What is the yearly exposure from wearing a watch with a luminous dial?

Answer:

6

Explanation:

The melting point of a 10-gram sample of the wax is 50 °C

The melting point of a substance is the temperature at which the substance changes state from solid to liquid.

Substances always have a particular melting point.

For example

Melting point of iron is 1538 °C

Melting point of copper is 1085 °C

Melting point of silver is 961.8 °C

The melting of a substance does not depend on the quantity of the substance.

∴ The melting point of a 10-gram sample of wax will have the same value as the melting point of a 5-gram sample of wax.

Hence, the melting point of a 10-gram sample of the wax is 50 °C

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C2H2 will be left  when the burning is complete.

The equation of the reaction is; 2C2H2 + 5O2 --> 4CO2 + 2H2O

The number of moles of C2H2 reacting is = 1.20 g/26 g/mol = 0.046 moles

The number of moles of O2 is = 3.50 g/32 g/mol = 0.109 moles

Since;

2 mole of C2H2 reacts with 5 moles of O2

x moles of C2H2 reacts with 0.109 moles of O2

x = 2 mole × 0.109 moles/5 moles

x = 0.044 moles of C2H2.

It then follows that C2H2 is the reactant in excess so C2H2  will be left  when the burning is complete.

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The density of the solid is  6.724 g/ml.

Density is the number of factors which can be people, animals, vegetation, or objects in a sure place. To calculate density, you divide the number of objects by the dimension of the place. The populace density of a rustic is the wide variety of human beings in that us of a divided by means of the location in square kilometers or miles.

The density of an amount to being counted is its mass divided by means of its quantity. it also includes measured at zero °C and at 1 atmosphere of stress. Density is vital in figuring out the buoyancy of materials in fluids, as well as in evaluating materials and other measurements.

The density of an object is certainly one of its maximum crucial and easily-measured physical properties. Densities are extensively used to perceive natural substances and to represent and estimate the composition of many varieties of combos.

density = mass/ volume

      = 975g/145ml

      = 6.724 g/ml

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According to the concept of Avogadro's number and STP conditions volume in liters of the sample is 15,388.7.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number

Number of moles is obtained as, number of atoms/Avogadro's number=4.088×10²⁴/6.023×10²³=6.78 moles on substitution in formula of PV=nRT=V=6.78×8.314×273/1=15,388.7 liters.

Thus, the volume is 15,388.7 liters of the sample.

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The line-bond formula for a triacylglycerol containing stearic acid and glycerol would show the three stearic acid molecules bonded to the three hydroxyl groups of the glycerol molecule.

A triacylglycerol, also known as a triglyceride, is a type of lipid that is composed of three fatty acid molecules and one glycerol molecule. Stearic acid is a saturated fatty acid with 18 carbon atoms, and glycerol is a three-carbon alcohol.

The line-bond formula for a triacylglycerol containing stearic acid and glycerol would show the three stearic acid molecules bonded to the three hydroxyl groups of the glycerol molecule. The formula would also show the chemical bonds between the carbon and hydrogen atoms of the fatty acid molecules.

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Answer:

When an object is allowed to fall,the concentrated gravitational potential energy is converted into the kinetic energy of motion. if there is no air resistance or other restrictions all of the potential energy will be converted to kinetic energy when the object has fallen the distance H

Explanation

When an object is allowed to fall,the concentrated gravitational potential energy is converted into the kinetic energy of motion. if there is no air resistance or other restrictions all of the potential energy will be converted to kinetic energy when the object has fallen the distance H

Answer:

See below

Explanation:

The following reasons tell why atom combine to form compounds:

1) They want to follow octet or duplet rule and attain the noble gas configuration.

2) They combine to form compounds because of the electrostatic attraction between them.

3) They form compounds to lower their energy and to become stable.

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Hope this helped!

To solve this we need to have knowledge of differential rate law which relate the rate to the concentration and time. Therefore, the rate of  overall reaction is 1x10⁻²M/s.

A differential rate law represents the rate of a reaction . According to this rate is directly proportional to changes in the concentration of reactants and inversely proportional to specific interval of time. There is another expression of rate law which is integrated rate law which is just opposite of differential rate law.

The given equation is

2NO + O\(_2\) \(\rightarrow\) 2NO\(_2\)

(1/2) Rate of disappearance of NO= rate of disappearance of C= (1/2)rate of appearance of NO\(_2\)= rate of overall reaction.

(1/2)rate of appearance of NO\(_2\)= rate of overall reaction.

rate of appearance of NO\(_2\)=2x10⁻²M/s.

Substituting the values in above equation

(1/2)×2x10⁻²M/s = rate of overall reaction.

rate of overall reaction= 1x10⁻²M/s

Therefore, the rate of  overall reaction is 1x10⁻²M/s.

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Answer:

Explanation:

To find the new concentration of the solution, we need to use the dilution formula:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

In this case, the initial concentration is 1.00 M and the initial volume is 295 mL, while the final volume is 2.25 L. We can plug these values into the dilution formula to solve for the final concentration:

C2 = (C1V1)/V2

= (1.00 M)(295 mL)/(2.25 L)

= 0.131 M

Therefore, the new concentration of the solution is 0.131 M.

Answer:

I hope this answers you question

Explanation:

If not plz comment

Answer:

= The mass number,in nuclear physics ,the sum of number of protons and neutrons present in the nucleus of an atom.

Measured mass of product actually produced divided by calculated mass of product that should be produced by the given amount of reactants gives the percent yield. The correct option is option C.

The % ratio of the theoretical yield to the actual yield is known as the percent yield. It is calculated as the theoretical yield times by 100% divided by the experimental yield. The percent yield equals 100% if the theoretical and actual yields are equal.

Because the real yield is frequently lower than the theoretical value, percent yield is typically lower than 100%. This may be due to incomplete or conflicting reactions or sample loss during recovery. Measured mass of product actually produced divided by calculated mass of product that should be produced by the given amount of reactants gives the percent yield.

Therefore, the correct option is option C.

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The compound is formed by 1 atom of gold and 3 atoms of chlorine.

In this case, the gold atom must have a charge of +3 in order to have a compound with a net charge of zero because the molecule Cl3 has a charge of -3. This is why the name of the compound is Gold(III) Chloride.

Answer: See below

Explanation:

n of CO2​ = 0.364mmol

Mass of C = 0.364*12 = 4.368 mg

n of H2​O = 184.37​ = 0.243 mol

The compound has 2*0.243mmol of H

Mass of H = 0.486 mg

Mass of O = 10.68 − (4.368+0.486) = 5.826mg

Moles of O = 0.364

C:H:O Ratios

0.364 : 0.486 : 0.364

= 1 : 1.34 : 1

= 3 : 4 : 3

So the empirical formula is C3​H4​O3​,

Empirical formula mass

= 88= 2 × Molar mass

And the molecular formula is C6​H8​O6

The higher the concentration of hydrogen ions A) the lower the pH. In a solution, the concentration of hydrogen ions (H+) determines its pH. The pH scale ranges from 0 to 14, with a pH of 7 being neutral.

A pH below 7 indicates an acidic solution, while a pH above 7 represents a basic or alkaline solution.
The relationship between pH and the concentration of hydrogen ions is inversely proportional, meaning that as the concentration of hydrogen ions increases, the pH value decreases. Consequently, a higher concentration of hydrogen ions results in a lower pH, making the solution more acidic.
It is important to note that the pH scale is logarithmic, meaning that each change of one unit in pH represents a tenfold change in the concentration of hydrogen ions. For example, a solution with a pH of 3 is ten times more acidic than a solution with a pH of 4 and a hundred times more acidic than a solution with a pH of 5.
Oxygen levels, on the other hand, are not directly related to the concentration of hydrogen ions or pH in this context. Therefore, options B and D are not accurate. Similarly, option C is not correct, as a higher concentration of hydrogen ions corresponds to a lower pH, not a higher one.

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Answer:

the shade/light is the independent variable

Explanation:

Answer:

the independent variable is the light and or shade.

Explanation:

because the light and the shade are going to both effect the growth.

and ive done this before haha well hope this helped

Answer:

Well, the acetone has a dipole, so dipole-dipole forces will be present. Water has a dipole and can also hydrogen bond, as can isobutyl alcohol.

Explanation:

All the possible intermolecular forces between acetone and water will be dipole - dipole interaction force and hydrogen bond.

The attractive interactions between both the positive ends of one polar molecule as well as the negative ends of another polar molecule were known as dipole-dipole forces.

A hydrogen bond seems to be an electrical attraction between such a hydrogen atom covalently bonded to a much more electronegative "donor" atom and group and maybe another electronegative with a single pair of electrons.

Acetone possesses a dipole, there must be dipole-dipole forces. Isobutyl alcohol, like water, does have a dipole and therefore can hydrogen bond.

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Answer:less reactive than sodium

Explanation:

Answer:

Fluorine (F):

highly reactive nonmetal

Explanation:

Answer:

The green color of BTB in the beaker suggests that the solution has a pH close to neutral, indicating a balanced concentration of hydrogen ions.

Explanation:

Bromothymol blue (BTB) is a pH indicator commonly used in chemistry experiments. It is a chemical compound with the formula C27H28Br2O5S and belongs to the class of sulfonphthalein dyes. BTB is typically prepared as a solution in water and has a yellow color in acidic solutions, blue in basic solutions, and green in neutral solutions.

In the case of the BTB in the beaker appearing green, it indicates that the solution has a pH close to neutral. BTB changes its color depending on the concentration of hydrogen ions (H+) present in the solution, which is determined by the pH. At a neutral pH of around 7, the concentration of H+ ions is balanced, causing BTB to exhibit a green color.

The specific shade of green may vary depending on the exact pH of the solution. If the solution were more acidic, the BTB would appear yellow, and if it were more basic, it would appear blue.

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3.carbon dioxide

5.Tetrachloromethane

4?

6.Ammonia

HOPE IT HELPS:)

The correct statement regarding the Hedonic Scale is option b: Participants vote for one of nine codes, which are subsequently totaled and then averaged based on the number of participants.

The Hedonic Scale is a well-established method utilized for the measurement of subjective experiences, encompassing emotions, preferences, or related constructs. It plays a pivotal role in numerous fields, including psychology, market research, and consumer studies.

This approach enables the quantification of subjective experiences or preferences by assigning ratings to specific codes or categories, thus facilitating analysis and providing valuable insights in fields such as psychology, market research, and consumer studies.

In the context of the Hedonic Scale, participants are presented with a set of codes or categories that represent distinct options or aspects. In this case, the scale comprises nine codes. Participants are then requested to select and cast a vote for the code that best reflects their experience or preference.

Following the collection of participant votes, the subsequent step involves the calculation of an overall score or rating. Option b accurately asserts that the scores assigned to each code are aggregated and subsequently averaged based on the total number of participants.

This calculation is performed by summing up the scores for each code and dividing the sum by the total number of participants.

This methodological approach serves to provide researchers with a quantitative understanding of the collective subjective experiences or preferences expressed by the participants.

By analyzing the results, researchers gain valuable insights into the impact and perception of various codes or categories, thereby informing research studies and decision-making processes.

The Hedonic Scale serves as a valuable tool for capturing and assessing subjective experiences within a structured framework, facilitating rigorous analysis and enhancing the depth of understanding in relevant domains.

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The complete question is:

Which of the following statements about the Hedonic Scale is correct?

Select one: a. Participants vote on all nine codes which are totalled and then averaged by the number of participants.

b. Participants vote for one of nine codes which are totalled and then averaged by the number of participants.

c. Participants vote for one of nine codes which are totalled and compared to a standard scoring reference.

d. Participants vote on up to three codes which are totalled and then averaged by the number of participants.

Chefs measure the number of ingredients they need before preparing foods for accuracy, consistency, and balancing flavors.

Measurements ensure accuracy and consistency in recipes. Cooking is a precise process, and precise measurements of ingredients are crucial for achieving the desired taste, texture, and overall outcome of a dish. By measuring ingredients, chefs can replicate their recipes consistently, ensuring that each dish turns out as intended.

Certain ingredients, such as spices, seasonings, and acids, can greatly impact the taste of a dish. By carefully measuring these ingredients, chefs can maintain a precise balance of flavors.

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The ability of an atom in a covalent bond to attract shared electrons to itself is best quantified by its electronegativity value.

Electronegativity is a measure of the tendency of an atom to attract electrons to itself when it forms a chemical bond with another atom. The electronegativity values of atoms are typically determined experimentally and are assigned on a scale known as the Pauling scale. The higher the electronegativity value of an atom, the more strongly it attracts shared electrons towards itself. Electronegativity values can be used to predict the polarity of a covalent bond and the distribution of electrons in a molecule.

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Answer: permeable and porous

The magnitude of the rate of change of [B] is 0.233 M/s when [A] is decreasing at 0.930 M/s.

The rate of change of a reactant or product in a chemical reaction is given by the rate law, which can be determined experimentally. The rate law is typically expressed in terms of the concentrations of the reactants and products, as well as any catalysts or inhibitors present in the reaction.

For the given reaction 4 A + 5 B → 2 C + 3 D, the rate law can be expressed as:

rate = k[A]^p[B]^q

where k is the rate constant, p and q are the orders of reaction with respect to A and B, respectively, and [A] and [B] are the concentrations of A and B, respectively.

Since we are interested in the rate of change of [B], we can use the following expression:

rate of change of [B] = - (1/q) (d[B]/dt)

= (1/p) (d[A]/dt)

where d[B]/dt and d[A]/dt are the instantaneous rates of change of [B] and [A], respectively.

Given that [A] is decreasing at a rate of 0.930 M/s, we can use the above expression to calculate the rate of change of [B]:

rate of change of [B] = (1/4) (0.930 M/s)

= 0.233 M/s

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Answer:

Butane is a gas at room temperature and pressure, but the butane found in some cigarette lighters is a liquid. How can this be?

Vapor Pressure:

The vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid phase in a closed system at constant temperature. It is also an indication of the tendency of a gas to escape from liquid phase. For example, a substance with a high vapor pressure at normal temperatures is a volatile substance (high tendency to become vapor). If the pressure in a closed system is higher than the vapor pressure of a substance at the given temperature, then the substance will be "compressed" to liquid state.

Explanation:

plz follow me and mark brainlist a d drop some thanks

Answer:

2CrO3-->2Cr2O3--->3O2