Which equation is correct?
A) mechanical energy = kinetic energy-potential energy
B) mechanical energy = potential energy - kinetic energy
C) mechanical energy = kinetic energy + potential energy
D) mechanical energy = kinetic energy x potential energy
Pls help I’m dying

Rhyolitic magma composition of magma is produced by melting at lower temperatures.

Under the surface of the Earth, molten and semi-molten rock mixtures are known as magma. This mixture typically consists of four components: a hot liquid base substance known as the melt; minerals that the melt crystallized; solid rocks that the melt mixed with from the surrounding confines; and dissolved gases. The lowest melting point among the various types of magma is found in rhyolitic magma. Iron, magnesium, and calcium are scarce in this type of magma, which is high in potassium and sodium.

As the magma's temperature rises, its viscosity decreases, making lower temperature magmas more viscous than higher temperature ones.

Learn more about Rhyolitic magma at:

brainly.com/question/1069670

#SPJ4

The given statement "atomic size decreases across a period due to an increase in the effective nuclear charge, Zeff" is true because Zeff causes the valence electrons to be more strongly attracted to the nucleus resulting in decreased atomic size.

As you move across a period, the number of valence electrons in the outermost shell increases, but the number of energy levels or shells remains the same. This means that the electrons are being added to the same shell and are therefore at roughly the same distance from the nucleus. However, the effective nuclear charge (Zeff) increases across the period due to the increasing number of protons in the nucleus. This causes the valence electrons to be more strongly attracted to the nucleus and held more tightly, resulting in a decrease in atomic size across the period.

Therefore the given statement "atomic size decreases across a period due to an increase in the effective nuclear charge, Zeff" is true.

To learn more about periodic properties refer to: https://brainly.com/question/31232139

#SPJ11

Answer:

it is placed over a bunsen burner to heat up and remove all bacteria

Explanation:

The sample of helium gas must be cooled to approximately -220°C to reduce its volume from 5.9 L to 0.2 L at constant pressure.

According to the ideal gas law, the relationship between the volume (V), temperature (T), and pressure (P) of a gas can be expressed as PV = nRT, where n is the number of moles of the gas and R is the ideal gas constant. In this case, the pressure is constant, so we can simplify the equation to V/T = constant.

To find the final temperature required to reduce the volume from 5.9 L to 0.2 L, we can set up the following ratio:

(V1 / T1) = (V2 / T2)

Where V1 is the initial volume (5.9 L), T1 is the initial temperature (119°C + 273.15 = 392.15 K), V2 is the final volume (0.2 L), and T2 is the final temperature that we need to find.

Rearranging the equation, we have:

T2 = (V2 / V1) * T1

= (0.2 L / 5.9 L) * 392.15 K

≈ 13.28 K

Converting 13.28 K back to Celsius, we get:

T2 ≈ -259.87°C

Therefore, the sample of helium gas must be cooled to approximately -220°C (or -259.87°C) to reduce its volume from 5.9 L to 0.2 L at constant pressure.

The question should be:

To what temperature must a sample of helium gas be cooled from 119°C to reduce its volume from 5.9 L to 0.2 L at constant pressure?

To learn more about ideal gas law, Visit:

https://brainly.com/question/27870704

#SPJ11

Answer:

Gylcerol Back Bone

Carbons and Hydrogens

Explanation:

Discovering the effect of caffeine on heart rate. The Independent Variable is caffeine, dependent Variable is heart beat, Control is group given no caffeine and constant is same amount of caffeine.

Independent variable is defined as varible which is changed by the experimenter.

Dependent variable is defined as those variable which depends on the independent variable.

It is defined as that group which do not receive experimental treatment.

It is that variable which is kept unchanged for all types of groups in the experiment.

Thus, we concluded that the the Independent Variable is caffeine, dependent Variable is heart beat, Control is group given no caffeine and constant is same amount of caffeine.

learn more about Variables:

https://brainly.com/question/1479694

#SPJ9

Answer:

Rubidium Chloride is an excellent water soluble crystalline Rubidium source for uses compatible with chlorides.

Compound Formula: ClRb

Melting Point: 715 °C

Boiling Point: 1,390 °C

Explanation:

Answer:

That is, the molar mass of a substance is the mass (in grams per mole) of 6.022 × 10 23 atoms, molecules, or formula units of that substance. In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively.

Answer:

The molar mass of a substance is the mass (in grams per mole) of 6.022 x \(10^{23}\) atoms, molecules, or formula units of that substance.

Explanation:

In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively.

There is approximately 3.28 grams of NaCl contained in 450 mL of a 0.125 M solution of sodium chloride.

To calculate the grams of NaCl in the solution, we need to use the formula:

grams of NaCl = moles of NaCl * molar mass of NaCl

First, let's calculate the moles of NaCl using the formula:

moles of NaCl = concentration of NaCl * volume of solution

Given:

Concentration of NaCl = 0.125 M

Volume of solution = 450 mL = 450/1000 = 0.45 L

moles of NaCl = 0.125 M * 0.45 L

moles of NaCl = 0.05625 mol

The molar mass of NaCl is approximately 58.44 g/mol.

Now, let's calculate the grams of NaCl:

grams of NaCl = 0.05625 mol * 58.44 g/mol

grams of NaCl ≈ 3.28 g

Learn more about Concentration  from :

https://brainly.com/question/17206790

#SPJ11

Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1

What is Rate of Reaction?

The rate of reaction in a chemical reaction is the speed at which the products are formed from the reactants. It helps us comprehend how rapidly a reaction might happen. For instance, cellulose burns exceedingly quickly in fire and the process is complete in less than a second.

The rate of reaction, also known as reaction rate, is the rate at which reactants transform into products. It should go without saying that different chemical reactions occur at different rates. While certain chemical reactions take place extremely immediately, others usually take some time to reach their final equilibrium.

Rate of reaction = k [NH 3] x [NO] y, where k is the reaction's rate constant, x is the order of the reaction with respect to NH 3, and y is the order of the reaction with respect to NO

Rate of reaction = k [NH 3 ] [ NO ]  

Rate constant of reaction at 1200 K : 1.20 times 10 9 M -1 s -1

Learn more about Rate of Reaction from given link

https://brainly.com/question/12904152

#SPJ4

Jake having recently purchased a new computer, jake will invest in Anti-spyware software  that will protect his computer from data corruption, pop-up ads, hackers, identity theft, and other online-related threats.

Anti-spyware is a type of software used to find and get rid of unwanted spyware programs. A form of malware known as spyware is placed on a computer without the user's knowledge in order to collect information about them. Although there may be a security risk for the user as a result, spyware more frequently reduces system speed by using processing power, installing software, or redirecting users' browser activity.

Anti-spyware software identify spyware through definition files that have been downloaded or through rule-based detection methods. Anti-spyware software can be used to find and remove spyware that has already been downloaded and placed on the user's computer, or it can function similarly to an anti-virus application by providing real security and preventing spyware from ever being downloaded.

So, Jake will spend money on anti-spyware software to protect his computer against malware such as hackers, pop-up advertising, data loss, and identity theft.

To learn more about Anti-spyware :

https://brainly.com/question/14594836?referrer=searchResults

#SPJ4

The water molecules are split into hydrogen and oxygen gases by the electric current. Then, the gases of hydrogen and oxygen are released into the environment. Electrolysis is the name of this procedure.

The water molecules are disassembled by electrolysis using electricity into their component elements of hydrogen and oxygen, which are subsequently liberated as gases.

A procedure called electrolysis employs electric current to separate a substance into its constituent parts. In electrolysis, an electric current is used to drive ions in a solution towards electrodes, where they combine to generate a new molecule. The method is generally used to refine metals and other chemicals as well as to extract metals from their ores.

For more Questions on electrolysis click on

https://brainly.com/question/12994141

#SPJ4

Answer:

the answer is 58.5g

Explanation:

23+35.5=58.5g

Answer:

Please find the definition and example of neutralization reaction below

Explanation:

In chemistry, neutralization reaction is a type of reaction involving a base and an acid to form salt and water. In other words, when an acid and a base comes together chemically to form a salt and water, a neutralization reaction is said to occur.

For example; in a reaction between sodium hydroxide (NaOH) and hydrogen chloride (HCl) as follows:

HCl(aq) + NaOH(aq) → NaCl(s) + H2O(l)

In this neutralization reaction, the HCk is the acid while the NaOH is the base (reactants). For the products, the NaCl is the salt while H2O is water.

Marie Curie determined that the radioactivity of radium was greater than that of thorium or uranium and more powerful than what had been observed in any known substance at that time.

Radioactivity is the procedure by which atomic nuclei emit particles. Radiation, which is an unstable arrangement of atomic nuclei, decays, emitting small subatomic particles and/or electromagnetic waves. It was discovered in 1896 by French physicist Henri Becquerel, who discovered that a uranium salt crystal that had been positioned next to photographic plates that had been wrapped in dark paper caused the plates to be darkened.

The presence of radium was discovered by Marie Curie and her husband Pierre Curie. They used the recently discovered process of radioactivity to discover this element in 1898, and its radioactive character was soon recognized.

Hence, They discovered that radium generated considerable quantities of heat, making it a powerful source of energy.

To know more about Radium refer here :

https://brainly.com/question/2378297

#SPJ11

(a) Subtract the total production costs (including raw materials and by-product values) from the product value. This will give you the profit upper bound for each route.

(b)  You would decrease the value assigned to acetone until the PUB values for both routes become equal.

(c) To precisely quantify this effect, you would need to consider the energy consumption, pricing of utilities, and the specific context of the production facility.

a) To calculate the profit upper bound (PUB) for the two routes to phenol, we need to consider the production costs and the market prices of the relevant chemicals involved. Since I don't have access to real-time chemical price information, I won't be able to provide specific values for this calculation. However, I can guide you through the process and explain the factors you need to consider.

Assumptions:

We will assume that the oxidation processes for cumene and toluene are carried out efficiently, without any significant losses or process inefficiencies.

The prices of the chemicals involved are assumed to be constant and known.

Here are the general steps to calculate the profit upper bound for the two routes:

Determine the cost of raw materials: Find the current market prices for cumene, toluene, acetone, water, and carbon dioxide. Multiply the prices by the quantities of these materials required in each route to obtain the raw material costs.

Account for the by-products: In the oxidation of cumene, acetone is produced as a by-product. Determine the market price of acetone and subtract it from the raw material costs for cumene oxidation. In the oxidation of toluene, water and carbon dioxide are the by-products. However, since their prices are typically negligible compared to phenol, we can ignore their values in this calculation.

Calculate the product value: Find the current market price of phenol.

Calculate the PUB: Subtract the total production costs (including raw materials and by-product values) from the product value. This will give you the profit upper bound for each route.

b) To make the two routes have equal PUB values, you would need to equate the profit margins by adjusting the value of acetone. Let's assume that the PUB for the oxidation of cumene to phenol is higher. In this case, you would decrease the value assigned to acetone until the PUB values for both routes become equal.

c) To calculate the overall change in enthalpy based on the stoichiometry of the reactants and products, you would need the balanced chemical equations for the oxidation of cumene and toluene to phenol. Once you have the balanced equations, you can calculate the enthalpy change (ΔH) using standard enthalpies of formation for the compounds involved.

After calculating the enthalpy change, you can convert it to energy units using the given conversion factor of $2/MMBtu. If the reaction is exothermic (negative ΔH), you would gain this value, and if it is endothermic (positive ΔH), you would pay this value.

The alteration of PUB values due to the energy valuation depends on the scale of the production process and the energy costs involved. To precisely quantify this effect, you would need to consider the energy consumption, pricing of utilities, and the specific context of the production facility.

Please note that the actual PUB values and the impact of energy valuation would require up-to-date market prices and specific process information.

To know more about the word oxidation, visit:

https://brainly.com/question/16976470

#SPJ11

When solutions of ammonium fluoride and potassium hydroxide are combined, the odor that is produced is ammonia. This is because ammonium fluoride is a salt that contains ammonium ions, which can release ammonia gas when combined with a strong base like potassium hydroxide.

The strong base causes the ammonium ions to deprotonate, releasing ammonia gas and forming water and fluoride ions. The ammonia gas has a strong, pungent odor that is often described as being similar to that of cleaning products or cat urine. It is important to handle these chemicals with care and in a well-ventilated area to avoid inhaling the noxious fumes.
The odor detected when solutions of ammonium fluoride (NH4F) and potassium hydroxide (KOH) are combined is ammonia (NH3). This reaction occurs because ammonium fluoride reacts with potassium hydroxide, producing ammonia gas, potassium fluoride (KF), and water (H2O). Ammonia has a distinct, pungent smell, often described as sharp or somewhat unpleasant. This gas is commonly used in cleaning products and as a fertilizer, but in high concentrations, it can be hazardous to human health.

To know about ammonium:

https://brainly.com/question/11173657

#SPJ11

Answer:

Explanation:

Crystalline solids have well-defined edges and faces, diffract x-rays, and tend to have sharp melting points. In contrast, amorphous solids have irregular or curved surfaces, do not give well-resolved x-ray diffraction patterns, and melt over a wide range of temperatures.

The number of moles of the cyclopropane that remains after 1.00 s is  6.1 * 10^-4 M.

By the use of the equation of the first order reaction, we can be able to find out the concentration at a given time.

The equation of the first order reaction can be written as;

ln[A] = ln[Ao] - kt

[A] = Concentration at time t

[Ao] = Initial concentration

k = rate constant

t = time

Then;

[A] = e^ln[Ao] - kt

[A] = e^ln6.00 - (9.2 * 1)

[A] = 6.1 * 10^-4 M

The amount of the cyclopropane left is  6.1 * 10^-4 M.

Learn more about first order reaction :https://brainly.com/question/12446045

#SPJ1

The value of Delta S for the reaction N2(g) + O2(g) → 2NO is -7.4 J/K.

The value of Delta S for the reaction N2(g) + O2(g) → 2NO is -7.4 J/K. Delta S is the change in entropy of a system. The formula used to find the change in Gibbs free energy, Delta G, is Delta G = Delta H - TDelta S, where Delta H is the change in enthalpy of the system, T is the temperature, and Delta S is the change in entropy of the system.

Using Delta G = Delta H - TDelta S, we can rearrange the formula to find Delta S:

Delta G = 173.3 kJ

Delta H = 180.7 kJ

T = 303.0 K

Delta G = Delta H - TDelta S

173.3 kJ = 180.7 kJ - (303.0 K)(Delta S)

Delta S = (-7.4 J/K)

Therefore, the value of Delta S for the reaction N2(g) + O2(g) → 2NO is -7.4 J/K.

To learn more about energy visit;

https://brainly.com/question/1932868

#SPJ11

To determine whether each statement about rain or acid rain is true or false. Please find the evaluation of each statement below:

1. There is more acid rain in the Western vs. Eastern United States.
False. There is more acid rain in the Eastern United States due to higher concentrations of sulfur oxides and nitrogen oxides from industrial activities and power plants.

2. Unpolluted rain water is acidic and approximately 3.6 on the pH scale.
False. Unpolluted rainwater is slightly acidic with a pH of around 5.6. This is due to the natural presence of carbon dioxide in the atmosphere, which dissolves into water and forms carbonic acid.

3. Sulfur oxides and nitrogen oxides in the troposphere cause acid rain.

True. Sulfur oxides (SOx) and nitrogen oxides (NOx) are released from various sources like industrial processes, power plants, and vehicle emissions. These gases react with water, oxygen, and other substances in the troposphere to form sulfuric acid and nitric acid, which then fall to the earth as acid rain.

To know more about acid rain refer here:

https://brainly.com/question/26775834

#SPJ11

Solubility rules are used to predict the outcome of precipitation reactions, which involve the formation of insoluble products.

Solubility rules are guidelines that help predict the solubility of different compounds in water. These rules are based on the general principles of ionic interactions and the solubility of common ionic compounds. When two soluble compounds are mixed together, a precipitation reaction may occur if the resulting compound formed is insoluble in water.

In precipitation reactions, the reactants are typically aqueous solutions of two different compounds. The solubility rules are used to determine if a precipitate will form by identifying the combination of ions that can form an insoluble compound. The rules state that certain combinations of ions will result in the formation of insoluble products, while others will remain soluble in water.

In conclusion, solubility rules are used to predict precipitation reactions, which involve the formation of insoluble products. These rules help determine whether certain combinations of ions will result in the formation of a precipitate or if the compounds will remain soluble in water. By understanding the solubility properties of different ions, scientists and chemists can predict the outcome of chemical reactions and better understand the behavior of substances in solution.

To learn more about Solubility refer:

https://brainly.com/question/23946616

#SPJ11

A dark ale that is sweet, strong, and hosts a malt flavor is known as a(n) b. stout.

Ale is a type of beer that is brewed using a warm fermentation method, typically at temperatures between 15-25°C (59-77°F). It is made with a type of yeast called Saccharomyces cerevisiae, which ferments at the top of the fermentation vessel and gives ale its characteristic fruity and floral notes.

Ales can range in color from light yellow to dark brown, and in flavor from light and refreshing to rich and complex. Some popular types of ales include pale ale, India pale ale (IPA), brown ale, and porter.

Ales are often served at cellar temperature (around 12-14°C or 54-57°F) and can be enjoyed on their own or paired with a variety of foods, such as cheese, grilled meats, and spicy dishes.

Visit here to learn more about beer brainly.com/question/17402817

#SPJ11

Answer:

5

Explanation:

The most stable resonance structure if nitrogen is the central atom in the CNO⁻ ion is seen in the first structure in the image attached below.

Resonance structures show the different forms of lewis structure in which a compound can exist whether as a stable resonance or an unstable resonance. It also explains the electronic bonding existing in a polyatomic compound with its bonds and charges.

The structure carrying the negative charge on the most electronegative atom is the most stable structure in resonance structures.

In the given compound CNO⁻, the lewis structure in which the resonance can exist is shown in the image attached below.

The first structure is the most stable because the negative charge is on the most electronegative element (oxygen).

The second structure has a (-2) oxidation state with two non-bonding electron pairs.

The third structure has a positive oxidation charge the electronegative oxygen which also makes it unstable.

Learn more about resonance structure here:

https://brainly.com/question/23287285?referrer=searchResults

Explanation:

density can be calculated using the following rule: density=mass/volume

therefore,

mass = density x volume

we have density 8.9gm/cm³ and volume=3cm³ substituting in the above equation, we can calculate the mass as follows:

mass = 8.9 x 3 = 26.7 grams,

Approx 27 grams

27 g is your answer

Answer:

density =8.9g/cm³

Explanation:

1cm³=8.9g

3cm³=8.9×3=26.7g