces W in the reaction.

4. Decomposition reaction: This is a type of reaction in which a compound decompose or breaks into two or more simple compounds or elements e.g

ZX₄ —> Z + 4X

From the above illustrations, we can conclude that the the reaction:

MgBr₂ (s) —> Mg (s) + Br₂ (l)

Is a decomposition reaction because MgBr₂ breakdown into Mg and Br₂

A molecule having four total electron groups around the central atom has three bonding electron groups and one nonbonding electron group. Its molecular structure is trigonal pyramidal.

One or more atoms are joined by covalent (chemical) bonds to form molecules. Atoms can be represented as circles with a nucleus at their center (consisting of protons and neutrons) and one or more concentric circles around them, which represent the "shells" or "levels" in which the electrons surrounding the atom's nucleus are located, along with markings indicating the electron at each level. The lowest unit into which a substance can be divided while still being the same substance is a molecule. It is composed of two or more atoms that are chemically bonded to one another.

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The words to complete the sentence are :

1)  he Absorbent material

2) The Plastic bag

3) The solid waste container

4) The Detergent and the water

The complete sentences in the spill cleanup are :

1) The step in liquid spill cleanup.

Surround the area with "Absorbent material", then cover the spill.

2) The step in liquid spill cleanup.

Scoop up the material and place in a "plastic bag".

3) The step in liquid spill cleanup.

Place the bagged waste in a "solid waste container".

4) The step in liquid spill cleanup.

Wipe down the area with "detergent and the water".

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Answer:

Explanation:

Ok so the first one would be Electrical energy and Radiated energy

Then the 2 question it would be not electrical but the other 3 for the 3 question it would be it would be Electrical and the radiated energy

And for the last one it would be the last 3

Given what we know about elements of the periodic table and their properties, we can confirm that the list with elements that have very similar properties is option B.

Therefore, we can confirm that since option B is the choice that lists all elements pertaining to the same group, in this case, the Alkaline-earth metals, it is the correct option as they will all have very similar properties.

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Answer:

Sample response: Leaf-cutter ants gather pieces of leaves and store them in their nests to provide raw materials and food for the fungus that grows on the leaf pieces. The ants feed on the fungus, so by collecting leaves the ants are effectively able to grow their own food supply.

Explanation:

Answer:

Leaf-cutter ants gather pieces of leaves and store them in their nests to provide raw materials and food for the fungus that grows on the leaf pieces. The ants feed on the fungus, so by collecting leaves the ants are effectively able to grow their own food supply.

Explanation:

edg 2020

Answer:

\(\boxed {\boxed {\sf About \ 37.1 \ grams \ of \ iodine }}\)

Explanation:

To convert from atoms to grams, you must first convert atoms to moles, then moles to grams.

1. Convert Atoms to Moles

To convert atoms to grams, Avogadro's number must be used.

\(6.022*10^{23}\)

This number tells us the number of particles (atoms, molecules, ions, etc.) in 1 mole. In this case, the particles are atoms of iodine.

\(\frac{6.022*10^{23} \ atoms \ I }{1 \ mol \ I}\)

Multiply the given number of atoms by Avogadro's number.

\(1.76*10^{23} \ atoms \ I*\frac{6.022*10^{23} \ atoms \ I }{1 \ mol \ I}\)

Flip the fraction so the atoms of iodine will cancel out.

\(1.76*10^{23} \ atoms \ I*\frac{ 1 \ mol \ I}{6.022*10^{23} \ atoms \ I}\)

\(1.76*10^{23}* \frac{1 \ mol \ I}{6.022*10^{23} }\)

Multiply so the problem condenses into 1 fraction.

\(\frac{1.76*10^{23} \ mol \ I}{6.022*10^{23} }\)

\(0.2922617071 \ mol \ I\)

2. Convert Moles to Grams

Now we must use the molar mass of iodine, which is found on the Periodic Table.

Use this mass as a fraction.

\(\frac{ 126.9045 \ g\ I }{ 1 \ mol \ I}\)

Multiply this fraction by the number of moles found above.

\(0.2922617071 \ mol \ I*\frac{ 126.9045 \ g\ I }{ 1 \ mol \ I}\)

Multiply. The moles of iodine will cancel.

\(0.2922617071 *\frac{ 126.9045 \ g\ I }{ 1 }\)

The 1 as a denominator is insignificant.

\(0.2922617071 *{ 126.9045 \ g\ I }\)

\(37.08932581 \ g \ I\)

3. Round

The original measurement of 1.76*10^23 has 3 significant figures (1, 7, and 6). Therefore we must round our answer to 3 sig figs. For this answer, that is the tenths place.

\(37.08932581 \ g \ I\)

The 8 in the hundredth place tells us to round the 0 up to a 1.

\(\approx 37.1\ g \ I\)

There is about 37.1 grams of iodine in 1.76*10^23 atoms.

Answer:

They´re pretty reactive whit wather forming hidroxydes, they have the same metal brigthness as well the same electrons valence

Explanation:

This can be for the ubications of the protons to the nucleoid of athom

1) Convert grams to moles

The molar mass of Cu is 63.546 g/mol.

0.007553 mol of Cu is equal to 7.6*10^-3 mol of Cu.

.

Explanation:

group 1 elements reacts with oxygen

Overall, cathodic protection by zinc sacrificial anodes is an effective method of protecting metal structures in the marine environment from corrosion. While it may result in some increase in zinc and other metal concentrations in marine sediment, the impact is generally minimal and not harmful.

The anodes corrode preferentially to the metal they are protecting, thereby preventing corrosion of the protected metal. However, this process can also result in the release of zinc ions into the surrounding environment, including marine sediment. Cathodic protection by zinc sacrificial anodes is a common method of protecting metal structures in the marine environment from corrosion.

The impact of zinc sacrificial anodes on marine sediment metallic contamination has been studied in several research papers. One such study, titled "Impact of cathodic protection with zinc sacrificial anodes on metallic contamination in marine sediment" by M. Pérez-López et al. (2014), investigated the effects of cathodic protection using zinc anodes on the concentration of metals in marine sediment.

The study found that the use of zinc anodes did result in an increase in zinc concentration in the marine sediment, as well as a slight increase in copper concentration. However, the increase was not significant enough to cause any adverse effects on the marine environment or human health.

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The sample of gas containing 775 moles of smokestack gas would contain approximately 4.67 × 10²⁵ molecules of SO₂.

To calculate the number of molecules of SO₂ in the given sample of gas, we need to use Avogadro's number, which is approximately 6.022 × 10²³ molecules/mol.

Given that the sample contains 775 moles of smokestack gas, we can multiply this value by Avogadro's number to find the total number of molecules:

Number of molecules = 775 mol × (6.022 × 10²³ molecules/mol) ≈ 4.67 × 10²⁵ molecules

1. To calculate the number of molecules of SO₂, we need to know the number of moles of smokestack gas in the sample.

2. The given information states that the sample contains 775 moles of smokestack gas.

3. Avogadro's number is a fundamental constant in chemistry that relates the number of particles (molecules or atoms) to the number of moles. It is approximately 6.022 × 10²³ molecules/mol.

4. By multiplying the number of moles by Avogadro's number, we can determine the total number of molecules in the sample.

5. Therefore, multiplying 775 moles by Avogadro's number gives us approximately 4.67 × 10²⁵ molecules of SO₂ in the sample.

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Answer:

none of the above

Explanation:

Answer:

A. 1:1

Explanation:

The ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound is 1:1 because sodium needs to lose one electron and bromine needs one electron to become stable and complete its outermost shell. When sodium lose electron, it become cation and gain +1 charge while on the other hand, the bromine accept one electron and become anion and gain -1 charge so that's why we can say that there is 1:1 of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound.

Acid protonates the hydroxyl group and conjugate base deprotonates the beta carbon or adjacent carbon, which leads to formation of a pi bond between the alpha and beta carbon.

What is an acid?

A Brnsted-Lowry acid or Lewis acid is a molecule or ion that may either donate a proton (the hydrogen ion, H+) or establish a covalent bond with an electron pair. Proton donors, also known as Brnsted-Lowry acids, are the first class of acids. Proton donors, sometimes referred to as Arrhenius acids, generate the hydronium ion H3O+ under the unique situation of aqueous solutions. The Arrhenius hypothesis was expanded upon by Brnsted and Lowry to take non-aqueous solvents into account. A hydrogen atom is often bound to a chemical structure in a Brnsted or Arrhenius acid that is still energetically advantageous after the loss of H+.

Acid protonates the hydroxyl group and conjugate base deprotonates the beta carbon or adjacent carbon, which leads to formation of a pi bond between the alpha and beta carbon.

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Answer:

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.

Explanation:

Answer:  The answer is B. Plasma, Gas, Liquid.

In a solid, particles are tightly packed and lined up in a specific pattern, like little soldiers. In a liquid, particles are still close together but are not arranged in a specific pattern. In a gas, particles are far apart and move freely, and there is no specific arrangement or pattern. In a plasma, particles are highly ionized and do not have a specific arrangement or pattern either. Therefore, the states of matter that contain particles that are not tightly packed and lined up like little soldiers are plasma, gas, and liquid.

Explanation:

When calcium reacts with chlorine, the reaction involves: a transfer of electrons from Ca to Cl. The correct option is (a).

In the reaction between calcium (Ca) and chlorine (Cl), the electrons are transferred from calcium to chlorine. This is indicated by the formation of calcium ions (Ca²⁺) and chloride ions (Cl⁻).

Calcium has two valence electrons in its outer shell, and chlorine has seven valence electrons. Calcium tends to lose its two electrons to achieve a stable configuration, while chlorine tends to gain one electron to achieve a stable configuration of eight valence electrons.

As a result, calcium loses two electrons, which are gained by chlorine. This transfer of electrons leads to the formation of calcium ions with a +2 charge and chloride ions with a -1 charge.

The option "a. a transfer of electrons from Ca to Cl" correctly describes the electron transfer that occurs during the reaction between calcium and chlorine.

This type of reaction, involving the transfer of electrons, is known as an ionic reaction and is characteristic of the formation of ionic compounds.

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Answer:

4560 torr

Explanation:

PV = K

4 x 1.5 = k

k = 6

V = k / p

V = 6 / 1

V = 6

atm to torr = 1 to 760

760 x 6 = 4560

Answer:

4560 Torr

Explanation:

Boyle's Law

\(\sf P_1 \cdot V_1=P_2 \cdot V_2\)

where:

Given:

Substituting the given values into the formula:

\(\implies \sf 1.5 \cdot 4=P_2 \cdot 1\)

\(\implies \sf P_2=6\:atm\)

To convert atm to Torr, multiply atm by 760:

\(\implies \sf P_2=6\cdot 760=4560\:Torr\)

If you apply unbalanced forces to an object, It will change position; option A.

Forces are agents which cause a change in the position or state of an object.

According to Newton's third law of motion, for every action, there is an equal but oppositely-directed force.

The movement or change in position of object is due to applied forces.

When there are unbalanced forces, the object on which the force is acting on will tend to change position in the direction of the unbalanced force.

In conclusion, forces cause changes in position and state of objects.

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Answer:

You would swim 200 time's.

Hope this help's :)

An Olympic swimming pool is 50 meters long. You swim from one end to the other four times, and the kilometers that you swim are 200 kilometers.

Meters are kilometers are measurement units used to measure length. They are used to write the value of the measurements. There are seven basic units of measurement. The values are liters, kg, meters, grams, milliliters, etc.

Meter is a SI unit, it is denoted by small m, kilometers is unit of length which is denoted by km. The SI unit is the internation unit system of measurement.

One meter is equals to 1000 kilometers. An Olympic swimming pool is 50 meters long. A person swims 4 time of 50 kilometers.

So, 50 x 4 = 200 km.

Thus, the kilometers that you swim are 200 kilometers.

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1.958 x 10²⁵ formula units of Cr₃ (PO₄) ² are present in 32.45 mol of Cr₃(PO₄) ².

A mole is a unit used to quantify a substance's quantity. One mole of a substance is the volume of that substance that contains exactly 12 grams of carbon-12's weight in atoms (or other elementary particles like ions, molecules, or atoms).

We need to use Avogadro's number, which is roughly 6.02 x 10²³ particles per mole, to convert from moles to formula units.

We must first figure out how many units of the formula there are in a mole of Cr₃ (PO₄) ². One Cr³⁺ ion and two PO₄³⁻ ions make up the formula unit for Cr₃ (PO₄) ². As a result, we can get the total number of ions in one unit of the formula as:

1 Cr³+ ion + 2 PO₄⁻³ ions = 3 ions.

Consequently, make up one mole of Cr₃ (PO₄) ²:  6.02 x 10²³ particles /mole = 3 ions / formula unit= 1.806 x 10²⁴ ions/mole.

Using the conversion factor below, we can determine how many formula units are contained in 32.45 moles of Cr₃ (PO₄) ²:

5.875 × 10²⁵ ions = 32.45 moles x 1.806 x 10²⁴ ions/mole.

Because Cr₃ (PO₄) ² has a formula unit of 3 ions, we can calculate the number of formula units by dividing the total number of ions by 3.

5.875 x 10²⁵ ions/3 ions/formula unit = 1.958 x 10²⁵ formula units.

Consequently, 1.958 x 10²⁵ formula units of Cr₃ (PO₄) ² are present in 32.45 mol of Cr₃(PO₄) ².

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Answer:

A scientific theory is a widely accepted belief on why something happens in the natural world while a scientific law is proven to a fact that shows what happens.

Explanation: