MARKING BRAINLIEST
answer

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:

Explanation:

3.81 m. = 150 inches.

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

Answer:

answer

Explanation:

I think it's e hope it right

Answer:

2.059800664 x 10^47 moles

Explanation:

Answer:

Complete combustion occurs when there is enough oxygen to completely use up all the reactants. Incomplete combustion occurs when there is not enough oxygen resulting in the production of smoke, and less energy is produced when compared with complete combustion.

sink: w cube+w sand>Fb(buoyant force)

w cube = massless = 0

w sand>Fb

w sand > 1000 x 10 x (11/100)³

w sand > 13.31 N

ρgV sand > 13.31

3.5 x 10³ x 10 x V sand > 13.31

V sand = 13.31 : 3.5 x 10⁴ = 3.803 x 10⁻⁴ m³ = 380.3 cm³  

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:

57)a)increase

b)increase

c)pressure

58)

We know the formula

C is concentration and V is volume

The new volume will be by using the relation between molarity and volume formula.

Molarity, also termed as molar concentration in a solution, is a method of determining how much material is present in a chemical solution.

Calculation of volume with the aid of molarity formula is shown below:

Volume is calculated by using the molarity formula.

[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]

Where, M is molarity and V is volume.

It is given that, [tex]M_{1}[/tex] = 0.750 M , [tex]M_{2}[/tex] = 0.500 M, [tex]V_{1}[/tex] = 275 ml .

Now, put the value of given data in molarity formula.

[tex]M_{1} V_{1} = M_{2} V_{2}\\V_{2} = M_{1} V_{1} / M_{2}\\V_{2} = (0.750 M) (275 ml) / 0.500 M\\V_{2} = 183.34 ml[/tex]

Therefore, the volume will be 183.34 ml.

To know more about molarity click here.

https://brainly.com/question/2817451.

#SPJ2

Answer:

Explanation:

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

Answer:

744.0 mL

Explanation:

Formula obtained from Charles Law :

⇒ [tex]\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]

===============================================================

Given :

⇒ V₁ = 780.0 mL

⇒ T₁ = 30 °C = 303 K

⇒ T₂ = 16 °C = 289 K

=============================================================

Solving :

⇒ V₂ = 780 × 289 / 303

⇒ V₂ = 225420 / 303

⇒ V₂ = 744.0 mL (approximately)

Answer:

NaNO3 is the answer of given statement

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.

To learn more about the laser, refer to the Link ;

https://brainly.com/question/14783882

#SPJ1

Answer:

An expansion of suitable living space

Explanation:

Increase occurs in the population of the organism only occurs when there is a suitable environment present for that organism. Suitable environment means that place where all the needs of the organism are available such as food, water and shelter etc. If food and water are present in large amount and decrease in animals occurs that prey on that organism will increase the population of the organism.

Answer:

Chemical

Explanation:

Chemical energy is stored in the batteries of a flash light. When the flashlight is used, the Chemical energy that was stored, is then used to make Electrical energy for the flashlight. Then electrical energy is converted to heat in the filament of the flashlight bulb. Some of the heat is lost to the surroundings, and some is converted into light energy.

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.

Learn more about combustion reaction here:

https://brainly.com/question/11886957

#SPJ1

Answer:

c

Explanation:

c is correct i believe

Answer:

The top number is the total mass number, particles in an atom of an element that have mass are protons and neutrons.

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:

calcium sulphate and water

Answer:

B-The reaction is endothermic because energy is absorbed during the

reaction

Explanation:

CaCO3 -> CaO + CO2

endothermic means cooling

its decomposition of limestone to calcium oxide (quicklime) and carbon dioxide on heating

byjus

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.

[tex]2 HCl + Mg(OH)_2[/tex] → [tex]2 H_2O + MgCl_2[/tex]

[tex]3 Ca(ClO)_2[/tex] → [tex]2 CaCl_2[/tex] + [tex]Ca(ClO_3)_2[/tex]

[tex]2 KBr + Ca(NO_3)_2[/tex] →[tex]2 KNO_3 + CaBr_2[/tex]

[tex]2Al +6HCl[/tex] → [tex]2AlCl_3 +3H_2[/tex]

[tex]2C_2H_6+7O_2[/tex] → [tex]4CO_2+6H_2O.[/tex]

A balanced chemical reaction is an equation that has equal numbers of each type of atom on both sides of the arrow.

Balanced chemical equation:

[tex]2 HCl + Mg(OH)_2[/tex] → [tex]2 H_2O + MgCl_2[/tex]

[tex]3 Ca(ClO)_2[/tex] → [tex]2 CaCl_2[/tex] + [tex]Ca(ClO_3)_2[/tex]

[tex]2 KBr + Ca(NO_3)_2[/tex] →[tex]2 KNO_3 + CaBr_2[/tex]

[tex]2Al +6HCl[/tex] → [tex]2AlCl_3 +3H_2[/tex]

[tex]2C_2H_6+7O_2[/tex] → [tex]4CO_2+6H_2O.[/tex]

Learn about the balanced chemical equation here:

https://brainly.com/question/24245953

#SPJ1

Answer:

The law of constant proportion states that the percentage of each compound will stay constant regardless of the source size.

In other words, since 11.19% + 88.81% = 100%, in a 100 gram sample, these percentages will stay the same. In this case, 100% is "equal" to 100 grams.

So, 11.19 grams hydrogen and 88.81 grams oxygen will be present in a 100 gram sample of pure water.

Answer:

2fe2o3+3c=4fe+3co2

Explanation:

because 2×2 =4 fe &2×3=6 so we put it like 3co2

Answer:

Since the water is heavier, it displaces the lighter ice,

Explanation:

hope that helps

Answer:

B

Explanation:

Answer:

1 moles =6.9g

11.5moles= x

then we have x=79.35g

Deforestation often leads to an increase in the number of endangered species of plants and or animals.

Deforestation refers to the conversion of forests to non-forest uses. In other words, it is the removal of forest layers for non-forest reasons.

Since forests represent a hotspot for plant and animal biodiversity, their removal automatically means a decrease in biodiversity.

Endangered species are species of plants and animals that are under the threat of going extinct either due to natural or anthropological effects.

Thus, deforestation often leads to an increase in the number of endangered species.

More on deforestation can be found here:https://brainly.com/question/11697527

#SPJ4

Answer:

b

Explanation:

When natural conditions are present in a free market then, the natural monopoly arises. Dstv is unique and has no other substituents that make them an example of monopoly.

Monopoly is the dominance of a single product, goods, service, business, etc. in the market or the economic sector that excludes the other competitors. They can be the single seller that sells in the business.

DStv is a monopoly in America and includes natural gases, electricity, and communication services. It has no other competitor in the market and has control over others. They are the sole service provider and have no close substitutes.

Learn more about monopoly here:

https://brainly.com/question/27791498

#SPJ1