Identify this reaction

C5H12 + O2 ---> CO2 + H20

A. Synthesis

B. Combustion

C. Single Displacement

D. Double Displacement


4. Particles in which state of matter are the most likely to interact with each other to cause a chemical reaction?

A. Gas

B. Liquid

C. Solution

D. Solid


2. Identify this reaction

C + S8 ---> CS2

A. Synthesis

B. Combustion

C. Single Displacement

D. Double Displacement


3. Identify this reaction

Al + S2 ---> Al2S3

A. Synthesis

B. Combustion

C. Single Displacement

D. Double Displacement

If 170 milligrams of a radioactive substance decays to 85 g after 16 hours. Then, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.

The decay of the radioactive substance follows an exponential decay equation of the form:

\(N(t) = N_{o} \times e^{-kt}\)

Where:

N(t) is the amount of substance remaining at time t

N₀ is the initial amount of substance

k is the decay constant

t is the time elapsed

Given to us is N₀ = 170 mg and N(16) = 85 mg. We can use this information to find the decay constant, k.

\(85 = 170 \times e^{-k \times 16}\)

Dividing both sides by 170:

\(0.5 = e^{-k \times 16}\)

To solve for k, we can take the natural logarithm (ln) of both sides:

ln(0.5) = -k × 16

from this, the value of k comes out to be:

k = 0.0431

Now we can use the decay equation to find the amount of substance remaining after 21 hours, N(21):

\(N(21) = 170 \times e^{-0.0431 \times 21}\)

Calculating this expression:

N(21) = 75.2

Therefore, after 21 hours, approximately 75.2 mg of the radioactive substance will remain.

Learn more about radioactive decay here:

https://brainly.com/question/1770619

#SPJ4

(a) When the density of gold is 19.32 g/\(cm^{3}\) than area of the gold leaf is approximately 0.4386 cm².

(b) The length of the gold fiber is given by h = 0.4386 cm³ / (π * (2.500 × 10⁻⁴ cm)²).

To solve these problems, we can use the formula for the volume of a shape and the given density of gold.

(a) To find the area of the leaf, we can use the formula for the volume of a rectangular shape: V = A * h, where V is the volume, A is the area, and h is the thickness.

Given the mass of gold (m = 8.489 g) and density (ρ = 19.32 g/cm³), we can find the volume: V = m / ρ.

Substituting the values, we have V = 8.489 g / 19.32 g/cm³ = 0.4386 cm³.

Since the leaf is pressed into a thin shape, we can assume it has a rectangular shape, and the volume is approximately equal to the area: A ≈ V = 0.4386 cm².

(b) To find the length of the fiber, we can use the formula for the volume of a cylindrical shape: V = π * r² * h, where V is the volume, r is the radius, and h is the length.

Given the mass of gold (m = 8.489 g) and density (ρ = 19.32 g/cm³), we can find the volume: V = m / ρ.

Substituting the values, we have V = 8.489 g / 19.32 g/cm³ = 0.4386 cm³.

The volume of a cylinder is also equal to the product of the cross-sectional area (π * r²) and the length (h), so we have: π * r² * h = 0.4386 cm³.

Substituting the radius (r = 2.500 μm = 2.500 × 10⁻⁴ cm), we can solve for the length: h = 0.4386 cm³ / (π * (2.500 × 10⁻⁴ cm)²).

To summarize:

(a) The area of the gold leaf is approximately 0.4386 cm².

(b) The length of the gold fiber is given by h = 0.4386 cm³ / (π * (2.500 × 10⁻⁴ cm)²).

To know more about density click here:

https://brainly.com/question/29775886

#SPJ11

Answer:

A. two or more atoms held together with bonds make up a molecule. 

Explanation:

mark brainiest pls <3

The milligrams of the gas are formed if 10.0ml of 3.00% hydrogen peroxide solution decomposes, The density of the solution is 1.00 g/mL is 300 mg.

The equation is as follows :

2H₂O₂(l)   ---->   2H₂O(l)   +   O₂(g)

The density of the solution = 1 g/mL

The volume of the water = 100 mL

The volume of the H₂O₂ = 10 mL

The mass of the hydrogen peroxide = 3 g

2 moles of the hydrogen peroxide produces the 1 mole of the oxygen gas.

The mass of the O₂ =   (10 mL × 3 g of H₂O₂ ) / 100 mL

                                = 0.3 g = 300 mg

To learn more about density here

https://brainly.com/question/29102161

#SPJ4

Answer:

The answer is "Igneous".

Explanation:

Igneous rock (or magmatic rock) is one of the 3 main forms of stone, the other metamorphic and sedimentary, derived from Latin "ignis", which denotes flame, which is formed through magma or lava melting and reasserting.  

This hardening of liquid-solid rock shapes the inglorious rock. Its diabasic, peridotite, gabs, quartz, pegmatites, or peridotite are examples of intrusive igneous rocks. Exceptional ignorant stones burst mostly on the surface, cooling fast and forming small crystals.

The rate at which N\(_{2}\) disappears is 0.016 M/s, while the rate at which H\(_{2}\) disappears is 0.0213 M/s.

In the balanced chemical equation N\(_{2}\)(g) + 3 H\(_{2}\) (g) → 2NH\(_{3}\)(g), the stoichiometric coefficients represent the mole ratios between the reactants and products.

Since the reaction rate is given for NH\(_{3}\), we can determine the rates of disappearance of  N\(_{2}\) and H\(_{2}\) by comparing their stoichiometric ratios in the reaction.

The stoichiometric ratio between  N\(_{2}\) and NH\(_{3}\) is 1:2, meaning for every mole of  N\(_{2}\) consumed, 2 moles of NH\(_{3}\) are produced. Therefore, the rate of disappearance of  N\(_{2}\) is half of the rate of formation of NH\(_{3}\).

Similarly, the stoichiometric ratio between H\(_{2}\) and NH\(_{3}\) is 3:2. This means that for every 3 moles of H\(_{2}\) consumed, 2 moles of NH\(_{3}\) are produced. Therefore, the rate of disappearance of  H\(_{2}\) is (2/3) times the rate of formation of NH\(_{3}\).

Given the rate of formation of NH\(_{3}\) as 0.032 M/s, the rate of disappearance of  N\(_{2}\) would be 0.016 M/s (0.032 M/s ÷ 2), and the rate of disappearance of  H\(_{2}\) would be approximately 0.0213 M/s (0.032 M/s × 2/3).

Therefore, the rate of disappearance of  N\(_{2}\) is 0.016 M/s, and the rate of disappearance of  H\(_{2}\) is 0.0213 M/s.

You can learn more about chemical equation  at

brainly.com/question/4425414

#SPJ11

The solubility of the gas is reduced when thermal energy is added to the solution, which overcomes the forces of attraction between the solvent molecules and the gas molecules.

Just consider it from a straightforward angle. Is it true that heating a solvent accelerates evaporation? Which glass will entirely evaporate first, at a temperature of 25 or 75 degrees, if you place the same amount of water in them both?

Gases are already inherently gases. Imagine how anxious gas molecules would be to escape if solvent molecules were to want to escape from the bulk solvent when the temperature was raised.

To more about Solubility of gas click here:

https://brainly.com/question/14396373

#SPJ4

The reaction of propanamide with methylmagnesium bromide (1 eq.) yields a tertiary amide.

Reversible addition-elimination nucleophilic substitution reactions take place in this reaction mechanism, involving the bimolecular attack of the nucleophile (methylmagnesium bromide) and the displacement of the leaving group (bromide) from the substrate (propanamide).

This yields a carbocation intermediate, which is then attacked by water. The resulting alcohol undergoes dehydration through an acid-catalyzed cyclization to form an α,β-unsaturated intermediate. After protonation, the π-bond of the intermediate is eliminated and the tertiary amide is formed.

The overall stoichiometry of the reaction is 1:1, with one equivalent of propanamide and one equivalent of methylmagnesium bromide reacting to form the product tertiary amide. This reaction is useful in organic synthesis, as the tertiary amide can be hydrolyzed in acidic media to produce an amine, which can be used in further synthetically reactions.

know more about tertiary amide here

https://brainly.com/question/33301535#

#SPJ11

Option C, a more saturated fat is the product(s) for the hydrogenation of corn oil.

Organic molecules are frequently reduced or saturated by the process of hydrogenation, which is a chemical reaction between hydrogen (H2) and another substance or element. The process of incorporating hydrogen molecules into the various carbon-carbon bonds is known as hydrogenation. Saturated fats emerge from this process. Double bonds change into single bonds throughout this Saturated fats, and the melting point steadily increases.

learn more about  hydrogenation here:

https://brainly.com/question/14232628

#SPJ4

The ways an electron can return to ground state is by releasing energy.

To learn more about electron from the given link :

https://brainly.com/question/1255220

#SPJ4

Answer:

B. Organism

Explanation:

Answer: The answer would be organism/organelle

If im wrong im srry!

Hope this helps!

Explanation:

Answer:

12,375 cm³

Explanation:

v=l×w×h

Since there are 3 books the equation would then be

v=3(l×w×h)

v=3(25×15×11)

v=3(4,125)

v=12,375 cm³

Answer:

Iodine

Explanation:

Answer:

D

Explanation:

Answer: If more than one variable is changed in an experiment, scientist cannot attribute the changes or differences in the results to one cause. By looking at and changing one variable at a time, the results can be directly attributed to the independent variable.

Answer:

For the most part, in mitosis, diploid cells are partitioned into two new diploid cells, while in meiosis, diploid cells are partitioned into four new haploid cells.The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred.

Explanation:

The True statement is Option A. When it is summer in the northern hemisphere, it is winter in the southern hemisphere.

This is due to the Earth's tilt and its revolution around the Sun. The Earth is tilted at an angle of 23.5 degrees, which causes different parts of the planet to receive varying amounts of sunlight throughout the year. During the northern hemisphere's summer, the North Pole is tilted towards the Sun, which means it receives more direct sunlight, making it warmer. At the same time, the South Pole is tilted away from the Sun, making it colder, and hence it is winter in the southern hemisphere. This phenomenon is reversed during the northern hemisphere's winter, with the South Pole being tilted towards the Sun, and it is summer in the southern hemisphere.

Option (B) is incorrect because day and night occur due to the rotation of the Earth on its axis, and it is not related to the hemisphere's seasons. Option (C) is also incorrect because the equator does not experience winter or summer, but it does experience rainy and dry seasons. Option (D) is incorrect because the poles do not have distinct seasons, but they do experience periods of continuous daylight and darkness depending on their position relative to the Sun.

In conclusion, the correct statement is (A) When it is summer in the northern hemisphere, it is winter in the southern hemisphere, due to the Earth's tilt and revolution around the Sun.

Know more about Summer here :

https://brainly.com/question/29825389

#SPJ11

The density of the solid is  6.724 g/ml.

Density is the number of factors which can be people, animals, vegetation, or objects in a sure place. To calculate density, you divide the number of objects by the dimension of the place. The populace density of a rustic is the wide variety of human beings in that us of a divided by means of the location in square kilometers or miles.

The density of an amount to being counted is its mass divided by means of its quantity. it also includes measured at zero °C and at 1 atmosphere of stress. Density is vital in figuring out the buoyancy of materials in fluids, as well as in evaluating materials and other measurements.

The density of an object is certainly one of its maximum crucial and easily-measured physical properties. Densities are extensively used to perceive natural substances and to represent and estimate the composition of many varieties of combos.

density = mass/ volume

      = 975g/145ml

      = 6.724 g/ml

Learn more about density here:-https://brainly.com/question/1354972

#SPJ9

Answer:

highlight the key words

Explanation:

conjunctions

Answer:

dont know but hey it is me ur freind lol

Explanation:

Answer:

laboratory/safety shower.

Otherwise, immediately wash with water and tell your teacher or instructor.

Answer:

Political Map. A political map shows the state and national boundaries of a place. ...

Explanation:

The skin of grapes contains an antioxidant called resveratrol. Determine the resveratrol functional groupings. Alcohol makes comprises the compound's functional group.

An organic molecule known as an alcohol has at least one hydroxyl functional group attached to a saturated carbon atom. The major alcohol ethanol, which is used as a narcotic and is the main alcohol contained in alcoholic beverages, was the substance to which the term "alcohol" originally referred.

Resveratrol is a naturally occurring polyphenol that can be found in a variety of foods, including grapes, berries, peanuts, and several medicinal plants. It has a stilbene functional group in its molecular structure.

Thus, The skin of grapes contains an antioxidant called resveratrol. Determine the resveratrol functional groupings. Alcohol makes comprises the compound's functional group.

To learn more about alcohol, follow the link;

https://brainly.com/question/4698220

#SPJ1

Answer:

they all look like they are

Explanation:

Answer:

Only A and B are redox

Explanation:

Redox reactions are ones where elements change their oxidation states. That means any reactions that involve free elements that are also in compounds, ex: Na in a) is in both 2Na and 2NaCl are redox because their oxidation states change from 0 to whatever in the compound. This means A and B are redox reactions.

For C, (CO3) has a charge of -2, and reactants have charges C = +4, O = -2, and H = +1

The product compounds are all zero charge, so charges C = +4 and O = -2 makes CO2 charge 0 and H = +1 and O = -2 also gives H2O a zero charge. Since al elements of reactants are products do not have a change in charge, it is not redox.

Note that Oxygen is almost always at a charge of -2, that should help you with  calculations.

Similarly in d), (NO3) has charge -1, with charge N = +5, O = -2, and Pb = +2.

K tends to have charge +1 and I -1.

For d) reactants, Pb = +2 and I = -1 still gives PbI2 a zero charge. KNO3 also leaves it a zero charge.

Therefore d) also does not have any charge change in elements so it is not redox

Explanation:

Changing the environment takes away habitats from animals and some nutrients plants need

Hope this helps :>

Answer:

c) Membrane lipids are amphipathic.

Explanation:

A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life.

In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles found in all living organisms such as trees, birds, and bacteria include; nucleus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, cytoskeleton, vesicles, golgi apparatus, and cell membrane.

Cell membrane is the wall of a cell and typically controls what leaves and enters the cell.

A general property of cell membranes is that membrane lipids are amphipathic. All the lipid molecules found in the cell membrane are amphipathic or amphiphilic, which means that they are "water loving" (hydrophilic) with a polar end or "water fearing" (hydrophobic) with non-polar end. Thus, membrane lipids have an end that's soluble in water (polar) while the other end is soluble in fat (non-polar).

The membrane lipids are amphipathic.  

• In the majority of cell membranes in animals, lipids, that is, fatty molecules forms about 50 percent of the mass of the cell.  

• All the molecules of lipid in a cell membrane are amphipathic, that is, they possess a polar end or hydrophilic and non-polar end or hydrophobic end.  

• The phospholipids are the most abundant lipids found in the cell membrane.  

• They have a polar head group and two hydrophobic hydrocarbon tails.  

• It is the amphipathic nature and shape of the molecules of lipids, which makes them to produce bilayers spontaneously.  

Thus, correct answer is option c, that is, membrane lipids are amphipathic.

To know more about:

https://brainly.com/question/12372995

Answer:

You can view more details on each measurement unit: molecular weight of H2S or grams This compound is also known as Hydrogen Sulfide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2S, or 34.08088 grams. Note that rounding errors may occur, so always check the results.

The number of grams that one "mole" of a substance weights is the definition of molar mass. So, the molar mass of H₂S is "34.08088"gams.

Find out more about the moles here:

brainly.com/question/20055843

In the box on a periodic table  we can find its atomic number, symbol, average atomic mass, and (sometimes) name of the element.

By the 20th century, it was clear that atomic numbers, not atomic masses, were involved in the periodic relationship. The periodic law, a more recent formulation of this relationship, states that an element's properties are a periodic function of its atomic number.

The elements are arranged in a modern periodic table in increasing order of their atomic numbers, and atoms with comparable properties are grouped in the same vertical column (Figure below). With its atomic number, symbol, average atomic mass, and (sometimes) name, each box represents an element. The elements are grouped in 18 vertical columns called groups and seven horizontal rows known as periods or series.

Each column's header lists the names of its groups. Roman numerals and capital letters have traditionally been used on labels in the United States. The IUPAC advises using the digits 1 through 18, and these labels are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the table's main body in order for it to fit on a single page.

Learn more about periodic table at https://brainly.com/question/11155928

#SPJ4

Answer:

I don't really understand, but here is my answer:

Tectonics plates can move back and forth, side to side, and into each other which causes earthquakes.

Hope this helps!

Sky

Answer:

(a) Mercury

Explanation:

Mercury with chemical symbol (Hg) is also regarded as " quicksilver". It is heavy and silvery in nature and belongs to d-block of the periodic table, it is metallic element and it is liquid at standard conditions of (temperature and pressure). It has Boiling point of about 356.7 °C with Atomic number of 80. It can molten above the temperature of ( −38.8 °C)

skeletal system

Explanation:

ribs are long curved bones forming the rib cage, which is part of the axial skeleton.