If 135.7 J of heat are added to 54.0 g of water initially at 25.0 °C . What is the final temperature of the water?

Answer:

B. Compare the speed of her toy to another similar toy.

Explanation:

A body is said to be in motion when there is a change in position with respect to time. The speed of a body in motion is a measurement of distance to time. The formula is given thus;

Speed = Distance * Time

To accurately determine the fastness or slowness of a moving object, comparisons should be made, or a standard used to ascertain the truth. When a comparison is made with an object with similar characteristics, then it becomes easier to know which is moving faster or slower when the speeds are compared. An average can be obtained, and if the speed of the object being checked falls below average, then it is slow. If the speed is above average, then it is fast.

So, for Yasmine to know if her toy is moving fast or slow, she needs to compare hers with another similar toy.

Yasmine can determine the speed of her toy by measuring the distance it travels in a set time, comparing this speed to another toy, or calculating the duration the toy travels for a fixed distance.

To determine if her toy moves fast or slow, Yasmine can conduct a few simple tests. First, she can measure the distance her toy travels over a certain period of time. This is the basic principle behind speed, which is defined as distance travelled per unit of time. The larger the distance it can travel in a short time, the faster the toy is.

Secondly, she may compare the speed of her toy with another similar toy. If her toy travels the same distance in less time, then it's faster. If it takes more time, then it's slower.

Lastly, Yasmine can calculate how long the toy travels for a fixed distance. The shorter the time taken, the faster the toy is.

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Answer:

Option A. X represents water and Z represents oxygen.

Explanation:

Glucose + Z → X + Y + Energy

The equation above gives an illustration of the Combustion of glucose to produce energy needed for metabolic activities.

Thus, writing a balanced equation will help us to identify what X and Z most likely represent. This is illustrated below :

C6H12O6 + 6O2 —> 6H2O + 6CO2 + Energy

We can see clearly that Z is constant i.e Z is oxygen. But X could be either CO2 or H2O.

Considering the options given above, only option A states that Z is oxygen. Therefore, X must be water (H2O).

Answer:

A

Explanation:

Answer:

Maybe mol

Explanation:

Answer:

Student's percent yield =  94.6%

Explanation:

Given:

Estimated yield of BaSO₄(s) = 1.352 grams

Actual yield = 1.279 grams

Find:

Student's percent yield = ?

Computation:

Student's percent yield = [Actual yield / Estimated yield of BaSO₄(s)]100

Student's percent yield = ( 1.279 grams / 1.352 grams)100

Student's percent yield = (0.946)100

Student's percent yield =  94.6%

The percent yield of BaSO4(s) is 94.6%, calculated by dividing the actual yield by the theoretical yield and then multiplying by 100.

The student's percent yield of BaSO4(s) can be calculated using the formula for percent yield, which is (actual yield/theoretical yield) × 100%. In this case, the student has an actual yield of 1.279 grams and a theoretical yield of 1.352 grams.

The calculation for percent yield will be: (1.279 g / 1.352 g) × 100% = 94.6%

Percent yield is an important concept in gravimetric analysis and it helps chemists understand the efficiency of a precipitation reaction in experiments.

Answer:

Graph D is correct since the Force is inversely proportional to the square of the distance.

Graph D is correct.

The relationship between Coulomb force and the distance between the charged particles is as follows:-

[tex]F=k(q_1*q_2)/(r^2)[/tex]......(1)

Here, q1 and q2 are the charges, r is the distance between charged particles, and k is the coulomb constant.

From equation (1), it can be said that the force is inversely proportional to the square of the distance. So, Graph D is correct.

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Answer:

Diluted solution

Explanation:

It is simple in terms of looking in to it, solute is the solid part of the solution and if a small quantity is dissolved in a solvent which can hold more then the solute added will make the solution diluted and for more info- other answers depict that there is more solute in the solution therefore others can not be the answer

Final answer:

An unsaturated solution contains less solute than it can possibly hold at a given temperature, meaning more solute can still be dissolved. The correct option is b.

Explanation:

A solution that contains less solute than it can possibly hold at a given temperature is referred to as an unsaturated solution. In an unsaturated solution, the solvent is holding solute less than the maximum limit, which indicates that more solute can be dissolved. This is in contrast to a saturated solution, where the solvent is holding the maximum amount of solute that it can dissolve at a given temperature. Another related term is a supersaturated solution, which contains more solute than the solubility limit at a particular temperature and requires special conditions, such as cooling a hot saturated solution, to be formed.

Answer:

The bimolecular rate constant for the reaction Cl + O3 → ClO + O2 is measured over the temperature range 210 to 360 K in a discharge flow system using Cl atom resonance fluorescence at 134.72 nm to monitor the decay of Cl under pseudo first order conditions. Results, expressed in the form k1 = (2.35 ± 0.5) × 10−11 exp[−(171 ± 30)/T], are compared with other recent studies of this reaction. Stratospheric implications are discussed briefly including the possibility of a concurrent three-body mechanism with O2 forming ClO3.

Explanation:

nonpolar covalent bond (with LD force)

Answer:

The litmus paper will turn blue; Ca(OH)₂  

Explanation:

Limewater is a dilute aqueous solution of calcium hydroxide.

Ca(OH)₂(aq) ⟶ Ca²⁺(aq) + 2OH⁻ (aq)

Limewater contains hydroxide ions. They cause the limewater to be basic.

Litmus is a mixture of dyes extracted from lichens. They are weak acids with complicated formulas.

Let's just write the formula for litmus as HLit.

The hydroxide ions from limewater react with the H of litmus to form a salt — the base form — and water.

    HLit + OH⁻ ⟶     Lit⁻    + H₂O

acid form            base form

    red                      blue

The base form of litmus is blue, so

Red litmus turns blue in the presence of limewater.

Red litmus paper turns blue when added to limewater due to its alkaline nature (Ca(OH)2).

When red litmus paper is added to limewater, it will turn blue. This color change occurs because limewater, which has the chemical formula Ca(OH)2, is alkaline/basic in nature. The reaction between the red litmus paper and the limewater indicates the alkaline properties of limewater.

Answer: 2.91 m

Explanation:

Final answer:

To calculate the molality of the solution, divide the moles of solute by the mass of solvent in kilograms. In this case, the moles of NaCl is 0.435 and the mass of water is 150 grams, so the molality is 2.907 mol/kg.

Explanation:

To calculate the molality of the solution, we need to use the formula:

Molality (m) = moles of solute / mass of solvent (in kg)

First, we need to convert the mass of NaCl to moles:

Moles of NaCl = mass of NaCl / molar mass of NaCl

Moles of NaCl = 25.5 g / 58.5 g/mol = 0.435 moles

Next, we need to convert the volume of water to mass:

Mass of water = volume of water x density of water

Mass of water = 150 mL x 1.00 g/mL = 150 g

Finally, we can calculate the molality:

Molality = Moles of NaCl / Mass of water (in kg)

Molality = 0.435 moles / 0.150 kg = 2.907 m

So, the molality of the solution is approximately  2.907 mol/kg.

Answer:

1.13×10^25 molecules of water.

Explanation:

Equation of the reaction;

C8H18(g) + 25/2 O2 (g) -------> 8CO2(g) + 9H2O(l)

It is important to first put down the balanced reaction equation. It is not possible to solve any problem on stoichiometric relationship without a balanced reaction equation. Once the equation is obtained, we can now proceed with other steps in the solution of the problem.

From the reaction equation, 1 mole of C8H18 produces 9 moles of water

1 mole of C8H18 occupies 22.4L volume while 1 mole of water contains 6.02×10^23 molecules of water

Hence

22.4 L of C8H18 produces 9(6.02×10^23) molecules of water

46.72 L of C8H18 will produce 46.72 L × 9(6.02×10^23) molecules of water/22.4 L

= 113×10^23 or 1.13×10^25 molecules of water.

Answer:

The amount of sunlight and rainfall in different climates determines the climate temperature and humidity hence the majority of the factors of a climate

Explanation:

The climate of  a place is its average weather condition, such as the temperature, snow and rainfall, wind etc. The factors that determines the climate of a region includes the amount of sunlight received, the height above sea level etc

The amount of sunlight determines the amount of heat energy received at a location and hence the temperature of the climate

The amount of rainfall will determine how wet or cold a place as well as the dissipation of the energy from the sun.

Therefore, the amount of sunlight and rainfall in different climates determine the climate temperature and humidity and other dependent climate factors.

The amount of sunlight and rainfall in different climates determines the climate temperature and humidity hence the majority of the factors of a climate. The amount of rainfall and sunlight changes the weather as follows:-

The climate of  a place is its average weather condition, such as the temperature, snow and rainfall, wind etc.

The factors that determine the climate of a region includes the amount of sunlight received, the height above sea level etc

The amount of sunlight determines the amount of heat energy received at a location and hence the temperature of the climate  and the amount of rainfall will determine how wet or cold a place as well as the dissipation of the energy from the sun.

Therefore, the amount of sunlight and rainfall in different climates determine the climate temperature and humidity and other dependent climate factors.

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Answer: 1.0 mole of sodium

Explanation:

40.0 g NaOH  x __1 mol__ x __2 mol Na__ = 1 mol of Na

                            39.999 g      2 mol NaOH

Answer:

Mould

Explanation:

I think mould (fungi)

Answer:

Increase pressure

Explanation:

Liquids and solids exhibit practically no change of solubility with changes in pressure. Gases as might be expected, increase in solubility with an increase in pressure. This is typified by Henry's law. Henry's Law states that: The solubility of a gas in a liquid is directly proportional to the pressure of that gas above the surface of the solution.

Temperature affects the solubility of both solids and gases, but pressure only affects the solubility of gases. Surface area does not affect how much of a solute will be dissolved, but it is a factor in how quickly or slowly the substance will dissolve.

The solubility of a solid may increase or decrease with increasing temperature, whereas the solubility of a gas decreases with an increase in temperature and a decrease in pressure.

Since the chemical referred to in the question can not be a gas, then increase in pressure will not affect its solubility.

Answer:

I think it would be double D.

The C. Quadruple is not a type of covalent bond

A covalent bond is formed when two atoms share electrons between them. The types of covalent bonds are non-polar, polar, single, double, and triple. Non-polar covalent bonds occur when electrons are shared equally between atoms, while polar covalent bonds occur when electrons are shared unequally between atoms. Double and triple bonds occur when more than one pair of electrons is shared between atoms.

Quadruple is not a recognized type of covalent bond in chemistry. Covalent bonds typically refer to single, double, and sometimes triple bonds, which involve the sharing of one, two, or three pairs of electrons between atoms, respectively. Quadruple bonds are not commonly observed in chemical compounds. Thank you for pointing out the clarification.

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Answer:

350ml

Explanation:

trust

M, sometimes known as a molar, stands for molarity. When one gram of solute dissolves in one litre of solution, the solution has a molarity of one. Here the concept molarity is used to determine the new volume of water and it is 360 mL.

One of the most widely used units for measuring solution concentration is the moles/litre, which is symbolised by the letter "M" and is defined as the number of moles of solute in a litre of solution. The amount of solute or the volume of solvent is often calculated using molarity.

If these factors change, the volume of the solution changes according to how the molarity fluctuates with temperature and pressure.

The relationship existing between the molarity and volume of two solutions is given as:

M₁V₁ = M₂V₂

V₂ = M₁V₁  / M₂

18.0 × 10.0  / 0.50 = 360 mL

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Answer:

She is not correct because ∠1 is an alternate exterior angle with ∠3, not the angle that measures 105°. So m∠1 = 75°.

Explanation:

Hope This Helps :)

The measure of m<1 is 75 degrees showing that Carmen is incorrect.

The measure of <3 and 105 degrees are supplementary hence;

m<3 + m<105 = 180

m<3 = 180 - 105

m<3 = 75 degrees

From the diagram the two lines are parallel to each other, hence m<1 = m<3 (alternate exterior angle)

Hence the measure of m<1 is 75 degrees showing that Carmen is incorrect.

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Answer:

The hydrogen ion concentration of a solution is 0.01 m what is its PH

Explanation: The pH of a given solution is nothing more than the negative log base 10 of the concentration of hydrogen ions, H+ , which you'll sometimes see written as H3O+ , the hydronium ion. Because the pH is <7 , this solution will be acidic

Explanation:

Answer:

a subscript

Explanation:

Answer:

A.

Explanation:

'4' is a subscript which shows the number of atoms.

Answer:

Freezing point of the solution is -1.07°C

Explanation:

The addition of a solute to a solvent decreases its freezing point following the formula:

ΔT = Kf×m×i

Where ΔT is change in temperature (0°C - X); Kf is constant of solvent (1.86°C/m), m is molality (moles glucose per kg solvent) and i is Van't Hoff factor (1 for glucose).

Molality of the solution is:

15.5g glucose -Molar mass 180.156g/mol- contains:

15.5g × (1mol / 180.156g) = 0.086 moles of glucose / 0.150 kg water = 0.574 m

Replacing:

0°C - X = 1.86°C/m × 0.574 × 1

-X = 1.07°C

Freezing point of the solution is -1.07°C

The freezing point of an aqueous solution of 15.5 g glucose dissolved in 150 g water will be "-1.07°C".

According to the question,

Constant of solvent, [tex]K_f[/tex] = 1.86°C/m

Change in temperature, ΔT = 0°C - X

Grams of glucose = 15.5 g

Grams of water = 150 g

We know the relation,

Solution's molality = 15.5 × [tex]\frac{1 \ mol}{180.156}[/tex]

                               = [tex]\frac{0.086}{0.150}[/tex]

                               = 0.574 m

hence,

→ ΔT = [tex]K_f[/tex] × m × i

By substituting the values,

0°C - X = 1.86° × 0.574 × 1

        X = -1.07°C      

Thus the answer above is correct.

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Answer: 15.62 moles of [tex]HgO[/tex] are needed to produce 250.0 g of [tex]O_2[/tex]

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} O_2=\frac{250.0g}{32g/mol}=7.812moles[/tex]

[tex]2HgO\rightarrow 2Hg+O_2[/tex]

According to stoichiometry :

1 mole of [tex]O_2[/tex] is produced from decomposition of =  2 moles of [tex]HgO[/tex]

Thus 7.812 moles of [tex]O_2[/tex] will be produced from decomposition of  =[tex]\frac{2}{1}\times 7.812=15.62moles[/tex] of [tex]HgO[/tex]

Thus 15.62 moles of [tex]HgO[/tex] are needed to produce 250.0 g of [tex]O_2[/tex]

Answer:

C-15.63

Explanation:

Correct on EDGE

Answer:

C. Single covalent bond

Explanation:

A covalent bond would form between these atoms. Covalent bonds

involve atoms sharing electrons.

have a good day

-Hops

A child complains that his soup is too hot. His mother places an ice cube in the soup to cool it.

How will the soup's thermal energy behave?

Answer:

It will flow from the soup to the ice cube

Explanation:

When an ice cube with low thermal energy is in a hand that has higher thermal energy, thermal energy will flow from the hand to the ice cube in the form of heat.

Answer:

B. It will flow from the soup to the ice cube

Explanation:

Answer:

Yeah, uh huh, you know what it is Crust moving cause of plate tectonics Yeah, mantle’s like plastic And the core is really dense and metallic Memorize this song and you’ll know everything about the Crust and mantle, crust and mantle, crust and mantle, crust and mantle Moving on down there are two more layers called the Outer core, inner core, outer core, inner core Mr. Lee, science teacher, at it again Sick flow spittin’ that regurgitation Ready to begin so without further adoI’mma hop up on this fresh beat so I can teach you About the layers of the Earth, first things first The outermost layer is the crust filled with dirt And rocks and sand, I hope you understand The crust is the layer on top of which we stand Its made out of rocks, mostly igneous Oceanic crust the densest and the skinniest Sinks below some other crust during subduction Which might result in a volcano and eruption

Explanation:

Answer:

Al+O= Al2O3

Explanation:

the chemical formula is Al3 +O2 so if we swapped and dropped the resulting compound is Al2O3

hope this helps

Answer:

1.5

Explanation:

EDG 2020

250ml is the volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].  The volume is the amount fluid that the container may hold.

A measurement of three-dimensional space is volume. Several imperial either Us or customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively. Volume and length (cubed) have a symbiotic relationship.

The volume of such a container is often thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the amount much fluid (liquid or gas) that the container may hold.

Molarity₁×Volume₁ = Molarity₂×Volume₂

4×Volume₁ = 1×1

Volume₁  = 250ml

Therefore, 250ml is the volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].

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Your question is incomplete but most probably your full question was,

What volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].

Answer:

higher gas pressure inside the balloon

Explanation:

The kinetic energy of an object is defined as the work needed to accelerate an object of a given mass from rest to motion.

A person walking is an example of kinetic energy.

The particles of a gas inside a balloon are experiencing an increase in their average kinetic energy and the number of collisions  with the wall of the balloon due to higher gas pressure inside the balloon

Objects considered a solid:

Pencil

Water bottle

Phone

Table

Plant

Atoms are very attracted to one another in solid objects. They vibrate, but remain in fixed positions without moving.

Final answer:

A solid is a state of matter in which atoms or molecules do not have enough energy to move. They are constantly in contact and in fixed positions relative to one another.

Explanation:

A solid is a state of matter in which atoms or molecules do not have enough energy to move. They are constantly in contact and in fixed positions relative to one another. Forces between atoms or molecules are strong enough to keep the molecules together and to prevent them from moving past one another.

Final answer:

When 40.0 g of NaOH is added to 1.00 L of water, it does not make a 1.00 M NaOH solution because the molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters.

Explanation:

When 40.0 g of NaOH is added to 1.00 L of water, it does not make a 1.00 M NaOH solution because the molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters.

To make a 1.00 M NaOH solution, we need to know the number of moles of NaOH and the volume of the solution in which it is dissolved. In this case, we are given the mass of NaOH (40.0 g) but not the volume of the solution. Without the volume, we cannot calculate the molarity.

To determine the molarity, we need to know either the volume of the solution or the number of moles of NaOH added to the solution.