If 45 Ml of a 6.5 M solution of HNO3 is added to 55 ml of water what is the new concentration?

Answer:

The gravitational pull between the gas and dust matter leads to the formation of new galaxies

Explanation:

My teacher went over the answers and said that one was correct.

A nebula contains large amounts of dust and clouds. The gravitational pull between the gas and dusť matter leads to the formation of new galaxies does gravity play inside of nebulae. Therefore, option A is correct.

Gravity is the force that pulls objects toward the center of a planet or other body. The gravitational force keeps all the planets in orbit around the sun.

Gravity pulls you toward the ground because all objects with mass, such as our Earth, actually bend and curve the fabric of the universe, known as spacetime. Gravity is the curvature of the earth.

A nebula is densely packed with dust and clouds.The gravity play a role inside nebulae, The gravitational pull between gas and dus matter leads to the formation of new galaxies.

Thus, option A is correct.

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A) The answer to whether an average-size, single-family home be built with one day’s output from the saw mill is; No, it can't be built from one days output

B) The number of days will it take for the saw mill to produce enough lumber to build a neighborhood of 100 average-size homes is; 1100 days

A) From research, the average size capacity saw mill usually produces around 1500 board feet of boards per day.

Now, converting board ft to cubic meter gives;

1 board feet = 1/424 m³

Thus; 1500 board feet = 1500 * 1/424 ≈ 3.54 m³

Now, we are told that it takes 38 m³ of boards and plywood to build an average size single family home.

Since one days output = 3.54 m³

It is less than the volume required for the average sized house and so the daily output will not be sufficient.

B) Number of days to produce enough boards and plywood for the average sized family home = 38/3.54 ≈ 11 days

Thus, for 100  homes;

Number of days = 100 * 11 = 1100 days

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The volume of hydrogen gas produced is 19.8 L.

The balanced chemical equation is given as;

Zn + 2HCl → ZnCl₂ + H₂

from the reaction above;

1 mole of Zn = 1 mole of H₂

number of mole of 48.5 g Zn  is calculated as

48.5 g  /65.4 g/mol

= 0.74 mol Zn  = 0.74 mol H₂

The volume of hydrogen gas produced is calculated as follows;

PV = nRT

where;

T = 27°C + 273 = 300 K

V = nRT/P

V = (0.74 x 0.08206 x 300) / (0.921)

V = 19.8 L

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Answer:

compounds

Explanation:

It is a substance formed when two or more. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.

Answer:

Brain big big brain

Explanation:

Biggest brain small brain Big brain big stonks

1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

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Answer:

C) only potential energy.

A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

Thus, Many waterfalls are transient and only occur during rainstorms because of their location in the landscape, where they are often over bedrock and fed by a small contributing region.

 For general knowledge, we are listing the "Top 10 Highest Waterfalls in India" here. The Kunchikal Falls are the second-highest waterfall in Asia and the highest in all of India.

The waterfall, which is close to Agumbe in Karnataka's Shimoga district, has a height of 1,493 feet. The Varahi River creates the biggest waterfall. The sole permanent rain forest research is located in Agumbe Valley, one of India's most heavily rained-on regions.

Thus, A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

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Answer:

Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface.

Answer:

Three primary reasons. First, there is simply more water-covered places than dry ground places for the animals and plants to have lived. Second, the seas are much more crowded with the kinds of life that leave fossils than the land is. Third, the process that form fossils work very well under water.

Explanation:

Balance the half-reactions to guarantee that the number of electrons transferred in both reactions is the same:

NO3- + 8H+ + 10e- N2 + 4H2O H2 2H+ + 2e- NO3- + 8H+ + 10e-

The next step is to figure out how many electrons are moved when 145 molecules of H2 are oxidized. We can see from the balanced equation for the H2 half-reaction that 1 molecule of H2 makes 2 electrons:

2H+ + 2e- → H2

As a result, 145 molecules of H2 will yield:

145 molecular units H2 has two protons per molecule. 290 electrons Equals H2

Finally, we can use the denitrification reaction balanced equation to calculate how many molecules of N2 are created for 290 electrons:

1 molecule of N2 is produced by 10 electrons.

Therefore, 1 molecule N2 290 electrons/10 electrons = 29 molecules N2

29 molecules of N2 gas will be created.

To answer the second query, we must balance the half-reactions:

SO42- + 8H+ + 8e- H2S + 4H2O CO2 + 8H+ + 8e- CH3COO- + 2H2O SO42- + 8H+ + 8e- H2S + 4H2O

The balanced formulae show that 8 electrons are transferred in both half-reactions. As a result, in order to oxidize 48 molecules of CH3COO-, 6 molecules of SO42- must be reduced:

There are 48 nuclei CH3COO- 8 electrons per atom 384 protons = CH3CO-

384 electrons (eight electrons per atom) 48 units of SO42- SO42-

As a result, 48 molecules of CH3COO- reduced to CO2 will yield:

six electrons 4 H2O/molecule SO42- 24 units of SO42- H2O

The answer is that 24 molecules of water will be created.

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The amount of stock solution that would be needed to prepare the required solution would be 0.06 L.

The problem can be solved using the dilution principle. According to this principle, before and after diluting a particular solution, the number of moles of solutes in the solution must remain the same.

The dilution principle is expressed as an equation as shown below:

\(m_1v_1\) = \(m_2v_2\)

Where:

\(m_1\) = molarity before dilution (in this case, 13%)

\(v_1\) = volume before dilution (what we want to determine)

\(m_2\) = molarity after dilution (in this case, 0.5%)

\(v_2\) = volume after dilution ( in this case, 1.6 L)

Using the provided information, the volume of the stock solution to be taken can be calculated as follows:

\(v_1\) =  \(m_2v_2\)/\(m_1\)

    = 0.5 x 1.6/13

    = 0.06 L

In other words, 0.06 L of the stock solution would be required. This volume will be diluted to the 1.6 L mark with water in order to have the desired solution.

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0.26L is the volume of sodium hydroxide, NaOH, needed for the reaction to occur.

A measurement of three-dimensional space is volume. Several imperial or US customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively (such as the gallon, quart, cubic inch).

Volume and length (cubed) have a symbiotic relationship. The capacity of such a container is typically regarded to be its volume.

Molarity₁×Volume₁=Molarity₂×Volume₂

0.95 × 0.42=1.5×Volume₂

Volume₂=(0.95 × 0.42)/1.5

             =0.26L

Therefore, 0.26L is the volume of sodium hydroxide, NaOH, needed for the reaction to occur.

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Answer:

carbon dioxide and water

Explanation:

Example: Combustion of Methane (CH₄(g))

CH₄(g) + 2O₂(g) => CO₂(g) + 2H₂O(g)**

____________________

Note: The combustion of any hydrocarbon produces CO₂ & H₂O. That is,

Ethane (C₂H₆) + O₂ => CO₂(g) + H₂O(g)

Propane (C₃H₈) + O₂ => CO₂(g) + H₂O(g)

Butane (C₄H₁₀) + O₂ => CO₂(g) + H₂O(g)

The issue remaining is to balance the reaction equation. For these type equation balance Carbon 1st, then Hydrogen and finish with Oxygen. Balancing in this order leaves Oxygen which can be balanced using fractions. If problem requires lowest whole number ratios of elements, simply multiply entire equation by 2 to get standard equation*

______________________

*Standard Equation is defined as the smallest whole number ratios of elements. The 'standard equation' is significant in that it is assumed to be at STP conditions; i.e., 0⁰C (=273K) & 1.0 Atmosphere pressure.

    => 2C₂H₆ + 7O₂(g) => 4CO₂(g) + 6H₂O(g)  <= Standard Form of Rxn

    => 2C₃H₈ + 13O₂(g) => 4CO₂(g) + 5H₂O(g) <= Standard Form of Rxn

______________________

**Also, note that water, H₂O(g), is listed as a gas. In some cases it will be listed as a liquid, H₂O(l).

A substance burning in the presence of oxygen produces heat and light, a process known as combustion. Combustible compounds are defined as those substances that burn. Carbon dioxide and water are the products. The correct option is B.

The process of combustion is a chemical interaction between the fuel (hydrocarbon) and the oxygen. Heat and light energy are released when fuel and oxygen react. The flame then develops from the energy of heat and light. Hydrocarbon + Oxygen = Heat energy is the equation for a combustion reaction.

Complete combustion occurs when there is a sufficient amount of air available. The hydrocarbon fuel's carbon and hydrogen atoms undergo an exothermic reaction with oxygen to form carbon dioxide and water. Energy is released.

Thus the correct option is B.

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Answer:80.8g

Explanation:

 = . / ()

In this letter, express gratitude to your uncle, a university professor, for his invitation and congratulate him on his achievements.

Here are the steps to be followed:

By following these steps, you can write a thoughtful and appreciative letter to your uncle, expressing your gratitude for his invitation and congratulating him on his achievements.

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Based on the fgiven K_{a} values of the acids, the equilibrim concentrations of\(HC_{2}H_{2}O_{2}\) and \(NH_{4}^{+}\) is dtermined using ICE tables.

An acid dissociation constant, \(K_{a}\) of an acid is a measure of the strength of the acid in solution. The larger the \(K_{a}\) value of an acid, the stronger the acid, therefore, acid dissociation constants are usually apply to only weak acids because strong acids have exceedingly large \(K_{a}\) values.

It is written as a  qoutient of the equilibrium concentrations of the aqueous species in the acid solution.

For the weak acids such as \(HC_{2}H_{2}O_{2}\) and \(NH_{4}^{+}\), their equilibrim concentrations are determined using their \(K_{a}\) values and an ICE table.

The pH of solutions are estimated using indicators such as methyl orange, methyl red and phenolphthalein. The colors of indicators change according to the pH of the solution

Acidic solutions have pH less than 7 while alkaline solutions have pH greater than 7.

Therefore, acids have low pH and weak acids have low \(K_{a}\) values.

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Answer:

g. red, orange, yellow, blue

Explanation:

red is the hottest color and blue is the coolest. :)

Answer:

molecule

Explanation:

Answer:

b

Explanation:

protons and electrons can be in all atoms and it's not A because a molecule can contain aluminum it is not the smallest. The answer is B because an atom has all of the properties of aluminum and it can't get smaller without losing its properties.

Answer:

H-F

Explanation:

The electronegativity difference between H and F in H-F is higher, therefore, the H-F bond is more polar.

Calculations :

We are given -

• Temperature T1 = 273K

• Pressure P1 = 0.75atm

• Temperature T2 = 350K

• Pressure P2 = .....??

This means that :

273 K produces 0.75atm

350 K will produce x atm ...... (do a cross multiply)

Therefore x atm = (350K * 0.75atm)/273K

= 0.96 atm

• This means that at 350K, the resulting pressure will be 0.96atm

Explanation:

The reactant contains 2N and 6H

The product contains 2N and 6H

Therefore, the chemical equation is balanced

From the equation, for every 1 mole of N2 that reacts, 3 moles of H2 are required.

We know 28.6 grams of N2 reacted, but we don’t know the mass ratio but just the mole ratio, so we have to convert 28.6 grams of N2 to the corresponding moles of N2.

From the periodic table, the molar mass of N is about 14 g/mol, so the molar mass of nitrogen gas or N2 is two times of that which is 28 g/mol.

With this, we can calculate moles of N2, but we also need to make sure the equation is setted up the right way.

Looking at the units, if we cancel out the grams, we are left with mol. We also know that in multiplication, numerator of one number cancel with the denominator of another number and vice versa

So the equation looks like this 28.6g * mol/28g = 1.021 mol N2

So the number of moles of H2 required is 1.021 mol N2 * 3 mol H2/1 mol N2 = 3.063 mol H2 (notice that mol N2 canceled out, so the equation is set up correctly)

However, the question ask for number of grams of H2 needed, so we need the molar mass of hydrogen gas or H2, which is 1*2 = 2 g/mol

3.063 mol H2 * 2 g H2/ mol H2 = 6.126 g H2

Ans: 6.126 g H2

1. Suppose 10 atoms of carbon (C) tear with 20 atoms of (O)….

B. 30

2. Which procedure could be used to demonstrate that matter is conserved during a chemical reaction?

B. Find the mass of an acid and a base. Combine them to produce water and salt. Find the mass of the water and salt.

3. What is always true according to the law of conservation of matter?

A. Atoms can be rearranged during a chemical reaction but cannot be added or taken away.

4. A student combines 2 liquids in a beaker…

B. The reaction produced a Gas that escaped the beaker

Answer:

it is...

Explanation: Pure copper(II) sulfate is white. It is also known as anhydrous copper(II) sulfate because it has no water in it. When water is present in a sample of copper(II) sulfate it turns blue.

Answer:

put it in a beaker then tne beaker in a boiling water bath and when it temperature has reached 100°c condense that gas ... if there is no gas evaporating by 100° then there is no water

Explanation:

water evaporates at 100°c

Explanation:

se

te

as

b

wish you the best on this assignment love, god bless you my dear .

Answer:i think its right because i had this one before

2u+3u+8u=0

The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO\(_2\) and water is equal to the energy required to break the bonds of sugar and oxygen. Therefore, the correct option is option A.

Cells turn sugars into energy through a process called cellular respiration. Cells need fuel or an electron acceptor to power the chemical process that converts energy into usable forms such as ATP along with additional kinds of energy that can be utilised to power cellular reactions.

All multicellular species, including eukaryotes, as well as certain single-celled organisms, generate energy by aerobic respiration. Utilising oxygen, which is the strongest electron acceptor found in nature, is called aerobic respiration. The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO\(_2\) and water is equal to the energy required to break the bonds of sugar and oxygen.

Therefore, the correct option is option A.

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An aromatic compound is cyclohexadiene

An aromatic compound is a type of organic compound that contains a ring of atoms with alternating double bonds, known as an aromatic ring or an arene. The most common and well-known example of an aromatic compound is benzene, which has a ring of six carbon atoms with alternating double bonds.

Aromatic compounds are characterized by their unique chemical and physical properties, including their stability. They are know to be  planar and lack alkene like reactivity due to enhanced resonance stabilization.

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A compound will not be classified as aromatic if it is not cyclic, planar, or, have a continuous ring of pi electrons that follows Hückel's rule.  

An organic compound would not be classified as an aromatic compound if it does not meet the criteria for being an aromatic compound.

The criteria for being an aromatic compound include being:

If an organic compound is not cyclic or planar, or if it does not have a continuous ring of pi electrons that follows Hückel's rule, then it would not be classified as an aromatic compound.

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In this question, we need to calculate the molarity or the molar concentration of [H+] in a solution that has pOH = 5.33

First, we need to find the pH of this solution, and pH and pOH have a relationship that both values must equal 14:

pH + pOH = 14

pH = 14 - 5.33

pH = 8.67

Now that we have the value of pH, we can find the molar concentration of [H+], using the following formula:

[H+] = 10^-pH

[H+] = 10^-8.67

[H+] = 2.14*10^-9 of molarity or molar concentration

Answer:

Explanation: