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Answer:

Weak acids and bases are only partially ionized in their solutions, whereas strong acids and bases are completely ionized when dissolved in water.

Explanation:

Land slides are slopes of rocks in river side. The landslides are formed by the mass movement, volcanoes, earthquakes etc.

The sliding down of a slope of a mass of rock, rubble, or earth is known as a landslide. Landslides are a sort of "mass wasting," which refers to any downward movement of soil or rock caused by gravity alone. Five different slope movement types are referred to as "landslides": falls, topples, slides, spreads, and flows.

By the type of geologic material, these are further separated (bedrock, debris, or earth). Common landslide types include debris flows, often known as mudflows or mudslides, and rock falls.

Rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance from human activity, or any combination of these causes might start a landslide on a slope that was already about to move.

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The amount of W : = 1.22 x 10²⁰

Given

5.6 mg of a micro computer

Required

The amount of chip

Solution

A mole is a number of particles(atoms, molecules, ions)  in a substance

1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mass = 5.68 mg = 5.68 x 10⁻³ g

mol :

= mass : MW

= 5.68 x 10⁻³ g : 28 g/mol

= 2.03 x 10⁻⁴

The number of atoms :

= 2.03 x 10⁻⁴ x 6.02.10²³

= 1.22 x 10²⁰

Answer:

D

Explanation:

A beaker can be used for boiling coz it can withstand high temperatures.

It can be used for measuring the volume of a solid indirectly by measuring the displacement of a liquid.

It can as well be used for mixing coz it flat bottomed

Answer:

Distance=160 meters, Displacement = 40 meters right

Answer:

B

Explanation:

A P E X

After a lightning storm, the Rodriguez family notices the TV is no longer working because a power surge burned an electric component of the TV. The correct option is B.

Lightning is a natural phenomenon that occurs when there is a collision of negative and positive charged particles. It appears as light or spark of electricity into the earth. It shines and affects the eyes if directly seen.

Lightning occurs when there is thunder or rain, lightning causes destruction to the earth, the houses, trees, and people are also impacted by this. The TV was not working because there was a short circuit due to lightning.

Thus, the correct option is B. A power surge burned an electric component of the TV during a lightning storm.

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Answer:

Mouth

Explanation:

Both mechanical and chemical digestion occur in the mouth. Teeth grind and break up food (mechanical), while an enzyme in saliva called amylase begins to break down carbohydrates (chemical). After it is swallowed, the chewed food (now called a bolus) moves down the esophagus.

Hope this helps! :)

Answer:

the answer is c I believe

To solve such this we must know the concept of combustion reaction. Therefore, the correct option is option A that is when the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

Combustion reaction is a reaction in which a substance, basically hydrocarbons burns in presence of oxygen to produce carbon dioxide and water and heat in large amount. When the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products is the correct statement.

Therefore, the correct option is option A that is when the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products.

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Answer: Elements found in group 1 (Alkaline Metals)

Explanation: Any element found in group 1, such as Lithium, Sodium, Caesium, or Francium, have similar properties as potassium. Atoms that are found in the same group on the periodic table have similar chemical properties.

Answer:

c

Explanation:

Answer:

b. equal too

Explanation:

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants

Answer:

The correct response is "3.127 weeks". A further explanation is given below.

Explanation:

As we know,

y = 1.3431x

Use, y = 4.2 cm

Now,

⇒ [tex]y = 1.3431x[/tex]

On substituting the values of y, we get

⇒ [tex]4.2=1.3431x[/tex]

⇒ [tex]x = \frac{4.2}{1.3431}[/tex]

⇒    [tex]=3.127 \ weeks[/tex]

Answer: Answer is A

Explanation:

The endoplasmic reticulum and the Golgi complex together make the endomembrane system. They are like factory and shipping departments. thus, option A is correct.

The endoplasmic reticulum (ER) is the membrane-bounded organelle that is a network-like structure that even has ribosomes attached to it (RER). They are the site of lipid and protein synthesis in the eukaryotic cell.

Golgi on the other hand, are organelle present in the cytoplasm that is the site of the packaging, storage, and transportation of the lipids produced by the ER to the other sites or out of the cell.

The endoplasmic reticulum act as a factory that manufactures lipids and proteins, whereas the Golgi act as a shipping department that packs and transports the molecules in vesicles to various sites.

Therefore, option A. ER acts as the factory and Golgi as the shipping department.

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Answer:

when two substances come together to create heat.

Explanation:

there have to be something to create heat.

Answer:

Because they all have different characteristics and they are not just things that the scientists say. they are all different but some of them have the Same charateristics

Answer:

D

Explanation:

D is the answer lolyeshsjs

Answer:

Elements lose electrons.

Explanation:

Answer:

good: We can reuse the fuel from nuclear energy projects.

bad 1: There is always the threat of an accident when working with nuclear energy

bad 2: Exposure to nuclear materials or uranium can create health problems

Explanation:

Answer:

benefits: lots of energy produced from small amounts of uranium it also does not pollute the air

risks: A nuclear power accident can make an entire region unlivable, have a negative effect on the environment for years to come, kill thousands of people, create a spike of cancer rates within nearby communities, kill off endangered fish populations (depending on their location), destroy local food supplies, etc.

Nuclear energy can also be turned into explosive devices that can be used to create powerful yields Nuclear energy creates harmful waste. Nuclear energy burns cleanly, which is seen as an advantage. It also creates radioactive waste that is toxic to the environment and dangerous to humans. If this waste is not disposed of properly, then the damage it causes may last for hundreds, if not thousands, of years. In the United States, damages that are directly associated with the storage of nuclear waste materials is estimated to be at least $38 billion. Politico reports that the costs could be as high as $65 billion.

Explanation:

Answer:

1.5 atm

Explanation:

Answer:

hello your question is incomplete below is the missing part of the question

Keisha makes a table to compare plasmas and solids.

Plasma      

Solid

Kinetic energy

X

Density

Y

Which labels belong in the cells marked X and Y? X: High Y: High X: High Y: Low X: Low Y: High X: Low Y: Low

answer : X: High Y:High

Explanation:

The labels that belong in the cells are ;   X: High Y:High   this because when comparing Plasma and Solids the variables; X and Y have positive correlation hence when X is High, Y will be High as well

Answer:

a

Explanation:

Answer:

C.) evaporation

Explanation:

When water absorbs enough heat, it becomes a gas (water vapor). This process is called evaporation.

I hope this helps! :)

Answer:

is there no options?

Explanation:

Answer:

26.314KJ

Explanation:

The specific heat capacity formula is : [tex]Q=mc[/tex]Δ[tex]T[/tex], where Q is the heat energy, m is the mass, c is the heat capacity of the material, and delta T is the change in temperature.

We know from the question that m = 386grams and delta T = 100.0°C - 24.0°C = 76.0°C. From a simple search, we know the specific heat capacity of aluminum = 0.897J/g°C (this changes a little bit depends on the website you use, but the value should be very similar). Let's apply the formula:

[tex]Q=mc[/tex]Δ[tex]T[/tex]

[tex]Q = 386g (0.897J/gC)(76.0C)[/tex]

[tex]Q = 26314J[/tex] or [tex]26.314KJ[/tex]

Round according to your teacher's specification (example: significant figures) if needed.

Answer:  " [tex]1.41 * 10^{24}[/tex] " atoms of aluminum (Al) .

____________________________________

Explanation:

_________________________

Using a technique called "dimensional analysis" ; as follows:

________________________

→  " [tex]\frac{2.34 mol Al}{1} * \frac{6.022*10^{23}atoms Al}{1 mol Al} = ?[/tex]  

________________________

The units "mol Al" ["moles of aluminum"] cancel out; and we have:

________________________

→  "[tex][(2.34) * (6.022 * 10^{23})] = ?[/tex] atoms of Al [aluminum].

________________________

Note that by definition: 1 (one) "mole" (abbreviated "mol") of anything consists of " [tex]6.022*10^{23}[/tex] " units " of that particular thing.

 This number:  6.022*10^{23} —is known as:  "Avogadro's number".

________________________

→  [ 2.34 * 6.022 * 10^23] ;

     = 1.409148 * 10^24 ;

                → Round to 3 (Three) significant figures;

                →  since: "2.34" has 3 (Three) significant figures;

                  →  to get: " [tex]1.41 *10^{24}[/tex]  atoms of aluminum (Al).

________________________

Hope this is helpful to you!  Wishing you the best!

________________________

mass of Aluminum produced = = 2.647 kg

moles of Oxygen = 73.53 moles

Given

5.0 kg Al₂O₃

Required

moles of Oxygen

Solution

The aluminum oxide gets decompose into aluminum and oxygen gas.

Reaction :

2Al₂O₃(s)⇒ 4 Al(s) + 3O₂(g)

mol of Al₂O₃(MW=102 g/mol) :

= mass : MW

= 5000 g : 102 g/mol

= 49.02 moles

From the equation, mol ratio of Al₂O₃ : O₂ = 2 : 3, sol mol O₂ :

= 3/2 x mol Al₂O₃

= 3/2 x 49.02

= 73.53 moles

mol Al :

= 4/2 x mol Al₂O₃

= 2 x 49.02

= 98.04 moles

Mass Al :

= mol x Ar Al

= 98.04 x 27 g/mol

= 2647.08 g

= 2.647 kg

Answer:

chemical bonds and covalent bonds

Explanation: covalent bonds are in which the valence electrons density is shared between two atoms and  chemical  bonds are the connections between atoms in a molecule . electrons  can be either free [not attached to any atom] or bound to nucleus of an atom. atom or molecule is a number of an ion which is either positive or negative. when we combine ion we can only combine elements with ionic bonds.  when atoms join together , they form chemical bonds without transferring any electrons but they rather share them. copper sulphide  are the last shell that are shared with bonding . proteins, carbohydrates, lipids are the example of macromolecules .  nucleic acids, lipids, proteins, carbohydrates are the main atoms involved in carbon chemistry.

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