a 11.9 g sample of caso4 is found to contain 3.50 g of ca and 5.59 g of o. find the mass of sulfur in a sample of caso4 with a mass of 43.0 g.

Answer:

Team 2

Explanation:

Team 1 pulls with a frce of 150N

Team 2 pulls with a force of 200N

In a tug-of-war, the goal is to pull the other team over a certain distance and this is determined by the force applied.

If the two team pulls with equal force, there wold be no net force and the teams stays in the same position.

In this case however, team 2 pulls with a force greater than team 1. There is a net force of 50N in favor of Team 2. This means team 2's force would neutralize that of team 1 and the excess force would be use in pulling Team 1

At present, the greenhouse effect of carbon dioxide is not greater than that of water vapor. Thus, the given statement is false.

The amount of effect that water vapor has on the greenhouse effect is about 40-50 percent while with carbon dioxide, it accounts to 25 percent. The significant difference between them shows the different impacts on the greenhouse effect.

Both of them cause the same effects of heat, however, water vapor being a greenhouse gas is inevitable and natural.  It is much needed for life to sustain on earth, however, the numbers have increased causing an alarming rate of change that may not be good.

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Answer:

To protect people and the environment.

Explanation:

In an ecosystem, the  goal of all environmental regulations is to protect people and the environment.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:8

842.46 or to the next whole number

Explanation:

just multiply the mass of iron with the volume mL you have.

The mass of the iron whose volume and density are 111 ml and 7.847 g/cm³ respectively is 871.01 grams.

The product of density and volume of a substance represents its mass. Mathematically -

M = V x ρ

where -

ρ - density

M - mass

V - volume

Given is iron in liquid form. It occupies a total volume of 111 ml.

The mass of liquid iron can be calculated using -

M = V x ρ

Volume of iron [V] = 111 ml = 111 cm³.

Density of iron [ρ] = 7.847 g/cm³

Therefore, we can write -

M = 7.847 x 111

M = 871.01 grams

Therefore, the mass of the iron whose volume and density are 111 ml and 7.847 g/cm³ respectively is 871.01 grams.

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Answer:

I`m pretty sure it`s electrical tape.

Explanation:

The objects which does not conduct electricity are called insulators which are not needed to test electrical conductivity. Hence, insulated wire is the correct option.

Conductivity of a substance is the ability to conduct electrically or thermally through the substance. Based on their conductivity, there are three classes of materials conductors, semiconductors and insulators.

Conductors are materials conducting heat and electricity at all temperatures. Semiconductors conduct only at higher temperature or on doping. Insulators are material does not conduct at any condition.

Metals are good conductors. Silicon , germanium etc. are semiconductors. Whereas, wood, plastic etc. are insulators they does not allow flow of electrons through it. Therefore, an insulated wire is not needed to test conductivity.

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Answer:

C.) 2-butyne

Explanation:

Since the molecule has 4 central carbons, it has the prefix but-.

Since the molecule has a triple bond between central carbons, it has an ending of -yne.

Since the triple bond starts on the second carbon, it has a 2 - prefix.

The balanced equation for the half-reaction that takes place at the cathode is: N2H4(aq) + 4OH^-(aq) + 4e^- → N2(g) + 4H2O(l)

The balanced equation for the half-reaction that takes place at the anode is: 2Br2(l) → 4Br^-(aq) + 4e^-

The cell voltage under standard conditions is -1.91 V.

The balanced equation for the half-reaction that takes place at the cathode is:

N2H4(aq) + 4OH^-(aq) + 4e^- → N2(g) + 4H2O(l)

The balanced equation for the half-reaction that takes place at the anode is:

2Br2(l) → 4Br^-(aq) + 4e^

To calculate the cell voltage under standard conditions, we need to find the reduction potentials (E°) for the half-reactions involved. The reduction potential for the cathode half-reaction is -0.84 V, and for the anode half-reaction, it is +1.07 V.

The cell voltage (E°cell) is calculated by subtracting the reduction potential of the anode half-reaction from the reduction potential of the cathode half-reaction:

E°cell = E°cathode - E°anode = -0.84 V - (+1.07 V) = -1.91 V

Therefore, the cell voltage under standard conditions is -1.91 V.

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Answer:

c. Chemical bonds are broken, and new ones are formed.

Explanation:

Hope this helps. :)

In a chemical reaction, chemical  bonds are broken, and new ones are formed.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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silver density is 10.5 gm/cm3

Answer:

C) 219 cm^3

Explanation:

What volume of silver metal

will weigh exactly 2,300.0 g

if the density of silver is

10.5 g/cm3?

A) 2.42x10^4 cm^3

B)4.47x10^-3 cm^3

C) 219 cm^3

density D = M/V

so D X V=M

so V=M/D

mass is 2,300.0 gm

density is 10.5 gm/cm3

so V=2,300.0/10.5 =219cm3

so the answer is c

C) 219 cm^3

will weigh exactly 2,300.0 g

if the density of silver is

10.5 g/cm3?

A) 2.42x10^4 cm^3

B)4.47x10^-3 cm^3

C) 219 cm^3

density D=M/V

so M= DXV

so 2.3

Answer:

Explanation:

Decreasing the volume of a contained gas will increase its pressure, and increasing its volume will decrease its pressure. In fact, if the volume increases by a certain factor, the pressure decreases by the same factor, and vice versa. Volume-pressure data for an air sample at room temperature are graphed in Figure 5.

Because the volume has decreased, the particles will collide more frequently with the walls of the container. ... When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. This is shown by the following equation - which is often called Boyle's law.

The kinetic energy of the gas molecules increases, so collisions with the walls of the container are now more forceful than they were before. As a result, the pressure of the gas doubles. Decreasing the temperature would have the opposite effect, and the pressure of an enclosed gas would decrease.

For a fixed mass of gas at constant temperature, the volume is inversely proportional to the pressure. That means that, for example, if you double the pressure, you will halve the volume. If you increase the pressure 10 times, the volume will decrease 10 times.

Temperature, pressure, volume and the amount of a gas influence its pressure.

Gay Lussac's Law - states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature. If you heat a gas you give the molecules more energy so they move faster. This means more impacts on the walls of the container and an increase in the pressure.

i really hope some of this helped i would put more but its a lot too type

Answer:

I think it’s 7.0 moles of water.

Explanation:

gj

The mass of iron (III) oxide that will be produced would be 22.1 grams

From the equation of the reaction:

\(3KOH + Fe(NO_3)_3 --- > 3KNO_3 + Fe(OH)_3\)

The mole ratio of iron (III) nitrate to iron (III) hydroxide is 1:1.

Mole of 50 g iron (III) nitrate = 50/241.86 = 0.207 moles

Equivalent mole of iron (III) hydroxide = 0.207 moles

Mass of 0.207 moles iron (III) hydroxide = 0.207 x 106.87 = 22.1 grams

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In a typical amino acid zwitterion, the carboxylate end is negatively charged.

Zwitterion:

In a typical amino acid zwitterion, the carboxylate end is negatively charged while the amino end is positively charged.

This occurs because the carboxyl group (COOH) loses a proton (H⁺), forming a carboxylate ion (COO⁻). The amino end (NH₂) gains a proton (H⁺), becoming positively charged (NH₃⁺).

This creates a zwitterion, which is a molecule with both positive and negative charges but is overall electrically neutral. This zwitterion form makes the amino acid soluble in water as it can form hydrogen bonds with the surrounding water molecules.

However, the carboxylate end can also participate in ionic interactions with other charged molecules in the environment.

The carboxylate end is not neutral and is not soluble in a nonpolar solvent, as nonpolar solvents cannot interact with the charged end of the molecule. The carboxylate end is attached to the carbon atom of the amino acid, while the amino end is attached to the nitrogen atom.

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Answer:

True

Explanation:

The circumstance that needs to occur in order for elements to form a compound is known as a chemical reaction. Thus, the correct option for this question is D.

A chemical reaction may be defined as a methodology through which one or more substances known as the reactants are significantly transformed into one or more different substances that are known as the products in the presence of enzymes or energy.

A series of elements undergo chemical reactions spontaneously in order to transform themselves into chemical compounds. The properties of each element prior to the reaction are unique but after the reaction, the properties of all the elements are now present in the single compound.

Therefore, the circumstance that needs to occur in order for elements to form a compound is known as a chemical reaction. Thus, the correct option for this question is D.

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Answer:

500

Explanation:

from the average and if yoy multiple and then add your % and x you would get 500 to 600

Answer:

True

Explanation:

Answer:

9.370 x 10 to the 23 molecules

Explanation:

91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co

Answer:

Explanation:

Mass 1 mole of CO

C = 12

O = 16

m = 28

Mols of 91.72 grams

m = given Mass / Molar Mass

m = 91.72 / 28

m = 3.28 mols

Molecules

1 mol of anything is 6.02 * 10^23 molecules (in this case)

3.28 mol of CO = x

1/3.28 = 6.02*10^23/x      Cross multiply

x = 3.28 * 6.02 * 10^23

x = 1.97 * 10^24

Answer:

applied force .....I'm pretty sure

Answer:

A. Applied forces aka Contact forces

Explanation:

Thos force is created when you apply forces to an object as in a push/pull or other physical ways.

I hope it helps! Have a great day!

Anygays-

Answer:

Option (d) is the correct answer.

Explanation:

Radiation is defined as electromagnetic energy that travels in space in the form of waves or particles.  This means that heat energy will always travel from a warmer object to a colder object.  For example, radiations coming from the Sun are able to transfer heat energy to the substance on which they fall.  Thus, we can conclude that radiation is the method of heat transfer used by the Sun.

We use models to represent molecules and compounds because they are to small to see with our eyes so we need a visual representation. Thus option A is correct.

Compounds are defined as a substance made up of two or more different elements that are combined in a fixed ratio.

Molecules are defined as a smallest particle of a substance that has their own physical and chemical properties.

Models can be defined as an informative representation of an objects, person or system.

We use models in chemistry because it help us to visualize or picture in your mind something which is difficult to see and understand.

Thus, we use models to represent molecules and compounds because they are to small to see with our eyes so we need a visual representation. Thus option A is correct.

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A voltaic cell is an electrochemical cell that uses spontaneous redox reactions to generate electrical energy. A Cu/Cu2+ half-cell and an Hg/Hg2+ half-cell are included in the voltaic cell. The Cu2+ + 2 e− → Cu reaction has a standard potential of +0.34 V, whereas the Hg2+ + 2 e− → 2 Hg reaction has a standard potential of +0.79 V.

A voltaic cell is an electrochemical cell that uses spontaneous redox reactions to generate electrical energy. A Cu/Cu2+ half-cell and an Hg/Hg2+ half-cell are included in the voltaic cell. The Cu2+ + 2 e− → Cu reaction has a standard potential of +0.34 V, whereas the Hg2+ + 2 e− → 2 Hg reaction has a standard potential of +0.79 V.

Net reaction of voltaic cell: Hg2+ + Cu → Hg + Cu2+

The spontaneous reaction for this voltaic cell can be written as follows: Hg2+ + Cu → Hg + Cu2+

We'll utilize the Nernst equation to calculate the cell potential since the standard reduction potentials for both half-cells are supplied. The equation for the Nernst equation is as follows: E = E° − (RT/nF) * ln(Q)

We'll utilize the following values to calculate the potential of the cell: E°cell = E°reduction (reduction half) - E°reduction (oxidation half)

E°cell = E°reduction (cathode) - E°reduction (anode)

E°cell = 0.79 - 0.34

E°cell = 0.45 Volts

Ecell = E°cell - (0.0592/n) * log(Q)

Ecell = 0.45 - (0.0592/2) * log (1/[Cu2+])

The given half-cell reactions indicate that there is 1 mol of Cu2+ for every 1 mol of Hg2+ reacting. As a result, Q = [Cu2+].

Ecell = 0.45 - (0.0592/2) * log (1/[Cu2+])

Ecell = 0.45 - (0.0296) * log (1/[Cu2+])

Ecell = 0.45 - (0.0296) * log (1/1)

Ecell = 0.45 V (rounded to 2 decimal places).

Hence, the answer is 0.45 V.

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Answer: HOCl is considered the primary product when chlorine is added to water.

When chlorine is added to water, it reacts with water to form a mixture of hypochlorous acid (HOCl) and hydrochloric acid (HCl) as the primary products. The exact ratio of these products depends on the pH of the water. In acidic solutions, more HCl is formed, while in basic solutions, more HOCl is formed. HOCl is a powerful disinfectant and is commonly used in water treatment to kill bacteria, viruses, and other harmful microorganisms. It works by disrupting the cell membranes of these microorganisms, which causes them to die. However, HOCl can also react with organic compounds in the water to form harmful byproducts, such as trihalomethanes, which can pose a health risk. To minimize the formation of harmful byproducts, water treatment plants carefully control the amount of chlorine added to the water and adjust the pH of the water to optimize the formation of HOCl. Overall, the addition of chlorine to water is an important step in ensuring safe and clean drinking water for the public.

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A cell containing 97% h₂o is placed into a 90% h₂o  solution. the solution is to the cell and there the size of the cell will shrink .

             Solute + Solvent = Solution

The cell will cremate because the water in the solution will gets released and there the state of equilibrium exists and that can be determined as Hypertonic solution.

A liquid that has a higher concentration of dissolved particles than regular cells and blood do, like salt and other electrolytes. For instance, wounds are soaked in hypertonic liquids.

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Answer:

Sulfur hexafluoride

Explanation:

It is heavier than air that we breathe so it has an opposite effect.

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Answer:

Sediment moves from one place to another through the process of erosion. Erosion is the removal and transportation of rock or soil. Erosion can move sediment through water, ice, or wind. Water can wash sediment, such as gravel or pebbles, down from a creek, into a river, and eventually to that river's delta.

Explanation:

Erosion refers to the washing away or the removal of top soils/rocks by agents such as water, wind, etc.

Erosion is the removal of topsoils or rocks by agents of erosions. These agents include water, wind, waves, and ice.

In water/ice erosion, topmost soils or rocks are washed away and deposited somewhere else, usually in or at the mouth of nearby water bodies.

Wind erosion carries soils/rocks and deposits them somewhere else. The deposition accumulates over a period of time to form different landforms.

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The hot pack has a 0.868 J/g°C heat capacity.

To solve this problem, we can use the formula:
q = mcΔT

where q is the heat transferred, m is the mass of the object, c is the specific heat capacity, and ΔT is the change in temperature.

First, let's find the heat transferred by the hot pack to warm up the water:
q = mcΔT
q = (30.0 g)(c)(85°C - 25°C)
q = 20400c J

Next, let's find the heat transferred by the hot pack to warm up the insulated pouch and the food:
q = mcΔT
q = (30.0 g)(c)(40°C - 25°C)
q = 450c J

The total heat transferred by the hot pack is the sum of these two values:
q total = 20400c J + 450c J
q total = 20850c J

Finally, we can use the heat transferred by the hot pack to solve for its specific heat capacity:
q total = mcΔT
20850c J = (30.0 g)(c)(85°C - 25°C) + (30.0 g)(c)(40°C - 25°C)
20850c J = 24000c J
c = 0.868 J/g°C

Therefore, the heat capacity of the hot pack is 0.868 J/g°C.

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Answer:

Answer: When the particles lose heat they move slower and have decreased kinetic energy.

The molarity of the solution is 0.619 M if we dissolve 23.4 g of manganese(ii) sulfate in a volumetric flask and add water to a total volume of 500 ml.

The molarity is equal to the moles of a solute divided by the total number of liters in the solution. The molarity of a material quantifies its concentration in a given volume of solution.

Molarity is the concept that describes the relationship between moles of a certain solute and the volume of the supplied solution. To calculate your molarity, you must start with moles and volumes, moles and milliliters, and mass and volumes.

Molarity formula and units

The units of molarity are M or mol/L.

Molarity equation

M = moles solute/liters solution

Molarity = number of moles of solute divided by the volume of solution in a liter

= number of moles of solute × 1000/ volume of solution in the liter

= number of moles

= Mass/ molecular weight

= 23.4/151

= 0.155moles

Molarity = 0.155× 1000/250

= 0.619 M

The concentration of manganese ion = concentration of sulphate ion = 0.619 M

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