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

Answers

Answer 1

it can be be be be be ebe be e e


Related Questions

Separate the following gene sequence into codons: TACGTCTTACGCTATGTC

Answer really quick plssss

Answers

Answer:

I think it's AUGCAGAAUGCGAUACAG

1. In which area are you most likely to find plants that can tolerate water that has a constantly
changing salt content?
A. a freshwater stream
B. an estuary
C. a a pond
D. a coral reef

Answers

Answer:

I would think B, an estuary. But I'm not sure.

Explanation:

The area where the plants should be find in which the water should be tolerated should be estuary.

What is an estuary?

An estuary refer to the enclosed body with respect to the brackish water  that have one or more rivers or streams that should be flow into it. Also, there should be free connection to the open sea. It should be considered as the transition zone that lies between the river environment and maritime environment

Therefore, we can conclude that the option b is correct.

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what describes a property of all elements

Answers

Properties of an element are sometimes classed as either chemical or physical. ... Some properties of an element can be observed only in a collection of atoms or molecules of the element. These properties include color, density, melting point, boiling point, and thermal and electrical conductivity.

I NEED HELP RN 40 POINTS

Answers

Answer:

B.) Adding a source of carbon dioxide to the water.

Explanation:

I had that question too.

can yall help me wit this?

Answers

Answer:

the color change

What are the atoms found at the bottom of the periodic table known as?

Answers

They are called lanthanoids!

What do you think causes a lunar eclipse? (Use your knowledge of solar eclipses and feel free to run the Gizmo to help you.)

Answers

Moon reflects the light frim the sun, thats why we are able to see it and it shines in the night. But, we know that Earth revolves around Sun and Moon revolves around Earth. During this revolution, Earth and Moon comes in a position when Earth is in the middle of the Moon and Sun. So, it blocks the light of Sun frim reaching Moon. Hence, we see no reflection and it causes Lunar eclipse.

Answer:

A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon. The sunlight passes through Earth's atmosphere, which causes Earth's atmosphere to filter out most of the blue light.

Explanation:

Please help me label this.​

Answers

protons would be ones with the +

Answer:

+ - protons

the green one- nutrons

black ones- electron

the rings are the energy level

The middle layer is the nucules

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

Answers

Answer:

No of protons = 15

Explanation:

Given that,

Atomic number = 15

Mass number = 31

We need to find the no of protons in the atom.

We know that,

No of protons = Atomic no of the atom

No of protons = 15

Hence, there are 15 protons in the atoms.

how many moles of oxygen molecules can be produced from 6 moles of lead oxide

Answers

Answer:

Moles of oxygen molecules produced = 3 mol

Explanation:

Given data:

Moles of oxygen molecules produced = ?

Number of moles of lead oxide decomposed = 6 mol

Solution:

Chemical equation:

2PbO₂          →        2PbO + O₂

Now we will compare the moles of oxygen and lead oxide.

                   PbO₂        :          O₂

                      2           :            1

                      6           :           1/2×6 =3 mol

three moles of oxygen molecules are produced.

what volume of water has a mass of 1 kg

Answers

Answer:

[tex]V=0.001\ m^3[/tex]

Explanation:

Mass, m = 1 kg

The density of water, d = 1000 kg/m³

We need to find the volume of water. The formula for the density of an object is equal to mass divided by volume. Its formula is :

d = m/V

V is the volume of water

[tex]V=\dfrac{m}{d}\\\\V=\dfrac{1\ kg}{1000\ kg/m^3}\\\\=0.001\ m^3[/tex]

So, the volume of water is [tex]0.001\ m^3[/tex].

Answer:

Volume of water has a mass of 1 kg  is explained below in details.

Explanation:

One liter of h2O has a volume of approximately specifically one kilogram when estimated at its maximum frequency, which happens at about 4 °C. It observes, therefore, that thousand of a liter, recognized as one milliliter (1 mL), of h2O has a volume of about 1 g; 1000 liters of h2O has a volume of about 1000 kg (1 tonne).

The main product of the photosynthesis reaction is
OA.
protein.
OB.
sugar.
Oc.
fat.
OD.
DNA.

Answers

Answer: Sugar

Explanation: Because after photosynthesis (Carbon dioxide, water, and sunlight) react, they make two products. Glucose (A sugar) and Oxygen.

which type of stress causes rocks to fold?


A.) compression
B.) shearing
C.) strike-slip-
D.) tension​

Answers

Answer:

A. compression

Explanation:

the rock is unable to move causing it to stress

Answer: a. Compression

1. Two substances, both solids, start at the same temperature. You transfer
the same amount of energy into both solids, but substance 1 becomes a
liquid before substance 2. Which substance has a stronger molecular
attraction?
A Substance 1
B Substance 2
Please help I will give you Brainlyest

Answers

Answer:

B substance 2

Explanation:

1. Two substances, both solids, start at the same temperature. You transfer

the same amount of energy into both solids, but substance 1 becomes a

liquid before substance 2. Which substance has a stronger molecular

attraction?

A Substance 1

B Substance 2

Please help I will give you Brainlyest

Substance 2 has a stronger molecular attraction.

What are solids?

Solid is one of the four fundamental states of matter. The molecules in a solid are closely packed together and contain the least amount of kinetic energy. A solid is characterized by structural rigidity and resistance to a force applied to the surface.

Both solids are supplied with an equal amount of energy. Out of both substances, substance 2 has a stronger molecular attraction due to which it can not easily change into a liquid while substance 1 has a lesser molecular attraction so supplying of few amounts of heat will change substance 1 into a liquid state.

Hence, Substance 2 has a stronger molecular attraction.

To learn more about solids, click here:

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Which of the following best describes the relationship between the speed of sound and the type of medium?

A.
Sound travels slower in air because of the large distance between air particles

B.
Sound travels slower in solids because of the small distance between solid particles

C.
Sound travels slower in air because of the small distance between air particles

D.
Sound travels slower in solids because of the large distance between solid particles

Answers

Answer:

A.  Sound travels slower in air because of the large distance between air particles

Explanation:

Sound is a mechanical wave that requires a medium for its propagation. Without a medium, sound cannot go through easily or readily. This implies that sound cannot be propagated through a vacuum.

A vacuum is an empty space without any particles in side. Sound waves travel fastest the most in solids because the particles are dense and close to one another. The speed of sound in air is the least because of the large distance between air particles. Therefore, the speed of sound is medium dependent

help me please i need help cuz its due today

Answers

A is the answer because neither has an advantage meaning the forces are equal

Answer:

I believe the answer is a. I hope this helps

Mu Cephei is no longer considered a main sequnce star. This means it has run out of:
A:hydrogen
B:Helium
C:Oxygen
D:Iron​

Answers

Answer:

A: Hydrogen

Explanation:

Plz give me brainliest it really helps!

A coffee cup calorimeter contains 153.21 g of water at 22.50 °C. A 65.454 g piece of iron is heated to 101.62 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 25.68 °C. The specific heat capacity of iron is 0.449 Jg·K and the specific heat capacity of water is 4.184 Jg·K. How much heat, , is lost by the piece of iron?

Answers

Answer:

Q = 2232J

Explanation:

In the system, the energy that is lost by the iron is:

Q = S*ΔT*m

Where Q is heat, S is specific heat of iron ΔT is change in temperature and m is mass of the piece of iron.

S = 0.449J/gK

ΔT = 101.62°C - 25.68°C = 75.94°C

m = 65.454g

Q = 0.449J/gK*75.94°C*65.454g

Q = 2232J

How many chlorine atoms are on the products side of the reaction 2 Li +
MgCl2 → 2 LiCl + Mg?*

Answers

Answer:

2 chlorine atoms on the product side.

Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?
PLEASE HELP ASAP
Thank you!!

Answers

Answer:

Yes. The two elements can combine to form different compounds.

Explanation:

Two elements can combine at different ratios.

Consider CO and CO₂. Both are made from carbon and oxygen. However, C and O combine at a 1:1 ratio in CO but at a 1:2 ratio in CO₂. CO is a fuel; it burns in the air. CO₂ does not burn in the air; it is used to put out fires and is found in extinguishers. CO and CO₂ are two distinct compounds.

There are many ways for the elements to combine with each other. As a result, the first twenty elements on the periodic table alone can produce a large number of compounds.

any help would be much appreciated, i'm being timed :( i'll mark brainliest and 5 star

Answers

Answer:

3 times ....

group 2

Explanation:

The bond between sodium and chlorine in the compound sodium chloride (NaCl) is a/an:

Answers

The classic case of ionic bonding, the sodium chloride molecule forms by the ionization of sodium and chlorine atoms and the attraction of the resulting ions. An atom of sodium has one 3s electron outside a closed shell, and it takes only 5.14 electron volts of energy to remove that electron.

help help help plsss

Answers

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

Is a tooth made out of matter or not matter?

Answers

Human teeth are made up of four different types of tissues.

Which of the following best represents and explains the formula for a compound made from fluorine and hydrogen?

A. HF, because both fluorine and hydrogen are capable of forming only one ionic bond.

B. HF, because both fluorine and hydrogen are capable of forming only one covalent bond.

C. H2F, because fluorine is short of two electrons, and hydrogen is short of one electron.

D. H2F, because fluorine is capable of forming one, and hydrogen is capable of forming two covalent bonds.

Thank you ​

Answers

The answer is B

HF, because both fluorine and hydrogen are capable of forming only one covalent bond.

The formula for a compound made from fluorine and hydrogen is HF, because both fluorine and hydrogen are capable of forming only one covalent bond. The correct option is option B.

What is chemical Compound?

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion. Covalent  bond is weaker than ionic bond.

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron.

The formula for a compound made from fluorine and hydrogen is HF, because both fluorine and hydrogen are capable of forming only one covalent bond.

Therefore, the correct option is option B.

To learn more about chemical compound, here:

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What is the amplitude ?

Answers

Answer: The amplitude is a measure of the strength or intensity of the wave

Explanation: when looking at a sound wave, the amplitude will measure the loudness of the sound.

To make a balanced equation, 6 H2O + 6 CO2 ---> C6H12O6 + _

Answers

Answer:

6O₂

General Formulas and Concepts:

Chemistry/Biology

Photosynthesis Equation: 6H₂O + 6CO₂ → C₆H₁₂O₆ + 6O₂

Explanation:

Most of the equation comes from the Photosynthesis Equation. Plants take in water and carbon dioxide and sunlight (energy) to produce glucose and oxygen. When we balance the equation and predict reaction. we should get   6O₂ as our answer.

When a chemical change occurs:

A) the law of conservation of mass is always obeyed
B) the chemical properties of new substances are different from the ones you started with
C) all of the options are true
D) atoms are rearranged

Answers

Answer:

Are composed together

Explanation:

Need help. Is this correct

Answers

Answer:

Yes, that is correct!

Explanation:

Answer:

Yes

Explanation:

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

How many molecules are in 4.5 moles of Ca(OH),?​

Answers

Answer:

We will use dimensional analysis to solve this.

We will need to know Avogadro's number, which is 6.02 × 10²³.

4.5 mol × [tex]\frac{6.02 * 10^{23} molecules}{1 mol}[/tex] = 2.71 × 10²⁴ molecules.

There are 2.71 × 10²⁴ molecules in 4.5 moles of Ca(OH).

61 molecules will be the answer most definitely :)
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