when molecules move they react by cooling down.
True or False?

Answer:

56.58 percent

(a) To get the pH of the media to 5.8, you would add NaOH solution. NaOH is used as a basic solution, and when it is added to a solution, it will increase the pH of the solution.

(b) The molecular weight of BA is 225.3. To prepare a 1M solution, you would have to weigh out 225.3 grams of BA.(c) To convert a 1M solution of BA to mg/mL, you can use the following equation: 1 mole = molecular weight in grams; 1000 millimoles = 1 mole. So, 1 M = 1000 mg/mL. Therefore, a 1M solution of BA is equivalent to 1000 mg/mL .(d) To convert a concentration of 1000 mg/mL .

Therefore, to calculate the weight required for a 5 mM solution, use the following formula :Mass of BA = molarity × volume × molecular weight= 5 × 0.001 × 225.3= 1.1265 grams(f) To convert a concentration of 5 mM to mg/mL, we use the following formula: Concentration (mg/mL) = (Concentration (mM) × Molecular weight) / 1000= (5 × 225.3) / 1000= 1.1265 mg/mL(g)

To convert a concentration of 1.1265 mg/mL to mg/L, we multiply by 1000, so 1.1265 mg/mL = 1126.5 mg/L.(h) Given that the stock solution of BA is 5 mM and the working solution is 0.2 mg/mL.

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Answer:

Nonmetals lose electrons to gain a negative charge and form anions, whereas metals lose electrons to gain a postive charge and form cations.

Atoms that gain or lose electrons are called ions and can have a negative charge or a postive charge.

Explanation:

Explanation:

To find the freezing point of the solution, we can use the freezing point depression equation:

ΔT = Kᵣ x m

Where ΔT is the change in freezing point, Kᵣ is the freezing point depression constant of benzene, and m is the molality of the solution.

Substituting the values from the problem, we get:

ΔT = 5.12 °C/m x 2.8 m

ΔT = 14.34 °C

Since ΔT = Tᵢ - T, where Tᵢ is the freezing point of the solvent (benzene) and T is the freezing point of the solution, we can rearrange the equation to solve for T:

T = Tᵢ - ΔT

T = 5.50 °C - 14.34 °C

T = -8.84 °C

Therefore, the freezing point of the solution is -8.84 °C.

Answer:The freezing point of the solution is -8.84 °C.

Explanation:

Answer:Accuracy Thermometers used to measure the temperature of food need to be accurate to +/-2°F or +/-1°C. Thermometers used to measure air temperature in food storage equipment need to be accurate to +/-3°F or +/- 1.5°C. A hanging thermometer in a walk-in cooler is an example.

Explanation:

Answer:all of the above all of that can speed up a chemical reaction

Answer: concentration

Explanation:

Answer:

Explanation:

specific heat capacity of mercury is approximately 0.14 J/g°C.

we can use the formula:

q = mcΔT

Where:

q = heat absorbed (in joules)

m= mass of the substance(gms)

c = specific heat capacity (in J/g°C)

ΔT = change in temperature (in °C)

In this case, we are given:

q = 455 J

m = 25.0 g

ΔT = (155°C - 25°C) = 130°C

Let’s solve for c by rearranging the formula as:

c = q / (m * ΔT)

Substituting the given values:

c = 455 J/(25.0 g * 130°C)

c = 0.14 J/g°C

Hence we can say that the specific heat capacity of mercury is approximately 0.14 J/g°C.

There are 50.0 mL of solution in 0.0500 L. this was found by using conversion factor formula for conversion from liters to milliliters.

To convert from liters to milliliters, we use the conversion factor:

1 L = 1000 mL

So, to convert 0.0500 L to milliliters, we can multiply by 1000:

0.0500 L * 1000 mL/L = 50.0 mL

Therefore, the answer is A) 50.0 mL.

A liter (L) is a unit of volume in the metric system, which is used in most countries around the world. It is defined as the volume of a cube with sides of 0.1 meter (10 centimeters, or 100 millimeters). One liter is equal to 1,000 milliliters (mL) or 0.001 cubic meters (m³). The liter is commonly used to measure the volume of liquids, such as water, milk, and juice, as well as the volume of some solids and gases.

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Answer:

See explanation

Explanation:

The question is incomplete because the image of the alcohol is missing. However, I will try give you a general picture of the reaction known as hydroboration of alkenes.

This reaction occurs in two steps. In the first step, -BH2 and H add to the same face of the double bond (syn addition).

In the second step, alkaline hydrogen peroxide is added and the alcohol is formed.

Note that the BH2 and H adds to the two atoms of the double bond. The final product of the reaction appears as if water was added to the original alkene following an anti-Markovnikov mechanism.

Steric hindrance is known to play a major role in this reaction as good yield of the anti-Markovnikov like product is obtained with alkenes having one of the carbon atoms of the double bond significantly hindered.

Taking into account the Newton's second law, the correct answer is option A. F = 9.68 N right

In first place, acceleration in a body occurs when a force acts on a body.

Newton's second law states that a force will change the speed of an object because the speed and/or direction will change. These changes in velocity are called acceleration.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object

Mathematically, Newton's second law is expressed as:

F= m×a

where:

In this case, you know:

Replacing in Newton's second law:

F= 2.2 kg× 4.4 m/s²

Solving:

F= 9.68 N

Finally, As the bowl of fruit accelerates to the right, the correct answer is option A. F = 9.68 N right

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The ionic bond is the type of chemical bond that joins sodium and chlorine.

When sodium and chlorine react, electrons are transferred from the sodium atom to the chlorine atom, resulting in the formation of positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-). These ions are then attracted to each other due to their opposite charges, forming an ionic bond. This bond is relatively strong and requires a significant amount of energy to break. Ionic compounds such as sodium chloride (NaCl) have high melting and boiling points, and are typically crystalline solids at room temperature.

In an ionic bond, electrons are transferred from one atom to another. This results in the formation of positively charged cations and negatively charged anions, which are then attracted to each other by electrostatic forces, forming an ionic compound. In the case of sodium and chlorine, sodium has one valence electron in its outermost shell, while chlorine has seven electrons in its outermost shell. Sodium easily loses its outer electron to achieve a stable octet configuration, while chlorine readily accepts an additional electron to achieve a stable octet. This results in the formation of Na+ and Cl- ions, respectively, which are then attracted to each other due to their opposite charges.

Ionic compounds have a regular, repeating arrangement of ions called a crystal lattice. They typically have high melting and boiling points, as the strong electrostatic attractions between the ions require a lot of energy to overcome. Ionic compounds are generally soluble in polar solvents such as water, but not in nonpolar solvents. They also conduct electricity when dissolved in water or when melted, as the charged ions are free to move and carry electrical charge.

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Answer:

I believe the answer is A (changes in air temperature  result in differences in air pressure which causes wind). Hope this helps

Explanation:

Answer:

Producers.

Explanation:

Since the source of energy is the sun, the trophic level representing producers contains the most energy.

Answer:

I belive the answer is D

Answer:

Without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body

Explanation:

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

A.) 1:1

Explanation:

You can determine the mole ratio between substances by comparing their coefficients in the balanced equation. Both Cl₂ and Br₂ have coefficients of 1. Therefore, they have a 1 to 1 (1:1) relationship.

If you were comparing the mole ratio of Cl₂ and NaBr, they would have a 1:2 relationship because Cl₂ has a coefficient of 1 and NaBr has a coefficient of 2.

Answer:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The total ionic equations shows the equation in which all the species of the reactants and the products are in dissociated form and are represented as ions.

The net ionic equations shows the equation in which all the species of the reactants and the products are in dissociated form and do not show the spectator ions which are same in the reactants and the products.

a) zinc nitrate + calcium sulphide \(\rightarrow \) zinc sulphide + calcium nitrate

balance equation : \(Zn(NO_3)_2(aq)+CaS(aq)\rightarrow ZnS(s)+Ca(NO_3)_2(aq)\)

total ionic equation :

\(Zn^{2+}(aq)+2NO_3^-(aq)+Ca^{2+}(aq)+S^{2-}(aq)\rightarrow ZnS(s)+Ca^{2+}(aq)+2NO_3^-(aq)\)

net ionic equation :

\(Zn^{2+}(aq)++S^{2-}(aq)\rightarrow ZnS(s)\)

b) potassium + calcium chloride  \(\rightarrow \) potassium chloride + calcium

balance equation : \(2K(s)+CaCl_2(aq)\rightarrow 2KCl(aq)+Ca(s)\)

total ionic equation :

\(2K(s)+Ca^{2+}(aq)+2Cl^-(aq)\rightarrow 2K^+(aq)+2Cl^-(aq)+Ca\)

net ionic equation: \(2K(s)+Ca^{2+}(aq)+\rightarrow 2K^+(aq)++Ca\)

the probability is 0.84 or 84%.

a) The probability that a cell has at least one of the positive nickel charged options can be found by adding up the proportions of nickel in states 2, 3, and 4: 0.35 + 0.37 + 0.16 = 0.88. Therefore, the probability of a cell having at least one of these positive nickel charged options is 0.88.
b) The probability that a cell is not composed of a positive nickel charge greater than 3 can be found by adding up the proportions of nickel in states 0, 1, 2, and 3: 0.12 + 0.35 + 0.37 + 0.16 = 1. Therefore, the probability of a cell not having a positive nickel charge greater than 3 is 1. In a NiCd battery, the fully charged cell consists of nickel hydroxide, with nickel having multiple oxidation states. Given the nickel charge proportions, we can answer the following:
a) The probability that a cell has at least one positive nickel charge (2, 3, or 4) can be calculated by adding the proportions of the positive charges: 0.35 (2) + 0.37 (3) + 0.16 (4) = 0.88. So, the probability is 0.88 or 88%.
b) The probability that a cell is not composed of a positive nickel charge greater than 3 (only charges 0, 2, or 3) can be calculated by adding their proportions: 0.12 (0) + 0.35 (2) + 0.37 (3) = 0.84. Thus, the probability is 0.84 or 84%.

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Answer: green house affect is the sun on plants it is transfering energy to the plants to help them grow same with every plant, tree, fruit tree. everything needs sun.

Explanation:  look up there.

Answer:

The greenhouse effect is the warming of climate that results when the atmosphere traps heat radiating from Earth towards space. Certain gases in the atmosphere allow sunlight to pass into the "greenhouse effect," but blocking Earth's from escaping into space. Basically, greenhouse gases are airborne chemicals that contribute to the greenhouse effect by absorbing infrared radiation

Explanation:

Hope this helps

Answer: The hydroxide cation (OH -) and the phosphate cation (PO 4 3-) are both polyatomic ions.

Explanation:

Answer:

OH - and PO 4 3- are both polyatomic ions

Answer:

B

Explanation:

Valence electrons only involve in chemical bonding, since they are farthest from the nucleus. Hope this helps!

Because it improves food preservation and breaks down the sugars in the dough, the dough is fermented and proofed.

The ideal temperature for fermentation is 85° F.

What is fermentation?

Anaerobic degradation of molecules like glucose occurs chemically during fermentation.

What is proofing?

When making yeast bread and other baked goods, the process of proving involves letting the dough rest and rise one last time before baking. While the dough is resting, yeast ferments it and releases gases, leavening the dough.

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When the core of a star like the sun uses up its supply of hydrogen for fusion, the core begins to shrink but maintains a constant temperature.

The core of a star like the sun is where hydrogen fusion takes place. During this process, hydrogen atoms combine to form helium, releasing a large amount of energy in the form of heat and light. However, the supply of hydrogen in the core is not infinite, and eventually, the core will run out of hydrogen fuel.

When this happens, the core of the star begins to shrink due to the gravitational pull of the outer layers of the star. As the core shrinks, the pressure and temperature in the core increase, causing helium fusion to occur. This new fusion process generates enough energy to counteract the gravitational force, and the core stabilizes.

During this phase, the core is smaller but maintains a constant temperature. The energy generated by helium fusion balances the inward gravitational force, preventing the core from shrinking further. The outer layers of the star will continue to burn hydrogen, releasing energy and preventing the star from collapsing completely.

The star will eventually enter a new phase of evolution, depending on its mass and composition.

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NNa3 is the formula for an ionic compound that included sodium ions or nitride ions.

Depending upon if the quantity of electrons to an atom has greater or less than the amount of protons within that atom, an atom may acquire a positive or negative charge. When an atom attracts attention to another The atom because its electrons and protons are unequal, the atom is referred to as an ION.

An anode, the anode, separator, the electrolyte and two current enthusiasts one positive as well as one negative, comprise a sodium-ion battery. The sodium is stored in the anode and cathode, while the electrolyte acts in the form of circulating "blood" that retains the energy flowing.

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Explanation:

The value of equilibrium constant doesn't change when a catalyst is added.

Equilibrium constant depends on Concentration of reactants , Pressure and Temperature.

A suitable catalyst can improve the reaction rate. A catalyst is a material that increases the rate of a chemical reaction, but in the end, it remains unchanged chemically. It offers a lower energy alternative reaction path.

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Food flavorings as use of pomace has become more available through new technologies

This simply refers to a dry residue of a particular material from which a liquid is extracted. However, it is highly rich in nutrients such as:

So therefore, food flavorings as use of pomace has become more available through new technologies

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Answer:

A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years.