What is a positive Gibbs free-energy value an indication of?

an equilibrium reaction

a reversible reaction

an enzymatic reaction

a nonspontaneous reaction

Answer:

thermal energy is heat energy it is used for man kitchen appliances and also in nature from the sun for photosynthesys

Explanation:

Answer:

Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.

Answer:

Melting point

Explanation:

Melting point is a intensive property and Intensive properties can be used to help identify a sample because these characteristics do not depend on the amount of sample, nor do they change according to conditions.

IF IT WAS HELPFUL HIT THE CROWN

Answer:

Explanation:

Yes melting point!

Answer:

Preach!

Explanation:

A BCC unit cell with a lattice constant, a, of 2.4 Å. The volume atomic concentration of the unit cell is 0.0722 atoms/ų.

To determine the volume atomic concentration of a Body-Centered Cubic (BCC) unit cell, we need to consider the number of atoms present in the unit cell and the volume occupied by the unit cell.

In a BCC unit cell, there is one atom located at the center of the cube and eight atoms at the corners, but each corner atom is shared among eight adjacent unit cells. Therefore, the total number of atoms present in the unit cell is 1.

The volume of a BCC unit cell can be calculated using the formula:

Volume = a³

where "a" is the lattice constant.

Given that the lattice constant, a, is 2.4 Å, we can calculate the volume of the unit cell as follows:

Volume = (2.4 Å)³

Converting the units to cubic angstroms:

Volume = 13.824 ų

Now, to determine the volume atomic concentration, we need to divide the number of atoms (1) by the volume of the unit cell:

Volume Atomic Concentration = Number of Atoms / Volume

Volume Atomic Concentration = 1 / 13.824 ų

The volume atomic concentration of the BCC unit cell is approximately 0.0722 atoms/ų.

Therefore, the volume atomic concentration of the unit cell in a BCC crystal with a lattice constant of 2.4 Šis approximately 0.0722 atoms/ų.

To know more about lattice constant here

https://brainly.com/question/33343195

#SPJ4

The complete question is:

A BCC unit cell with a lattice constant, a, of 2.4 Å. Determine the volume atomic concentration of the unit cell.

Answer:

7:4

Explanation:

O2 : NO2

7 : 4

hope this helps :)

Answer:

push or pull

Explanation:

Answer:

there will be less and less space

Explanation:

Answer:

Liquid

Explanation:

We can rule out solids when there is no definite shape, so we have liquid and gas left. The thing is gas doesn't have a definite volume because we can't transfer it between two glass cups (this is an example). Thus, liquid is the state of matter in which a material has a definite volume but not a definite shape.

Answer:

It is and isn't possible at the same time.

Explanation:

Stars form when enough hydrogen collects in one place that the sheer gravitational attraction of the mass to itself causes thermonuclear fusion to commence. Unlike a nuclear bomb, the reaction doesn’t last for milliseconds, but for billions of years, as convection currents carry fresh supplies of unfused hydrogen into the reaction zone, and as heavier, already fused material undergoes fusion again, starting a stepladder of elemental construction, building the table of elements from hydrogen up toward iron as far as conditions will allow.  So basically, the sun doesn’t burn all at once for the same reason a candle doesn’t: It relies on convective processes to freshen its fuel supply

A patient is getting an IV infusion with 0.45% NaCl. If a patient receives needs 5 grams of NaCl,  1111.11 ml is the total solution that should be infused.

A homogenous mixture made up of two or more substances is referred to as a solution. The substance that is dissolved in the solvent is known as the solute, whereas the substance that is present in greater quantity is referred to as the solvent. Depending on the composition of the solute and solvent, solutions can be solid, liquid, or gaseous. In solution chemistry, a stable combination is produced by achieving a uniform dispersion of particles throughout the solvent. Solvents are used in this process to dissolve solutes.

0.45 grams NaCl / 100 ml = 5 grams NaCl / x ml

(0.45 grams NaCl) × x ml = (5 grams NaCl) * 100 ml

0.45x = 500

x = 500 / 0.45

x ≈ 1111.11 ml

To know more about solution, here:

https://brainly.com/question/1616939

#SPJ12

The appropriate dress for lab includes closed-toe shoes made of leather or other resistant material, nothing permeable like cotton or other fabric; clothes made of natural fibers (e.g. cotton or wool) that do not melt like synthetic fabrics; pants or long skirts that completely cover and protect your legs; and a fitted short- or long-sleeved shirt--nothing with loose sleeves that can knock down containers or catch fire.

It is important to wear appropriate clothing in a laboratory to protect yourself from potential hazards, such as chemical spills, fire, and other accidents. Clothing made of natural fibers can help reduce the risk of melting and burning in case of exposure to heat or chemicals. Closed-toe shoes made of durable materials provide protection against spills and falling objects. Avoiding loose clothing, such as halter or tank tops with micro-mini skirts, can prevent catching fire or knocking down containers. Insulated winter parka and gloves are not necessary for regular laboratory attire and may not be suitable for lab safety. It's always important to follow the dress code and safety guidelines of the specific laboratory you are working in to ensure proper protection.

To know more about Lab Attire:

https://brainly.com/question/7828998

#SPJ11

a.bond energy

c. endothermic reaction

d. exothermic reaction

f.exothermic

g.endothermic

Answer:

It is noticed that after five days, there is elongation of the root cells in the roots of onion in the jam bottle

Explanation:

It is noticed that after five days, there is elongation of the root cells in the roots of onion in the jam bottle. The growth of a plant is due to the availability of the growing and  dividing cells in the meristematic regions of the apical meristems. (stem cells). This site are active site for elongation and differentiation  of the stem tissues. In the apical meristem of the root cells, the cells have the potential to carry out mitosis and cell division repeatedly in order to generate newer cells for extension and development of stems and leaves. With each cell division, one cell remains in the meristem which the other increases in size and differentiate due to different genomic expression to form the meristem regions which eventually becomes the stem structure.

To calculate the molar mass of the unknown protein, we can use the formula for osmotic pressure:

π = (n/V)RT

where:

π is the osmotic pressure,

n is the number of moles of solute,

V is the volume of the solution in liters,

R is the ideal gas constant (0.0821 L·atm/(mol·K)), and

T is the temperature in Kelvin.

First, let's convert the given values to the appropriate units:

Mass of protein = 28.85 mg = 0.02885 g

Volume of solution = 29.0 mL = 0.0290 L

Osmotic pressure = 3.28 torr

Now, we rearrange the osmotic pressure formula to solve for n:

n = (πV) / (RT)

Substituting the values:

n = (3.28 torr * 0.0290 L) / (0.0821 L·atm/(mol·K) * 289 K)

n ≈ 0.0386 mol

Next, we can calculate the molar mass (M) of the protein using the formula:

M = mass / moles

M = 0.02885 g / 0.0386 mol

M ≈ 0.746 g/mol

Therefore, the molar mass of the unknown protein is approximately 0.746 g/mol.

Learn more about  osmotic pressure here:

https://brainly.com/question/29823250

#SPJ11

The correct product from this reaction is the structure in option D.

An amine is a compound that contains an alkyl group and an amino group. We know that we can obtain an amine from ammonia by replacing one or more hydrogen atoms with alkyl groups.

The compound as shown here is a secondary amine because two hydrogen atoms have been replaced with alkyl groups. We know that the reaction between the HCl and the amine produces an ionic compound owing to the fact that the nitrogen and the hydrogen from HCl are involved in a Dative bond.

As such, the correct product from this reaction is the structure in option D.

Learn more about amines:https://brainly.com/question/3567414

#SPJ1

The mass of (NH4) 2S in the solution is : Mass = 0.0600 mol × 60.08 g/mol = 3.60 g.

The given molarity and volume of the solution can be used to calculate the number of moles of ammonium sulfide (NH4)2S.Then, the number of moles can be converted to mass using the molar mass of (NH4)2S.Mass of ammonium sulfide (NH4)2S in 3.00 L of a 0.0200 M solution is given by : Mass = moles × molar mass.The number of moles of (NH4)2S can be found using the equation:Molarity = Number of moles / Volume.Rearranging this equation, we get:Number of moles = Molarity × Volume Number of moles of (NH4)2S = 0.0200 M × 3.00 L.Number of moles of (NH4)2S = 0.0600 mol.The molar mass of (NH4)2S can be calculated by summing the molar masses of ammonium (NH4) and sulfide (S) ions.Molar mass of (NH4)2S = (2 × Molar mass of NH4) + Molar mass of S= (2 × 14.01 g/mol) + 32.06 g/mol= 60.08 g/mol.

For more question on mass

https://brainly.com/question/1838164

#SPJ8

Answer:

False

Explanation:

It is impossibke to know the exact location of an electron.

The density of the metal cube will be .its mass divided by 2.8.

The density of a substance is the ratio of the weight of the substance and its volume.

Also, a solid object will always displace its own volume when dropped into a liquid.

Thus, the volume of the metal cube will be the difference in the readings of the graduated cylinder before and after dropping the metal cube into it.

Volume of the metal cube = 20.3 mL - 17.5 mL

                                      = 2.8 mL

The mass of the metal cube is not given.

Thus

Density of the cube = mass of the cube/2.8

More on density can be found here: https://brainly.com/question/15164682

#SPJ1

Answer:

bro Ur in my school lol

Explanation:

Answer:

Explanation:

There will be no attractive or repulsive force between the two types of magnets. its A i took this quiz and got it correct. ^^

the answer is Ethane

hope it helps...!!!

the answer is Ethane

hope it helps...!!!

To calculate the equivalent weight of 4-toluic acid (CH3C6H4COOH), you first need to find its molecular weight. The molecular weight is the sum of the atomic weights of all the atoms in the molecule.

For 4-toluic acid:
Carbon (C) = 8 atoms × 12.01 g/mol = 96.08 g/mol
Hydrogen (H) = 8 atoms × 1.01 g/mol = 8.08 g/mol
Oxygen (O) = 2 atoms × 16.00 g/mol = 32.00 g/mol

Now, add the weights together:
96.08 g/mol + 8.08 g/mol + 32.00 g/mol = 136.16 g/mol

The equivalent weight is the molecular weight divided by the number of replaceable hydrogen atoms in the acid, which in the case of 4-toluic acid is 1 (from the -COOH group):

Equivalent weight = 136.16 g/mol / 1 = 136.16 g/mol

So, the equivalent weight of 4-toluic acid is 136.16 g/mol.

Learn more about  equivalent weight  here:

https://brainly.com/question/1542991

#SPJ11

The pressure (in atm) of hydrogen gas in the 20.0 L headspace of a reactor vessel when 3.36 kg sodium is reacted with excess water at 50.0 °C can be calculated using the ideal gas law, which states that the pressure, volume, and temperature of a gas are related by the equation PV = nRT, where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature of the gas in Kelvin.

To calculate the pressure of the hydrogen gas, we first need to determine the number of moles of hydrogen gas produced by the reaction. We can do this by using the balanced chemical equation for the reaction, which is 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g).

From the balanced chemical equation, we can see that for every 2 moles of sodium that react, 1 mole of hydrogen gas is produced. Therefore, if 3.36 kg of sodium is reacted with excess water, the number of moles of hydrogen gas produced is 3.36 kg / (22.99 g/mol) = 146.4 moles.

Next, we need to convert the temperature of the gas from degrees Celsius to Kelvin. This can be done by adding 273.15 to the temperature in Celsius, which gives us a temperature of 50.0 + 273.15 = 323.15 K.

Now that we have the number of moles of hydrogen gas and the temperature of the gas, we can plug these values into the ideal gas law equation to calculate the pressure of the hydrogen gas:

P = (nRT) / V

P = (146.4 mol * 0.08206 L*atm / mol*K * 323.15 K) / 20.0 L

P = 4.31 atm

Therefore, the pressure (in atm) of hydrogen gas in the 20.0 L headspace of a reactor vessel when 3.36 kg sodium is reacted with excess water at 50.0 °C is 4.31 atm.

Answer:

a.

\([H _{3}O {}^{ + } ] = 4.23 \times {10}^{ - 3} M\)

b.

\([OH {}^{ - } ] = \frac{kw}{[H {}^{ + } ]} \\ [OH {}^{ - } ] = \frac{1 \times {10}^{ - 14} }{4.23 \times {10}^{ - 3} } \\ [OH {}^{ - } ] = 2.36 \times {10}^{ - 12} M\)

c.

\(pH = - log[H {}^{ + } ] \\ pH = - log(4.23 \times {10}^{ - 3} ) \\ pH = 2.37\)

d.

\(pOH = - log[OH {}^{ - } ] \\ = - log(2.36 \times {10}^{ - 12} ) \\ = 11.63\)

Answer:

CaCO3

Explanation:

Pure calcite has the composition CaCO3. However, the calcite in limestone often contains a few percent of magnesium. Calcite in limestone is divided into low-magnesium and high-magnesium calcite, with the dividing line placed at a composition of 4% magnesium. High-magnesium calcite retains the calcite mineral structure, which is distinct from that of dolomite, MgCa(CO3)2.[18] Calcite can also contain small quantities of iron and manganese.[19] Manganese may be responsible for the fluorescence of impure calcite, as may traces of organic compounds

Explanation:

Acids and alkalis both contain ions. Acids contain lots of hydrogen ions, which have the symbol H+. Alkalis contain lots of hydroxide ions, symbol OH-. Water is neutral because the number of hydrogen ions is equal to the number of hydroxide ions

Answer:

cids and bases both react with water and a lot of acids and bases are soluble in nature. Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH–).

Explanation: