a brittle white crystalline solid has a melting point of 760 c and reacts when added to water. this substance is most likely what type of solid

Answer:

47.36mL

Explanation:

Using Boyles law equation, which states that:

P1V1 = P2V2

Where;

V1 = initial volume (mL)

V2 = final volume (mL)

P1 = initial pressure (atm)

P2 = final pressure (atm)

Based on the provided information, V1 = 25.3mL, P1 = 152 kPa, V2 = ?, P2 = 0.804atm

First, we need to convert 152kPa to atm by dividing by 101

1kPa = 0.0099atm

152kPa = 1.505atm

P1V1 = P2V2

1.505 × 25.3 = 0.804 × V2

38.08 = 0.804V2

V2 = 38.08/0.804

V2 = 47.36mL

panjang banget gua kaga ngerti

Answer:

Answer 1- option c they have light and hollow bones

Answer2-ascaris

Answer 3-¿????

Answer 4th

Answer: We have 10.0g of carbon disulfide. So the amount of Carbon Dioxide produced from 10.0g of Carbon Disulfide is 5.77g

Explanation:

GIVEN: 10.0g of Carbon Disulfide

On balancing the equation we get,

CS₂ + 3O₂ = CO₂ + 2SO₂

Molar Mass of CS₂= 76.14 g/mol   (Approx)

Molar Mass of CO₂= 44.01 g/mol   (Approx)

From the above equation, we can conclude that 1 mole of CS₂ produces

1 mole of CO₂.

On calculating the number of moles of CS₂ we get,

No. of moles of CS₂= Mass / Molar Mass

No. of moles of CS₂= 10 g/ 76.14 g/mol      

No. of moles of CS₂= 0.1313 mol   (Approx)    

The mole ratio of CS₂:CO₂ is 1:1

No. of moles of CO₂= 0.1313 mol   (Approx)          

Mass of CO₂=  0.1313 mol *44.01 g/mol =5.77g (Approx)

Hence

Mass of CO₂=  0.1313 mol *44.01 g/mol =5.77g (Approx)

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Answer:

because they possess the same number of electron at their outermost shell

By taking into account the different numbers of sodium ions released by different salts upon dissociation, we can calculate that the final molarity of sodium salts is 0.1055 M.

To calculate the total molarity of the sodium ions in the new solution, we must calculate the number of moles of sodium ions in the first, second, and third solutions, add them up and divide them by the total volume of the new solution.

First solution - 1 mol of sodium chloride releases 1 mole of sodium ions upon dissociation, so the amount of sodium ions will be equal to the amount of sodium chloride:

c = n/V ⇒ n = c*V = 1.25 M * 0.0250 L = 0.03125 mol

Second solution - 1 mol of sodium sulfate releases 2 moles of sodium ions upon dissociation, so the amount of sodium ions will be double the amount of sodium sulfate:

n = 2c*V = 2 * 0.550 M * 0.145 L = 0.1595 mol

Third solution - 1 mol of sodium phosphate releases 3 moles of sodium ions upon dissociation, so the amount of sodium ions will be triple the amount of sodium phosphate:

n = 3c*V = 3 * 0.225 M * 0.0300 L = 0.02025 mol

The final molarity of sodium ions:

c = n/V = (0.03125 mol + 0.1595 mol + 0.02025 mol) / (0.0250 L + 0.145 L + 0.0300 L) = 1.055 M

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Answer:

a) A subtance that increase H3O+ concentration when it is dissolved in water.

Explanation:

Arrhenius acid: any species that increases the concentration of H+ ions (or protons) in an aqueous solution.

Arrhenius base: any species that increses the concentration of OH- in an aqueous solution.

Brønsted-Lowry acid:  any species that donates protons.  

Brønsted-Lowry base: any species that is accepts protons.

If an electric motor in a vacuum cleaner uses 300 J of energy every second and wastes 60 J of energy every second, the amount of useful energy transferred per second would be 240 J.

The useful energy of a system or a machine is the amount of energy put into actual work as opposed to the total amount of energy input into the system or machine.

The measure of the useful energy relative to the total energy input in a system is known as the efficiency of the system.

In this case, the total energy being used by the electric motor of the vacuum cleaner is 300 j every second. However, out of this total, 60 J is wasted as heat every second.

Thus, the total amount of useful energy of the vacuum cleaner per second would be:

300 - 60 = 240 J

In other words, 240 J of useful energy is transferred every second in the electric motor of the vacuum cleaner.

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2.50 g of helium gas at STP would occupy a volume of 14.0 liters.

Standard temperature and pressure (STP) conditions of 0°C and 1 atm, we can use the molar volume of a gas at STP, which is 22.4 L/mol.

1. Helium seems to have a molar mass of 4.00 g/mol.

Therefore, we can calculate the number of moles of helium as:

moles of He = mass of He divided by molar mass of He

= 2.50 g / 4.00 g/mol

= 0.625 mol

Then, we can use the molar volume of a gas at STP to calculate the volume of helium gas:

volume of He = moles of He x molar volume of gas at STP

= 0.625 mol x 22.4 L/mol

= 14.0 L

2.50 g of helium gas at STP would occupy a volume of 14.0 liters.

2. The molar mass of sodium is 22.99 g/mol. Therefore, we can calculate the number of moles of sodium as:

moles of Na = number of atoms of Na divided by Avogadro's number

= 5.0 x 10²⁵ atoms / 6.022 x 10²³ atoms/mol

= 83.0 mol

Then, we can use the molar mass of sodium to calculate the mass of sodium:

mass of Na = moles of Na x molar mass of Na

= 83.0 mol x 22.99 g/mol

= 1900 g

Therefore, 5.0 x 10²⁵ atoms of sodium have a mass of 1900 g.

3. The molar mass of Ni is 58.69 g/mol. Therefore, we can calculate the number of moles of Ni as:

moles of Ni = mass of Ni divided by molar mass of Ni

= 3.95 g / 58.69 g/mol

= 0.0673 mol

Then, we can use Avogadro's number to calculate the number of atoms of Ni:

number of atoms of Ni = moles of Ni x Avogadro's number

= 0.0673 mol x 6.022 x 10²³ atoms/mol

= 4.05 x 10²² atoms

Therefore, 3.95 g of Ni contain 4.05 x 10²² atoms.

4. The molar mass of Xe is 131.29 g/mol. Therefore, we can calculate the number of moles of Xe as:

moles of Xe = mass of Xe divided by molar mass of Xe

= 15 kg / 131.29 g/mol

= 114 mol

Then, we can use Avogadro's number to calculate the number of atoms of Xe:

number of atoms of Xe = moles of Xe x Avogadro's number

= 114 mol x 6.022 x 10^23 atoms/mol

= 6.87 x10²⁵ atoms

Therefore, a 15 kg sample of Xe gas contains 6.87 x 10²⁵ atoms.

5. A gas's molar volume at STP is 22.4 L/mol. Therefore, we can calculate the number of moles of Ar as:

moles of Ar = number of atoms of Ar divided by Avogadro's number

= 45,000,000 atoms / 6.022 x 10²³ atoms/mol

= 7.47 x 10⁻¹⁷ mol

Then, we can use the molar volume of a gas at STP to calculate the volume of Ar gas:

volume of Ar = moles of Ar x molar volume of gas at STP

= 7.47 x 10⁻¹⁷ mol x 22.4 L/mol

= 1.67 x  10⁻¹⁵ L

Therefore, 45,000,000 atoms of Ar would occupy a volume of 1.67 x 10⁻¹⁵ liters at STP.

6. The molar mass of CO₂ is 44.01 g/mol. Therefore, we can calculate the number of moles of CO₂ as:

moles of CO₂ = mass of CO₂ divided by molar mass of CO₂

= 75 g / 44.01 g/mol

= 1.70 mol

Then, we can use Avogadro's number to calculate the number of atoms of CO₂:

number of atoms of CO₂ = moles of CO₂ x Avogadro's number

= 1.70 mol x 6.022 x 10²³ atoms/mol

= 1.02 x 10²⁴ atoms

Therefore, a 75 g sample of CO₂ contains 1.02 x 10²⁴ atoms.

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With 250 ml of 0.062 m ba,1.778 × 10⁻³ grams of baco3 will dissolve (no3) 2. Baco3 has a ksp of 8.12 10⁻⁹.

To solve this problem, we can use the solubility product constant (Ksp) expression for BaCO3:

Ksp = [Ba2+][CO32-]

We can assume that Ba(NO3)2 is a soluble salt and dissociates completely in water to give Ba2+ and NO3- ions. Therefore, the initial concentration of Ba2+ is:

[Ba2+] = 2 × 0.062 mol/L = 0.124 mol/L

Assuming x moles of BaCO3 dissolves in 250 mL of Ba(NO3)2 solution, the equilibrium concentrations of Ba2+ and CO32- can be expressed in terms of x as:

[Ba2+] = 0.124 mol/L + x

[CO32-] = x

Substituting these concentrations into the Ksp expression and solving for x:

Ksp = [Ba2+][CO32-]

8.12 × 10⁻⁹  = (0.124 + x)(x)

x² + 0.124x - 8.12 × 10⁻⁹ = 0

Solving this quadratic equation for x, we get:

x = 9.011 × 10⁻⁶  mol

The mass of BaCO3 that dissolves in 250 mL of Ba(NO3)2 solution is given by:

mass = moles × molar mass

mass = 9.011 × 10⁻⁶ mol × 197.34 g/mol (molar mass of BaCO3)

mass = 1.778 × 10⁻³ g

Therefore, approximately 1.778 milligrams of BaCO3 will dissolve in 250 mL of 0.062 M Ba(NO3)2 solution at equilibrium.

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Metallic Minerals will be minerals in which metal components are available in their crude structure. Non-metallic minerals don't contain any metal substances in them. At the point when metallic minerals are dissolved another item is shaped. Non-metallic minerals are frequently discovered installed in youthful overlay mountains and sedimentary rocks.

Answer:

23,31 atm

Explanation:

p1v1 = p2v2

2.3 * 300  = p2 *29.6

p2=23.31 atm

Absorbance is measured using a spectrophotometer or microplate reader, which is an instrument that shines light of a specified wavelength through a sample and measures the amount of light that the sample absorbs.

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1. Ensure Clear and Visible Placement: Machine controls should be located in a position that is easily accessible, visible, and within reach of the equipment operator. Clear and intuitive labeling or color-coding can also be used to enhance visibility and assist in identifying the controls quickly.

2. Provide Adequate Guarding: The machine controls should be positioned in a manner that minimizes the risk of accidental activation or unintended operation. This can be achieved by incorporating appropriate guarding or barriers around the controls to prevent inadvertent contact or interference.

3. Consider Ergonomics and Operator Comfort: When determining the location of machine controls, it is essential to consider ergonomic principles and operator comfort. Controls should be positioned in a way that allows operators to maintain a comfortable and natural posture while operating the equipment. This can help reduce the risk of operator fatigue, musculoskeletal disorders, and errors due to discomfort or awkward reach.

These rules aim to promote operator safety, minimize the potential for accidents, and ensure efficient and effective control of equipment involving fluid power components.

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If we add a much larger excess of t-butyl alcohol to the benzene ring in highlighted positions continue then ther will be no further friedel crafts alkylation would continue to occur due to stric hindrance.

First step is aromatic electrophilic substitution. As present in above first figure. The above product result is more expected because these positions are more electron rech. Second step, as we know ortho and para position are more reactive when one OCH₃ group in conjugation, similar for next OCH₃group. In both of reaction the ortho position, of OCH₃ is more electron dense. The last step of Reactions present in above figure.

The further addition of bulky groups, t-butyl groups to the benzene ring to highlighted positions would not continue the friedel crafts alkylation.

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Answer:

Fossil fuels, such as coal, oil, or natural gas, release carbon back into the atmosphere.

The processes would be decomposition, diffusion, erosion, respiration, and combustion.

Explanation:

Hope this helped?

The names of the compounds differ by the type of metal present in them, which are Calcium (Ca) and Cadmium (Cd)

From the question,

We are to determine the how the name of CaS differ from the name of CdS

First, we will determine the identities of the elements in the given compounds

Ca represents calcium

and

S represents sulfur

∴ The compound is named Calcium sulfide

Cd represents the element Cadmium

and

S represent the element Sulfur

∴ The compound is named Cadmium sulfide

Hence, the names of the compounds differ by the type of metal present in them, which are Calcium (Ca) and Cadmium (Cd)

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The difference in kinetic energy if a 6 kg bowling ball rolling at 16 mph and when it is rolling at 14 mph is 180J.

Kinetic energy of an object can be calculated using the following formula;

K.E = ½mv²

Where;

According to this question, a 6 kg bowling ball is rolling at 16 mph and 14 mph respectively.

K.E = (½ × 6 × 16²) - (½ × 6 × 14²)

K.E = 768 - 588

∆K.E = 180J

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As the number of methyl groups increases, the extent of hydration decreases due to steric hindrance.

Because of steric hindrance, the degree of hydration reduces as the number of methyl groups rises. The larger the level of hydration, the better the ion stability and the basic strength of amine. The lone pairings that share a proton are found on C, N, O, and F. Carbon is the least electronegative (most eager to share electrons) of them, hence -CH3 (methide ion) is the most powerful base.

Methoxide (methoxide ion; MeO-): CH3O-; methanol’s conjugate base. A strong base that is also an excellent nucleophile (it is widely employed in E2 and enolate reactions).

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Baking soda neutralizes the acid so D

Baking soda is a weak base and will neutralize the acid.

Explanation:

       \(NaHCO_3+HA\rightarrow NaA+H_2O+CO_2\)

        (Where: HA is the general formula of an acid)

That is why the baking soda is present in the acid spill kits. So from this, we can conclude that the correct answer is option D.

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Answer:

In chemistry, a product is a substance that is formed as the result of a chemical reaction. In a reaction, starting materials called reactants interact with each other.

Explanation:

Answer:

Natural selection says that either they evolve differently and increase their biodiversity or they die. Both wouldn't have enough food to survive so animals with those traits would become less and less common. ... Natural Selection can also decrease the biodiversity.

Answer: Increase their biodiversity or they die

Explanation:

Both wouldn't have enough food to survive so animals with those traits would become less and less common. ... Natural Selection can also decrease the biodiversity.

Answer:

Position

Explanation:

Answer:

I wanna  say C.

Explanation:

Answer:

Explanation

7 tonnes-8.5 ammonia

1 ton will be 8.5/7=1.21

we now know what 1 ton of nitrogen is equal to

so now,34/28 that is equal to 1.21

1.21=1.21

So the answer would be C. 28 tonnes

Thanks!

Answered by: FieryAnswererGT

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When discussing a job agency and its reliability, a conversation between friends may touch on several aspects of the agency's services. They might consider the agency's reputation within the industry, the quality of the jobs the agency offers, and the level of support they provide to job seekers.

The agency's reputation, screening process, communication, and track record, the conversation might also touch on other factors that can affect an agency's reliability. These may include the types of industries and job roles the agency specializes in, the geographic region it serves and the fees it charges for its services.

If the agency primarily focuses on entry-level jobs or temporary positions, it may not be the best fit for job seekers looking for long-term career growth. If the agency only operates in a specific region or industry, it may not be able to offer the same level of job opportunities as larger agencies with a broader reach.

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Magnesium and fluorine atoms will most likely form an ionic bond.

Ionic bonds are formed between elements with a large difference in electronegativity, which is the measure of an atom's ability to attract electrons towards itself. Magnesium and fluorine have a difference in electronegativity of 2.13, which is large enough to form an ionic bond.

In ionic bonds, one atom loses electrons and becomes a positively charged ion (cation), while the other atom gains electrons and becomes a negatively charged ion (anion). In this case, magnesium will lose two electrons to become Mg2+ and fluorine will gain one electron to become F-. These two ions will then attract each other electrostatically to form magnesium fluoride (MgF2), which is an ionic compound.

On the other hand, covalent bonds are formed between elements with a small difference in electronegativity, where atoms share electrons to achieve a stable electron configuration. Magnesium and fluorine have a large electronegativity difference, so they are unlikely to share electrons and form a covalent bond. Therefore, magnesium and fluorine will most likely form an ionic bond.

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Answer:When the pendulum reaches the very bottom of the swing, it is at its lowest point and greatest speed. This means that the pendulum has zero potential energy (with respect to its rest position) and maximum kinetic energy. This pattern continues for the rest of the swings.

Explanation: Hopes this helps make as brainliest

The correct statement is d. The number of molecules with enough energy to react is greater at 80oC.

This is due to the fact that at higher temperatures, the molecules of N2O4 possess more kinetic energy which increases the frequency of collisions and the proportion of molecules that exceed the activation energy required for the reaction to occur.

As a result, the rate of the reaction increases at higher temperatures. The activation energy of a reaction is the minimum energy required for a chemical reaction to occur, but it remains constant regardless of the temperature. Therefore, options a and b are incorrect.

Option c is also incorrect as the concentration of the gas does not increase with temperature, but its pressure does.

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Answer:nope nope

Explanation:just no

Answer:

A water turbine is used to convert the energy contained in water, potential energy or kinetic energy, into mechanical or electrical energy. There are two types of water turbines, the reaction water turbine, and the impulse water turbine.

Explanation:

Answer:

Water turbines are used to take energy whether it may be kinetic or potential from the water and convert that energy into mechanical, or electrical energy.

Explanation: