Substance A and Substance B undergo a chemical reaction to form substance C. What type of substance is A?

I think Substance C is a compound, but I am confused about substance A

An element is a pure substance that cannot be broken down into different types of substances. Examples of elements include carbon, oxygen, hydrogen, gold, silver and iron.

A chemical element is a substance defined by a set of atoms that have the same number of protons in their nucleus called the atomic number, hydrogen, gold and iron are examples of elements.

Therefore, we can conclude that a chemical element refers to a certain type of known atoms, which are distinguished from the others in their nature and their fundamental properties.

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Answer:

Specular reflection is correct answer by my views

hope it helps you

Answer:

6.022x10^23

Explanation:

Answer:

wind and water erosion

Answer:

C is the answer

Answer:

So its a theory by Alfred Wegener is that All land was one big piece of land called pangea in the early 20th century people began to think that land masses can move such as many do just from it being there or natural disasters then going in to more research they found that when putting the continents together it fit like a puzzle  and the fact that some fossils were far away from were the same were found

The theory of continental drift, based their theory on several lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

The continental drift hypothesis states that all the continents were once joined together as one large mass of land, but then the land spread apart and drifted into their current positions.

The hot magma flows in convection currents due to tremendous heat and pressure within the earth. These currents cause the tectonic plates that make up the earth's crust to move.

Thus, The theory of continental drift, based their theory on many lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

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During the experiment, the heat absorbed by the water in joules is 2339.2 Joules.

The heat absorbed by the water is calculated using the formula of heat change as follows:

Q = m × c × ΔT

where;

We can calculate the mass of the water using its density:

mass of water = volume of water × density of water

mass of water = 175.0 mL × 1.00 g/mL

mass of water = 175.0 g

We can then calculate the change in temperature of the water:

ΔT = final temperature - initial temperature

ΔT = 28.7°C - 25.5°C

ΔT = 3.2°C

Now we can calculate the heat absorbed by the water:

Q = m × c × ΔT

Q = 175.0 g × 4.18 J/g·°C × 3.2°C

Q = 2339.2 J

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Baking soda and vinegar are mixed in a balloon. A gas is produced, and the balloon expands to a volume of 4.19 L. 4.19 × 10-3 cm³ is the volume of the balloon. Therefore, option B is correct.

Gas is one of the fundamental states of matter. A pure gas is made up of individual atoms, elemental molecules made from one type of atom, or compound molecules produced from a variety of atoms. A gas mixture, such as air, contains a variety of pure gases.

Here to convert 4.19 liters to milliliters. Divide the volume value by 1000. We get 4.19 × 10-3 cm³.

Thus, option B is correct.

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Answer:

90g

Explanation:

I hope this helps plz give brainliest ! :D

Answer:

9.69g

Explanation:

Xmol of n2= 7.774/22.4= 0.346 mole

molar mass of n2 2×14 =28g/Mol

Mas of n2= 0.346×28

Mas of n2=9.69grams

Answer: C. Na2B4O7•10H2O

Explanation:

Hope this helps :)

The formula is tetrasodium borate-Na2B4O7.10H2O

Given- 0.0132 mol Na2B4O7 and 0.1311 mol H2O

Using the molar mass of the anhydrous Na2B4O7 and its mass percentage, we can calculate the molar mass of the hydrate (if we look at it as 100% of the mass) by stoichiometry.

Molar mass of Na = (22.990 g/mol)

Molar mass of B = (10.811 g/mol)

Molar mass of O = (15.999 g/mol)

Molar mass of Na2B4O7= 2⋅22.990 g/mol +4⋅10.811 g/mol +7⋅15.999 g/mol = 201.217 g/mol

201.217g/mol : 52.8%=x g/mol : 100%

​x g/mol = 201.217 g/mol⋅100%÷52.8 %

x g/mol= 381.093 g/mol

In 381.093 g of hydrate, we have 201.217 g of anhydrous Na2B4O7 , the rest of the mass is water.

381.093g−201.217g= 179.876 g of water

Molar mass of H = 1.008 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of  H2O= 1.008 g/mol+ 15.999g/mol  = 18.015 g/mol

179.876g ÷18.015 = 9.98= 10 moles of water per mole of hydrate.

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True statement for a nuclear reactions is that it changes the identity of the element.

Nuclear reactions are those reactions in which changes in the nucleus of atoms take place in the form of fission and fussion.

Hence identity of element changes.

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Answer:

37%+24%+23%=84% , i wish my answer is correct

The soda in a fridge has more thermal energy than the soda on the kitchen table.

Thermal energy is the total energy possessed by an object due to the motion of its particles. It is directly related to the temperature of the object. When a soda is placed in a fridge, it is exposed to a lower temperature environment. The fridge actively removes heat from the air inside, creating a cooler environment. As a result, the soda's temperature decreases. The decrease in temperature corresponds to a decrease in the average kinetic energy of the soda's particles, which directly affects its thermal energy.

On the other hand, a soda on the kitchen table is exposed to the surrounding room temperature. While the room temperature may vary depending on the location and climate, it is generally higher than the temperature inside a fridge. Consequently, the soda on the kitchen table has a higher temperature, which corresponds to a higher average kinetic energy of its particles and thus a higher thermal energy.

In summary, the soda in a fridge has more thermal energy than the soda on the kitchen table due to the lower temperature environment it is exposed to. The lower temperature corresponds to a decrease in the average kinetic energy of its particles and, consequently, a lower overall thermal energy.

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Answer:

4.43 g Cl₂

Explanation:

To find the mass of Cl₂, you need to (1) convert moles HCl to moles Cl₂ (via the mole-to-mole ratio from equation coefficients) and then (2) convert moles Cl₂ to grams (via the molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units. The final answer should have 3 significant figures like the given value.

4 HCl(g) + O₂(g) -----> 2 Cl₂(g) + 2 H₂O(g)
^                                   ^

Molar Mass (Cl₂): 2(35.453 g/mol)

Molar Mass (Cl₂): 70.906 g/mol

0.125 moles HCl          2 moles Cl₂             70.906 g
--------------------------  x  ----------------------  x  -------------------  =  4.43 g Cl₂
                                     4 moles HCl              1 mole

We need to use 973.24 grams of ferric chloride to prepare 2.00 L of a 3.00 M solution of FeCl₃.

Mass is a fundamental physical quantity that represents the amount of matter in an object. It is a scalar quantity and is measured in units of kilograms (kg) or grams (g). Mass is not the same as weight, which is the force exerted on an object due to gravity and varies with the strength of the gravitational field.

The mass of an object is determined by its inertia, which is the resistance to acceleration that an object exhibits due to its mass. The greater the mass of an object, the greater its inertia and the more force is required to accelerate it. Mass is a conserved quantity, meaning that it cannot be created or destroyed, only transferred or transformed through physical or chemical processes.

To calculate the mass of ferric chloride needed to prepare a 3.00 M solution of FeCl₃, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

Rearranging this formula gives:

moles of solute = Molarity x volume of solution

We can then use the molar mass of FeCl₃ to convert moles of solute to grams of FeCl₃. The molar mass of FeCl₃ is:

FeCl₃ = 55.845 + 3(35.453) = 162.206 g/mol

So, to prepare 2.00 L of a 3.00 M solution of FeCl₃, we have:

moles of FeCl₃ = Molarity x volume of solution

moles of FeCl₃ = 3.00 mol/L x 2.00 L

moles of FeCl₃ = 6.00 mol

mass of FeCl₃ = moles of FeCl3 x molar mass of FeCl3

mass of FeCl₃ = 6.00 mol x 162.206 g/mol

mass of FeCl₃ = 973.24 g

Therefore, we need to use 973.24 grams of ferric chloride to prepare 2.00 L of a 3.00 M solution of FeCl₃V.

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The observed mass increase was probably caused by the osmosis of water molecules from an unidentified solution.

Osmosis is the "Movement of Solute Molecules from Lower Concentration to a Higher Concentration of Solution Across a Semipermeable Membrane," according to the right definition.

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The inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

The inflation rate from 2014 to 2015, assuming that 2014 is the base year, can be determined using the Consumer Price Index (CPI). The CPI measures the cost of goods and services over time and is used to calculate inflation. The formula for calculating inflation rate using CPI is as follows: Inflation rate = ((CPI year 2 - CPI year 1) / CPI year 1) x 100To solve this problem, we first need to calculate the CPI for each year using the prices and quantities of nuts and meat.

Calculating CPI for 2014:CPI 2014 = (300 x $9) + (175 x $19) = $5,625 Calculating CPI for 2015:CPI 2015 = (420 x $9) + (340 x $14) = $9,460Using the CPI formula, we can calculate the inflation rate from 2014 to 2015:Inflation rate = ((CPI 2015 - CPI 2014) / CPI 2014) x 100= (($9,460 - $5,625) / $5,625) x 100= $3,835 / $5,625 x 100= 68.09% (to 2 decimal places) Therefore, the inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

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Answer:

\( \huge{ \boxed{53 \: L}}\)

Explanation:

Since temperature is constant the new volume can be found by using the formula for Boyle's law which is;

\(v_2 = \frac{p_1v_1}{p_2} \\\)

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

From the question

v1 = 37 L

P1 = 1 atm

P2 = 0.7 atm

Substituting the values into the above formula we have.

\(v_2 = \frac{37 \times 1}{0.7} = \frac{37}{0.7} \\ = 52.857 \approx53\)

We have the final answer as

Yes, atoms of the same element contain the same number of protons.

The reason for this is that the number of protons in the nucleus is the atomic number of the element. Due to the uniqueness of the atomic number, it is considered a way to identify elements For example, hydrogen has one proton in its nucleus.

Do all the atoms of an element have the same number of protons?

The number of protons in an atom is called its atomic number (Z). This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms.

Are all atoms the same in an element?

No. Two atoms of the same chemical element are typically not identical. First of all, there is a range of possible states that the electrons of an atom can occupy. Two atoms of the same element can be different if their electrons are in different states

How many protons are in every atom?

The number of protons in an atom is equal to the atomic number of the element. For example, let's use oxygen. According to the periodic table, oxygen has the atomic number eight.

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Answer:

C. Our eating habits

Hope that helps.

Answer:

Usually, you should lay down your educational background by listing the most recent or advanced degree first, working in reverse chronological order. But there are exceptions. Say you earned a degree in geography, but are now working in the field of online marketing. If you more recently completed coursework specific to social media or digital marketing, list that first to grab the reviewer’s attention.

Explanation:

Answer:

Start with the most recent  or advanced degree first, working in reverse chronological order.

Explanation:

Answer

A) The concentration of nutrients decreases, which improves the water quality in the pond.

Explanation

Dilution is a way to decrease pollution, in this case, freshwater will contain a low amount of nutrients, dissolving those present in the pond and reducing the overall concentration. Fewer nutrients derive in less eutrophication and hence better water quality.

The standard enthalpy change of the explosive reaction is -11408 kJ/mol.

The standard enthalpy change of the reaction can be calculated using the enthalpy of formation values of the reactants and products.

The enthalpy of the formation of ammonium nitrate (NH4NO3) is -393.5 kJ/mol, the enthalpy of the formation of the fuel oil (C10H22) is -249.7 kJ/mol, the enthalpy of the formation of oxygen (O2) is 0 kJ/mol.

The enthalpy of the formation of nitrogen (N2) is 0 kJ/mol, the enthalpy of the formation of water (H2O) is -285.8 kJ/mol, and the enthalpy of the formation of carbon dioxide (CO2) is -393.5 kJ/mol.

The equation for the explosive reaction is 3NH4NO3(s)+C10H22(l)+14O2(g)>3N2(g)+17H2O(g)+10CO2(g). Therefore, the standard enthalpy change of the reaction can be calculated using the following equation:

ΔH = [3(-393.5) + (-249.7) + (14*0) + (3*0) + (17*-285.8) + (10*-393.5)] - [3(-393.5) + (-249.7) + (14*0)]

ΔH = -11408 kJ/mol.

Therefore, the standard enthalpy change of the explosive reaction is -11408 kJ/mol.

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The complete question is attached below.

Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

What are Molecules ?

Molecules are the combination of two or more different atoms combine in a fixed ratio.

Molecules can be independently founded.

Atoms are always founded in combined state and does not occurs independently except rare earth elements which belongs to 18th group of periodic table.

Chemicals are taken in compound state But they undergo chemical reaction individually in molecular level.

Hence, Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

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Answer:

13.123.

Explanation:

Answer:

1) A

2) D

3) A

4) B

5) D

6) C

7) B

8) A

9) C

10) C

Explanation:

Sublimation refers to the direct change of a substance from solid to gas without passing through a liquid stage. Hence if camphor changes directly from solid to gas, camphor is a sublime substance.

Gases have a higher rate of diffusion than liquids because liquids have greater intermolecular forces while the intermolecular forces in a gas is negligible.

When a substance is heated, a point comes in which heat is supplied but the temperature of the body does not change. This is the point of phase change and the heat supplied at this point may be referred to as latent heat of fusion or vaporization depending on the particular process going on.

While it is true that evaporation occurs at all temperatures and the kinetic energy of molecules is directly proportional to the temperature of a body but the later statement does not explain the former. Rather evaporation occurs because some particles at the surface of the liquid are more energetic and escape due to unbalanced attractive forces acting on them.

Due to decrease in temperature, it takes a longer time to cook food at high altitudes but a lesser time to boil water at higher altitudes.

Gases are easily compressible by applying pressure because gases occupy negligible volume compared to the volume of the container. There is a significant inter particle space between gas particles.

The solid state contains the strongest degree of intermolecular forces. However, the reason offered, though correct, is not the correct explanation of the assertion stated.

This is the Tyndall effect. Colloidal particles scatter light rays and the path of the light becomes visible in the colloidal solution.

Salt solution is homogeneous. A homogeneous solution contains only one phase throughout. If it has a different composition, the solution is heterogeneous. Hence the explanation is false.

A true solution will not exhibit Tyndall effect because the particles are less than colloidal size. A true solution cannot be a heterogenous mixture hence the reason is false.