What makes this lever effective?
A: The man had more mass than the rock
B: The man is closer to the fulcrum than the rock is
C: The man is farther from the fulcrum than the rock is
D: The rock has more mass than the man

Answer:

Here down below is the equation

Explanation:

Iron (III) chloride can be produced by the reaction shown in this equation:

2Fe +3C2 (arrow) 2FeCl3

Calculate the maximum mass of Iron (III) chloride that can be produced from 11.20 grams of iron?

Relative atomic masses: Cl= 35.5 , Fe =56

The maximum mass of iron(|||) chloride(FeCl₃) that can be produced from 11.20g of iron is 0.069 grams.

Mass can be defined as inertia is a quantitative measure of a fundamental feature of all stuff.

It can also be defined as weight is defined as the force exerted by an item while mass is defined as the amount of matter in an object.

The SI unit of mass is kilogram or gram.

Mass can be expressed as

Mass =  Given mass of substance / Formula mass

Mass of substance = 11.20 g

Formula mass of FeCl₃ = 162.2

So, mass = 11.20 g / 162.2 g

               = 0.069 grams

Thus, the maximum mass of iron(|||) chloride(FeCl₃) that can be produced from 11.20g of iron is 0.069 grams.

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Answer: times it by 5

Explanation:

Answer:

Apply cool compresses to the skin. Use topical treatments to relieve itching, including calamine lotion, oatmeal baths, Tecnu, Zanfel, or aluminum acetate (Domeboro solution). Oral antihistamines, such as diphenhydramine (Benadryl), can also help relieve itching.

Answer:

Reverse Osmosis

Explanation:

Reverse osmosis systems are able to remove more contaminants than carbon, making them a popular choice for many consumers.

The phase of water at 0.5 atm and 100°C is gaseous phase.

Water exists in three different phases such as liquid, gas, and solid.

The phase of the given water can be determined using phase diagram at standard temperature and pressure as shown in the image uploaded.

At 0.5 atm and 100 °C, the water is still in vapour or gaseous phase.

Thus, the phase of water at 0.5 atm and 100°C is gaseous phase.

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Answer:

1.1 M

Explanation:

The formula mass of sodium hydrogen carbonate is about 23+1+12+3(16)=84 g/mol, so 96 g is about 1.142 mol.

molarity = (moles of solute)/(liters of solution) = 1.1 M

The presence of lead in Flint's water is what caused the death of 12 people.

Option A.

The Flint water crisis started in 2014 when the city of Flint, Michigan, switched its water source from Lake Huron to the Flint River as a cost-cutting measure.

The water from the Flint River was more corrosive and caused lead to leach from the pipes, contaminating the drinking water. This led to high levels of lead in the drinking water, which is a potent neurotoxin that can cause a variety of health problems, particularly in children.

The contamination also led to an outbreak of Legionnaires' disease, a severe form of pneumonia, which was linked to at least 12 deaths in the area.

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As both the ions have charge of +2 the compound formed is PbMg as the like charges will cancel out each other.

An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.

Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.Ions of opposite charges combine in ionic compounds.

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Answer:

Explanation:

3.81 m. = 150 inches.

I can't find explanation. Hope this is my best!

Answer:

siren wavelength of 0.0068 meters, frequency you hear = less than 5000 Hz

Explanation:

Q.A police siren passes you with a frequency of 5000 Hz. Which correctly describes the sound wave after the police car passes you? The speed of sound is 340 m/s.

(a) siren wavelength of 0.0068 meters, frequency you hear = less than 5000 Hz

(using doppler's effect)

Doppler effect is the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by the relative motion of the observer and the wave source.

Christian Johann Doppler, an Austrian mathematician, and physicist discovered the Doppler effect in 1842.

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It totally depends on the laser power (mW). The divergence of the light is depending on it.

A device that uses stimulated emission of photons from excited atoms or molecules to produce a strong beam of coherent monochromatic light is a laser.

When electrons in optical materials like glass, crystal, or gas absorb energy from an electrical current or light, a laser is formed.

When a 5mW 650 nm laser glows on a white surface in complete darkness, we can see it from 500 to 1 km distant.

Because of the divergence, the projected dot 1 km distant will be a huge dot with a diameter of 20–30 m30 m and will be extremely dim.

Hence,It totally depends on the laser power (mW). The divergence of the light is depending on it.

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At constant temperature, if the volume of the gas is doubled, the pressure also doubles. The new pressure of the gas is 50°C.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

V₁/T₁ = V₂/T₂

Given that;

If final volume is double of initial volume.

V₁/T₁ = V₂/T₂

V₁T₂ = V₂T₁

T₂ = V₂T₁ / V₁

T₂ = ( 1000cm³ × 25°C ) / 500cm³

T₂ = 25000m³°C / 500cm³

T₂ = 50°C

At constant temperature, if the volume of the gas is doubled, the pressure also doubles. The new pressure of the gas is 50°C.

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Answer:

47

Explanation:

Based on the law of conservation of mass, there is no loss in mass in the reaction, however carbon dioxide gas is evolved.

The law of conservation of mass states that for a chemical change occurring, the sum of masses before and after the reaction is constant.

Based on the law of conservation of mass, the reaction between 10.04g of calcium carbonate and 20cm3 of 1m hydrochloric acid will have the same mass before and after the reaction. Any change in mass will be due to evolution of carbon dioxide gas.

Therefore, there is no loss in mass in the reaction, however carbon dioxide gas is evolved.

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Answer:

it stays the same

Explanation:

Even though the volume of water changes as it becomes ice, the mass of the water should remain the same before and after it turns into ice.

Answer:

Stage 3 or long-term immersion hypothermia happens after 30 minutes or more. Cold water pulls heat from the body, and the body’s core temperature drops. This eventually leads to loss of consciousness and death.

Answer:

CoBr2

Explanation:

Hope it helps you :))))

have a good day

Answer:

female reproductive structures

Answer:

the correct answer is a. the lewis structure represents only the outer energy level

A combustion reaction is a reaction that reacts with oxygen to produce the product. 3.5 moles of methane release - 3115 kJ/mol of heat.  

A combustion reaction is a chemical reaction that involves the burning of the reactant in the presence of the oxygen molecule to release heat.

The balanced reaction of methane combustion is given as:

CH₄(g) + 2O₂ (g) → CO₂(g) + 2H₂O (l), ΔH = -890 kJ/mol

From the reaction, it can be said that 1 mole of methane combusts to produce -890kJ/mol enthalpy.

So, 3.5 moles will produce, 3.5 × -890kJ/mol = - 3115 kJ/mol.

Therefore, 3.5 moles of methane produce - 3115 kJ/mol heat.

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The wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × 10-¹⁰m.

The wavelength of a wave can be calculated by dividing the speed of the wave by its frequency.

According to this question, a wave has a frequency of 1.82 x 10¹⁸ Hz in a vacuum and speed of light in a vacuum is 3.00 × 10⁸ m/s.

wavelength = 3 × 10⁸ ÷ 1.82 × 10¹⁸

wavelength = 1.65 × 10-¹⁰m

Therefore, the wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × 10-¹⁰m.

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Answer:

This is a scientific model.

Explanation:

A scientific model is a representation of systems of ideas, events or processes.

This drawing offers explanations that enables the water cycle to be predicted.

Answer:

It would decrease.

Explanation:

This is because there is not enough food (ant) for the ant-lion group.

Answer:

see below

Explanation:

water  pH ~ 7     acids are less than 7                bases are > 7

Answer:

What is the hydrogen ion concentration of a solution labeled "Solution A", whose pH is 5.60? 

Tutorial

In this problem we are given pH and asked to solve for the hydrogen ion concentration. Using the equation, pH = − log [H+] , we can solve for [H+] as,

− pH = log [H+] ,

[H+] = 10−pH,

by exponentiating both sides with base 10 to "undo" the common logarithm. The hydrogen ion concentration of "Solution A" is,

[H+] = 10−5.6 ≈ 0.0000025 = 2.51 × 10−6 M.

We can always check our solution by computing −log (2.5 × 10−6) ≈ 5.6.

The atomic number of sodium atom (Na) is 11.

Atomic number of any atom is denoted by the symbol Z, and it is equal to the number of protons or electrons present in that atom.

In the sodium atom, number of proton is equal to 11 and number of electrons is also equal to 11. So the atomic number of sodium atom is 11.

Hence atomic number of sodium is 11.

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The atomic number of sodium is 11.

1. The atomic number of an element represents the number of protons in the nucleus of its atom.

2. Sodium is an element with the symbol Na, and its atomic number can be found on the periodic table.

3. Locate sodium (Na) on the periodic table. It is in the third period and belongs to Group 1, also known as the alkali metals.

4. The atomic number is usually displayed above or below the element's symbol. In the case of sodium, the atomic number is 11.

5. Therefore, the atomic number of sodium is 11. It means that a neutral sodium atom has 11 protons in its nucleus.

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Answer:

Explanation:

Process of desalination is used to remove salt from seawater for provision of fresh water

Answer:

[tex]\\ \rm\dashrightarrow Chemical\: Equation [/tex]

Explanation:

When a chemical change happens or chemical reaction happens something yields at reactants and something at products

Representing them is called chemical equation

Answer:

calcium sulphate and water