What are the possible values of ml for each of the following values of l? l=0,1,2,3. Answer: The possible values of l is from 0 to n-1.

1. In order to answer this one and the next one, we will use mass percentage as our guide, since every compound has a mass percentage for each element, and this is found by checking the total mass and the separate masses of each element, for example, MgF2, the mass percentage is 39% for Mg and 61% for F2, this is due to their molar mass, 24g for Mg and 38g for F2

We have 27.1 g of Mg, and this will always correspond for 39% of the total mass of the compound, so we can do the following math:

100% = x

39% = 27.1g

x = 69.5 grams is the total mass of MgF2, now we only have to subtract the value of Mg and then we will have F2

69.5 - 27.1 = 42.4 grams, this is the mass of Fluorine

2. The same step by step from the previous question, 36% of the total mass is Al and 64% is S, but this question has a little difference, now we have the mass of the compound, but the process is very similar

100% = 50.2 grams

64% = x grams

x = 32.1 grams, which can be considered as letter A

Answer: Friction

Explanation: Friction is a force that opposes motion. When two objects are in contact, friction is acts in a direction opposite to the motion of the object.  Please give me brainliest!!!!!!!

Answer: friction: The resistance an object meets when moving over a surface or through a gas or liquid; it is the force that resists the motion of two surfaces that are touching each other.

Explanation:

Answer:

on the surface of lakes

Explanation:

The mass of the precipitate forms when the solution containing the 6.24 g of the potassium sulfide will reacted with the solution that is containing 19.2 g barium nitrate is 17.13 g.

The chemical equation is as :

Ba(NO₃)₂ (aq)  +  K₂SO₄(aq)  ---->  BaSO₄(s) + 2KNO₃(aq)

The mass of the potassium sulfide = 6.24 g

The mass of the barium nitrate = 19.2 g

The moles of the Ba(NO₃)₂ = mass / molar mass

The moles of the Ba(NO₃)₂ = 19.2 / 261.34

The moles of the Ba(NO₃)₂ = 0.0734 mol

The moles of the BaSO₄ = 0.0734 mol

The mass of the BaSO₄ = moles × molar mass

The mass of the BaSO₄ = 0.0734 × 233.38

The mass of the BaSO₄ = 17.13 g

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The molar concentration of a solution containing 469 grams of C6H12O6 in 82 milliliters of water is 31.7M.

The number of moles = 469g ÷ 180.156g/mol = 2.6mol

Volume of water in litres = 82/1000 = 0.082L

Concentration of solution = 2.6mol ÷ 0.082L = 31.71M

Therefore, the molar concentration of a solution containing 469 grams of C6H12O6 in 82 milliliters of water is 31.7M.

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To determine the number of moles of oxygen gas (O2) needed to produce 108 g of water (H2O) in the presence of excess hydrogen gas (H2), we need to consider the balanced chemical equation for the reaction.

The balanced chemical equation for the reaction between hydrogen gas and oxygen gas to form water is:

2H2 + O2 -> 2H2O

From the equation, we can see that 1 mole of O2 reacts with 2 moles of H2 to produce 2 moles of H2O.

First, we need to determine the number of moles of water (H2O) in 108 g. The molar mass of water is 18.015 g/mol. Therefore, the number of moles of water is calculated as:

moles of H2O = mass of H2O / molar mass of H2O

= 108 g / 18.015 g/mol

= 6 moles

Since the stoichiometric ratio between O2 and H2O is 1:2, we know that for every 2 moles of H2O, we need 1 mole of O2.

Thus, to produce 6 moles of H2O, we would need 6/2 = 3 moles of O2.

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The yield of the response is 245.6% and the number of moles of H2SO4 is 0.09849 moles.

To decide the yield of the response, we first need to ascertain how much \(H2SO4\) created:

Volume of H2SO4 = 20.1 mL = 0.0201 L

Grouping of H2SO4 = 4.9 M

Measure of H2SO4 = \(fixation x volume\) = \(4.9 M x 0.0201 L = 0.09849\) moles

We realize that the response is:

\(SO3(g) + H2O(l) → H2SO4(aq)\)

The decent condition lets us know that 1 mole of SO3 responds with 1 mole of H2O to create 1 mole of H2SO4. Hence, the hypothetical yield of \(H2SO4\) would be 0.0401 moles (since 40.1g of SO3 is comparable to 0.4 moles of SO3).

The genuine yield is given  \(H2SO4\) created, which is 0.09849 moles.

The yield of the response is then, at that point:

Yield = \((genuine yield/hypothetical yield) x 100 percent\)

= \((0.09849 moles/0.0401 moles) x 100%\)

= 245.6%

Subsequently, the yield of the response is 245.6%.

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The physical and chemical properties of the dental braces would be listed and explained below.

Dental braces are the dental devices or tools that are used for correction of abnormally developed tooth.

Wearing of dental braces can help to permanently straighten the teeth.

The physical properties of dental braces include the following:

The chemical properties of dental braces is that they are chemically inert leading to its ability to avoid any reaction with the wet (as well as low and high pH) environment of the mouth.

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Answer:Between the stirring vortex and the side of the glassware

When using a ph meter to monitor a stirring reaction mixture, the ph sensor electrode

should be placed;

between the stirring vortex and the side of the glassware.

The pH meter is an electric device that is used to measure the hydrogen-ion activity in water-based solutions. This means that it is used to measure the PH which is the acidity or alkalinity.

The pH meter is made up of a voltmeter attached to a pH-responsive electrode and a reference electrode.

Now, this pH-responsive electrode is usually made of glass while the reference electrode is usually a silver–silver chloride electrode.

Now when monitoring the stirring reaction mixture, the PH-responsive electrode written above is usually placed between the stirring vortex and the side of the glassware.

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The same amount of energy will not cause different substances to have identical temperature increases because each substance has a unique heat capacity. Heat capacity is the amount of energy required to raise the temperature of a given amount of a substance by 1 degree Celsius.

Different substances have different heat capacities due to differences in their molecular structures, so the amount of energy needed to raise the temperature of one substance may be more or less than the amount needed to raise the temperature of another substance by the same amount.

Similarly, the same amount of energy will not be needed to cause identical temperature increases in different amounts of the same substance because heat capacity is directly proportional to mass, meaning that larger amounts of the same substance will require more energy to raise the temperature by the same amount.

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A spontaneous change occurs by itself, without continued outside assistance. Kinetics must be considered when determining if a change is spontaneous. In thermodynamic terms, a spontaneous change has a negative ΔG.

A spontaneous change is a process that occurs without the need for external intervention or energy input. In thermodynamics, such a change is associated with a negative change in Gibbs free energy (ΔG) and indicates that the process is energetically favorable. However, the apparent spontaneity of a chemical reaction can be influenced by kinetics, which considers the rates and mechanisms of the reaction. Even if a reaction has a negative ΔG, it may not occur spontaneously if the activation energy is too high or the reaction pathway is unfavorable. Therefore, kinetics must be considered in addition to thermodynamics when determining the spontaneity of a chemical reaction.

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A negative enthalpy change indicates that a reaction is exothermic, releasing heat to the surroundings.

enthalpy change is a measure of the heat energy absorbed or released during a chemical reaction. It is denoted by ΔH and can be positive or negative. A negative enthalpy change indicates an exothermic reaction, where heat is released to the surroundings. In an exothermic reaction, the products have lower energy than the reactants, resulting in a decrease in enthalpy.

Exothermic reactions are often accompanied by the release of light or heat. Examples of exothermic reactions include combustion reactions, such as the burning of wood or the reaction between hydrogen and oxygen to form water. These reactions release energy in the form of heat, making them useful for applications such as heating and power generation.

On the other hand, a positive enthalpy change indicates an endothermic reaction, where heat is absorbed from the surroundings. In an endothermic reaction, the products have higher energy than the reactants, leading to an increase in enthalpy.

Endothermic reactions often require an input of energy to proceed. Examples of endothermic reactions include the process of photosynthesis in plants, where energy from sunlight is absorbed to convert carbon dioxide and water into glucose and oxygen.

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A negative enthalpy change does not always indicate that a reaction is exothermic.

Enthalpy change (ΔH) is a measure of the heat energy exchanged during a chemical reaction. It represents the difference between the energy of the products and the energy of the reactants. A negative enthalpy change (ΔH < 0) indicates that the reaction releases heat to the surroundings, suggesting an exothermic reaction.

However, it is important to note that not all reactions with a negative enthalpy change are necessarily exothermic. Some reactions may have a negative enthalpy change due to other factors, such as changes in bond energies or entropy effects.

For example, an endothermic reaction could still have a negative enthalpy change if the increase in disorder (entropy) of the system outweighs the energy absorbed. Therefore, while a negative enthalpy change often suggests an exothermic reaction, it is not a definitive indicator, and other factors must be considered to determine the overall nature of the reaction.

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Answer:

What do you think causes some rock types to have higher densities than others? (Assuming there are no air pockets in the rock, the types of minerals will determine the density. Granite contains lots of quartz and feldspar - both fairly light minerals, whereas basalt and gabbro are made of heavier minerals.)

Explanation:

Answer:

flourine

Explanation:

is it correct ...

Answer:

Baby steps in science occur small bits of__ gradually accumulate

Explanation:

Baby steps in science occur as small bits of evidence gradually accumulate. The evidence lets scientists refine and expand on earlier ideas.

A characteristic for a movie or book could be how good or bad the plot/story is. You can even get more into detail for movies. Such as, "How was the acting? When the character was sad did you really feel their expressions?"  Or so on like that haha.  For books, it could be about it's pattern of writing or such, "alliterations, stressed patterens etc. Hope I helped lol.

Answer:

Jelani Jones

Explanation:

But I thought it was 2 not three

Answer:

Speed is the time rate at which an object is moving along the path, while velocity is the rate and direction of the object's movement. put another way, speed is a scalar value while velocity is a vector value.

Explanation:

Ocean temperatures remain fairly constant because water has a high specific heat capacity of water.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius. The relationship between heat and temperature change is usually expressed as:

                                               Q = mcΔT

where, Q = heat added

m = mass

c = specific heat

ΔT = Change in temperature.

The high heat capacity of water keeps its temperature within a relatively narrow range, causing nearby coastal areas to also have a narrow daily and seasonal temperature range.

Large bodies of water tend to moderate the temperature of nearby land due to the high heat capacity of water. This high heat capacity results from both the higher specific heat of water and the mixing of heat throughout a greater depth over oceans.

Therefore, ocean temperatures remain fairly constant because water has a high specific heat capacity of water.

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Answer:

it will float if the object is 1g/cm^3(water 's density ) because it is less dense

Groundwater and surface water are interconnected as they both come from the same source, which is precipitation.

When rain falls on the ground, it can either infiltrate into the soil and become groundwater or run off into streams, rivers, lakes, and oceans as surface water. The amount of precipitation and the rate at which it infiltrates the ground determines the levels of both groundwater and surface water. Additionally, surface water can recharge groundwater, and groundwater can discharge into surface water.

Overall, the relationship between groundwater and surface water is important for understanding the water cycle and managing water resources.  

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Answer:

Answer:

0.0043

0.004 if to one significant figure

0 to one decimal place.

Explanation:

Mass=176g

Volume of cube= length ^3

=4 x 4 x 4

=64cm^3

Density = mass/volume

=176/64

=2.75g/cm^3

700.4 K is the e new temperature needed for the gas to increase its volume to 30.5 L at a constant pressure which is determined using  Charle's law.

The initial volume of gas = 10.81 L

Temperature -25°C

The final volume of gas = 30.5 L

Here we can use Charle's law because of changes in the volume and temperature of a gas at constant pressure.

The relation between volume and temperature is written as:

V1/T1 = V2/T2

We need to convert the temperature from the Celsius scale to the Kelvin scale.

T1 = -25°C + 273.15

T1 = 248.15 K

Substituting the values, we get:

V1/T1 = V2/T2

T2 = (V2 * T1) / V1

T2 = (30.5 L * 248.15 K) / 10.81 L

T2 = 700.4 K

Therefore, we can infer that the new temperature needed is 700.4 K.

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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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Answer:

C2H5OH is a formula of ethyl alchol or ethanol.

alkenes are characterisized by carbon-carbon double bond.

burning is an example of exothermic reaction

atomic number of element is x the symbol of its ion is +1 bcz it will lose one electron

if temperature increases then rate of chemical reaction increases

Explanation:

i hope this will help you :)

The price of mercury used to make one manometer is $2.600X, and the price of mercury used to make 15 manometers is $39.00X, where X represents the cost of mercury per cubic inch.

To find the price of the mercury used to make one manometer, we need to know the cost of mercury per cubic inch. Once we have that information, we can calculate the cost for one manometer by multiplying the volume of mercury used (2.600 in^3) by the cost per cubic inch.

Let's assume the cost of mercury is $X per cubic inch.

Price of mercury used to make one manometer = Volume of mercury used * Cost per cubic inch

= 2.600 in^3 * $X/in^3

= $2.600X

Now, to find the price of mercury used to make 15 manometers, we can multiply the cost of one manometer by the number of manometers.

Price of mercury used to make 15 manometers = Price of one manometer * Number of manometers

= $2.600X * 15

= $39.00X

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