please answer this correctly​

Answer: 3.45

Explanation:

Answer:

they are the smallest of space rocks, when in the atmosphere they are called meteors.

Explanation:

i think this is right.

Chemical contamination is likely to occur when cleaning products are not stored properly.

Chemical contamination refers to the introduction of harmful chemicals into food, water or the environment. These chemical substances may come in contact with food and water in many ways.

The most common sources of chemical contamination are chemical substances that are not properly stored.

Hence, chemical contamination is likely to occur when cleaning products are not stored properly.

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Respuesta:

Las fuerzas intermoleculares que actúan entre las moléculas se clasifican en : Dipolos permanentes. Dipolos inducidos. Dipolos dispersos.

Explicación:

Dentro de una molécula, los átomos están unidos mediante fuerzas intramoleculares (enlaces iónicos, metálicos o covalentes, principalmente). Estas son las fuerzas que se deben vencer para que se produzca un cambio químico. Son estas fuerzas, por tanto, las que determinan las propiedades químicas de las sustancias.

Sin embargo existen otras fuerzas intermoleculares que actúan sobre distintas moléculas o iones y que hacen que éstos se atraigan o se repelan. Estas fuerzas son las que determinan las propiedades físicas de las sustancias como, por ejemplo, el estado de agregación, el punto de fusión y de ebullición, la solubilidad, la tensión superficial, la densidad, etc.

Answer:

88 gram is the answer in 2 significant digits

One mole of octane gives 9 moles of water. Then, 3.43 g or 0.03 moles of octane will give 0.27 moles of water that is 4.86 g of water can be produced.

Combustion is a type of chemical reaction in which a gas reacts with oxygen to give carbon dioxide and water.

The combustion reaction of octane is given as follows:

[tex]\rm C_{8}H_{18} + \frac{25}{2}O_{2} \rightarrow 8CO_{2} + 9 H_{2}O[/tex]

As per this balanced chemical equation, one mole or 114 g of octane gives 9 moles of water.

no.of moles in 3.4 g of octane = 3.4 g/114 g = 0.03 moles.

no.of moles of water produced from 0.03 moles of octane :

= (0.03 × 9) = 0.27 moles.

Molar mass of water = 18 g/mol

then, mass of 0.27 moles = 0.27 × 18 =4.86 g.

Therefore, the maximum mass of water that could be produced here is 4.86 g.

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Answer:

True

Explanation:

Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements. All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds.

Answer:

A compound is a unique substance that consists of two or more elements combined in fixed proportions.

Explanation:

okkk

Answer:

d

Explanation:

il answer in comments if you brainly me

Answer:

CaCl2 + H2CO3 -> CaCO3 + 2HCl

Explanation:

Balancing this equation was a relatively simple example. Making sure to have all parts on the left equal to the ones on the right is the most important part.

Ca 1 = 1

Cl 2 = 2

H 2 = 2

C 1 = 1

O 3 = 3

Answer:2HCl

Explanation: just did it

Answer:

i dont know the answer of this question... im sorry

Answer:

atmoshpere

Explanation:

il explain in comment if you brainly me

Answer:

A

Explanation:

Another way to say Density is Density

Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. The  density is mass divided by volume. the correct option is option A.

Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water. Density is mass divided by volume.

Mathematically, density can be written as : Density = Mass of the substance÷ volume marked on the graduated cylinder. Density is directly proportional to mass and inversely proportional to volume. Density of water is 1 gram per cubic centimeter.

Therefore, density is mass divided by volume. the correct option is option A.

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Answer:

41.184 pounds

Explanation:

Calculate the total grams first.

180 x 104 = 18,720 grams

Convert that into kilograms (kg)

18,720g         1 kg

------------ X  -------------  = 18.720 kg

     1              1000 g

Convert kilograms into pounds.

18.729 kg         2.2 lb

---------------  X  -----------   =  41.184 lb  (pounds)

       1                 1 kg

Answer:

Explanation:

When a solute is added to a solvent, the vapor pressure of the solvent (above the resulting solution) is less than the vapor pressure above the pure solvent. The boiling point of a solution, then, will be greater than the boiling point of the pure solvent because the solution (which has a lower vapor pressure) will need to be heated to a higher temperature in order for the vapor pressure to become equal to the external pressure (i.e., the boiling point).

The boiling point of the solvent above a solution changes as the concentration of the solute in the solution changes (but it does not depend on the identity of either the solvent or the solute(s) particles (kind, size or charge) in the solution).

I cant give you the answer but I hope this helps.

Answer:

specific question is hard for me too

The model of Neils Bohr postulates that electrons in atoms are found in specific energy levels. Transition from a higher to a lower energy level produces an emission spectrum characteristic of elements.

According to Bohr's model of the atom, an electron in atom exists in distinct energy levels. Electrons can be promoted from lower to higher energy levels when they absorb energy. The electrons are unstable in this higher energy excited state hence they quickly return to the ground state emitting energy. This emission is characteristic of elements.

The following statements are true based on the Bohr model;

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The characteristics of the ocean ridges allow finding the results to complete the statements are:

The oceanic ridges are mountain ranges or chains of volcanic mountains at the bottom of the ocean, in these the magma that rises cools and forms young rocks, in they are pushed by the other rocks that emerge, in general they are located on the edges of the tectonic plates .

Therefore, the oceanic ridges are the point where the earth's crust is separating, therefore it has the youngest rocks and in the furthest points it has the oldest.

Let's find the correct words for each phrase to be correct:

As a consequence of the characteristics of the ocean ridges, we can find the results to complete the statements  are:  

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Answer:

If the cell was a city, what would the city have inside it for it to function as a cell?

Explanation:

The cell membrane can be a fence or wall around the city because it controls what enters and leaves the cell, and separates the cell from the outside.

The nucleus could be the city hall because it  protects DNA and controls the cell (city)

The mitochondria could be the greenhouse because it makes ATP energy from sugar + 02

The chloroplasts could be a farm or garden because it is where photosynthesis takes place and makes energy + sugar from sunlight

The ribosomes could be the factory to make stuff because it makes proteins

The endoplasmic reticulum could be a kitchen or restaurant because it helps finish proteins, and makes membranes.

The golgi apparatus could be the postal office because it finishes packages and ships proteins

The vacuoles could be a water tank because it storages water

I hope this helps. It is basically as if something was turning into a city-type thing. Like Lysosome could be a recycling center in a city.

In the combustion of 28.0 g of gasoline, 1348.1 kilojoules of energy are released.          

To find the energy released, we need to convert the energy in kilocalories to kilojoules.

We need to remember that:

Hence, the energy in kJ is:

[tex] E = 322 \:kcal*\frac{4.1868 \:J}{1 \:cal}*\frac{1000 \:cal}{1 \:kcal}*\frac{1 \:kJ}{1000 \:J} = 1348.1 \:kJ [/tex]

Therefore, 1348.1 kilojoules of energy are released.

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I am the first one to comment, please give me the brainliest <3

Answer:

n2 is correct

Explanation:

i took it just now. :)

The product of this reaction could be N2.

Among the options, only atoms of nitrogen have five electrons on their outermost shell.

The fact that they have five electrons in their outermost shells implies that they can combine by sharing six electrons in a triple bond.

When this occurs, each of the nitrogen atoms involved in the bond now has an octet of electrons. Hence, the product formed when the atoms share six electrons. Which molecule could be the product of the reaction is N2.

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Answer:

.0000000000000000000003

Explanation:

In the reaction between Fe₂S₃(s) and HBr(aq), the sum of the coefficients for all reactants and products is 12.

If the reaction occurs between Fe₂S₃(s) and HBr(aq) and the equation is properly balanced with the smallest whole-number coefficients, what is the sum of the coefficients for all reactants and products?

Let's consider the unbalanced equation for the reaction between Fe₂S₃(s) and HBr(aq). This is a double displacement reaction.

Fe₂S₃(s) + HBr(aq) ⇒ FeBr₃(aq) + H₂S(g)

We will balance it using the trial and error method.

First, we will balance Fe atoms by multiplying FeBr₃ by 2.

Fe₂S₃(s) + HBr(aq) ⇒ 2 FeBr₃(aq) + H₂S(g)

Then, we will balance S atoms by multiplying H₂S by 3.

Fe₂S₃(s) + HBr(aq) ⇒ 2 FeBr₃(aq) + 3 H₂S(g)

Finally, we will get the balanced equation by multiplying HBr by 6.

Fe₂S₃(s) + 6 HBr(aq) ⇒ 2 FeBr₃(aq) + 3 H₂S(g)

The sum of the coefficients for all reactants and products is:

[tex]1 + 6 + 2 +3 = 12[/tex]

In the reaction between Fe₂S₃(s) and HBr(aq), the sum of the coefficients for all reactants and products is 12.

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