Planets form from particles in a disk of gas and dust, colliding and sticking together as they orbit the star. The planets nearest to the star tend to be rockier because the star's wind blows away their gases and because they are made of heavier materials attracted by the star's gravity.
Balance equations practice
Answer:
1 - B) 2 - B) 3 - A)
Explanation:
1. C3H8 + 5O2 → 3CO2 + xH2O.. Find 'X'.
A) 3
B) 4
C) 5
D) 6
2. 4Al + 3O2 → xAl2O3. Find 'X'
A) 3
B) 2
C) 4
D) 5
3. FeCl3 + 3NaOH → Fe(OH)3 + xNACl. Find 'x'
A)3
B) 4
C)5
D)6
More in Next Question...
DO the following conversion
Answer:
Kim Sam Mi Da!!
Explanation:
Da Mi Sam Kim!!
Will give BRAINLY if right
Which response is specific to the presence of pathogens in the body?
inflammation
vaccination
production of antibodies
production of viruses
Answer:
production of antibodies
Answer:
C
Explanation:
The body will start to make antibodies to rid of the "invasion".
So the answer is C
is a paper clip homogeneous or heterogenous? substance or mixture? solution, colloid, suspension?
Explanation: It is an alloy, very probable, not homogeneous.
A metal paper clip is usually steel, an alloy of iron, carbon, and other elements in various amounts. A plastic paper clip is composed of a polymer, a very complex compound.
A paper clip is a Colloid
i guess this helped you pls mark me as brainliest
2. In what state are particles spread farthest apart?
A)solid
B)liquid
C)gas
3. How does thermal energy explain your answer to #2?
Answer:
In what state are particles spread farthest apart? Answer= Gas
How does thermal energy explain your answer to #2?
When something is hot and/or warm its moving fast like the steam u see on a cup of tea , it travels faster than any other state of matter.
Explanation:
hope i helped
¿De que dependen las propiedades del grafeno?
¿De que ha dependido el rapido avance en el desarollo de nuevos materiales basados en formas alotropicas del carbon?
POR FAVOOR ES URGENTEEEEE
Answer:
di ko maintindihan anggulo ng isinulat
The aqueous fluid outside of a cell is known as
fluid.
O interstitial
O intracellular
O semipermeable
O desmotic
the following reaction gives a product with the molecular formula c4h8o2. draw the structure of the product.
The following reaction gives a product with the molecular formula C₄H₈O₂. The diagram of the structure of the product can be seen in the image attached below.
The reaction between C₂H₂(ONa)₂ and C₂H₄Br results in the formation of the product C₄H₈O₂ and 2NaBr.
This reaction undergoes an SN₂ mechanism since there is no stable carbocation formed. In the reaction -O⁻Na⁺ attacks the ortho position in C₂H₄Br to form C₄H₈O₂.
In SN₂ mechanism is a nucleophilic substitution reaction where one bond is formed while another one is broken simultaneously.
The mechanism for the reaction can be seen in the image attached below.
Learn more about nucleophilic substitution reaction here:
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Someone pls help me I will make you brain
Answer:
i think it's freezing of permafrost. so sorry if it's wrong lol
Which of the substances shown below most likely exhibit hydrogen bonding with other identical
molecules? Check all that apply.
H
Н
Н.
Н
Н
H
H
но
N-C-C
Hн 0-Н
Н
Н
H
Н
H
DONE
Intro
TE
Answer:
b and c
Explanation:
did it on edge
a gas is at 35.0°c and 3.50 l. what is the temperature at 7.00 l?
Answer:
363C
Explanation:
V = KT and T = V/K
3.5=k(35+273) = 308k
k=3.5/308 =0.011
new T=7.0/0.011=636K = 636-273 =363C
Facts about radiation in the human body
Answer:
How Radiation Affects Your Body. Radiation can damage the DNA in our cells. High doses of radiation can cause Acute Radiation Syndrome (ARS) or Cutaneous Radiation Injuries (CRI). High doses of radiation could also lead to cancer later in life.
Because radiation kills rapidly dividing cells (which is why we use it to treat fast-growing cancer cells), radiation exposure most increases the risk of cancers of rapidly dividing cells — leading to leukemia, lymphoma, breast cancer, bladder cancer, colon cancer, liver cancer, lung cancer, esophageal cancer, ovarian
Explanation:
Nung 20 g CaCO3 và hấp thụ hoàn toàn khí CO2 sinh ra vào 0,5 lit dung dịch NaOH 0,56 M .Tính nồng độ mol của muối thu được
Answer:
nCaCO3 = 20/100 = 0,2 mol
CaCO3 --> CaO + CO2
0,2 ----------------> 0,2
nNaOH = 0,5.0,56 = 0,28 mol
=> T = nNaOH/nCO2 = 0,28/0,2 = 1,4
=> sản phẩm tạo ra bao gồm : Na2CO3 và NaHCO3
NaOH + CO2 --> NaHCO3
x -------> x --------> x
2NaOH + CO2 --> Na2CO3 + H2O
y ---------> 1/2y ---> 1/2y
ta có : nCO2 = nMuối = 0,2 mol
=> CmMuối = 0,2/0,5 = 0,4 M
What percentage of the Earth can a satellite reach at any given time? 100% 60% 40% 25%
Answer:
The answer should be 60%.
Answer:
40% is correct
Explanation:
Which factor of production would water be considered?
A) Land
B)Labor
C) capital
D)entrepreneurship
Explanation:
land.
I think it is the answer
Answer:
land .......................
what is the condensed electron configuration for nitrogen
Answer:
In writing the electron configuration for nitrogen the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for N goes in the 2s orbital. The remaining three electrons will go in the 2p orbital. Therefore the N electron configuration will be 1s22s22p3.
Explanation:
hope you get it right:)
Answer:
the electron configuration for N will be 1s^2 2s^2 2p^3
on an energy diagram, where is a stable equilibrium point?
Answer:
1.2
Explanation:
which compound would have the lowest melting point?
1- Calcium Hydroxide + Calcium Bicarbonate
2- Calcium Bicarbonate + Sodium Carbonate
3- Calcium Sulphate + Sodium Carbonate
4- Sodium compound + Calcium Sulphate
5- Carbon dioxide + Calcium Carbonate
6- Calcium Bicarbonate + Calcium Carbonate
Remember these followings :-
Acid + Base = salt + water
Acid + metal = salt + hydrogen
Acid + carbonates = salt + water + carbon dioxide
Base + ammonium salt = salt + ammonia + water
Base + acidic oxide = salt + water
I hope that you will be clear via these formulas.
Please help, I'll give brainiest
Coffee is a solution containing caffeine, acids, alkaloids, water, phenols, and many other chemicals. The solvent in the coffee solution is (1) __________ and the rest of the chemicals dissolved in the solvent are called (2)_________.
3. What is the difference between a saturated solution and a supersaturated solution?
4. Is the following molecule, polar or nonpolar?
5. 12 eggs can be referred to as one dozen eggs.
______________ particles can be referred to as one mole of particles.
6.
The pH of a strong acid might be _____ while the pH of a strong base might be _____
The pH of pure water is _____.
7. What would be the pH of .002 moles of HNO3 dissolved in 2 L of water?
8. A base has a pH of 8.5. What is the concentration of OH- ions in the solution?
Solutes dissolve in solvents to form a solution. A saturated solution contains just as must solute as it can normally hold.
The solvent in the coffee solution is water and the rest of the chemicals dissolved in the solvent are called solutes. A solution is formed when a solute is dissolved in a solvent.
A saturated solution contains just as much solute as it can normally hold at a particular temperature while a supersaturated solution contains more solute than it can normally hold at a particular temperature.
A polar molecule contains covalent bonds between atoms having an electronegativity difference above 0.5. Such molecules are polar as electrons of the bond are drawn closer to the atom that is more electronegative.
According to Avogadro's law; 6.02 × 10^23 particles is referred to as one mole of particles.
A strong acid has a pH that may range from 0 - 3. A strong base has a pH of around 10 - 14. Water is a neutral substance and has a pH of 7.
From the information provided;
Number of moles of acid = 0.002 moles
Volume of solution= 2 L
Concentration of solution = number of moles/volume = 0.002 moles/2L = 0.001 M
pH = - log[H^+]
pH = - log[0.001 ]
pH = 3
From;
pH + pOH = 14
pOH = 14 - pH
pOH = 14 - 8.5
pOH = 5.5
pOH = - log[OH^-]
[OH^-] = Antilog[-5.5]
[OH^-] = 3.2 × 10^-6 M
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Someone pls help me I will make you brain
Answer:
its c I truly believe that it is c
Explanation:
ANSWER THIS WORKSHEET ALSO I WILL GIVE BRAINIEST
If the statement is true, write true. If the statement is false, change the underlined word
or words to make the statement true.
1. An element’s mass number tells the number of protons in its
nucleus.
2. Negatively charged particles in an atom are called electrons.
3. The cloud model of the atom describes the location of
electrons as specific orbits around the nucleus.
4. Atoms with the same number of protons but different numbers
of neutrons are called isomers.
5. The sum of the protons and neutrons in an atom is called the
atomic number.
6. An object that helps explain ideas about the natural world is
called a model.
Fill in the blank to complete each statement.
7. The positively charged particle of an atom is called a(n) .
8. A particle with no charge is a(n) .
9. A(n) is the particle of an atom that moves rapidly in the
cloudlike region around the nucleus.
10. The tells the number of protons in the
nucleus of every atom of an element.
11. Atoms of the same element that have the same number of protons but different
numbers of neutrons are called .
12. The sum of protons and neutrons in the nucleus of an atom is the
.
Write the letter of the correct answer on the line at the left.
13. The positively charged particle in an atom’s nucleus is the
A electron
B neutron
C proton
D isotope
14. The smallest particle an element can be divided into is the
A electron
B neutron
C isotope
D atom
15. An element’s identity can be determined from its
A atomic number
B number of neutrons
C number of isotopes
D energy levels
16. The model of the atom that described electrons scattered throughout a ball of positive charge was proposed by
A Niels Bohr
B Ernest Rutherford
C J. J. Thomson
D John Dalton
Answer:
5. An element's mass number tells the number of protons in its nucleus.
Atomic
6. Negatively charged particles in an atom are called electrons.
True
7. The cloud model of the atom describes the location of electrons as specific orbits around the nucleus.
Bohr
8. Atoms with the same number of protons but different numbers of neutrons are called isomers.
Isotopes
9. The sum of the protons and neutrons in an atom is called the atomic number.
Mass
10. An object that helps explain ideas about the natural world is called a model.
True
11. Mendeleev arranged his periodic table in order of increasing atomic number.
Mass
12. The rows in the periodic table are called periods.
True
13. Moving across the periodic table from left to right, one finds, in order, metals, then gases, then nonmetals.
Metalloids
14. Another name for a period is a family.
Group
15. On the periodic table, elements in the same column have similar properties.
True
Explanation:
Why are microwaves idea for transmitting satellite communication signals?
Answer:
Microwaves are best suited because
they have a higher frequency and small wavelength
Satellite communication and Earth observation from space benefit from microwaves that can pass through haze, light rain, snow, clouds, and smoke. Because they can penetrate the atmosphere, microwaves are used. Small wavelength and high frequency is employed for this.
Microwaves are radio waves with short wavelengths and frequencies in the gigahertz (GHz) range. They can send signals over great distances without any data loss thanks to their high frequency. Without producing signal overlap or interference, they may carry a wide range of frequencies.
Electromagnetic radiations include radio waves and microwaves. In communication, both are utilized. Television and radio programs are transmitted by radio waves, but mobile phones and Wi-Fi use microwaves. Radio waves are one of the several alternatives for satellite communication.
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Discussion Question: Your classmate said,
"I think Gold is a pure substance that can't be broken down any further
Do you agree or disagree with this statement. Explain your reasoning using clues from the statement and the periodic
table.
Answer:
yes gold is pure
Explanation:
what color change is anticipated over the course of the reaction?
Answer:
can't help you sorry bye
in order for a circuit work there can be no _______ within the circuit?
Mg + 2HCl ---> MgCl2 + H2
How many grams of MgCl2 would result from a reaction involving 24.31 g of Mg?
assumed that all of the initial Mg had reacted, therefore the total amount of Mg had transferred into Mg2+ in MgCl2
Molar mass for Mg is 24.31 g/mole and MgCl2 is 95.21 g/mole
--> nMgCl2= nMg = 24.31 g ÷ 24.31 g/mole = 1 mole
--> so the mass of MgCl2 = 1 mole × 95.21 g/mole = 95.21 g
how many molecules of butane are contained in 25.0 ml of butane? the density of butane is 0.6011 g/ml and the molar mass is 58.12 g/mol.
Explanation:
To determine the molecules of butane we can either use multiple steps or use a combined equation based on the following formulas:
Molecules of butane = Moles × Avogadro's Number
Moles of Butane = Mass ÷ Molar Mass
Mass of Butane = volume × Density
∴ Molecules of butane
= [(volume × Density) ÷ Molar Mass] × Avogadro's Number
= ([(25.0 ml × 0.6011 g/ml) ÷ 58.12 g/mol] × (6.022 × 10²³ molecules/mol))
= 1.557 × 10²³ molecules
∴ 25.0 ml of butane of density of 0.6011 g/ml contains 1.557 × 10²³ molecules.determine the velocity of a 55-kg skier whose kinetic energy is 8900 J
Answer:
Kinetic energy = 1/2mv^2
8900 j =1/2*55*v^2
v^2=8900*2/55
v^2=323.6
v=17.98
Explanation:
24. Predict the ions that form when magnesium(group IIA) and nitrogen (group VA) react::
Magnesium (group IIA) loses two electrons to become a cation. This is the most energetically favorable way for Magnesium to obtain a valence electron that is stable (octet). When an atom loses electrons it has a positive charge that matches the number of electrons lost.
Nitrogen (group VA) gains three electrons to become an anion. This is the most energetically favorable way for Nitrogen to obtain a valence electron that is stable (octet). When an atom gains electrons it has a negative charge that matches the number of electrons gained.