What mass of sulphuric acid can be made from 8g of SO3
(SO3+H2O==>H2S04)

09.8g
18.2g

Answer:

All of our energy comes from the sun.

Explanation:

The sun sends out huge amounts of energy through its rays every day. Without the sun, life on earth would not exist, since our planet would be totally frozen.

The mass of the substance is calculated by subtracting the empty graduated cylinder's mass from the mass of the cylinder with the substance: 15.08 g - 12.55 g = 2.53 g.

We subtract the empty graduated cylinder's mass from the substance's mass to find its mass. The empty cylinder weighs 12.55 g, whereas the filled one weighs 15.08 g. 2.53 g separates them.

The graded cylinder's substance added 2.53 g. This calculation assumes the graduated cylinder does not affect measured mass.

The substance's mass (2.53 g) is calculated by subtracting the initial (12.55 g) from the final (15.08 g). This method uses the mass difference before and after adding a substance to a container to measure its mass.

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1 True

2 True

3 True

True. Buffers are solutions that resist changes in pH when small amounts of an acid or base are added to them. However, they are also effective at resisting pH changes when large amounts of an acid or base are added to the solution. Buffers work by using a weak acid and its conjugate base or a weak base and its conjugate acid to neutralize the added acid or base and maintain a relatively constant pH.

True. Chemical buffers play an important role in both industrial production and living systems. In industrial settings, buffers are used in the production of medicines, food and beverages, and other products. In living systems, buffers help maintain the proper pH levels for biological processes to occur. For example, blood contains buffers that regulate the pH and ensure that enzymes and other biological molecules work properly.

True. Chemical buffers have specific ranges and capacities. The buffer capacity is the amount of acid or base that can be added to the solution before the pH changes significantly. A buffer's pH range is the range of pH values over which it can effectively resist changes in pH. The buffer capacity and pH range depend on the concentration of the buffer components and the dissociation constants of the weak acid and weak base used to make the buffer. Buffers with higher concentrations of buffer components and weaker acids or bases have a higher buffer capacity and broader pH range.

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Answer:

0.5moles

Explanation:

Given parameters:

Volume of solution= 0.25L

Molarity of solution = 2.00M

Unknown:

Number of moles  = ?

Solution:

To solve this problem;

  Molarity is the number of moles of solute in a given volume of solution, so

 Number of moles  = molarity x volume

 Now insert the parameters and solve;

  Number of moles  = 0.25 x 2  = 0.5moles

Answer:

b

Explanation:

got it right on test

Therefore, pH equals 1, and the solution is 1.

pH = - log (conc. of H+ ions) because we know that (.10)

pH = - log(1/10)

pH = -(0-1) (0-1)

pH = -(-1) (-1)

hence, pH of.10 M HCL and pH=1.

Answer is one.

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Answer: same concentration

Explanation:

H+ makes it more acidic, OH- makes is more basic. 7 is neutral so it has the same amount of both.

Answer:

400000

Explanation:

First, figure out what 10^5 is. It is 100000. Then multiply it by 4 and there is your answer!

Also if it is 4x10^-5, it is 0.00004!

Oh yeah! If you want it to be in scientific notation, it is: 4x10^5

Since that I didn't quite understand what you are trying to question, it is either 4x10^5 or 4x10^-5!

Answer:

as we know that E= mc²

E= .oo1×(3×10⁸)²

E= .001×9×10¹⁶

we can right .001 =1×10‐³

E=1×10-³×9×10¹⁶

E=9×10¹³

ans is B 9×10¹³

9×10¹³J is the energy that is released if a sample loses 0.001 kg mass through radioactive decay. Therefore, the correct option is option B.

Energy, which is observable in the execution of labor as well as in the form of light and heat, is the quantitative quality that's also transferred to something like a body or to any physical system in physics. Energy can be transformed in form but cannot be created or destroyed, according to the rule of conservation of energy. The joule is the SI's (International System of Units) unit of measurement of energy (J).

A moving object's kinetic energy, an object's potential energy, an object's elastic energy, chemical energy linked to chemical reactions, electromagnetic radiation's radiant energy, and the internal energy of a thermodynamic system are examples of common kinds of energy.

E= mc²

E=0 .001×(3×10⁸)²

E=0.001×9×10¹⁶

E=9×10¹³J

Therefore, the correct option is option B.

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Answer:

116.88g of table salt (NaCl) contains two formula units

Explanation:

Now,

We know that 1 formula unit of sodium chloride has a molar mass of 58.44g/mol

Hence;

Mass of 1 formula unit = 58.44g

Mass of x formula units = 116.88g

x = 116.88g * 1 formula unit/58.44g

x = 2 formula units

Therefore;

116.88g of table salt (NaCl) contains two formula units

Answer:

There are  1.2044 × 10²⁴ formula units of NaCl in 116.88 g of table salt (NaCl)

Explanation:

A formula unit is an empirical formula of the smallest collection or number of atoms in an ionic or covalent combination from which a compounds formula can be established and which are used to represent the compound stoichiometrically

Sodium chloride is an ionic compound and is represented by the formula unit NaCl as it composed of ions and is not therefoe represented by a molecular formula

The given mass of the table salt, NaCl = 116.88 g

The molar mass of NaCl = 58.44 g/mol = The mass of 1 mole of NaCl

1 mole of NaCl contains one Avogadro's number or 6.022 × 10²³ formula units of NaCl,

∴ 58.44 g of NaCl contains 6.022 × 10²³ formula units of NaCl

116.88 g of NaCl will have (116.88/58.44) × 6.022 × 10²³ = 1.2044 × 10²⁴ formula units of NaCl

The number of formula units of NaCl in 116.88 g of table salt (NaCl) =  1.2044 × 10²⁴ formula units of NaCl.

Answer:

Conduction, Convection, and Radiation .......

The temperature of the canister is 311.82(OR 312)K

Given:

volume of canister = 75.0-liter

moles of argon = 15.82 moles

pressure = 546.8 kilopascals

To Find:

temperature of the canister

Solution: Pressure of argon = 546.8 kPa

Conversion factor: 1 atm = 101.325 kPa

According to Ideal gas law,

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature

T = PV/nR = (5.4 atm x 75.0 L) / (15.82 x 0.0821 L.atm.mol-¹K-¹)

T = 311.82 K

Hence the temperature of the canister is 311.82 K.

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Answer:

0.0102 g

Explanation:

A common formula for determining the amount of sample remaining in terms of its half-life is

where

t = 50 000 yr

Calculate n

n = 50 000/5730

n = 8.726

===============

N₀ = 4.30 g Calculate N

N = 4.30 × 2.36 × 10⁻³

N₀ = 0.0102 g

Explanation:

CORRECT THIS ANSWER

MARK A BRAIN LESS ANSWER

CARRY ON LEARNING

1. Constellations are group of stars that form pattems in the night sky

2. Ursa Major, Cassiopeia, and Orion are some common constellations.

3. Stars are used to tell directions and time, predict weather, and to serve as birth sign.

The total of all protons and neutrons is Option D, which is the right response. Protons, neutrons, and electrons are the three fundamental particles that make up an atom.

The nucleus of an atom is made up of protons and neutrons, which are collectively referred to as nucleons and are primarily responsible for an atom's mass. Neutrons weigh 1.6749 x 10-27 kg, whereas protons weigh 1.6726 x 10-27 kg.

Protons and neutrons make up the majority of an atom's mass when added together. However, electrons contribute very little to the mass of the atom due to their much smaller mass of 9.11 x 10-31 kg. As a result, Option D is the right response.

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The CEC for this soil sample is 675.2 cmol(+)/kg.

The % Base Saturation for this soil sample is approximately 136.62%.

The % Acid Saturation for this soil sample is approximately 60.55%.

To    calculate the CEC, % Base Saturation (B.S.), and % Acid Saturation for the given soil sample:

a. Calculation of CEC (Cation Exchange Capacity):

CEC is the sum of exchangeable cations in the soil. From the given results, we have:

CEC = Ca2+ + Mg2+ + K+ + Al3+

CEC = (100 mg/L + 45 mg/L + 85.5 mg/L + 94.2 mg/L) / (25 g / 1000)

CEC = 168.7 mg / (25 g / 1000)

CEC = 675.2 cmol(+)/kg

b. Calculation of % Base Saturation (B.S.):

% B.S. represents the percentage of CEC occupied by base cations. In this case, we consider Ca2+, Mg2+, and K+ as base cations. The formula to calculate % B.S. is:

% B.S. = (Ca2+ + Mg2+ + K+) / CEC * 100

% B.S. = (100 mg/L + 45 mg/L + 85.5 mg/L) / (168.7 cmol(+)/kg) * 100

% B.S. = 230.5 mg / (168.7 cmol(+)/kg) * 100

% B.S. = 136.62%

c. Calculation of % Acid Saturation:

% Acid Saturation represents the percentage of CEC occupied by acid cations, in this case, H+ and Al3+. The formula to calculate % Acid Saturation is:

% Acid Saturation = (H+ + Al3+) / CEC * 100

% Acid Saturation = (8.0 mg/L + 94.2 mg/L) / (168.7 cmol(+)/kg) * 100

% Acid Saturation = 102.2 mg / (168.7 cmol(+)/kg) * 100

% Acid Saturation = 60.55%

Please note that the given values were in milligrams per liter (mg/L), and the CEC and % Saturation values were calculated assuming a conversion from mg/L to cmol(+)/kg using the mass of the soil sample (25 g).

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The landmark in question is the Leaning Tower of Pisa, which took almost 200 years to complete.

Galileo used this tower to conduct his famous experiment, where he dropped two objects of different masses from the top of the tower to prove that the speed of descent was independent of an object's mass. At the time when Viviani asserts that the experiment took place, Galileo had not yet formulated the final version of his law of falling bodies. He had, however, formulated an earlier version which predicted that bodies of the same material falling through the same medium would fall at the same speed. This was contrary to what Aristotle had taught: that heavy objects fall faster than the lighter ones, and in direct proportion to their weight.

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The right response is d. Both enzymes will have the same ΔG for catalysis.

The reaction rate and equilibrium constant have an impact on the Gibbs free energy (ΔG). No matter the source of the enzyme, such as E. coli or a thermophilic microbe, the ΔG for a reaction is the same. As a result, both enzymes will have the same ΔG for sucrose hydrolysis.

The ΔG may be written mathematically as:

ΔG = -RT ln (K)

T is the temperature, K is the equilibrium constant, and R is the gas constant..

As both enzymes have the same reaction rate (K) and temperature (T), the reaction's ΔG  value will likewise be the same.

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Answer:

C. would be the correct option.

Explanation:

Burning gasoline is a chemical change because when gasoline is ignited, water and carbon dioxide are produced. Water freezing to form ice would be a physical change since its state of matter has changed, but not the water itself. Sugar dissolving in water is also a physical change because all it's really doing is just forming bubbles and changing the color. Choice D. would also be a physical change since the piece of metal is still a piece of metal, it just expanded when the temperature increased.

The elements shown have an atomic mass of 20 amu is Neon.

The atomic number of an atom is its total number of protons and neutrons.

Neon has an atomic mass of about 20 this isotope contains 10 protons and 10 neutrons.

Actually, Neon would be listed as having an atomic mass of about 20.18 because of a mixture of isotopes.

Z= Atomic number the number of protons in the nucleus which defines the element.

In this case,  Z=10 and this means neon but there are also 10 neurons in the nucleus of the major isotope which gives it 20Ne.

Hence, option D is the correct answer.

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During dissolution of proteins, the factors that maximize (increase) entropy include an increase in temperature, an increase in the number of molecules in solution, and a decrease in the amount of order in the protein structure.

Additionally, the presence of chaotropic agents, such as urea or guanidinium chloride, can also increase entropy by disrupting the protein's hydrogen bonds and hydrophobic interactions.

Ultimately, maximizing entropy during protein dissolution helps to facilitate the process of protein unfolding and can aid in the purification or analysis of the protein.

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The volume, in milliliters, of the krypton gas is 523ml.

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as

                                    PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

Given,

Mass = 10g

Pressure = 563 mm Hg

Temperature = 298 K

moles of Kr =mass / atomic mass

= 10 / 84

= 0.119 moles

PV = nRT

563 × V = 0.119 × 8.314 × 298

V = 0.523L = 523ml

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Answer:

ocean

Explanation:

because its easy

Celestial objects' light is redshifted.

The redshift of light is caused by the Doppler effect, which occurs when an object is moving away from an observer. As celestial objects move away from Earth, their emitted light waves become stretched, which makes them appear redder. This is known as redshift.

The amount of redshift can be used to determine how fast an object is moving away from us and how far away it is. Redshift is a crucial tool in studying the universe, as it allows astronomers to measure distances to very distant objects and study the expansion of the universe. The observed redshift is consistent with the hypothesis that the universe is expanding.

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Answer:

frequency

Explanation:

Sounds are higher or lower in pitch according to the frequency of vibration of the sound waves producing them. A high frequency (e.g., 880 hertz [Hz; cycles per second]) is perceived as a high pitch and a low frequency (e.g., 55 Hz) as a low pitch.

Explanation:

As the hydrocarbon chain length increases, viscosity increases. As the hydrocarbon chain length increases, flammability decreases. hydrogen in the fuels are oxidised, releasing carbon dioxide, water and energy. The boiling point of the chain depends on its length.

Hopefully this helps! :)

Explanation:

As the hydrocarbon chain length increases, viscosity increases. As the hydrocarbon chain length increases, flammability decreases. hydrogen in the fuels are oxidised, releasing carbon dioxide, water and energy. The boiling point of the chain depends on its length.

The reactions with baking powder and lemon juice is an illustration of either a nuclear reaction that results in a gas (citric acid).

A reaction mechanism is the transformation of one or more chemicals, known as reactants, into one or more new compounds, known as products. Chemical components or compounds make up substances. Synthesis (anabolic), breakdown (catabolic), and exchange are the three primary types of chemical processes that are significant to human physiology.

Baking soda and vinegar or lemon juice react swiftly to generate bubbles when combined. CO₂(g) (carbon dioxide gas) is what creates the bubbles.

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Answer:

4.05g

Explanation:

density = mass / volume

mass = density x volume

mass = 2.7 x 1.5

mass = 4.05