Which tool should Darla and Rob use to measure the force that pulls a car down the map

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.

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

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:

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:

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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Answer:

d

Explanation:

il answer in comments if you brainly me

Answer:

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

Answer:

2Ca +O2 ----------> 2CaO ( Balanced Reaction)

The balanced chemical equation for the standard formation reaction of solid calcium oxide (CaO) is

Ca + O2 --> CaO2

A balanced chemical equation is an equation in which the the number of atoms of each elements on both the reactant and products sides are equal.

Calcium oxide is an alkaline which is solid at room temperature and is formed by the reaction of one atom of calcium and two atoms of oxygen.

Therefore, the balanced equation of formation reaction of solid calcium oxide (CaO) is Ca + O2 --> CaO2.

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Answer:

15.75 J

Explanation:

Potential energy

= mgh

= 3,500 g × 10 m/s² × 0.45 meters

= 3.5 kg × 4.5 m²/s²

= 15.75 J

Answer:

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

Explanation:

i think this is right.

Answer: 3.45

Explanation:

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.

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:

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:

atmoshpere

Explanation:

il explain in comment if you brainly me

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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Answer:

specific question is hard for me too

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:

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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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:

1k km

Explanation: