What water temperature is comfortable for swimming.

The observation, in this case, is quantitative.

Quantitative observations are observations that can be recorded based on quantitative data. In other words, they are observations that can be assigned numerical values.

Quantitative observations are as opposed to qualitative observations because the former cannot be assigned numerical values. They can be ranked or qualified.

In this case, Danielle and Heather could assign numbers to the length, width, and height of the tank in order to calculate its volume.

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Answer:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

Explanation:

Answer:

Photosynthesis is the process in which light energy

Explanation:

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Carbon dioxide,Ammonia,Oxygen,Water,Hydrogen fluoride,Nitrogen are the polarity of 6 real molecules

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Answer:

color

Explanation:

The effective temperature is directly related to the color of the star: the higher the temperature, the bluer the light emitted by the star.

Answer:

If a one kilogram block of lead absorbs 2,000 J of energy then the temperature rise will be larger. If 1,000 J of heat is absorbed by a 2 kg block of lead then the temperature of the block doesn't rise as much since the energy is shared between more particles.

Explanation:

Taking into account the Charles' law, the temperature of the gas if the volume drops to 75.0 L is 246 K or -27 C.

Charles' law establishes the relationship between the temperature and the volume of a gas when the pressure is constant. This law says that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases. That is, the volume is directly proportional to the temperature of the gas.

Mathematically, Charles' law is a law that says that when the amount of gas and pressure remain constant, the ratio between volume and temperature will always have the same value:

\(\frac{V}{T}=k\)

Considering an initial state 1 and a final state 2, it is fulfilled:

\(\frac{V1}{T1}=\frac{V2}{T2}\)

In this case, you know:

Replacing in Charles's law:

\(\frac{100 L}{328 K}=\frac{75 L}{T2}\)

Solving:

\(T2x\frac{100 L}{328 K}=75 L\)

\(T2=\frac{75 L}{\frac{100 L}{328 K}}\)

T2= 246 K= -27 C

Finally, the temperature of the gas if the volume drops to 75.0 L is 246 K or -27 C.

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Answer:

the answer is d.

1. Write the symbols for each element.

2. Find the charge for each element using the Periodic Table. Write it above each element. (because there is a (III) after nickel, the charge of nickel is +3. oxygen is in group 16, which means it has a -2 charge.)

3. See if the charges are balanced (if they are you're done!)

- when you criss cross (getting Ni2O3, the charges are canceled out, so the equation is balanced.

if you still need help or if this is confusing, look up How to Write the Formula for Nickel (III) oxide  by Wayne Breslyn on YT.

Answer:

D.) Ni2O3

Explanation:

edge 2021 (just needed the daily answer)

The synthesis reaction of Br2(g) with Al(s), Ba(s), Ag(s), and Na(s) are as follows:Br2(g) + 2 Al(s) → 2 AlBr3(s)3 Br2(g) + Ba(s) → BaBr6(s)2 Ag(s) + Br2(g) → 2 AgBr(s)2 Na(s) + Br2(g) → 2 NaBr(s)

Balanced equation for the synthesis reaction of Br2(g) with Al(s), Ba(s), Ag(s), and Na(s)Br2(g) + 2 Al(s) → 2 AlBr3(s) 3 Br2(g) + Ba(s) → BaBr6(s) 2 Ag(s) + Br2(g) → 2 AgBr(s) 2 Na(s) + Br2(g) → 2 NaBr(s)The synthesis reaction of Br2(g) can be carried out using different metals such as Al(s), Ba(s), Ag(s), and Na(s). The balanced chemical equation for the reaction will be based on the type of metal used. However, all of the reactions will produce a metal bromide salt.The first equation represents the reaction of Br2(g) with aluminum. This reaction results in the formation of aluminum tribromide salt. The balanced chemical equation for the reaction is as follows:Br2(g) + 2 Al(s) → 2 AlBr3(s)The second equation represents the reaction of Br2(g) with barium. This reaction results in the formation of barium hexabromide salt. The balanced chemical equation for the reaction is as follows:3 Br2(g) + Ba(s) → BaBr6(s)The third equation represents the reaction of Br2(g) with silver. This reaction results in the formation of silver bromide salt. The balanced chemical equation for the reaction is as follows:2 Ag(s) + Br2(g) → 2 AgBr(s)The fourth equation represents the reaction of Br2(g) with sodium. This reaction results in the formation of sodium bromide salt. The balanced chemical equation for the reaction is as follows:2 Na(s) + Br2(g) → 2 NaBr(s)In conclusion, the balanced chemical equations for

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Answer:

Climate

Explanation:

When 535) of heat is added to 8.5g of cooking oil at 22°C, the temperature increases to 79°C, 0.797 J/g°C is the specific heat of the cooking oil.

The amount of heat needed to increase a substance's temperature by one degree Celsius in one gram, also known as specific heat.

According to the definition, a material's specific heat capacity is normally calculated by measuring the heat capacity of a sample of the substance, commonly using a calorimeter, and dividing by the sample's mass.

Given that,

Heat absorbed (Q) = 535 J

Mass = 8.5 gm

Change in temperature (ΔT) = 79°C

Now, Specific heat (S) is given by the formula:

S = Q/(m × ΔT)

or, S = 535 J/ (8.5 gm × 79°C)

or, S = 0.797 J/g°C.

Thus, 0.797 J/g°C is the specific heat of the cooking oil.

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The amount of excess acetic anhydride is:Amount of excess acetic anhydride = initial amount - amount used = 0.0196 mol - 0.0145 mol = 0.0051 molTherefore, 0.0051 mol of acetic anhydride is used in the reaction.

The balanced chemical equation for the reaction of salicylic acid with acetic anhydride is given as follows: 2C7H6O3 + C4H6O3 ⟶ 2C9H8O4 + H2OIn this equation, salicylic acid (C7H6O3) is the limiting reagent and acetic anhydride (C4H6O3) is the excess reagent. The stoichiometric ratio between salicylic acid and acetic anhydride is 2:1. This means that for every two moles of salicylic acid, one mole of acetic anhydride is required. To find out how much of the excess reactant is used when the reaction is complete, we need to determine the limiting reagent and the excess reagent. We can do this by calculating the amount of product that each reactant can produce and comparing the values.Let's first calculate the number of moles of each reactant:No. of moles of salicylic acid = mass/molar mass = 2/138 = 0.0145 molNo. of moles of acetic anhydride = mass/molar mass = 2/102 = 0.0196 molTo determine the limiting reagent, we need to calculate the amount of product that each reactant can produce.

According to the balanced equation, 2 moles of salicylic acid produces 2 moles of aspirin, while 1 mole of acetic anhydride produces 2 moles of aspirin. Therefore, the amount of aspirin that can be produced from each reactant is as follows : Amount of aspirin produced from salicylic acid = 2 x 0.0145 mol = 0.0290 molAmount of aspirin produced from acetic anhydride = 2 x 0.0196 mol = 0.0392 molSince salicylic acid can produce only 0.0290 mol of aspirin, it is the limiting reagent. This means that acetic anhydride is in excess. To determine how much of the excess reactant is used, we need to subtract the amount of acetic anhydride used from the amount that was initially present. The amount of acetic anhydride used is equal to the amount of salicylic acid used, which is 0.0145 mol.

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a. Decreasing alpha from 0.05 to 0.01 makes the significance level more stringent. You will be less likely to reject the null hypothesis, even when it's false. This increases the probability of a Type II error, thus potentially reducing the power of the test. The power curve will shift to the left.

b. If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

The power curve is a graph that shows the probability of rejecting the null hypothesis as a function of the true value of the mean.

In the given scenarios of this study, Reducing the significance level and reducing the sample size will shift the power curve to the left, indicating a decrease in the statistical power of the test.

The power of a statistical test is the probability that it correctly rejects the null hypothesis when the alternative hypothesis is true.

a) Reducing alpha from 0.05 to 0.01 means that we are more stringent in our assessment of whether the new treatment is effective.

This will result in a decrease in the power of the test, meaning that it is less likely that we will be able to detect a difference between the new treatment and the previous treatment.

b) If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

This is because a smaller sample size decreases the power of the test. A larger sample size provides more information and thus makes it more likely to correctly reject the null hypothesis when the alternative hypothesis is true.

Therefore, by reducing the sample size, you are decreasing the likelihood of detecting a true effect if one exists, thus reducing the power of the test.

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Answer:39 min

Explanation:

The atoms of the group's bottom-most elements are larger than those of the group's top-most components.

The atoms below in the group contain more electrons than the atoms at the group's top, which explains why. More electrons must be organized in more electron shells, which are spaced farther out from the nucleus as the number of electrons increases. The result of this is that atoms are growing larger.

Atomic radius often increases as one moves through a group and decreases as one moves through a period. The distance between the nucleus and the outermost orbital increases as one descends a group because the number of energy levels (n) increasing. The atomic radius grows as a result.

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Answer:

➢ Gold is found in pure state in nature but not the iron because gold is un-reactive metal, so it does not react with other element in normal condition but iron is reactive metal so it reacts with atmospheric oxygen in presence of moist (water) to form oxide.

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Answer:

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore they rarely react with other elements since they are already stable

Wet chemical system components typically are a storage tank or tanks, piping, nozzles, and an actuating mechanism.

The typical components of an actuation mechanism include a motor, transmission, control units, feedback, signaling, interlocking, and shutdown units. An electrical, hydraulic, or pneumatic drive is used to move a valve, shutter, or gate, which acts as an actuator to regulate the flow of fluids or gases.

When an automatic clutch is engaged, the control system 2 replaces the target-value signals coming over feeders 1 with the operator force signal if the operator uses the operator-dependent actuating mechanism.

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Answer:

For a: The increasing of atomic radius is:

Al < Mg < Na

For b: The pH of the solution of sodium oxide is greater than 7.

Explanation:

Atomic radius is defined as the distance of the nucleus to the outermost shell containing electrons.

It decreases as we move from left to right in a period because electrons get added up in the same shell and effective nuclear charge increased which results in the shrinkage of the atom.

Sodium lies in Period 3, group 1. Its atomic radius is 1.90

Magnesium lies in Period 3, group 2. Its atomic radius is 1.60

Aluminium lies in Period 3, group 3. Its atomic radius is 1.32

The increasing of atomic radius will be:

Al < Mg < Na

The mathematical values proves the result.

There are 3 types of solution based on pH:

When a metal reacts with oxygen present in air, it forms basic oxide which simply means when they react with water, they form basic solution.

The chemical equation for the reaction of sodium (metal) with oxygen present in air and reaction with water of the product so formed are as follows:

\(4Na+O_2\rightarrow 2Na_2O\)

\(Na_2O+H_2O\rightarrow 2NaOH\text{ (base)}\)

Sodium forms a basic solution when its oxide reacts with water, therefore the pH of the solution will be greater than 7.

Super saturated solution is a term used to describe a solution that contains more solute than the saturated solution at a particular temperature.

Your solution is referred to as unsaturated if you can continue to add solute while it still dissolves. Your solution is saturated when it can no longer dissolve any more solute at a particular temperature.

A solution that, under the same circumstances, contains more dissolved solute than a saturated solution is said to be supersaturated. The link between temperature and a substance's solubility is displayed by a solubility curve.

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Answer:

behavioral, physiological, structural

Explanation:

hi Hope's this helps lapras

The medium-sized eastern fence lizard (Sceloporus undulatus) is a species of lizard belonging to the Phrynosomatidae family. The species can be found in the eastern United States on rotting logs or stumps.

The name fence lizard, fence fast, grey lizard, gravid lizard, northern fence lizard, or pine lizard are other names for it. The horn-billed lizard is another common name for it. Its tendency to flee from fire ants when it comes across them is one of its most famous characteristics.

A varied family of lizards known as the Phrynosomatidae, sometimes known as the Phrynosomatinae, can be found from Panama to the far south of Canada. Many of the group's species can survive in hot, sandy deserts, whereas spiny lizards prefer stony deserts.

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There are seven types of hydrophobic amino acids present which are- Alanine, Valine, Leucine, Isoleucine, Methionine, Phenylalanine and Tryptophan. There are total 20 known amino acids present in nature.

The seven hydrophobic amino acids are:

1. Alanine (Ala)

2. Valine (Val)

3. Leucine (Leu)

4. Isoleucine (Ile)

5. Methionine (Met)

6. Phenylalanine (Phe)

7. Tryptophan (Trp)

These amino acids have nonpolar, hydrophobic side chains, which means they tend to avoid contact with water and instead tend to associate with each other or with other hydrophobic molecules. This makes them important for forming the hydrophobic core of proteins, where they can help stabilize the protein structure.

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The Mass of oxygen in isolated sample is 8.6 g

The law of constant composition states that pure samples of the same compound contain the same element in the same ratio by mass irrespective of the source from which the compound is obtained.

Considering the given ascorbic acid samples:

Laboratory sample contains 1.50 gg of carbon and 2.00 gg of oxygen

mass ratio of oxygen to carbon is 2 : 1.5

Isolated sample will contain 2/1.5 * 6.45 g of oxygen.

Mass of oxygen in isolated sample = 8.6 g

In conclusion, the mass of oxygen is determined from the mass ratio of oxygen and carbon in the compound.

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Note that the complete question is given below:

A sample of ascorbic acid (vitamin C) is synthesized in the laboratory. It contains 1.50 g of carbon and 2.00 g of oxygen. Another sample of ascorbic acid isolated from citrus fruits contains 6.45 gg of carbon. According to the law of constant composition, how many grams of oxygen does this isolated sample contain?

Express the answer in grams to three significant figures.

8.47 g

Answer: It is a molecular compound. (2) It contains a metal. (3) It can conduct electricity as a solid.

The ratio indicates that the hydrogen ion concentration of chemical A is 0.158 times lower than that of chemical B. Alternatively, the hydrogen ion concentration of chemical B is 6.31 times more acidic than that of chemical A.

The pH value of a substance is an essential indicator of its acidity or alkalinity. The pH scale ranges from 0 to 14. The midpoint of the scale is 7.0, which is neutral. Solutions with pH values below 7.0 are acidic, while those with pH values above 7.0 are alkaline.

Acid solutions have a high concentration of hydrogen ions. The negative logarithm of the hydrogen ion concentration (H+) is referred to as the pH. Similarly, solutions with a high hydroxide ion concentration have high pH values. The formula for pH is pH = -log[H].

1. Calculation of [H+] for Chemical A:Hence, we can rearrange the pH equation to calculate the hydrogen ion concentration as follows:[H] = 10^-pH= 10^-9= 1.0 × 10^-9 mol/L2. Calculation of [H+] for Chemical B:pH = -log[H]log[H] = -pHlog[H] = -8.2[H] = 10^-pH[H] = 6.31 × 10^-9 mol/L3.

Calculation of the ratio of [H+] for Chemical A and Chemical B:The ratio of [H+] for chemical A to that of chemical B can be found using the following formula:Ratio = [H+] of Chemical A / [H+] of Chemical B= (1.0 × 10^-9) / (6.31 × 10^-9)= 0.158The ratio indicates that the hydrogen ion concentration of chemical A is 0.158 times lower than that of chemical B. Alternatively, the hydrogen ion concentration of chemical B is 6.31 times more acidic than that of chemical A.

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Answer:

Pros: No vehicle emissions other than water vapor. Fuel economy equivalent to about twice that of gasoline vehicles. Hydrogen is abundant, and can be made from renewable energy. Cons: This space-age technology is expensive.

Answer:

The pros of hydrogen fuel cells are that they are very efficient, producing very little waste. They are also very stable, which makes them safe to use.

The cons of hydrogen fuel cells are that they can be expensive to produce and maintain, and they require a lot of energy to power them, meaning that they often aren't as efficient as they could be.

Despite these pros and cons, hydrogen fuel cells are still a very promising technology. With more research, attention, and development, they could be a powerful force in the fight against carbon emissions and global warming.

The calculated mass οf O₂ prοduced by the plant during phοtοsynthesis is apprοximately 3.86 grams.

Tο calculate the mass οf O₂ prοduced, we need tο determine the mοles οf CO₂ frοm the given vοlume and then assume an equal number οf mοles οf O₂ are prοduced.

Given:

Vοlume οf CO₂ = 3 L

Temperature = 25 degrees Celsius = 298.15 K

Pressure = 1 atm

Using the ideal gas law:

PV = nRT

Plugging in the values:

(1 atm) * (3 L) = n * (0.0821 L·atm/mοl·K) * (298.15 K)

Sοlving fοr n (mοles οf CO₂):

n = (1 atm * 3 L) / (0.0821 L·atm/mοl·K * 298.15 K)

n ≈ 0.1207 mοl

Since the stοichiοmetry οf the reactiοn tells us that fοr every 6 mοles οf CO₂ cοnsumed, 6 mοles οf O₂ are prοduced, we can assume that the mοles οf O₂ prοduced are alsο apprοximately 0.1207 mοl.

Finally, tο calculate the mass οf O₂, we multiply the mοles by the mοlar mass οf O₂ (32 g/mοl):

Mass οf O₂ = 0.1207 mοl * 32 g/mοl

Mass οf O₂ ≈ 3.86 g

Therefοre, the calculated mass οf O₂ prοduced by the plant during phοtοsynthesis is apprοximately 3.86 grams.

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Answer:

rest will do later mom is calling me plz understand promise will do it

Explanation:

Answer:

lol

Explanation:

its 5 points

The best two elution fractions to pool together for the application to a subsequent column would be the ones with the highest protein concentrations, regardless of whether they are adjacent to each other or not.

Based on the quantitative data, the best two elution fractions to pool together for the application to a subsequent column would be the fractions that have the highest protein concentration. This would ensure that the subsequent column would be able to effectively purify the desired protein.

In order to determine the best two elution fractions to pool together, you would need to look at the data for each fraction and compare the protein concentrations. The fractions with the highest protein concentrations would be the best ones to pool together for the application to a subsequent column.

It is important to note that the best two elution fractions may not necessarily be adjacent to each other. For example, if the data showed that fraction 2 had the highest protein concentration and fraction 5 had the second highest protein concentration, these would be the best two elution fractions to pool together, even though they are not next to each other.
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