How much work is needed to lift an object that weighs 300N to a height of 5 m?

Use W=F x d

a
1500 J
b
60 J
c
295 J
d
not enough information

In summary, the reaction under standard conditions is exergonic as it releases energy, while the reaction in yeast mitochondria is endergonic as it requires energy for the reaction to proceed.

In order to determine whether a reaction is exergonic or endergonic, we need to understand the concepts of energy release and energy absorption. An exergonic reaction releases energy, while an endergonic reaction requires or absorbs energy.

The reaction under standard conditions can be considered exergonic because it occurs spontaneously and releases energy. Standard conditions typically refer to reactions at a constant temperature of 25 degrees Celsius, a pressure of 1 atmosphere, and reactants and products at standard concentrations.

On the other hand, the reaction occurring in yeast mitochondria is endergonic. This is because the mitochondria require energy to convert reactants into products. In this case, the reactants need to be coupled with an input of energy, such as adenosine triphosphate (ATP), to proceed towards the formation of products.

In summary, the reaction under standard conditions is exergonic as it releases energy, while the reaction in yeast mitochondria is endergonic as it requires energy for the reaction to proceed.

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Answer:

Grand Tourer  Injection

Answer:

I think it has ph level of 7.0

The half-reaction at the anode can be written as:
Anode (oxidation): A → A⁺ + e⁻
And the half-reaction at the cathode can be written as:
Cathode (reduction): B⁺ + e⁻ → B

The cell potential (Ecell) can be calculated using the formula:
Ecell = Ecathode - Eanode= Minimum voltage

In the given electrolytic cell, the anode is the electrode where oxidation occurs and the cathode is the electrode where reduction occurs. The half-reaction at the anode is the oxidation of the anode material, and the half-reaction at the cathode is the reduction of the cathode material.The direction of electron flow is from the anode to the cathode. The anode is negatively charged as electrons are released during oxidation, while the cathode is positively charged as it accepts electrons during reduction.The terminals on the battery are labeled as positive and negative. The positive terminal is connected to the cathode, and the negative terminal is connected to the anode.
To calculate the minimum voltage necessary to drive the reaction, we need to determine the difference in potential between the anode and cathode. This potential difference is known as the cell voltage or electromotive force (EMF). The EMF is equal to the difference in the standard electrode potentials of the half-reactions occurring at the anode and cathode.Once we have the EMF, we can calculate the minimum voltage necessary to drive the reaction using the equation:
minimum voltage = EMF + (overpotential at anode) + (overpotential at cathode)
where the overpotential at the anode and cathode is the additional voltage required to overcome activation energy barriers and losses due to resistance.
In an electrolytic cell, the anode is the electrode where oxidation occurs, and the cathode is the electrode where reduction occurs. Half-reactions at each electrode represent the individual processes of oxidation and reduction.

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Answer:

As the concentration of Sodium Thiosulphate increases the length of time for cross to disappear decreases. This is because the increase of concentration of Sodium Thiosulphate will increase the rate of reaction between Hydrochloric acid and sodium Thiosulphate particles.

Explanation:

Logic...

We calculate the moles of Fe2O3 formed, then use the stoichiometry and given enthalpy of formation to calculate the heat evolved, which is approximately -361.6 kJ. The answer closest to this is option (d) 360.1 kJ.

We use the enthalpy of formation and stoichiometry of the reaction to determine the heat released during the creation of 35.0 g of Fe2O3. Prior to calculating the moles of O2 reacted, we first calculate the moles of Fe2O3 formed. The heat developed is then calculated using the reaction's specified enthalpy of formation. The enthalpy change and the formation of moles of Fe2O3 are the causes of the heat evolution. The closest response is option (d) 360.1 kJ since the enthalpy change is negative, suggesting an exothermic process. As a result, at 25 °C and 1.00 atm of pressure, the reaction produces 361.6 kJ of heat during the creation of 35.0 g of Fe2O3.

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Explanation:

a. i. R and Z (same number of protons but different number of neutrons therefore are isotopes of the same element).

ii. Q (has more portons than electrons).

iii. X (has more electrons than protons).

iv. L (mass number = protons + neutrons).

v. M (belongs to group 1 alkali metals which are of very reactive metals).

b. 12 (atomic number= number of protons).

c. 7 (X has 9 electrons before ionisation, therefore 7 electrons in the outer most shell).

Q (is also from ionisation reaction).

hope it helps :)

A. (i). Two identical atoms with the letters Q and Z each contain 17 protons.

ii. Protons outnumber electrons in a positive ion. R, which has 17 protons and 17 electrons, is the only atom or ion that has more protons than electrons. It removes an electron to form a positive ion with a charge of +1: R+.

iii. In a negative ion, the number of protons is more than the number of electrons. J has 16 electrons and 16 protons, making it the only atom or ion with more electrons than protons. It becomes a negative ion with a charge of -1, or J-, by the addition of one electron.

iv. Such an atom or ion has the letter M and has 11 protons and 12 neutrons. It adds a proton to form an atom with a mass number of 20: N with 12 protons and 8 neutrons.

v. Group 1 of the periodic table consists of metals that are extremely reactive. L, an atom in group 1 with 10 protons, is the only one in the table to have this characteristic.

The fundamental building block of matter, an atom, nevertheless has the characteristics of an element. It consists of a small, compact nucleus with positively charged protons and electrically neutral neutrons surrounded by orbitals of negatively charged electrons.

For the above example,

(b) An atom with an atomic number of 12 has 12 electrons because an atom has exactly the same number of protons in the neutral state as electrons.

(C)

(i) X has exactly 11 protons, the same number of protons as the atom or ion M has. Group 1 of the periodic table, commonly known as the alkali metals, consists of elements with 11 protons.

(ii) An alkali metal is another atom that interacts in the same way as the substance from which ion X is made. According to the table, the only atom in group 1 is L, which has 10 protons. However it lacks the 11 protons of the alkali metals mentioned above

Therefore, two identical atoms with the letters Q and Z each contain 17 protons.

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Answer:

4.22

Explanation:

pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes hydrogen.

pH helps to find the acidity or alkalinity of an aqueous solution.

The number of hydrogen ions (protons) present in a solution is determined by the pH scale.

A pH greater than 7 makes the water more alkaline and a pH less than 7 makes the water more acidic.

\(pH=-\log [H^+]=-\log [0.00006]=4.22\)

The given statement "The mass of a chlorine atom in atomic mass units is approximately 35. The atom has 18 neutrons " is False because The mass number of a chlorine atom is approximately 35 (rounded to the nearest integer), not its atomic mass in atomic mass units.

The atomic mass of chlorine in atomic mass units is about 35.5. This is because the chlorine atom has two isotopes, chlorine-35 and chlorine-37, with atomic masses of approximately 35 and 37, respectively. The atomic mass of an element in atomic mass units is a weighted average of the atomic masses of its isotopes, taking into account their natural abundances.

Therefore, if a chlorine atom has a mass number of 35, it must have 17 neutrons (since the mass number = number of protons + number of neutrons).

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Answer:

See explanation

Explanation:

Oxide has a 2- charge.

Copper (I) Oxide = Cu2O

Copper (II) Oxide = CuO

The formula CuO can not be used to represent both copper I oxide and copper II oxide.

The formula of an ionic compound takes into account the oxidation state and valency of the the metal cation which is usually shown as a Roman numeral in the name of the compound.

For the compound copper I oxide, the correct representation of the compound is Cu2O. This shows that oxygen has a valency of 2 while copper has a valency of 1 in the compound.

The correct representation of copper II oxide is CuO. In the compound, both copper and oxygen have valency of 2.

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Answer: ummm what is this cause I don't get it either

Explanation:

i need help with this to lol

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

Explanation:

HOPE IT HELPS!!!!!

Answer:

Ammonia is a base.

Explanation:

Vinegar, lemon juice, and yogurt all have a pH under 7. If a substances pH is under 7 then it is acidic. If it is above 7 then it is a base. Ammonia has a pH above 7 therefore it is a base.

B- Mechanical digestion begins in the mouth, and includes the tearing and grinding of food with teeth.

C- Mechanical digestion uses teeth to grind food and saliva to moisten the food

making it easier to chew.

These points are true.

Answer:

i dont see the model bro

Explanation:

Answer:

The current model of the atom shows an atom that is mostly empty space. In the center is a small nucleus made of protons and neutrons.

Explanation:

Answer:

the answer is half arrow

Answer:

you siad i can answer with anything :)

Answer:

What do you want answered?

Explanation:

Answer:

Mass = 331.17 g

Explanation:

Given data:

Mass in gram = ?

Number of atoms of K₂SO₄ = 1.18 × 10²⁴ atoms

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

1.18 × 10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms

0.19× 10¹ mol

1.9 mol

Mass of K₂SO₄:

Mass = number of moles × molar mass

Mass = 1.9 mol × 174.3 g/mol

Mass = 331.17 g

Answer:

Nitrogen gas is the limiting reactant

Hydrogen gas is the excess reactant

The theoretical yield is 425 g of ammonia

Explanation:

Equation of reaction: 3H2 + N2 ---> 2NH3

From the equation of reaction, 3 moles of hydrogen gas reacts with 1 mole of nitrogen to produce 2 moles of ammonia gas.

Molar mass of hydrogen gas = 2.0 g

Molar mass of nitrogen gas = 14.0 g

Molar mass of ammonia gas = 17.0 g

Number of moles of hydrogen gas in 250 g = 250/2 = 125 moles

Number of moles of nitrogen gas in 175 g = 175/14 = 12.5 moles

Mole ratio of Hydrogen to Oxygen = 125/12.5 = 10 : 1

Therefore, nitrogen gas is the limiting reactant.

Hydrogen gas is the excess reactant

14 g of nitrogen gas produces 17 × 2 g of ammonia = 34 g of ammonia

175 g will produce (34 × 175)/14 = 425 g of ammonia

Therefore the theoretical yield is 425 g of ammonia

ΔU of the reaction the combustion of compound x is -538 kJ/mol

Combustion is a reaction in which a substance reacts with oxygen gas and releasing energy in the form of light and heat

Here given data is

Mass of compound x = 0.485gram

Mass of water = 3000gram

Temprature rise =  0. 285°C

Heat capacity of the calorimeter = 3. 81 kJ/°C

Specific heat of water =  4. 184 J/g·°C

MW of x = 56. 0 g/mol

Then calculate q

ΔU = ΔH -PΔV

The bomb calorimeter has a constant volume ΔV = 0

ΔU = ΔH

q reaction = q(water + q(bomb)

q(bomb) = 3810J/°C×0.285 = 1085.85J

q(water) = 3000g × 4. 184 J/g·°C×0.285°C = 3577.32 J

q reaction = q(water) + q(bomb)

q reaction = 4663.17 J = 4.66kJ means this is an exothermic

Then calculate moles of compound

Moles = mass/molar mass

Moles = 0.485 g/56.0g/mol

Moles = 0.00866 moles

Then calculate ΔU

ΔU = 4663.17 J/0.00866 moles = 538472 j/mol = 538.5kJ/mol means the reaction is exothermic

ΔU = -538kJ/mol

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The volume of the gold sample containing 1.77x10¹⁹ electrons is approximately 2.51 × 10⁻¹⁸ cm³. This was determined by calculating the mass of the sample first, which was 1.2212 grams, and then using the density of gold to determine the volume.

Assuming that the gold sample is electrically neutral, the number of electrons is equal to the number of protons, which is also the atomic number of gold. Therefore, we can determine the mass of the sample using the atomic weight of gold (196.97 g/mol) and Avogadro's number (6.022 × 10²³ particles/mol):

1.77 × 10¹⁹ electrons x (1 atom Au / 79 electrons) x (196.97 g / 1 mol) x (1 mol / 6.022 × 10²³ atoms) = 4.85 × 10⁻¹⁷ g

Next, we can use the density of gold (19.3 g/cm³) to calculate the volume of the sample:

4.85 × 10 g x (1 cm³ / 19.3 g) = 2.51 × 10⁻¹⁸ cm³

Therefore, the volume of the sample of gold is 2.51 × 10⁻¹⁸ cm³.

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Answer:

\(\huge\boxed{\sf v = 23.73 \ L}\)

Explanation:

Given:

Moles = n = 1 mol

Temp = T = 535 K

Pressure = 1405 mmHg = 1.85 atm

Gas constant = R = 0.09206 L atm K⁻¹ mol⁻¹

Required:

Volume = v = ?

Formula:

Pv = nRT

Solution:

Rearranging formula

\(\displaystyle v = \frac{nRT}{P} \\\\v = \frac{(1)(0.08206)(535)}{1.85} \\\\v = \frac{43.9}{1.85} \\\\v = 23.73 \ L\\\\\rule[225]{225}{2}\)

Answer:

The reaction absorbs energy ( + or exothermic)

Explanation:

When the temperature of a thermometer increases during a chemical reaction, then the reaction absorbs energy (+ or endothermic). Therefore, the correct option is B.

A rise in the temperature of a thermometer during a chemical reaction is a sign that the system is absorbing energy. This implies that the reaction is endothermic, meaning that energy must be supplied for it to proceed. Generally, endothermic reactions take heat from the environment and raise the temperature. Chemical bonds are broken and the process is accelerated by the absorbed energy.

Therefore, the correct option is B.

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