Fill in the blank.the amount which an object accelerates depends on the mass of the object on the size of the ____ acting upon it
I need help I’m struggling

Answer:

The change from a liquid phase to a gaseous phase.

so the answer would be it changed to a gaseous phase

---------------

This is what occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

Answer:

\(75\ \text{g}\)

Explanation:

t = Time = 180 years

\(t_{1/2}\) = Half-life of titanium = 60 years

\(N_0\) = Initial amount of titanium = 600 g

We have the relation

\(N=N_0e^{-\lambda t}\\\Rightarrow N=N_0e^{-\dfrac{\ln 2}{t_{1/2}}t}\\\Rightarrow N=600e^{-\dfrac{\ln 2}{60}\times 180}\\\Rightarrow N=75\ \text{g}\)

The mass that is left after 180 years is \(75\ \text{g}\).

Answer:

The correct option is;

C. I only

Explanation:

Given that in a chemical reaction, the number of valence electrons in the outermost shell of an atom determines the ratio in which the atom combines with other atoms to have the stable 8 (octet) valence electrons in their outermost shell, we have that atoms in a group combines with atoms in other groups, where possible, in the same ratio.

Therefore, sodium, which is in the first column (group I) combines with atoms of elements in other groups, in the same ratio as atoms of the other elements of the column 1

Since hydrogen combines with chlorine in the same ratio as sodium which is from the first column, hydrogen is also an element from the first column.

A balloon contains 0.128 mol of gas and has a volume of 2.76 l. if an additional 0.073 mol of gas is added to the balloon, the final volume of the balloon is 4.35 liters.

An ideal gas is a theoretical model used in physics and chemistry to describe the behavior of gases under certain conditions. The concept of an ideal gas assumes a set of simplified assumptions that make calculations and understanding gas behavior more manageable.

To solve this problem, 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 gas constant, and T is the temperature.

Since the temperature is constant in this problem, we can use the simplified equation:

PV = n constant

We can use this equation to find the initial volume of the balloon:

V1 = n1 constant / P

V1 = 0.128 mol constant / P

We don't know the pressure, but we don't need it to find the final volume. Instead, we can use the fact that the final number of moles is the sum of the initial number and the amount added:

n2 = n1 + 0.073 mol

So the final volume can be found by rearranging the equation and solving for V2:

V2 = n2 constant / P

V2 = (n1 + 0.073 mol) constant / P

Substituting the values we know:

V1 = 0.128 mol constant / P = 0.128 * constant / P

V2 = (0.128 + 0.073) mol constant / P = 0.201 * constant / P

Setting V1 equal to V2:

0.128 * constant / P = 0.201 * constant / P

Simplifying:

0.128 / P = 0.201 / P

Multiplying both sides by P:

0.128 = 0.201

This is not a valid solution, which means we made an error in our calculation. Checking our work, we can see that we forgot to include the initial volume of the balloon. The correct equation for the initial volume is:

V1 = n1 constant / P1

We still don't know the pressure, but we can use the fact that the pressure is constant in this problem, so we can use the ratio of volumes to find the pressure:

V1 / V2 = P1 / P2

Substituting the values we know:

V1 = 0.128 mol constant / P1 = 0.128 * constant / P1

V2 = (0.128 + 0.073) mol constant / P2 = 0.201 * constant / P2

V1 / V2 = P1 / P2

0.128 * constant / (2.76 l) / 0.201 * constant / V2 = P1 / P2

Simplifying:

V2 / 2.76 l = P2 / P1

Substituting the values we know:

V2 / 2.76 l = P2 / P1

V2 / 2.76 l = P2 / constant / n constant / T

Simplifying:

V2 = 2.76 l * P2 * n constant / constant / T

We still don't know the pressure, but we can use the fact that the pressure is proportional to the number of moles at constant volume and temperature:

P1 / n1 = P2 / (n1 + 0.073 mol)

Substituting the values we know:

P1 / 0.128 mol = P2 / 0.201 mol

Solving for P2:

P2 = P1 * (0.201 mol / 0.128 mol)

Substituting into the equation for V2:

V2 = 2.76 l * P2 * n constant / constant / T

V2 = 2.76 l * P1 * (0.201 mol / 0.128 mol) * n constant / constant / T

Simplifying:

V2 = 4.35 l

Therefore, the final volume of the balloon is 4.35 liters.

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According to World Population Review 2022 the safest country to live are as follows.

These countries are listed safe by calculating global peace index.

This index measures the nation's and regions peacefulness and is finally reviewed by Institute of Economic and Peace (IEP).

The role of IEP is to measure peace at the worldwide and country level degree and lets us to evaluate the social, political and financial elements that create peace. Each year the Institute for Economics and Peace produces the Global Peace Index, the world’s main degree of countrywide peacefulness, rating 163 nations in line with their ranges of peace.

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Answer:

Newton's 2nd Law

Explanation:

Newton's Second Law of Motion is concerned with the effect that unbalanced forces have on motion.

Law of unbalanced forces is also know as Newton's 2nd Law

Answer:

A) 12 mol H2O.

Explanation:

Hello,

In this case, for the given reaction:

\(2C_2H_6+7O_2\rightarrow 4CO_2 + 6 H_2O\)

We notice that oxygen is in a 7:6 molar relationship with water, for that reason, the resulting moles of water turn out:

\(n_{H_2O}=14molO_2*\frac{6molH_2O}{7molO_2} \\\\n_{H_2O}=12molH_2O\)

Thus, the answer is A) 12 mol H2O.

Best regards.

The mole fraction of NH3 in the solution prepared by dissolving 15.0 g of nh3 in 250.0 g of water is 0.0597.

To find the mole fraction of NH3 in the solution, we need to first calculate the moles of NH3 and water in the solution.

The moles of NH3 can be found by dividing the mass of NH3 by its molar mass:
moles of NH3 = 15.0 g / 17.03 g/mol = 0.881 mol

The moles of water can be found by dividing the mass of water by its molar mass:
moles of water = 250.0 g / 18.02 g/mol = 13.874 mol

The total moles of solute and solvent in the solution are:
total moles = moles of NH3 + moles of water = 0.881 mol + 13.874 mol = 14.755 mol

The mole fraction of NH3 can now be calculated as the ratio of moles of NH3 to total moles:
mole fraction of NH3 = moles of NH3 / total moles = 0.881 mol / 14.755 mol = 0.0597

Therefore, the mole fraction of NH3 in the solution is 0.0597.

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The coordination number of the metal atom in the [CO(CN)(NH3)(en)2]³+ complex is 6

The coordination number of a metal atom refers to the number of ligands directly bonded to the metal in a complex. In the given complex [CO(CN)(NH3)(en)2]³+, the coordination number can be determined by counting the number of ligands attached to the central metal atom.

In the complex, we have several ligands: CO, CN, NH3, and two en (ethylenediamine) ligands. Each ligand contributes one bond to the metal atom. Therefore, the coordination number is the total number of ligands attached to the metal atom.

Counting the ligands in the complex, we find that there are a total of six ligands bonded to the metal atom: CO, CN, NH3, en, en. Hence, the coordination number of the metal atom in [CO(CN)(NH3)(en)2]³+ is 6.

Therefore, the coordination number of the metal atom in the [CO(CN)(NH3)(en)2]³+ complex is 6, indicating that the metal atom is surrounded by six ligands.

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In order to write balanced half-reactions for the oxidation and reduction that occur in a chemical reaction, we first need to identify the species being oxidized and reduced. The (aq) and (s) labels indicate the states of the reactants and products.

Let's assume the reactants are A(aq) and B(s), and the products are C(aq) and D(s).

The oxidation half-reaction involves the species being oxidized, which loses electrons. The reduction half-reaction involves the species being reduced, which gains electrons.

To balance the half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced.

For example, if A is being oxidized and B is being reduced, the balanced half-reactions could be:

Oxidation half-reaction:
A(aq) → C(aq) + e-

Reduction half-reaction:
B(s) + e- → D(s)

So, the oxidation half-reaction is A(aq) → C(aq) + e- and the reduction half-reaction is B(s) + e- → D(s). To write the balanced half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced. In the oxidation half-reaction, A(aq) is being oxidized and loses an electron (e-). The resulting product is C(aq). On the other hand, in the reduction half-reaction, B(s) is being reduced and gains an electron (e-). The resulting product is D(s). By balancing the atoms and charges, we can write the balanced half-reactions as follows:
Oxidation half-reaction: A(aq) → C(aq) + e-
Reduction half-reaction: B(s) + e- → D(s)

The balanced half-reactions for the oxidation and reduction in the chemical reaction are A(aq) → C(aq) + e- and B(s) + e- → D(s), respectively.

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The solubility of BaF₂ will be significantly affected by a change in pH. Option A is correct.

BaF₂ is an ionic compound that is sparingly soluble in water. When it dissolves in water, it undergoes hydrolysis to form hydrofluoric acid (HF) and a basic salt (Ba(OH)₂). The pH of the solution will therefore be determined by the relative concentrations of HF and Ba(OH)₂. As the pH of the solution changes, the equilibrium between BaF₂, HF, and Ba(OH)₂ will shift, leading to a change in the solubility of BaF₂.

In contrast, BaCl₂, BaBr₂, and BaI₂ are also ionic compounds that are soluble in water but do not undergo hydrolysis to any significant extent. Therefore, their solubilities are not significantly affected by changes in pH.

Hence, A. BaF₂ is the correct option.

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Answer:

c chart c

Explanation:

saturated solution: A solution with solute that dissolves until it is unable to dissolve anymore, leaving the undissolved substances at the bottom.

The chart which represents the graph for the saturated solution is chart C, because in that graph extra solutes are present at the bottom.

Saturated solutions are those solutions in which all solutes will dissolve in the solvent and addition of extra solute will not dissolve in the solution, but gets settle down at the bottom of the solution.

Hence chart C shows the saturated solution.

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Answer:

feauurrjfjf iiii ammm soo confused

Explanation:

Lead has 82 protons and 82 electrons.

Lead, with an atomic number of 82, indicates the number of protons in its nucleus. Therefore, lead has 82 protons. Since atoms are electrically neutral, the number of electrons in an atom is equal to the number of protons. Consequently, lead also has 82 electrons.

The protons, located in the nucleus, carry a positive charge, while the electrons, which orbit around the nucleus, carry a negative charge. The equal number of protons and electrons ensures that the overall charge of a lead atom is neutral.

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Answer:

A chemical bond formed when two atoms share two pairs of electrons is a double bond; it is best described as a covalent bond.

Explanation:

A chemical bond in which two pairs of electrons are shared has to be defined as covalent since ionic bonds don't involve electron sharing. They consist only of electrostatic attraction between ions.

Answer:

Cellular respiration can be defined as the process in which cells convert sugar into energy

C₆H₁₂O₆ + 6O₂ -------------------> 6CO₂ + 6H₂O + ~38 ATP

Glucose + Oxygen → Carbon Dioxide + Water + Energy Sunlight Sugar Oxygen Carbon

Answer:

CO is a chemical formula that contains one carbon atom (C) and one atom of oxygen (O). Altogether, CO translates to "carbon monoxide."

Explanation: Why monoxide and not dioxide? Well, the prefix mono means "one," and di means "two." Since there is only one oxygen atom (-oxide), then it must be monoxide! Voila!!

The change in entropy when 1g of water freezes is 1.22 J/K .The heat of fusion of water = 334 J/g, The temperature at which water freezes = 0°CChange in entropy when 1g of water freezes is to be calculated

As we know that the heat of fusion of water is the amount of heat required to convert one gram of ice at its melting point to water at the same temperature.The heat of fusion of water is 334 J/g.Therefore, the amount of heat required to freeze 1g of water at 0°C is given as;Heat required to freeze 1g of water = (1g) (334 J/g) = 334 J0

The entropy change is given by the formulaΔS = q/T where ΔS is the change in entropy, q is the heat supplied and T is the temperature in Kelvin.The temperature at which water freezes is 0°C = 273.15KTherefore, the change in entropy when 1g of water freezes isΔS = 334 J/273.15K = 1.22 J/K

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Answer:

The first one

When two aqueous solutions react, they sometimes form solids in the solution. The solid is called a precipitate.

Answer:

Moving water and blowing winds are major factors that impact the appearance of our planet by causing weathering and erosion.

Explanation:

Waves and winds pounding against rock and sand break down the materials in a process called weathering and move them away in a process called erosion, resulting in a changing landscape.

Answer:

Mainly water and salt. That can be ocean water blowing or road salt.

Following is the list of primary secondary and tertiary alcohols.

Alcohols are chemical compounds made composed of an alkyl or aryl group and a hydroxyl group (ROH). A fundamental alcohol is a hydroxyl carbon with just one R group. If it contains two R groups, it is a secondary alcohol, and if it has three R groups, it is a tertiary alcohol.

Look at the carbon bonded to OH to identify whether an alcohol is primary, secondary, or tertiary. The alcohol is primary, secondary, or tertiary depending on how many other carbons are connected to that carbon. It is methanol if there are three hydrogens and no carbons, which is a rare combination.

For the given formulas, following are different types of alcohols -

a) Primary Alcohols

b) Tertiary Alcohol

c) Secondary Alcohol

d) Primary Alcohol

e) Primary Alcohol

f) secondary Alcohol

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Answer:

work is something u are working hard to get money or you are dedicated to it to have a daily wage

True. Chlorine compounds are effective disinfectants and can remain stable even in the presence of excess organic matter. However, it is important to note that the effectiveness may be reduced over time as the content of loaded matter increases.

Chlorine compounds, specifically content loaded chlorine compounds, can remain stable and effective in the presence of excess organic matter. These compounds maintain their disinfecting and sanitizing properties even when exposed to large amounts of organic matter.When present with organic materials, chlorine compounds may react and lose their effectiveness. As a result, the ability to disinfect may be diminished, which could lead to the persistence of dangerous diseases. Water treatment facilities frequently use pre-treatment procedures or alternate disinfection techniques that are less prone to interference from organic matter to address this issue.

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As the Earth gets warmer, deserts are expected to increase in size.

As the Earth warms, it is projected that deserts will expand. This is due to the possibility that increased temperatures may lead to greater soil and plant moisture evaporation which could lead to drier conditions and slower plant growth.

Further limiting the amount of water accessible in arid regions is the fact that hotter weather can hasten the evaporation of water from lakes and other sources of surface water.

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Answer:

2

Explanation:

Pb(NO3)2 + 2NaI 2NaNO3 + PbI2

To see the coefficients of NaI in the given reaction we need to balance the reaction first. The coefficient for Nal once the equation is balanced is 2. the correct option is option B.

Balanced equation is the one where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be created nor be destroyed.

The unbalanced equation is

\(\rm Pb(NO_{3})_{2}+ Nal\rightarrow NaNO_{3} + PbI_{2}\)

The atoms of Pb on reactant and product side is 1 so Pb is balanced.

The atoms of N is 2 on reactant and 1 on product side so balance it as

\(\rm Pb(NO_{3})_{2}+ Nal\rightarrow 2 NaNO_{3} + PbI_{2}\)

The atoms of O is 6 on reactant and 6 on product side so it is balanced

The atoms of I is 1 on reactant and 2 on product side so balance it as

\(\rm Pb(NO_{3})_{2}+2 Nal\rightarrow 2NaNO_{3} + PbI_{2}\)

The atoms of Na on reactant and product side is 2 so Na is balanced.

Now all the elements are balanced

Therefore, the coefficient for Nal once the equation is balanced is 2. the correct option is option B.

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Answer:

light

Explanation:

I'm not sure to my answer but hope it helps if it is correct:)

Answer:

A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . ... The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.

Answer:

A solution is a homogeneous mixture consisting of a solute dissolved into a solvent .

Explanation:

We can change a molecule into a series of one or more elements by breaking down the chemical bonds that connect atoms in the molecule.

The chemical bonds of a molecule can be defined as the different types of attractive forces that link atoms in a molecule, which include, for example, covalent bonds, ionic bonds, hydrogen bonding, metallic bonding, etc.

Therefore, with this data, we can see that we have to break the chemical bonds of a molecule in order to separate molecules into their simplest constituents, i.e., atoms.

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Answer:

heat up i think

Explanation: