Sieving is a technique used to separate mixtures containing solid particles of
(a) small sizes
(b) large sizes
(c) the same sizes
(d) different sizes

Answer:

It all comes down to form. When the paper is smooth, it exposes a large surface to the air beneath it which slows its descent. Once it is crumpled, the surface which comes in contact with the air is much smaller, allowing it to fall much faster.

Answer:

is 7.................

Answer:

The correct answer is Heterogeneous mixture

Explanation:

Heterogeneous mixture are those mixture in which:

Substance is distributed in non uniform manner.

Two distinct layers are formed

Thus when water and dirt are mixed together it results in the formation of  a heterogeneous mixture and after sometimes two different layers will be observed.

Hence, in the bottle there is a heterogeneous mixture of water and dirt.

Answer:

True

Explanation:

IT IS TRUE WIWJJWOWIWHW

Answer:

13.4 mol Ar

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

534 g Ar

Step 2: Identify Conversions

Molar Mass of Ar - 39.95 g/mol

Step 3: Convert

[tex]534 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar} )[/tex] = 13.3667 mol Ar

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

13.3667 mol Ar ≈ 13.4 mol Ar

Answer:

The number of moles in 452 grams of Argon is 13.31 moles.

Explanation:

Answer:

The average atomic mass of neon20.18 amu.

Answer:

c. 64 grams

Explanation:

What is the proper combining ratio (by mass) for carbon to oxygen in the reaction that forms carbon dioxide (CO 2)? From the data given in question 1, since 64 grams of oxygen reacts with 24 grams of carbon, the ratio must be 64 to 24, which is 2.7 parts oxygen to 1 part carbon.

Answer:

The blue color of the sky is caused by the scattering of sunlight off the molecules of the atmosphere.

Explanation:

Answer:

sun shine

Explanation:

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time

Answer:

How much heat energy required to convert following?

How much heat energy, in kilojoules, is required to convert 47.0 g of ice at -18.0 C to water at 25.0 C ?

Specific Heat of Ice - 2.09 j/g * c

This is how I did it and the answer is wrong...Please check and correct me

Q = m * Cice * Change in Temp

Q = (47.0 g)(2.09 J/g*c)(43) = 4222.6 J * 0.001 kj / j = 4.22 kj

Answer:

If u use math why It will give u the answer like 3x3=9

Explanation:

Answer: 40.3 L

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]

[tex]\text{Moles of} Sb_2O_3=\frac{175g}{291.5g/mol}=0.600moles[/tex]

[tex]Sb_2O_3+3C\rightarrow 2Sb+3CO[/tex]  

According to stoichiometry :

1 moles of [tex]Sb_2O_3[/tex] produces = 3 moles of [tex]CO[/tex]

Thus 0.600 moles of [tex]Sb_2O_3[/tex] will produce=[tex]\frac{3}{1}\times 0.600=1.80moles[/tex]  of [tex]CO[/tex]

Volume of [tex]CO=moles\times {\text {Molar volume}}=1.80moles\times 22.4L/mol=40.3L[/tex]

Thus 40.3 L of CO is produced.

The substance is not produced during the electrolysis of concentrated aqueous sodium chloride is D) Sodium chloride​

while an electric current is handed via concentrated sodium chloride answer, hydrogen gasoline bureaucracy at the negative electrode, chlorine gas bureaucracy at the fantastic electrode, and an answer of sodium hydroxide also form.

(a) when a concentrated solution of sodium chloride (brine) is electrolyzed, it gets decomposed. this is a decomposition reaction. the products of this reaction are sodium hydroxide, chlorine, and hydrogen.

Learn more about Sodium Chloride at https://brainly.com/question/24878544

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Answer:

D. Both are used by radio stations to transmit sound

Explanation:

The main difference between both modulations is that in frequency modulation, the frequency of the carrier wave is modified as per the transmit data, while in amplitude modulation, the carrier wave is modified according to the data. because of this it can NOT be A, B, or C but it CAN be D

PLZ MARK AS BRAINLIEST :)

The amplitude modulation and frequency modulation techniques similar as , Both are used by radio stations to transmit sound.

So, option D is correct one.

learn about amplitude modulation

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Answer:

During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.

Explanation:

In cellular respiration,glucose and oxygen react to form ATP*. Water and Carbon dioxide are released as byproducts.The three stages of aerobic respiration are glycolysis , the krebs cycle , and oxidative phosphorylation.

ATP-Adenosine Triphosphite

the main energy currency of a cell

Answer:

4.58×10^3

3.72×10^7

Explanation:

3.8×10^2 =380

+ 4.2×10^3=4200

= 4580 = 4.58×10^3

Answer:

In the first law, an object will not change its motion unless a force acts on it

In the second law, the force on an object is equal to its mass times its acceleration

In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

Hope this helped :)

A is the reactant, B is the reaction process (or the name of the option that is hidden), C are the products, D is the coefficient, and E is the subscript.

Hope this helps. Please mark brainliest if you can!

Answer:

true

Explanation:

cause thereare both in liquid form

Answer:

physical

Explanation: water can change from solid to liquid to a gas

Answer:

If I have an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, ... If I contain 3.0 moles of gas in a container with a volume of 60. liters and at a ... Mixtures of helium and oxygen are used in scuba diving tanks to help prevent ... volume of 5.00 Lat 25.0C. Calculate the partial pressure of each gas and the ...

Explanation:

Answer:

NaNO3

Explanation:

NO3^-1 has a charge of minus 1.

Na^+1 has a charge of +1

When they combine, the charges are not noted. You get NaNO3

Sodium Nitrate

Answer:

lithium

Explanation:

this is because lithium has a valency of 1 and oxygen has a valency of 2 thereby exchanging valency to create Li²0

Answer:

B ) Known as the Age of Mammals

Explanation:

HOPE THIS HELPS

Answer:

B and C

Hope this helps!

Answer:

six

Explanation:

Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

Answer:

Six!

Explanation:

Valence electrons are the electrons in the outermost shell of an atom.

Answer:

b. a firework exploding

Explanation:

Answer:

OB

Explanation:

Water is necessary. Since during photosynthesis water reacts with carbon dioxide to form glucose and oxygen.

Calcium is a big NO!!.