why water wet glass​

Answer:

d. the strength of the forces between its atoms​

Explanation:

The strength of the intermolecular forces between the atoms of the pure substance will determine the type of substance it is when heated to 100°C.

Answer:

A. Tissues are made up of cells

Explanation:

I just googled it :3

Answer:

A liquid changes to gas

Explanation:

"Evaporation is the process by which water changes from a liquid to a gas or vapor. Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor."

Answer:

B

Explanation:

Giving the answer

Answer:

Physical dependence is characterized by tolerance and withdrawal. Drug or substance dependency is psychological.

Answer:

The answer is increasing the distance between two objects decreases the gravitational force. which is C

Explanation:

Neon gas has 2 times the root mean square speed to that of Krypton at same temperature.

The formula for calculation of root mean square speed is as follows -

v = ✓(3RT/M). In the formula, v is speed, R is gas constant, T is temperature and M is molar mass. Based on the information, we can interpret that all the values will be same except speed and molar mass. So, keeping the value of molar mass of Neon and Krypton to find the speed.

Let gas 1 be Neon and gas 2 be Krypton.

\( v_{1}\)/\( v_{2}\) = ✓\( M_{2}\)/\( M_{1}\)

Molar mass of Neon = 20 g/mol

Molar mass of Krypton = 84 g/mol

\( v_{1}\)/\( v_{2}\) = ✓84/20

\( v_{1}\)/\( v_{2}\) = ✓4.2

\( v_{1}\)/\( v_{2}\) = 2

\( v_{1}\) = 2\( v_{2}\)

Thus, root mean square speed of Neon is 2 times of root mean square speed of Krypton.

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Nitrogen is the most abundant component of the atmosphere in terms of volume. This means that nitrogen makes up the largest part of the atmosphere in terms of volume compared to other components.

Nitrogen is an extremely important component of the atmosphere, making up 78% of the atmosphere in terms of volume. This means that nitrogen is the most abundant component of the atmosphere when looking at volume. This abundance of nitrogen is due to the fact that the atmosphere is made up of mostly nitrogen and oxygen. Nitrogen is used to create the majority of the air we breathe, and is essential for life on Earth. Nitrogen also plays an important role in the global climate, as it is a key component of the Earth's greenhouse gases. It helps regulate temperatures and also helps protect the planet from the damaging effects of the sun's radiation. Nitrogen is essential for all living things, making it an incredibly important component of the atmosphere.

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The lines in a line graph aid in the fairly early detection of trends, allowing the viewer to make predictions about the data that has not yet been recorded.These are appropriate for illustrating the data points since, given one variable, the other is simple to ascertain.

A line graph, often known as a line chart, is a visual representation of data that is continuously changing over time.

There are two axes. in a line graph, the occurrences and categories being compared throughout time are shown on the x-axis (abscissa), and the scale, which is a group of integers that reflects the data and is divided into equal intervals, is shown on the y-axis (ordinate).

Depending on the data, the graph's lines may either decline or ascend. It is practical to plot time graphs along the x/y axis since it shows the rise and fall of data points in great detail.

The reader may readily see changes in one group over time by choosing the appropriate scales for each axis (time on the x-axis and change is measured on the y-axis).

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Answer:

Your answer is 92.48 degrees Fahrenheit, or just 92 degrees.

Explanation:

The formula for finding degrees Celsius and turning them into Fahrenheit is: (C x 9/5) + 32. So,

33.6 x 9/5 = 60.48

60.48+ 32= 92.48.

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An unknown compound has the following chemical formula: PbO where x stands for a whole number. Measurements also show that a certain sample of the unknown compound contains 3.1 mol of oxygen and 3.11 mol of lead. The complete chemical formula for the unknown compound is PbO, indicating that for every mole of lead, there is one mole of oxygen

To determine the complete chemical formula for the unknown compound with the formula PbO, we need to find the whole number value of x by using the given measurements.

According to the chemical formula, PbO, the ratio of lead (Pb) to oxygen (O) is 1:1. This means that for every mole of lead, there is one mole of oxygen.

Given that the sample contains 3.1 mol of oxygen and 3.11 mol of lead, we can compare the moles of oxygen and lead to determine the whole number value of x.

From the given measurements, we observe that the ratio of oxygen to lead is approximately 3.1:3.11. To simplify this ratio, we can divide both values by the smaller one, which is 3.1.

3.11 mol of lead / 3.1 mol of oxygen = 1 mol of lead / 1 mol of oxygen

This indicates that the whole number value of x in the chemical formula PbO is 1.

Therefore, the complete chemical formula for the unknown compound is PbO, indicating that for every mole of lead, there is one mole of oxygen.

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A table comparing the important parameters of the two engine designs is shown below:ParametersDesign 1Design 2Compression Ratio 18:118:1Φ (Equivalence Ratio)0.75 (Richer)0.65 (Leaner)EGR Level 10%15%Intake Temperature 80°C100°C Intake Pressure 1 bar0.5 bar Intake Valve Closing −15 deg BTDC−25 deg BTDC.

The compression ratio is the ratio of the volume of the combustion chamber from its largest capacity to its smallest capacity. The compression ratio in Design 1 is 18:1, while in Design 2, it is 18:1. The higher compression ratio is seen in Design 1, which will lead to a higher engine efficiency since more fuel energy is converted into useful work.

The Φ (equivalence ratio) is the ratio of the actual air/fuel ratio to the stoichiometric air/fuel ratio. A Φ value of 1.0 indicates a stoichiometric mixture, whereas values less than 1.0 indicate a lean mixture and values greater than 1.0 indicate a rich mixture. The Equivalence ratio in Design 1 is 0.75, which means it is running rich, while in Design 2, it is 0.65, which means it is running lean.

The design 2 engine has a higher Φ (equivalence ratio) level, which may lead to lower NOx emissions due to lean-burn combustion.The EGR (Exhaust Gas Recirculation) level in Design 1 is 10%, whereas in Design 2, it is 15%. The EGR level in Design 2 is higher than that in Design 1, which can help to reduce NOx emissions by lowering the temperature of combustion.

Intake temperature is 80°C in Design 1, whereas in Design 2, it is 100°C. The higher intake temperature in Design 2 means that the engine will have a higher thermal efficiency due to the increased Carnot efficiency.Intake pressure is 1 bar in Design 1, while in Design 2, it is 0.5 bar. The higher intake pressure in Design 1 results in more air being compressed into the combustion chamber, allowing for more fuel to be burned and greater efficiency.

Intake Valve Closing (IVC) is −15 deg BTDC in Design 1 and −25 deg BTDC in Design 2. The IVC timing is responsible for trapping the charge in the combustion chamber and influencing the engine's breathing. The lower IVC timing in Design 2 provides less resistance to flow, resulting in greater volumetric efficiency.

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Answer:

Dark clothing

Explanation:

Dark clothing like black absorbs/locks in heat. Since exercise is to burn and tonify our body from unwanted fat it is important to sweat. This is where heat comes in and helps you sweat

I prefer light coloured cloth to wear, as if we wear dark coloured cloth during exercise it will absorb more heat bcox of the thickness and etc etc..but when it's light coloured cloth it won't have much thickness and it's fabric is just suitable for warm places..

Human activities that disrupt the carbon cycle include the burning of fossil fuels. The statement that best summarizes the disruption of the carbon cycle due to the burning of fossil fuels is: b) Burning fossil fuels adds carbon compounds to all Earth systems.

When fossil fuels, such as coal, oil, and natural gas, are burned, carbon that has been stored in these fuels for millions of years is released into the atmosphere as carbon dioxide and other greenhouse gases. This process significantly increases the amount of carbon compounds in Earth’s systems, including the atmosphere.

The burning of fossil fuels contributes to the increase in atmospheric CO2 levels, which is a major driver of anthropogenic climate change. The additional carbon compounds released from burning fossil fuels disrupt the natural balance of the carbon cycle by adding more carbon to the atmosphere than can be naturally absorbed by Earth’s systems. This leads to an accumulation of greenhouse gases and contributes to global warming and associated climate impacts. While other statements may partially describe the effects of burning fossil fuels on the carbon cycle, option b provides the most accurate and comprehensive summary of the disruption caused by this activity.

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The group of measurements that is the most precise is option b) 2 g, 2.5 g, 3 g.

This is because precision refers to how closely a group of measurements are to each other.

In this case, the measurements in option b are the closest together, with only a difference of 0.5 g between each measurement.

Therefore, this group of measurements is the most precise.

It is important to note that precision does not necessarily mean accuracy, as the measurements could all be close together but still be far from the true value.

However, in this case, we are only looking at precision, so option B is the correct answer.

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The definition of astronomic bodies are indicated below with the sentences defining them.

Astronomic bodies are celestial objects that occur naturally in space.

Here are their definitions below:


a. Supernova exhibits strong gravitational pull such that no light can escape

b. A nebula a large cloud of gas or dust in space.

c. A white dwarf is what a medium-mass star becomes at the end of it's life.

d. Protostar is the earliest stage of a star's life.

e. Black dwarf is a star left at the core of a planetary nebula.

f. Neutron stars are the remains of a high mass star.

g. A supernova is what occurs when a red supergiant star explodes.

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Answer:40g of D

Explanation:

Law of conservation of matter:

Matter can neither be created nor be destroyed but can change from one form to another.

The total of the reactants must be equal to that of the product.

A+B=>C+D

50g+30=40g+D

80g=40g+D

D=80-40

D=40g

Both plant roots and lichens have the ability to produce weak acids that slowly dissolve rock in their immediate surroundings.

Plant roots secrete weak acids, such as organic acids, as a part of their growth process. These acids aid in the breakdown of minerals in the soil, facilitating the uptake of essential nutrients by the plants. As roots grow and extend into the soil, the weak acids they release can gradually dissolve minerals present in the rocks surrounding them. Over time, this process can contribute to the weathering and erosion of the rock material.

Similarly, lichens, which are symbiotic organisms consisting of a fungus and an alga or a cyanobacterium, also produce weak acids. Lichens can grow on rocks and other substrates, utilizing their acid-producing capabilities to extract nutrients and minerals from the rocks. The weak acids they release can slowly break down the mineral content of the rocks, contributing to physical and chemical weathering.

Both plant roots and lichens play a role in the process of bioerosion, where living organisms contribute to the breakdown and alteration of rocks. Their production of weak acids enables them to interact with and modify their surrounding environment, albeit on a relatively slow timescale.

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In order to find the missing value in this question, we need to use what is called the Combined Gas Law formula, which is formula that combines all three common gas laws, the formula is:

P1V1/T1 = P2V2/T2

We have:

P1 = 100 kPa

V1 = 2.0 L

T1 = 15°C, but we need it in Kelvin, 288 K

P2 = ?

V2 = 2.5 L

T2 = 273 K

Now we add these values into the formula:

100 * 2/288 = P2 * 2.5/273

0.6944 = 2.5P2/273

2.5P2 = 0.6944 * 273

2.5P2 = 189.57

P2 = 189.57/2.5

P2 = 75.828 kPa, we can round it to 76 kPa

The pressure will be 76 kPa

The pressure of dinitrogen difluoride gas in the reaction vessel after the reaction is approximately 0.976 atm.

To calculate the pressure of dinitrogen difluoride gas in the reaction vessel after the reaction, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

First, we need to calculate the number of moles of dinitrogen difluoride gas produced. We can use the molar mass of dinitrogen difluoride (NF2) to convert the mass of the gas to moles:

n = mass / molar mass

The molar mass of NF2 is:

molar mass of N = 14.01 g/mol

molar mass of F = 19.00 g/mol

molar mass of NF2 = (2 * molar mass of N) + (2 * molar mass of F) = 2 * 14.01 g/mol + 2 * 19.00 g/mol = 66.02 g/mol

n = 28 g / 66.02 g/mol = 0.4246 mol

Now we can substitute the values into the ideal gas law equation:

P * 35.0 L = 0.4246 mol * R * (10.0 + 273.15) K

Rearranging the equation to solve for P:

P = (0.4246 mol * R * (10.0 + 273.15) K) / 35.0 L

Using the ideal gas constant value R = 0.0821 L·atm/(mol·K), we can calculate:

P = (0.4246 mol * 0.0821 L·atm/(mol·K) * (10.0 + 273.15) K) / 35.0 L

P ≈ 0.976 atm

Therefore, the pressure of dinitrogen difluoride gas in the reaction vessel after the reaction is approximately 0.976 atm.

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Answer:

The hotter the substance, the more its molecules vibrate, and therefore the higher thermal energy

:)

Answer: Hot water has more thermal energy because the particles are farther apart thus they are moving faster. As particles move faster their thermal energy increases.

Explanation: Look in answer

Answer:

False.

I just got it right, lol.

The radius of a nickel atom in cm is 1.20 Å in the FCC crystal. To solve for the radius of a nickel atom, we can use the following equation:

r = 4r_c / 3

Where:

r is the radius of a nickel atom in cm

r_c is the edge length of the unit cell of nickel in cm

The edge length of the unit cell of nickel can be calculated using the following equation:

r_c = (3M / ρN_A)^1/3

where:

M is the molar mass of nickel in g/mol

ρ is the density of nickel in g/cm3

N_A is Avogadro's number

Plugging in the values for M, ρ, and N_A, we get:

r_c = (3(58.69 g/mol) / 8.90 g/cm3)^1/3 = 0.352 Å

Plugging in the value for r_c into the first equation, we get:

r = 4(0.352 Å) / 3 = 1.20 Å

Therefore, the radius of a nickel atom in cm is 1.20 Å.

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Answer:

Substance 1

Explanation:

Because if it becomes a solid BEFORE the other it means that the structure is more sound than the other substance. and if you add heat to something that becomes a solid it means it will come closer

I Hope this helps <3 and again i don't need the crown

Answer:

seismographs

Explanation:

Scientists use seismographs that record the length and strength of each earthquake to try to determine if an eruption is imminent. Magma and gas can push the volcano's slope upward.

Answer:c

Explanation:

As the combined mass of the HCl and NaOH is 15 grams before the reaction. Therefore the mass after the reaction will be 15 grams according to the law of conservation of mass. Therefore, option (C) is correct.

Matter can be transformed form via physical changes and chemical changes from one form to another form, during any of these changes, the total mass is conserved. The same quantity of matter exists before and after the chemical or physical as none of the matter is created or destroyed.

The balanced equation between the reaction of HCl and NaOH:

\(HCl +NaOH \longrightarrow H_2O +NaCl\)

According to the law of conservation of mass, the mass of HCl and NaOH will be equal to the mass of the products water and NaCl.

As mentioned in the question the combined mass of HCl and NaOH measured before the reaction is 15 grams. Therefore, the mass of the products in the closed container will be equal to 15 grams as well.

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Your question was incomplete,  most probably the complete question was,

Fernando places 15 ml of HCl and 50 ml of NaOH in 100 ml of a beaker. He places them on a scale together and measures the combined mass of 15 grams.

After the HCl and NaOH react, Fernando measures the mass again. Using the mass before the reaction, what is the mass after the reaction? Remember, It is in a closed system.

A. 5.00 grams

B. 10.00 grams

C. 15.00 grams

D. 20.00 grams

The percent sugar concentration in orange soda is approximately 13.24%.

The volume of orange soda is given as 355 mL and its density is given as 1.043 g/mL. According to the nutrition label, there are 49 g of sugar in a 355 mL serving of orange soda.Using the density, we can convert the 355 mL volume into grams as follows:Volume = 355 mL; Density = 1.043 g/mL; Mass = ?To convert mL to g we need to multiply the volume with the density. Thus,Mass = Volume x Density= 355 x 1.043= 369.965 gThus, the mass of a 355 mL serving of orange soda is approximately 369.965 g.Next, we can calculate the percentage of sugar in the beverage as follows:Percent sugar concentration = (Mass of sugar / Total mass of beverage) x 100%Percent sugar concentration = (49 g / 369.965 g) x 100%Percent sugar concentration = 0.1324 x 100%Percent sugar concentration = 13.24%Therefore, the percent sugar concentration in orange soda is approximately 13.24%.

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Answer:

Explanation:

Potential energy builds as the coaster is going up the loop-the-loop and converts to kinetic energy on the way down and out of the loop-the-loop. The potential energy of the coaster is at its lowest and the kinetic energy is at its highest as the coaster moves in the lowest point of the loop-the- loop.

Answer:

See below ~

Explanation:

1. C. solid

2. B. tone quality

3. C. pitch

4. D. capable of producing its own light

5. D. stars

Answer:

1. C. solids

2. B. tone quality

3. A. pitch

4. D. capable of producing its own light

5. D. stars