HELP!!
Which of the following statements best explains why oil does not dissolve in water?
A.
Polar water molecules attract each other more strongly than they attract nonpolar oil molecules.
B.
Polar water molecules attract each other less strongly than they attract nonpolar oil molecules.
C.
Water molecules and oil molecules are both polar and attract each other equally well.
D.
Water molecules and oil molecules are both nonpolar and attract each other equally well.

Answer:

There are many items that could be altered to test the reaction of another. These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.

Explanation:

370,149.12 centimeters

We want to perform some changes of units, such that the number of significant figures (the ones different than zero) does not change.

a) 75 cm to ft

We know that:

1ft = 30.48cm

1 = (1ft)/(30.48cm)

Now, remember that if we multiply a quantity by one we do not affect the quantity, so we can write:

75cm = 75cm*(1ft)/(30.48cm) = 2.5 ft

b)  0.668 kg to lb

we know that:

1kg = 2.20462 lb

then:

1 = (2.20462 lb)/(1kg)

0.668 kg = 0.668 kg*(2.20462 lb)/(1kg) = 1.47 lb

c)  0.549 uL to qt

We know that:

1 uL = 3.437*10^-9 qt

1 = (3.437*10^-9 qt)/(1 uL)

Then:

0.549 uL = 0.549 uL*(3.437*10^-9 qt)/(1 uL) = 1.91*10^-9 qt

d) 9.991 mm to km

we know that:

1mm = 1*10^-6 km

then:

1 = (1*10^-6 km)/(1mm)

So we can rewrite:

9.991 mm = 9.991 mm*(1*10^-6 km)/(1mm) = 9.991*10^-6 km

e)  313 nm to mm

We have:

1nm = 1*10^-6 mm

1 = ( 1*10^-6 mm)/(1 nm)

Then:

313 nm*( 1*10^-6 mm)/(1 nm) = 3.13*10^-4 mm

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Answer:

AU is homoatomic

Explanation:

Homo-atomic Molecule: Molecules provided by unique one variety of particles are associated as Homo-atomic molecules

Ex: H2, N2, P4 etc.

Hetero-atomic Molecule: Particles constituted by several kinds of atoms are identified as Hetero-atomic molecules

Ex: CO2, NO2, CH4, HCl etc

As AU is homoatomic because this element is formed by only one atom

To learn more about atomic structure refer:

The first quarter moon occurs halfway between new moon and full moon.

From our perspective, the moon is partially lighted and is 90 degrees away from the sun in the sky.

We refer to it as the "first quarter" since the moon has only circled the Earth once since the new moon.

From Earth, you can view one-quarter of the moon, or half of the moon's illuminated side, which seems to be one-half of a pie.

Therefore, The first quarter moon occurs halfway between new moon and full moon.

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Answer:

the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.

Explanation:

Mark me as brainiliest

Answer:

Agriculture is a practice of farming, including cultivation of the soil for growing crops and the rearing of animals to provide food,wool and others.

Taking into account the definition of density and change of units, if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.  

First you must know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is the relationship between the weight (mass) of a substance and the volume it occupies (that same substance). Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

On the other side, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

That is, what is intended with it is to find the fourth term of a proportion knowing the other three.  

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.

To solve a direct rule of three, the following formula must be followed, where a, b and c are known values ​​and x is the value to be calculated:

a ⇒ b

c ⇒ x

So, [tex]x=\frac{cxb}{a}[/tex]

The direct rule of three is the rule applied in this case where there is a change of units. To perform conversion of units from pounds to grams, you must first know that 1 lb = 453.59 g. So, if 453.59 g is 1 lb, how many grams equals 62 lb?

[tex]mass= \frac{62 lbx453.59 g}{1 lb}[/tex]

Solving:

mass= 28122.58 grams

Then, you know:

Replacing in the definition of density:

[tex]0.720\frac{g}{cm^{3} }=\frac{28122.58 g}{volume}[/tex]

Solving:

volume×0.720 [tex]\frac{g}{cm^{3} }[/tex]= 28122.58 g

[tex]volume=\frac{28122.58 g}{0.720\frac{g}{cm^{3} }}[/tex]

volume= 39059.14 cm³= 39059.14 mL= 39.05914 L (being 1 cm³= 1 mL= 0.001 L)

Now, to perform conversion of units from L to qt, you must first know that 1 qt = 0.94635 L. So, if 1 qt is 0.94635 L, how many qt equals 39.05914 L?

[tex]volume= \frac{39.05914 Lx1 qt}{0.94635 L}[/tex]

Solving:

volume= 41.2735 qt

Finally, to perform conversion of units from qt to gal, you must first know that 1 gal = 4.0000 qt. So, if 1 gal is 4 qt, how many gal equals 41.2735 qt?

[tex]volume= \frac{41.2735 qtx1 gal}{4 qt}[/tex]

Solving:

volume= 10.3184 gal

In summary,  if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.  

Learn more about density:

Answer:

he formula mass of ammonia is 14 + 1 3 = 17. The number of moles in 36 g ammonia is 36/ 17 = 2.11mol. A mole is 6.02 10, so the number of hydrogen atoms in a 2.11 moles of ammonia is 2.11 *6.02*10^23 = 1.27 *10^24 atoms

Explanation:

Answer: 3 cm

Explanation:

Answer:

d.MgNa2+Cl2S

Explanation:

the reaction should balance on both sides

Answer:

1.9

Then

-75.4 C

Explanation:

In tHe PiCtuRe

Answer:

The answer for this is (B: Heat)

Answer:

Equilibrium composition for, no2 =.7365

The equilibrium composition for,  nN2=3.76

Explanation:

Answer:

There are 1609.344 meters in a mile

Explanation:

Answer:

please I don't understand the question, rewrite it

Answer:

1. Cations are positively charged and have less electrons than protons.

2. Anions are negatively charged and have more electrons than protons.

3. Columns on the periodic table are known as groups.

4. The elements in the first group are called alkalis metals and have one valence electron.

Explanation:

In 1 hour, 2.344 × 10¹⁶ kJ of solar energy reaches the United States.

The entire area of the United States is 9,158,960 km². We will convert it to m² using the conversion factor 1 km = 10³ m, squared.

[tex]9,158,960 km^{2} \times (\frac{10^{3} m }{1km} )^{2} = 9.158960 \times 10^{12}\ m^{2}[/tex]

In order to find the amount of solar energy that reaches 9.158960 × 10¹² m² we will use another conversion factor: 2559 kJ of energy reaches a square meter of the United States in one hour.

[tex]9.158960 \times 10^{12}\ m^{2} \times \frac{2559 kJ}{m^{2}.h } = 2.344 \times 10^{16} kJ/h[/tex]

In 1 hour, 2.344 × 10¹⁶ kJ of solar energy reaches the United States.

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Answer:

c

Explanation:

esuba is activation energy

Answer:

The energy stored within things :)

Answer:

The atom that has lost an electron becomes a positively charged ion (called a cation)

Answer: it’s a cation

Explanation:

Answer:

the importance of the periodic table are,

To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

hope its help for you

thank you

have nice day

Answer:

b

Explanation:

edge 2021

The best describes the light that will cause emission of electrons from a given metal through the photoelectric effect is " light with a high enough frequency. "

When electromagnetic radiation, like light, strikes a substance, the photoelectric effect would be the generation of electrons.

The smallest atom-forming particle is an electron, which has negatively charged.

The photoelectric effect would be a phenomenon where electrically charged particles were released from or contained within a substance as electromagnetic radiation will be absorbed. The effect is often referred to as the emission of electrons from such a metal plate when light strikes it.

Therefore, the correct answer will be option (B).

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eu vou colocar V(verdadeiro) F (falso)

1:F  

2:F

3: V

4:F

explicação:

1 procariontes não apresentam núcleo

2 eles podem sim caso  contrário os seres procariontes não sobreviveriam

3   ele possui organelas celulares

4 as células eucariontes são maiores e mais complexas.

CONCLUSÃO: a resposta certa é a 3

Answer:

i don't understand

Explanation:

Ii don't understand

Density is simply defined as the mass per unit volume of a substance. Mathematically, it is expressed as:

[tex]Density = \frac{mass}{volume }[/tex]

To solve the question given above, we'll begin by calculating the volume of the metal. This can be obtained as follow:

Volume of water = 25 mL

Volume of water + metal = 46.5 mL

Volume of metal = (Volume of water + metal) – (Volume of water)

Volume of metal = 46.6 – 25

Finally, we shall determine the density of the metal. This can be obtained as follow:

Mass of metal = 254 g

Volume of metal = 21.5 mL

[tex]Density = \frac{mass}{volume }\\\\Density = \frac{254}{21.5} \\[/tex]

Therefore, the density of the metal is 11.81 g/mL

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Answer:

some of them not believe in God

Answer:

[tex]because \: e = p \\ but \: e < p \\ therefore \: (c) \: is \: the \: right \: answer[/tex]