do you think the mass of the products after the chemical reaction would be greater than, less than, or the same as the mass of the reactants before the chemical reaction?

Answer:

Aquatic plants have aur filled tissues to make them easy to float.....

Explanation:

It provides buoyancy

Answer:

formation of a precipitate.

Explanation:

This is because during production of cheese, citric acid is added to raise the acid level and rennet is added as an enzymes. This make the milk to coagulate and form solid and semi solids. Some part become solid part which is the cheese and the water is separated and it is called whey. That is it separated the solid from the liquid part . The precipitate is the solid part.

The acceleration of the bike can be obtained as 1.67 m/s^2.

By the use of the formula that we get from the Newton second law we can be able to connect the force that has been exerted on the bike to the acceleration of the bike and that is what we are going to do in the problem that we want to solve.

Given that;

F = ma

m = mass of the bike

a = acceleration of the bike

F = force applied

Then we have;

a = 150 N/90Kg

a = 1.67 m/s^2

The bike is going to have an acceleration of 1.67 m/s^2.

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Answer:

bar graph

Explanation:

because of the fact that the data is shown in such a way that a line graph would not work, you need to graph the data for each individual time

Answer:

Explanation:

The increase of the arable land has been affected partly by the reclamation of the marshes, but mostly by the transformation of large tracts of the puszta

An example of a reclamation is how landfill employees sift through garbage to find usable items. An example of a reclamation is trees growing on land that was heavily logged.

Answer:a

Explanation:

hghbh

Answer:

did you try to ask Tutor in Brainly?

The proposed Lewis structure for CH3 is reasonable.It follows the octet rule, with carbon having a total of four valence electrons and each hydrogen having one valence electron.

The Lewis structure proposed for CH3, which represents a methyl group, is reasonable. CH3 consists of a carbon atom bonded to three hydrogen atoms, with no lone pairs on the carbon atom. The carbon atom follows the octet rule, having a total of eight electrons in its valence shell (four from the carbon itself and one from each hydrogen atom). This arrangement satisfies the valence electron count for both carbon and hydrogen, making the proposed Lewis structure reasonable for CH3.

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The Unit price for A is $0.25625 and Unit price for B is $0.22857. It is better to buy B because unit price (price per ounce) for B is less than that of A.

A: $6.15 for 24 fl oz of dishwashing liquid

B: $9.60 for 42 fl oz of dishwashing liquid

To find:The unit price (price per ounce) and which is a better buy.

Solution:

Unit price (price per ounce) for A=\($\frac{6.15}{24}=0.25625$\)

Unit price (price per ounce) for B=\($\frac{9.60}{42}=0.22857$\)

We see that unit price (price per ounce) for B is less than unit price (price per ounce) for A. Therefore, it is better to buy B because we will get more dishwashing liquid for the same amount of money or the same quantity of dishwashing liquid for less amount of money.

This can also be observed by computing the price of dishwashing liquid for 24 fl oz for both A and B.

For A, cost of 1 fl oz of dishwashing liquid=\($\frac{6.15}{24}$\)

Therefore, cost of 24 fl oz of dishwashing liquid=$6.15

For B, cost of 1 fl oz of dishwashing liquid=\($\frac{9.60}{42}$\)

Therefore, cost of 24 fl oz of dishwashing liquid=\($(24\times\frac{9.60}{42})=5.49$\)

Clearly, 24 fl oz of dishwashing liquid will cost less if we buy B instead of A. Therefore, B is a better buy. Therefore, unit price (price per ounce) for A=$0.25625

Unit price (price per ounce) for B=$0.22857
It is better to buy B because unit price (price per ounce) for B is less than that of A.

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Answer:

B(v, T) = 2hv^3/c^2 1/hv

The metal that does not act as a sacrificial electrode for iron is C. Mn (Manganese).

Answer:The first thing you need to do is calculate the molar mass of C4H10.

Explanation:

Answer:

Explanation:

\(\mathrm {Hey, there!}\)

Let's solve your problem -

The answer to the question is 4.18 10^7.

Here is my clarification/explanation to support:

To convert a standard number to scientific notation, we have to move the decimal point up until we have a 1 digit number.

When we keep moving the decimal point, we get 4.18

Now, we will count the numbers after the 8 to get the 10 area.

There are five numbers after the 8, so we get 10^5.

Now, we will add 2 more to the 5, we get 10^7

Our answer will be: 4.18 10^7

\(\mathrm {Best, of, Luck!}\)

HBr, HCl, HClO₄, KBr and NaCl are all classified as strong electrolytes

HBr (hydrobromic acid), HCl (hydrochloric acid), HClO4 (perchloric acid), KBr (potassium bromide), and NaCl (sodium chloride) are classified as strong electrolytes because they dissociate completely or nearly completely into ions when dissolved in water.

In the case of HBr, HCl, and HClO₄, they are strong acids. When they dissolve in water, they release a high concentration of hydrogen ions (H⁺) and their respective anions (Br⁻, Cl⁻, and ClO₄⁻) which can conduct electric current.

KBr and NaCl, on the other hand, are strong ionic compounds. They dissociate completely into potassium (K⁺) and bromide (Br⁻) ions, and sodium (Na⁺) and chloride (Cl⁻) ions, respectively, when dissolved in water. These freely moving ions enable the solution to conduct electricity.

In summary, these compounds are classified as strong electrolytes because they readily produce ions in solution, allowing them to conduct electricity effectively.

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Answer:

Explanation:

The higher the value of a, the greater the attraction between molecules and the more easily the gas will compress.

The b term represents the excluded volume of the gas or the volume occupied by the gas particles.

Correct option is changing the leaving group from SCN⁻ to Cl⁻

Briefly stated, associative mechanisms entail binding a fresh ligand to the complex compound, whereas dissociative mechanisms entail releasing a ligand from the complex compound.

These patterns of interpersonal assistance are known as associative processes. They participate in at least one area of social life. Dissociative processes separate individuals from one another. They are different in a few different facets of social life.

In Dissociative mechanism, the metal ligand bond should be weak

so dissociation of bond easily takes place.

Cl⁻ is better  leaving group than SCN⁻

Correct option is changing the leaving group from SCN⁻ to Cl⁻.

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Complete question is "Consider a series of Rh(III) reactions known to be activated by dissociative (or ld) pathways.

What is the expected effect of the following changes on the rate of the reactions:

a. An increase on the overall charge on the complex.

b. Changing the leaving group from SCN to Cl

c. Changing the entering group from Cl- to I."

The  theoretical yield of the solution has been obtained as  17.1 g

Let us recall that each time that we hear about a chemical reaction what we are talking about is the combination of two or more reactants and a product must be formed. In this case we are to find the theoretical yield of this reaction.

We have been told that the HCl is in excess thus we have the 2-methyl-2-butanol as the limiting reactant.

Mass of the solution = density * volume

Mass of the solution = 0.805 g/ml * 17.6 ml

= 14.2 g

Number of moles = mass/molar mass

= 14.2 g/88 g/mol

= 0.16 moles

Given that the reaction is 1:1, 0.16 moles of the product is obtained.

Theoretical yield = Number of moles products * molar mass of products

= 0.16 moles * 106.59 g/mol

= 17.1 g

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Answer:SO2 is a covalent compound made up of sulfur and oxygen atoms, so the stock system is not applicable here as it is used for naming compounds that contain metal ions with different oxidation states.Instead, the IUPAC (International Union of Pure and Applied Chemistry) name for SO2 is sulfur dioxide.

Explanation:So I helped you help me please

The compound SO₂ is named sulfur dioxide using the Stock system.

In the Stock system, the names of chemical compounds are based on the oxidation states of the elements involved. The oxidation state refers to the charge that an atom carries when it forms a compound.

Sulfur (S) has an oxidation state of +4, and oxygen (O) has an oxidation state of -2. The compound's name reflects these oxidation states.

Combining the elements and their oxidation states, the compound is named "sulfur(IV) oxide" using the Stock system. However, it is more commonly known as sulfur dioxide, which is the traditional name for the compound.

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The mass number of the daughter atom formed from the alpha decay of a certain radioactive atom that has 90 protons and 142 neutrons is 228.

Alpha decay of a radioactive material is the release of an alpha particle that posseses mass number of 4 and atomic number of 2.

According to this question, a certain radioactive atom that has 90 protons and 142 neutron undergoes alpha decay. This means that the mass number of the daughter atom will be as follows:

Mass number of radioactive atom = 142 + 90 = 232

Mass number of daughter atom = 232 - 4 = 228

Therefore, the mass number of the daughter atom formed from the alpha decay of a certain radioactive atom that has 90 protons and 142 neutrons is 228.

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Answer:

False

Explanation:

Brainliest??

The volume of the irregular solid from the image that have been shown is  12 mL

To obtain the volume of the irregular solid;

a. Measure the initial volume of water in the cylinder.

b. Carefully lower the irregular solid into the water, ensuring it is fully submerged without trapping any air bubbles.

c. Record the new volume of water in the cylinder.

d. The volume of the irregular solid is equal to the difference between the final and initial water volumes.

The volume is;

32 mL - 20 mL = 12 mL

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The initial momentum of the boy is 0 kgm/s the right option is A. 0 kgm/s.

Momentum can be defined as the product of mass and velocity. The S.I unit of momentum is kgm/s.

The initial momentum of the boy can be calculated using the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The initial momentum of the boy is 0 kgm/s the right option is A. 0 kgm/s.
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the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.

Given data:

Atomic mass of Li-7, A = 7.016003

The atomic mass of Li-7 is the sum of the number of protons and neutrons in it. Therefore, the number of neutrons in Li-7 is:

Neutrons = Atomic mass - Protons= 7.016003 - 3= 4.016003The mass of 3 protons and 4.016003 neutrons in Li-7 is: Mass of protons + Mass of neutrons = (3 x 1.007276) + (4.016003 x 1.008665) = 3.021828 + 4.029454 = 7.051282 u

Therefore, the mass defect in Li-7 is:

Mass defect = Actual mass - Calculated mass

= Atomic mass - Mass of protons and neutrons

= 7.016003 - 7.051282

= -0.035279 u

Nuclear Binding Energy per nucleon (BE/A) can be calculated using the formula:

BE/A = [Δm.c² / A]

where Δm is the mass defect and c is the speed of light which is 2.998 × 10⁸ m/s.

Substituting the values in the above formula:

BE/A = [(-0.035279) × (2.998 × 10⁸)² / 7]= 5.60553 × 10⁻¹² J/nuclide

Therefore, the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.

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The family (group) of elements that have a valence-level electron configuration of 1 are alkali metals. Hence, the answer is option C.

A group or family in the periodic table consists of all the elements arranged in a single vertical column. There are eighteen groups in total. Elements in the same group tend to have the same chemical properties because they contain the same number of electrons in their outermost shells (valence electrons).

Elements in the first group or group 1 have only one electron in their outermost shell. They are known as alkali metals. They are called alkali metals because they react with water to form bases or alkali. These metals must be stored under oil as they are very reactive and easily react with air and water.

Alkali metals are also very electropositive and form ions by giving out their one valence electron, carrying a charge of +1. The three alkali metals are Lithium (Li), Sodium (Na) and Potassium (K), with Potassium being the most electropositive.

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The planar density of a crystal lattice represents the number of atoms that lie on a particular plane per unit area.

The (011) plane is a plane in the crystal lattice that is perpendicular to the [011] direction. To determine the planar density of the (011) plane in iridium, we first need to find the area of the plane. The area of the (011) plane is given by:

\($A = a^2/2$\)

where $a$ is the lattice parameter of the crystal, and in this case, \($a = 2r/\sqrt{2} = 0.283 \ nm$\).Thus, the area of the (011) plane is:

\($A = (0.283 \ nm)^2/2 = 0.040 \ nm^2$\)

Next, we need to find the number of atoms on this plane. In an fcc crystal, there are four atoms per unit cell, and the (011) plane intersects one-fourth of each of the four atoms in the unit cell. Therefore, the number of atoms on the (011) plane per unit area is:

\($n = 4/4A = 100 \ nm^{-2}$\)

Finally, we express the answer as:

\($n_{(011)} = \frac{4}{4A_{(011)}} = \frac{4}{a^2/2} = \frac{4}{(2r/\sqrt{2})^2/2} = \frac{100}{nm^2}$\)

Therefore, the (011) planar density of iridium \((fcc, r= 0.200 nm)\) is 100 atoms per \(nm$^2$\).

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Explanation:

I know only one.You are in form.....

A replacement reaction is one wherein a set of atoms is replaced by another atom in a molecule. In the given reactions is 2Na + Cl₂ → 2NaCl is not a replacement reaction.

A displacement reaction also known as a replacement reaction can be defined as one wherein an atom is displaced by another atom in a molecule. For example, when iron (Fe) is added to a solution of copper sulfate (CuSO₄), it displaces the copper (Cu) metal.

A single replacement reaction can be described as a kind of redox reaction when an element moves out of a compound, one element is replaced by the other in its own compound.

\(A +BC\longrightarrow AB +C\)

Double replacement reactions take place mostly in aqueous solutions wherein the ions precipitate and the exchange of ions occurs. The double replacement reaction can be represented as:

\(AB +CD\longrightarrow AC +BD\)

Therefore, option (D) is correct.

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A major tobacco company is test-marketing a cigarette which incorporates thin layers of extra paper, which restrict the amount of oxygen entering the cigarette.

This modification slows down the burning rate and reduces the heat generated by the cigarette. To address the issue of fires caused by cigarettes, a prominent tobacco company is introducing a modified cigarette into test markets. This cigarette incorporates thin layers of additional paper, strategically placed to limit the amount of oxygen available to support combustion. By restricting oxygen flow, the burning rate of the cigarette is slowed down, reducing the heat generated in the process.

The concept behind this innovation is to create a cigarette that is less likely to ignite flammable materials if accidentally discarded or left unattended. By reducing the burning rate and heat intensity, the risk of fires caused by cigarette accidents is significantly diminished. The extra layers of paper act as a barrier, effectively decreasing the oxygen supply to the lit tobacco and minimizing the potential for ignition.

This test-marketing initiative by the tobacco company reflects an acknowledgment of the need to address fire safety concerns associated with cigarette use. While the new design may help reduce the risk of fires caused by cigarettes, it is important to note that the ultimate goal should be to promote smoking cessation and minimize the overall harm caused by tobacco use. Fire-safe cigarettes can provide a temporary solution, but efforts to discourage smoking and support individuals in quitting remain crucial for public health and safety.

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