What must be happening, according to Newton's second law of motion, if a rigid body of unchanging mass is observed accelerating?


A force is being applied to the mass.


A force was once applied but is now not being applied.


The mass must be changing.


No force was or is being applied to the mass.

Answer:

anhydrous compound

Heating a hydrate leads to an endothermic reaction that produces a residue known as the anhydrous compound. This compound is different in structure, texture and even color in some cases, from its parent hydrate.

Warming a hydrate prompts an endothermic response that creates a buildup known as the anhydrous compound. This compound is distinctive in structure, surface and even shading now and again, from its parent hydrate.

Answer:

 Locations at a higher altitude have colder temperatures

Explanation:

brainliest please

Answer: The proportions of components can vary.

Explanation:

A mixture is a combination that has to do with two or more substances. Some characteristics or properties of mixtures are that the substances that are added together retain their properties.

Also, the proportion of the components can vary and the components can be separated.

Therefore, the answer to the question will be option 3 "The proportions of components can vary".

Answer:

185.92  L

Explanation:

Given data:

1 mole = 6.022× 10²³ molecules

1 mole = 22.4 L

Volume occupy by 5.0× 10²⁴ molecules

Solution:

1 mole = 6.022× 10²³ molecules

5.0× 10²⁴ molecules × 1 mole / 6.022× 10²³ molecules

0.83× 10¹ mol

8.3 moles

1 mole occupy 22.4 L

8.3 mol × 22.4 L / 1 mol

185.92  L

Answer:

of FeO into moles.ififdjdjjfjdjfjfjfjfjfjfjfjfjfjfjf

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.167moles are there in 12.0 g of FeO into moles.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.

Mathematically,

number of moles of FeO =given mass of FeO ÷ molar mass of FeO

Molar mass of FeO  =71.8444 g/mol

mass of FeO = 12.0 g

Substituting all the given values in the above equation, we get

number of moles of FeO  = 12.0  ÷71.84

number of moles of FeO =0.167moles

Therefore, 0.167moles are there in 12.0 g of FeO into moles.

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Answer:

yes

Explanation:

yes

The molecular formula of the liquid​ : C₆H₁₂

Given

molar ratio C H = 1.2 : 0.12

0.12 g at STP gave 32 cm³(0.032 L)

Required

The molecular formula

Solution

At STP, 1 mol = 22.4 L, so for 0.032 L :

mol = 0.032 : 22.4

mol = 0.00143

Molar mass (M) of liquid :

M = mass : mol

M = 0.12 g : 0.00143 mol

M = 83.92≈84 g/mol

C : H = 1 : 2

(CH₂)n=84

(12+2.1)n=84

(14)n=84

n=6

(CH₂)₆=C₆H₁₂

Answer:

unbalanced

Explanation:

got in right on study islands

To solve such we need to know the concept behind significant figures. Addition, subtraction, multiplication and division follow the rules of significant figures. Therefore, the correct option is option A that is 7.95 g.

Significant figures of a number in positional notation are digits in the number that are reliable and necessary to indicate the quantity of something.

Rules for counting the significant figures are :

Zeroes before non zero digits are not significant

Zeros between non zero digits are significant.

Zeroes after non zero digits are not significant.

When we add two decimal numbers then, the final answer would be according to the number which have least significant number.

7.94 g + 0.0132 g = 7.95g

Since among 7.94 and 0.0132, 7.94  has the least significant numbers that is 3. So, answer should have 3 significant figures, answer will be 7.95.

Therefore, the correct option is option A that is  7.95 g.

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Explanation:

This medication is used as a moisturizer to treat or prevent dry, rough, scaly, itchy skin and minor skin irritations (e.g., diaper rash, skin burns from radiation therapy). Emollients are substances that soften and moisturize the skin and decrease itching and flaking.

Answer:

D. Electrodes

Explanation:

A redox reaction is defined as the reaction in which both oxidation and reduction reactions take place and electrons are transferred from oxidized substance to the substance that is being reduced.

An electrochemical cell is consist of electrodes (anode and cathode), electrolyte solution, salt bridge, and conducing wire. An electrochemical cell undergoes redox reaction that produces an electric current due to the movement of ions through electrodes. Electrodes are the source of ions, as anode electrode undergoes oxidation reaction and releases electrons or ions and cathode, gains electrons through reduction reaction.

Hence, the correct answer is "D. Electrodes".

Answer: Sodium/Na

Explanation: Molar mass is basically a measure of how heavy 6.02 x 10^23 atoms of a substance is, measured in grams.

So, if Sodium has the lowest molar mass then that means it’s molecules are very light. I’ll give a comparison: if you have 10 kilograms of bricks and 10 kilograms of feathers, will you have more feathers or bricks? Feathers, of course.

Mathematically it looks like this

50g/22.99g/mol = 2.17 mol

2.17 mol • 6.02 x 10^23 = 1.31 x 10^24 atoms

50g/58.93g/mol = 0.85 mol

You can see that as molar mass increases that the number of moles, and consequently, atoms, decreases.

Hope this helped

The type of energy is given as under :

The sun transfers energy to the earth in the form of electromagnetic waves and the warm up the earth's upper air.

Some of the radiation that enters the earth get absorbed by the land surface. The sun is ths responcible for the energy distribution.

The visible light is part of wavelength that carries colors the human eyes can see. The infrared is the range that transfers the heat from the sun.

Find out more information about the Earth.

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The molality of the solution = 17.93 m

Given

6.00 L water with 6.00 L of  ethylene glycol(ρ=1.1132 g/cm³= 1.1132 kg/L)

Required

The molality

Solution

molality = mol of solute/ 1 kg solvent

mol of solute = mol of ethylene glycol

= volume x density

= 6 L x 1.1132 kg/L

= 6.6792 kg

= 6679.2 g

=mass : MW

=6679.2 : 62.07

=107.608

6 L water = 6 kg water(ρ= 1 kg/L)

[tex]\tt =\dfrac{107.608}{6}=17.93~m[/tex]

Answer:

it shrinks gradually, then suddenly gets a lot smaller.

Explanation:

During the initial cooling the balloon begins to shrink. At the point where the 2nd gas turns to liquid the volume reduces drastically because liquids take up much less volume than their gas counterparts.

Answer:

do you go to hphs?

Explanation:

cuz i need this for chemistry:/

Answer:

Explanation:

Tough question.

The answer is very dependent on the temperature of the water. At 0o C, less than 5 grams is soluble in water.

The curve increases as the temperature increases. At 80oC about 35 grams  is soluble in water 100 mL of water.  So Ba(OH)2 is very soluble at higher temperatures.

Maybe the question can be resolved just a little better at room temperature. The solubility is still less than 5 grams / 100 mL. That makes it slightly soluble or more soluble than other things.

So to answer the question, you need to specify the temperature. I would say it is, but be prepared to defend your answer.

Answer: 32

Explanation: but you can find them on goggle

Answer:

Freshwater is such a limited resource because there is such a little amount of freshwater found on Earth. About 77% of fresh water on Earth is frozen in glaciers and polar ice caps. Because of this, there is very little fresh water available for humans to use.

Explanation: Hope this helps.

Freshwater is a scarce resource, making up just around 3% of the total amount of water on Earth. Although freshwater is regarded as a renewable resource, certain areas utilize more freshwater than can be replaced by natural processes.

There is a very small amount of fresh water on Earth, making it a scarce resource. The polar ice caps and glaciers contain around 77% of the fresh water on Earth. This results in a relatively limited supply of fresh water for human use.

Since freshwater only accounts for around 3% of the total amount of water on Earth, it is a limited resource.

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Answer:

The nucleus

Explanation:

Answer:

2.47 L

Explanation:

The first thing we do is to write the balanced equation, which is.

CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)

Now, using ideal gas equation, we see that

PV = nRT

moles of methane

where P is the pressure, 1.65 atm

V is the volume, 2.8 L

R is the ideal gas constant, 0.0821

T is the temperature in Kelvin, 25 + 273 = 298 K

n = PV/RT

n of methane = 1.65 * 2.8 / 0.0821 * 298

n of methane = 4.62 / 24.47

n of methane = 0.189 mole

moles of O2:

PV = nRT

where P is the pressure 1.25 atm

V is the volume, 35 L

R is the ideal gas constant, 0.0821 L

T is the temperature, 31 + 273 = 304 K

n of O2 = 1.25 * 35 / 0.0821 * 304

n of O2 = 43.75 / 24.96

n of O2 = 1.75 mol

from the equation, the molar ratio between O2 and CH4 is 2:1, so therefore

no of moles of O2 = 2 * .0189 moles of methane = 0.378 mole

when 1 mole of CH4 --> 1 mole of CO2

1 mol of CO2 --> 22.4 L CO2

volume of CO2 at STP = [(0.189 moles of CH4 /1) * (1 mol of CO2)] / [(1 mole CH4) * (22.4L CO2)/(1 mol of CO2)] = 4.23 L

Next, we use the formula

P1V1 /T1 = P2V2/T2

where

P1 = 1 atm

V1 = 4.23 L

T1 = 273

P2 = 2.5 atm

T2 = 125 + 273 = 398 K, making V2 subject of formula, we have

V2 = P1V1T2 / T1P2

V2 = 1 atm * 4.23 L * 398 / 273 * 2.5 atm

V2 = 1683.54 / 682.5

V2 = 2.47 L

Answer:

D

Explanation:

I look the quiz

Answer:

Its The mean will be higher than the median and mode.

Explanation:

I took the quiz, be careful because some times the answers are in other order.

Answer:

If you put friction in to skating rink then obvioulsy the skaters wont be able to glide and skate.

Explanation:

friction is power that disturbes the moving power. places like skating rink and slides try to have the least amount of friction.

Answer: Either give off or gain electrons to make a total of 8

Answer: the water bottle

Explanation:

yuh

One of the basic states of matter, described as having a distinct shape, size, and organized structure, is solid. The constituent particles of solids have fixed positions and oscillate around their mean positions. Solids also have distinct borders. Here the solid is a water bottle.

The atoms and molecules in a solid are so tightly bound together that they vibrate in situ rather than moving. Liquids have a fixed volume but can flow to change their shape. Atoms and molecules are only weakly bound together in liquids.

In the water bottle, a solid is a water bottle and water is a liquid. Solids' molecules continue to be tightly packed. Solids' molecules don't move about freely in all directions; instead, they stay stationary.

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Answer:

[He]2s^2: Be

[Ne]3s^23p^5: Cl (thats an L, not an i)

[Xe]6s^1: Cs

[Ar]4s^23d^9: Cu

SO IN ORDER IF YOU DONT WANNA READ ALL THAT

Be

CL

Cs

Cu

Explanation: Edge :)

Answer:1 Be 2 CL 3 Cs 4 Cu

Explanation:

Answer:

For example, the compound FeSO4 is called iron(II) sulfate, because it contains Fe2+.

Explanation:

please mark me as brainliest thank you

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question we have

[tex]density = \frac{100}{2.4} \\ = 41.66666...[/tex]

We have the final answer as

Hope this helps you