Answer the following questions.
P1) Matching.
Complete the table with the data from the lab. First, calculate and enter the mole ratio in the chart, then enter the volumes of the precipitates.

the answer is Te because O is oxygen.

Answer:

O

Explanation:

this is because it is oxygen

Answer:

Chemical energy

Explanation:

I hope this helped you!

Batteries store the energy in the form of chemical energy that chemical energy is converted into electrical energy. Chemical energy is used to stored in the substances within battery.

The conversion of chemical energy into electrical energy or vice versa is called as electrochemical energy . This includes reactions transferring electrons, redox reactions .

Redox reaction in which reduction and oxidation takes place simultaneously. Reduction, when a substance receives one electron. Oxidation when a substance gives away one electron.

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit.

Thus, chemical energy is used to store in the substance within battery.

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Answer:

True

Explanation:

Competition is the act of competing with one another for a particular resource. An example is two animals quarrelling over a food or two people quarreling over who lost their money. Competing is a type of rivalry in which two people compete for one resource. The answer for this question is True.

The answer is TRUE. Competition is rivalry between individuals for a particular resource

Competition amongst individuals?

Competition can be described as an interaction between two individuals in which they both fight for the available resources in the environment.

For example, when there is limited source of food and water in an environment, the individuals or organisms present will struggle to take the available food in order to survive while those individuals that were unable to get this resource might end up dead as the available food is limited.

This also occurs in plants and they also compete for sunlight, food, water.

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Answer:

A) Ca(s) + C(s) + 3/2 O₂(g) → CaCO₃(s)

Explanation:

Standard enthalpy of formation of a chemical is defined as the change in enthalpy durin the formation of 1 mole of the substance from its constituent elements in their standard states.

The consituent elements of calcium carbonate, CaCO₃, in their standard states (States you will find this pure elements in nature), are:

Ca(s), C(s) and O₂(g)

That means, the equation that represents standard enthalpy of CaCO₃ is:

Is the equation that has ΔH° = -1207kJ/mol

Answer/Explanation:

Animals are multicellular heterotrophic organisms, meaning they cannot generate their own food, they rely on external sources of nutrition.

Protists are any eukaryotic organism that cannot be classified as an animal, plant, or fungus. The grouping is more used for convenience than anything else.

Like animals, animal-like protists can move freely and are heterotrophic. However, unlike animals, they are usually unicellular, and much simpler than animals

The output of glycolysis is pyruvate, but the citric acid cycle uses acetyl CoA. Briefly glycolysis and the citric acid cycle are linked to the results of glycolysis, namely pyruvic acid is converted to acetyl Co-A for the raw material of the citric acid cycle.

Cellular respiration is a complex organic breakdown process at the cellular level that aims to produce ATP that occurs in the mitochondrial matrix. ATP is the energy used by cells to meet their needs in order to carry out various activities. The first stage of cellular respiration is glycolysis. Glycolysis is an energy-releasing reaction that breaks one molecule of glucose into two molecules of pyruvic acid, a NADH and 2 ATP.

The citric acid cycle is a cycle that occurs after glycolysis. In glycolysis, pyruvic acid is produced which is then converted to acetyl Co-A during oxidative decarboxylation. then acetyl co-A is used as raw material for the citric acid cycle to produce 2 ATP, 6 NADH, 2 FADH2, and 4 CO2.

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Answer:

NaOH+HF-------NaF+H2O

1 mole Of HF=1mole of NaF

3mole HF= X

X=3mole of NaF

Answer:

Molecules contained in a liquid evaporate from the surface area. This means that the larger the surface area, the faster the rate of evaporation. ... This means all the other factors that affect the rate of evaporation are identical. Leave the containers for one hour.

Explanation:

Answer:

Evaporation would accelerate.

Explanation:

Direct sunlight increases the thermal energy on the containers, increasing evaporation.

(d) greenhouse effect

Answer:

B. X represents phosphorus

Explanation:

In an isotope symbol, you write the mass number above the atomic number. So the 31 represents the mass of the protons and neutrons of the element added together, and the 15 represents the atomic number or the total number of protons in the nucleus.

The remaining reactant (Aluminum Hydroxide) weighs approximately 11.73 g.

Hence, Option A is correct.

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1.00mol is the correct answer

Answer:

aqueous solutions of silver nitrate and sodium chloride turn cloudy after mixing aqueous solutions of hydrochloric acid and sodium hydrogen carbonate produces bubbles on mixing Sodium hydroxide is mixed with water and the container feels warmer

Explanation:

A chemical change involves the formation of new substances. Also heat is absorbed or released in a chemical change. Another name for a chemical change is a chemical reaction.

In the first case, a reaction of the sort;

AgNO3(aq) + NaCl(aq) ---> AgCl(s) + NaNO3(aq)

The cloudy solution is due to the formation of AgCl precipitate.

In the second case, a reaction of the sort;

HCl(aq) + NaHCO3(aq) ---> NaCl(aq) + CO2(g) + H2O(l)

The gas evolved is due to the formation of CO2 in the process. Heat is also evolved showing that it is a chemical change.

Explanation:

¿Cuál es la carga compuesta para el fosfuro de Aluminum phosphide is a chemical compound with the formula AlP; Phosphine gas generator which is extremely toxic to any living being. estroncio?

Answer:

An increase in temperature will result in increase in the average kinetic energy of the reacting particles(atoms). Which will therefore increase the frequency of their collision....

Using collision theory

The reaction rate increases......

Based on the information provided, the decrease in temperature and the formation of a white substance suggest a chemical reaction took place. The temperature decrease indicates an exothermic reaction, where heat is released.

The white substance forming and settling to the bottom is likely a precipitate, indicating a precipitation reaction occurred. This occurs when two solutions are combined and a solid substance is formed. The specific reaction and white substance cannot be determined without further information. It is important to note that the change in temperature and the formation of a precipitate are typical indicators of a chemical reaction.

However, a thorough analysis of the reactants and conditions is necessary for a precise identification. Please provide additional details if available.

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Water and carbon dioxide combine to induce carbonic acid, which is catalyzed by carbonic anhydrase.

A family of enzymes known as carbonic anhydrases catalysis the interconversion of carbon dioxide and water with carbonic acid's separated ions. utmost carbonic anhydrases have a zinc ion in their active point. As a result, they're categorised as metalloenzymes.

Because carbonic acid is the sole acid that's exhaled by mortal lungs in a gassy state, it's constantly appertained to as a respiratory acid. It's a weak acid that produces bicarbonate and carbonate mariners.

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In binary search, the list elements are compared based on their order. To find which list elements will be compared to the key 27 using binary search, we need to consider the order in which the elements are checked. Binary search works by repeatedly dividing the list in half, so the elements that are compared are the ones in the middle of each division.

Assuming the list is already sorted in ascending order, the comparison process will be as follows:
1. Start with the whole list.
2. Compare the middle element with the key 27.
3. If the middle element is equal to the key, we're done.
4. If the middle element is greater than the key, repeat the process with the left half of the list.
5. If the middle element is less than the key, repeat the process with the right half of the list.
6. Repeat steps 2-5 until the key is found or the list is exhausted.
Based on this process, the elements that will be compared to the key 27 using binary search will be the middle elements at each division until the key is found or the list is exhausted.

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The percentage yield of water, H₂O obtained from the reaction is 64.3%

We'll begin by writing the balanced equation for the reaction. This is given below:

Molar mass of CH₄ = 12 + (4×1) = 16 g/mol

Mass of CH₄ from the balanced equation = 1 × 16 = 16 g

Molar mass of O₂ = 2 × 16 = 32 g/mol

Mass of O₂ from the balanced equation = 2 × 32 = 64 g

Molar mass of H₂O = (2×1) + 16 = 18 g/mol

Mass of H₂O from the balanced equation = 2 × 18 = 36 g

From the balanced equation above,

16 g of CH₄ reacted with 64 g of O₂ to produce 36 g of H₂O

From the balanced equation above,

16 g of CH₄ reacted with 64 g of O₂.

Therefore,

8.75 g of CH₄ will react with = (8.75 × 64)/16 = 35 g of O₂

From the calculation made above, we can see that a higher amount of O₂ (i.e 35 g) than what was given (i.e 18.95 g) is needed to react with 8.75 g of CH₄.

Therefore, O₂ is the limiting reactant and CH₄ is the excess reactant.

From the balanced equation above,

64 g of O₂ reacted to produce 36 g of H₂O.

Therefore,

18.95 g of O₂ will react to produce = (18.95 × 36)/64 = 10.66 g of H₂O.

Thus, the theoretical yield of H₂O is 10.66 g

Actual yield of H₂O = 6.85 g

Theoretical yield of H₂O = 10.66 g

\(Percentage yield = \frac{Actual}{Theoretical} * 100\\\\= \frac{6.85}{10.66} * 100\\\\\)

Therefore, the percentage yield of H₂O is 64.3%

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The amount of millimoles of solid naoh that must be added to 50.0 milliliters is: 5.0 mmol of NaOH.

The [H+] at pH 7.49 is:

[H+] = 10–^7.49

[H+]= 3.24×10–^8 M

And when the solution is half-neutralized pH will be:

pH = pKa while  [OCl– ]÷[HOCl] = 1

Now let find the millimoles of solid naoh:

0.20 mol HOCl÷1 L× 50.0 mL

= 10.0 mmol HOCl

Half of 10.0 mmol HOCl will be added

Millimoles of solid naoh=10.0 mmol HOCl÷2

Millimoles of solid naoh= 5.0 mmol of NaOH

Inconclusion the amount of millimoles of solid naoh that must be added to 50.0 milliliters is: 5.0 mmol of NaOH.

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Answer:

the blanket let's him slide it across the floor because the has less friction with the floor than the furniture.

Answer:

Blanket underneath the furniture may reduce the kinetic friction

Explanation:

When sliding an object across a surface, the force of kinetic friction will oppose the movement of the object.

By placing a blanket between the object and the surface, the kinetic friction coefficient may be reduced.

Therefore, putting a blanket underneath the furniture may reduce the kinetic friction coefficient, then making it easier to slide the forniture.

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A fellow mate,

Cheers !

When accurately a value is measured indicates how near it is to the true value. If, for instance, you measure a substance's density to be 1.24 g/mL, and it has a density of 1.23 g/mL, you were accurate. The variation between the accepted value and the empirically measured value is incredibly tiny.

The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol, however the Latin letter D may also be used.

The density of a substance is determined by the mass, size, and arrangement of its atoms. Density (D) is defined as the product of a substance's mass and volume. Differing densities apply to objects having the same volume but different masses.

The true or accurate value of a measurement is one that is based on widespread agreement with an authoritative reference. The acceptable density for aluminum is 2.70g/cm3. A measurement's experimental value is its value as it is observed during the experiment.

Thus,The variation between the accepted density and the empirically measured density is incredibly tiny.

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Answer:  A pressure of 0.681 atm would be exerted by 0.023 grams of oxygen \((O_2)\) if it occupies 31.6 mL at \(91^{o}C\).

Explanation:

Given : Mass of oxygen = 0.023 g

Volume = 31.6 mL

Convert mL into L as follows.

\(1 mL = 0.001 L\\31.6 mL = 31.6 mL \times \frac{0.001 L}{1 mL}\\= 0.0316 L\)

Temperature = \(91^{o}C = (91 + 273) K = 364 K\)

As molar mass of \(O_2\) is 32 g/mol. Hence, the number of moles of \(O_2\) are calculated as follows.

\(No. of moles = \frac{mass}{molar mass}\\= \frac{0.023 g}{32 g/mol}\\= 0.00072 mol\)

Using the ideal gas equation calculate the pressure exerted by given gas as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the value into above formula as follows.

\(PV = nRT\\P \times 0.0316 L = 0.00072 mol \times 0.0821 L atm/mol K \times 364 K\\P = \frac{0.00072 mol \times 0.0821 L atm/mol K \times 364 K}{0.0316 L}\\= 0.681 atm\)

Thus, we can conclude that a pressure of 0.681 atm would be exerted by 0.023 grams of oxygen \((O_2)\) if it occupies 31.6 mL at \(91^{o}C\).

"Amphipathic" refers to the property of a molecule having both hydrophilic (water-loving) and hydrophobic (water-repelling) regions. Soap molecules are a classic example of amphipathic molecules.

The amphipathic nature of soap molecules makes them effective cleaning agents because they can interact with both water and nonpolar substances like oils and grease. The hydrophilic "head" of the soap molecule is attracted to water and readily dissolves in it, while the hydrophobic "tail" is repelled by water but attracted to nonpolar substances.When soap is mixed with water, the hydrophilic heads surround and form bonds with water molecules, creating structures called micelles. The hydrophobic tails of the soap molecules are then oriented towards the center of the micelle, away from the water. This arrangement allows the micelles to trap and suspend nonpolar substances, such as oil or grease, within their hydrophobic cores. As a result, when soap is applied to a dirty surface or skin, the hydrophobic tails of the soap molecules interact with and surround the nonpolar dirt or oil, while the hydrophilic heads remain in contact with the water. This enables the soap to emulsify the nonpolar substances and lift them away from the surface, allowing them to be rinsed away with water. The amphipathic nature of soap molecules thus facilitates the removal of dirt and oil, making them effective cleaning agents.

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Answer:

1 grams Cobalt(II) Sulfate = 0.006451787725861 mole using the molecular weight calculator and the molar mass of CoSO4.

Explanation:

Answer:

b a c a b

Explanation:

At constant temperatures, the simplest approach to reduce the volume of a gas is to raise its pressure. So, at 700 bar, or 700 times normal atmospheric pressure, hydrogen has a density of 42 kg/m3, compared to 0.090 kg/m3 at normal pressure and temperature.

Hydrogen decreases metal oxides in the reactivity series below. That is, hydrogen can only decrease the oxides of metals that are less reactive than hydrogen itself.

High-Temperature Water Splitting: Chemical processes that split water to make hydrogen are fueled by high temperatures generated by solar concentrators or nuclear reactors.

The oxidation number of hydrogen gas is 0, but the oxidation state of hydrogen atoms in water is +1. As a result, the hydrogen atom has been oxidized. It acts as a reducing agent.

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A hammer strikes a compound formed by covalent bonds, It will break into many pieces. Therefore, option A is correct.

An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs. Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.

Atoms join together in a covalent bond by exchanging electrons. Nonmetals typically form covalent connections with one another. For instance, each hydrogen (H) and oxygen (O) atom in water (H2O) shares a pair of electrons to form the molecule of two single-bonded hydrogen atoms and one single-bonded oxygen atom.

Thus, option A is correct.

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