The #2 discovery was:
a
heliocentrism
0
E=MCP
c
heredity
general relativity
d

Answer:

230 90Th

Explanation:

A careful observation of the equation given in question shows that 234 92U is undergoing alpha decay. This means that the resulting daughter nuclei will have a decrease of 4 in the mass number and a decrease of 2 in the atomic number.

Please see attached photo for further details.

Answer:

19

Explanation:

The number below the element Fluorine is 18.99 which rounds to 19.

Answer:

The atomic mass of F is 19.

Explanation:

The mass of 4.86 × 10²⁴ Au atoms is equal to  1589.6 g.

Avogadro’s number can be used to express the number of entities such as molecules, atoms, ions, electrons, or protons in one mole of any substance.

The value of Avogadro’s constant is equal to 6.022 × 10²³ per mole.

Given, the number of atoms of the Au =  4.86 × 10²⁴

The atomic mass of the Au = 197 g/mol

So 6.022 × 10²³ atoms of Au have mass = 197 g

Then 4.86 × 10²⁴ Au atoms will have mass =  1589.6 g

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Answer:

Yes

Explanation:

Answer: both are correct

Explanation:

A Bronsted-Lowry acid is any species that may transfer a proton (H+) to another molecule. Any species that may take a proton from a different molecule is referred to as a Bronsted-Lowry base. Proton acceptors (PA) are Bronsted-Lowry bases, and proton donors (PD) are Bronsted-Lowry acids.

The connection it establishes between acids and bases is a crucial aspect of the Bronsted theory. There is a conjugate base for every Bronsted acid, and the opposite is true. A measure of an acid's strength is its Ka magnitude, while a measure of a base's strength is its conjugate base's Kb value.

The net-ionic equations of the following species which act as a Bronsted- Lowry acid are given as:

A. \(H_{3}O^{+} _{(aq)}\) ⇄ \(H^{+} _{(aq)} + H_{2} O_{(l)}\)

B. \(HCl_{(l)}\) ⇄ \(H^{+} _{(aq)} + Cl^{-} _{(aq)}\)

C. \(NH_{3(aq)}\) ⇄ \(H^{+}_{(aq)} + NH_{2} ^{-}\)

D. \(CH_{3}COOH_{(aq)}\) ⇄ \(H^{+} _{(aq)} + CH_{3}COO^{-}\)

E. \(NH_{4(aq)} ^{+}\) ⇄ \(H^{+}_{(aq)} + NH_{3} _{(aq)}\)

F. \(HSO_{4(aq)} ^{-}\) ⇄ \(H^{+} _{(aq)} + SO_{4}^{2-} _{(aq)}\)

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The mass percent of KCl in the solution is 16.67%.

The mass percent of KCl in the solution can be calculated using the formula below: Mass percent of KCl = (mass of KCl / mass of solution) × 100

To apply the formula, the masses of KCl and solution must be determined. For example, let's assume we have a solution containing 5 grams of KCl dissolved in 25 grams of water.

Therefore, the mass of the solution is:

mass of solution = mass of KCl + mass of water= 5g + 25g= 30g

Using this value in the formula gives: mass percent of KCl = (5g / 30g) × 100= 16.67%

Therefore, the mass percent of KCl in the solution is 16.67%.

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Oxygen gas is option b. element.

Pure oxygen gas is made up of molecules, but since each molecule only contains one type of element, pure oxygen gas is still regarded as an element rather than a compound.

Because the composition (or qualities) of the hydrocarbons in gasoline are consistent (the same) throughout the combination, gasoline is a homogenous mixture. This implies that it is a homogenous mixture because it is present in a single liquid phase. Numerous distinct compounds containing hydrogen and carbon make up gasoline (hydrocarbons). About 150 distinct hydrocarbons, including butane, pentane, isopentane, and the BTEX chemicals, are often included in a normal gasoline combination (benzene, ethylbenzene, toluene, and xylenes).

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The chemical reactions that result in the synthesis or assembly of large molecules are referred to as anabolic.

Anabolic reactions, also known as anabolism, involve the formation of complex molecules from simpler ones. These reactions require energy and are essential for the growth and repair of cells and tissues in living organisms.. Anabolic reactions involve the synthesis or assembly of large molecules from smaller molecules, while catabolic reactions break down large molecules into smaller ones. Glycolysis is a metabolic pathway that breaks down glucose into smaller molecules, and anaerobic reactions occur without the use of oxygen.

Thus, anabolic reactions are the chemical reactions that result in the synthesis or assembly of large molecules.

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The TRUE statement is: A basic solution has [H3O+] < [OH-].

In aqueous solutions, the concentration of hydrogen ions (H+) and hydroxide ions (OH-) determines whether the solution is acidic, neutral or basic. An acid solution has a higher concentration of H+ ions than OH- ions, while a basic solution has a higher concentration of OH- ions than H+ ions. In a neutral solution, the concentration of H+ ions and OH- ions are equal.

The pH of a solution is a measure of the concentration of H+ ions. A pH value of 7 is considered neutral, while a pH value less than 7 is considered acidic and a pH value greater than 7 is considered basic.

In a basic solution, the concentration of OH- ions is higher than the concentration of H+ ions. This means that the concentration of H3O+ ions (which are formed when water molecules combine with H+ ions) will be lower than the concentration of OH- ions. Therefore, the statement "A basic solution has [H3O+] < [OH-]" is true.

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Its average binding energy per nucleon is also higher than that of C-12.

O-16 has a higher average binding energy per nucleon.

The average binding energy per nucleon can be calculated using the formula:

average binding energy per nucleon = (total binding energy) / (total number of nucleons)

The total binding energy of a nucleus is related to its mass defect, which is the difference between its actual mass and the sum of the masses of its constituent protons and neutrons.

The mass defect is a measure of the energy that is released when the nucleus is formed from its constituent particles.

Since O-16 has a larger mass defect than C-12, it has a higher total binding energy. Therefore, its average binding energy per nucleon is also higher than that of C-12.

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Answer:

Constant

Explanation:

Here's the definition of the noun:

"A situation that does not change"

In this case the situation is the speed of the object.

If you'd like to go into further detail, let's move away from English and jump into Physics. The question asked for "object's force" - keyword: 'force'. What's the formula for force? F = m * a.

F = Force, m = mass, a = acceleration.

Okay well, the question said only the speed changes and doesn't mention the mass changing so if the mass changes the force won't be constant. However, if the mass doesn't change (constant), we can continue to acceleration.

The formula for acceleration is (I think) m/s^2, that's metres over time, squared. As we know from English class; the speed is constant and thus the square of that speed is also constant - therefore the acceleration is constant.

Now, putting them together, assuming the mass is constant, we know the acceleration is constant so the force has to be constant. Case closed.

*mic drops, this was a waste of time*

Answer:

molecules gain energ and start to move quickly

Water has highest density at 4∘C. This changes its properties from other simple fluids. When water is heated from 0∘C to 4∘C, the volume of liquid decreases. Thus for this transition, P ΔV is negative.

The density of ethylene glycol is approximately 1128 kg/m3, based on the given information about the density of the mixture and the density of water.

To find the density of ethylene glycol, we can use the given information about the density of the mixture and the density of water.

Let's denote the density of ethylene glycol as ρ_eg.

The density of the mixture can be calculated using the volume fractions of water (\(V_water\)) and ethylene glycol (\(V_eg\)) in the mixture:

Density of the mixture = (\(V_water\) * density of water) + (\(V_eg\) * density of ethylene glycol)

Given that the mixture is 50% water and 50% ethylene glycol, the volume fractions can be expressed as:

\(V_water\) = 0.50

\(V_eg\) = 0.50

Substituting the values into the equation:

1064 kg/m³ = (0.50 * 1000 kg/m³) + (0.50 * ρ_eg)

Simplifying the equation:

1064 kg/m³ = 500 kg/m³ + 0.50 * ρ_eg

Subtracting 500 kg/m³ from both sides:

564 kg/m³ = 0.50 * \(\rho_\text{eg}\)

Dividing both sides by 0.50:

\(\rho_\text{eg} = 564 \frac{\text{kg}}{\text{m}^3} \div 0.50\)

\(\rho_\text{eg}\) ≈ 1128 kg/m³

Therefore, the density of ethylene glycol is approximately 1128 kg/m³.

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Ionic compounds are composed of an ion pair of opposite charge. Usually, the positive ion is a metal cation while the negative ion is a non metal anion. The two ions are held together by strong electrostatic interaction.

The charge of the element will be -2. The subscript of Li is the charge of X and that of X be the charge of Li, that is +1.

Lithium is 3rd element in periodic table. It is the first element in the first group called the alkali metals having one valence electron and thus forms the oxidation state of +1.

Lithium shows both covalent and ionic character. But preferably it forms ionic compounds. Li donates its one valance electron to the bonding non-metal and the non metal gains a negative charge.

Here, two lithium atoms are needed to bond with the element x, thus x needs two electrons to attain octet. Therefore the charge of the element x will be -2, and that of each lithium is +1. The charge of the anionic part is written as subscript for cationic part and vice versa.

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Answer:

The integrated rate laws for zero-, first-, and second-order reaction may be arranged such that they resemble the equation for a straight line, y = mx + b. Part A The reactant concentration in a zero-order reaction was 0.100 M after 100 s and 1.50x10-2 M after 360 s. What is the rate constant for this reaction? Order 0 1 | 2 Integrated Rate Law Graph [A] =- kt +[A]o [A] vs. t In[A] = -kt + In[A]o In[A] vs. t = kt + Á A vs. t Slope -k -k k Express your answer with the appropriate units. Indicate the multiplication of units, as necessary, explicitly either with a multiplication dot or a dash. ► View Available Hint(s) koth = 3.27x10-4 M S Submi Previous Answers Correct Important: If you use this answer in later parts, use the full unrounded value in your calculations.

Explanation:

Answer:

\(\boxed {\boxed {\sf 19 \ M}}\)

Explanation:

Molarity is a measure of concentration in moles per liter, so the formula is:

\(molarity= \frac{moles \ of \ solute}{liters \ of \ solution}}\)

This solution has 9.0 moles of solute and 462 milliliters of solution. We must convert milliliters to liters. Remember that 1 liter contains 1000 milliliters.

Create a ratio.

Multiply by the value we are converting: 462 milliliters

\(0.462 \ L\)

Now we know both values and we can solve for the molarity.

\(molarity= \frac{9.0 \ mol}{ 0.462 \ L}\)

Divide.

\(molarity= 19.4805195 \ mol/L\)

The original measurements of moles and milliliters have 2 and 3 significant figures respectively. We have to round our answer to the least number of sig figs, which is 2 in this case.

For the number we found, that is the ones place. The 4 in the tenths place (19.4805195) tells us to leave the 9 in the ones place.

\(molarity= 19 \ mol/L\)

1 mole per liter is equal to 1 molar or M, so our answer is equal to 19 M.

\(molarity \approx 19 \ M\)

The molarity of the solution is approximately 19 M.

Answer:

26.6

Explanation:

You are referring to a process known as diffusion.

The movement of molecules from a region with a greater concentration to one with a lower concentration is known as diffusion. The random mobility of molecules in a liquid, like water, causes this movement to take place.

. In this process, molecules move down their concentration gradient, which means they move from regions where they are more concentrated to regions where they are less concentrated.

Diffusion is a passive process that does not require any additional energy input. It plays a crucial role in various biological processes, such as the exchange of gases in the lungs, the absorption of nutrients in the digestive system, and the release of waste products by cells.

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Answer:

less metallic

Explanation:

Answer:

D; Decrease in atomic mass.

Explanation:

I looked at the periodic table.

Answer:

25.9 g

Explanation:

Given that,

No of moles of calcium phosphate, \(n=9.3\times 10^{-2}\)

We need to find how many grams of calcium phosphate has this much of no of moles.

Mass divided by molar mass is equal to the no of moles on a molecule.

The molar mass of calcium phosphate is 310.18 g/mol

Using the concept of no of moles as follows :

\(n=\dfrac{m}{M}\\\\m=n\times M\\\\m=9.3\times 10^{-2}\times 310.18\\\\m=28.84\ g\)

Out of given options, option (a) i.e. 25.9 g is the correct answer.

Answer:

City Hall - directs necessary activities throughout the city

Explanation:

Answer:

Town Hall,

Explanation:

Answer:

B. Adsorption

Explanation:

The process is called adsorption

Answer:

protons

Explanation:

The number of protons in the nucleus determines which element an atom is, while the number of electrons surrounding the nucleus determines which kind of reactions the atom will undergo.

A solid precipitate containing phosphorus develops when sodium phosphate and magnesium chloride are combined as aqueous solutions. Aqueous sodium phosphate is combined with aqueous MgCl.

Phosphorus is a relatively extensively distributed element, ranking 12th in terms of abundance in the crust of the Earth, where it contributes roughly 0.10 weight percent. One of its atoms exists for every normal silicon atom in the cosmos. Due to its great chemical reactivity, it cannot exist in a free state (except in a few meteorites). The phosphate ion is the only way that phosphorus may exist. The phosphate salts are the primary combination forms in nature. Apatites, which have the chemical formula [Ca10(PO4)6(F, Cl, or OH)2], are the main source of phosphorus among the about 550 distinct minerals that have been found to contain the element. Apatites include calcium ions, phosphate ions, and varying amounts of fluoride, chloride, or hydroxide ions.

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The complete question is:

When aqueous solutions of sodium phosphate and magnesium chloride are mixed together, a solid precipitate forms that contains phosphorus.

Generally, Equilibrium is defined as a state in which opposing forces or actions are balanced so that one is not stronger or greater than the other.

Concentration of CH₄ = 1.39

So X here is = -1.39 + 4 = 2.61

So concentration of,

H₂S = 8 - 2 × (2.61) = - 2. 78 M

Cs₂ = 4 - 2.61 = 1.39 M

H₂ = 8 - 4 (2.61) = -2.44 M

Concentration is defined as the amount of a substance, such as a salt, that is in a certain amount of tissue or liquid, such as blood. When less water is present in a substance it usually becomes more concentrated.

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Answer:

18.375 gm left

Explanation:

1/2 ^4 = 1/16th will be left     (see the '4' representing 4 half lives?)

294 * 1/16 = 18.375 gm

Answer:

Solution given:

22.4 liter of O2=1 mole of O2

694litre of O2=\( \frac{1}{22.4} \times 694\)

=30.98or 31 mole of O2

Answer: The circulatory system.

Explanation: The circulatory system, which is part of the "cardiovascular" system, is one of the eleven organ systems of the human body. Its main function is to transport nutrients to cells and wastes from cells (Figure 3.4. 1). This system consists of the heart, blood, and blood vessels.

The blood cells carry nutrients from food to the rest of the cells in the body.

The human circulatory system moves important nutrients and minerals throughout the body and metabolic waste products out from the body. The human circulatory system contains blood, blood vessels, heart, and lymph.

The human circulatory system provides essential nutrients, minerals, oxygen, and hormones to different parts of the body and is responsible for collecting toxins from the cells and tissues to be purified or eliminated from the body.

The human circulatory system contains a wide network of blood vessels. These constitute arteries, veins, and capillaries. The primary function of blood vessels is to transport nutrients and oxygenated blood to all parts of the body.

The Circulatory system helps in sustaining all the organ systems and transports blood, nutrients, oxygen, and hormones throughout the body. It secures cells from pathogens and acts as an interface for cell to cell interaction.

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Answer:

The number of protons

Explanation:

Answer:

number of negative electric charger

explanation

(the electrons ) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral .