Answer:
si estoy de acuerdo cien por ciento
Which diagram or diagrams represent a compound?
Answer:
x and z cuz compound are group of molecules or atoms
What is the molarity of 930 mL of LiCl solution that contains 139.9 g of LiCl?
O A. 3.5 mol/L
O B. 150 mol/L
hipotle and like
O C. 3.3 mol/L
O D. 3.5 x 10-3 mol/L
Answer:
3.5 mol/L
Explanation:
First convert the 139.9g of LiCl into moles of LiCl. Don't do the sig fig rule until the very end.
Second, take 930mL of LiCl and divide it by 1000 to convert it to liters.
Third use the molarity formula which is M=mol/L and divide 0.930L by 3.300773877mol and you will get 3.549219223. This is where the sig fig rule will come into play. 3.5mol/L is a reasonable answer for this problem.
In the chemical formula for ammonia, NH3 , what does the subscript 3 represent?
the number of ammonia molecules that will bond together
the number of nitrogen atoms in each molecule of ammonia
the number of hydrogen atoms in each molecule of ammonia
the number of nitrogen and hydrogen atoms in each molecule of ammonia
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option C.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
In the given molecule NH₃, the subscript 3 that is written on the foot of element represents the number of hydrogen atoms in each molecule of ammonia.
Therefore, the correct option is option C.
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What is the formula for Iron (3) Oxide?
Answer:
IT should be Fe2O3
Explanation:
Fe2O3
Answer:
Iron (III) Oxide = Fe2O3
The arrangement of particles is most ordered in a sample of
1.
NaCl(aq)
2.
NaCl(l)
3.
NaCl(g)
4.
NaCl(s)
PLEASE HELP
We have that the arrangement of particles of NaCl is most ordered in a sample of
NaCl(s)
i.e solid NaCl
From the question we are told
The arrangement of particles is most ordered in a sample of
1. NaCl(aq)
2. NaCl(l)
3. NaCl(g)
4. NaCl(s)
NaCl Generally known as sodium chloride or salt exist in four main states as shown
1. NaCl(aq)
2. NaCl(l)
3. NaCl(g)
4. NaCl(s)
Mow in a subject of its arrangement of particles we can see that as its state changes from gaseous through to solid it gains in form and arrangement of particles
Therefore
The arrangement of particles of NaCl is most ordered in a sample of
NaCl(s)
i.e solid NaCl
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What does the atoms of metals have
Answer:
I dont know
Explanation:
because I dont know
what is the change in atomic mass when an atom emits a beta particle
Answer:
A neutron in the nucleus converts to a proton and a beta particle. The nucleus ejects the beta particle and some gamma radiation. The new atom retains the same mass number, but the number of protons increases to 44.
Explanation:
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When you are drying your hands underneath a hand dryer, this is an example ofA. RadiationB. ConductionC. ConvectionD. Convection
Answer: Convection
Explanation: Convection is the transfer of heat so the heat would be transferred to your hands leaving them dry.
How did gravity and density affect the order in which these spheres ended up on earth
Answer:
The atmosphere and Earth's interior are layered by density. The differentiation between these layers is due to processes that took place during the early stages of Earth's formation (ca. 4.5 billion years ago). At this time, melting would have caused denser substances to sink toward the center while less-dense materials would have migrated to the crust.
Gravity pulls more strongly on denser materials so denser materials are at the center of things.
Explanation:
Gravity pulls more strongly on denser materials so denser materials are at the center of things. The lowest layer of the atmosphere is denser than the upper layer. Earth's liquid metal core has convection, which generates the magnetic field.
Denser materials are in the centre of the universe because they are more powerfully pulled toward the centre by gravity.
What is gravity?The force that pulls items toward the centre of a planet or other entity is called gravity. All of the planets are kept in orbit around the sun by gravity.
Gravity applies to anything that has mass. Gravity is stronger for objects with higher mass. Along with distance, gravity weakens as well. Therefore, the gravitational force of two things becomes stronger the closer they are to one another.
The mass of the Earth is what creates gravity. The total gravitational force of all of its mass acts on the weight in your body. What gives you weight is that. Additionally, you would weigh less than you do now if you were on a planet with a lower mass than Earth.
Gravity applies to anything that has mass. Gravity is stronger for objects with higher mass. Along with distance, gravity weakens as well. Therefore, the gravitational force of two things becomes stronger the closer they are to one another.
Therefore, denser materials are closer to the centre of the universe because gravity is more drawn to them.
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the melting point of a substance is also the same as the:
Answer:
The melting point of a solid is the same as the freezing point of the liquid. At that temperature, the solid and liquid states of the substance are in equilibrium.
Pure gold: 1063
Pure silver: 961
Identify the independent and the dependent variables of this statement: Do tomatoes
have a faster growth rate under fluorescent, incandescent, or natural light?
Answer:The dependent variable is the rate of germination and growth. The independent variable is the variety of tomato.
Explanation:i hope this helps you
answer false or true for each question, (1-5). thanks!
la masa molecular de la cafeina es de 194,19g ¿cual es la formula molecular de la cafeina ?
Answer:
the formula for the molecular caffeine is C8H10N4O2
Explanation:
percent to mass, mass to mole, divide by small multiply till whole
Dãy các chất tác dụng được với dung dịch HCl loãng tạo thành sản phẩm có chất khí
A.BảO,FE,CaCO3 B.Al,MgO,KOH
C.Na2SO3,CaCO3,Zn D.Zn,Fe2O3,Na2So3
If the atomic number is bigger then is the nuclear charge also bigger
Answer:
No
Explanation:
When atomic number is increasing its atomic mass increases
Atomic number doesn't affect nuclear charge
what if water didnt have a negative charge?
Explanation:
The water molecule has a tiny negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms due to the unequal sharing of electrons.
Help please 20 points and brainliest
Answer:
For homogeneous:
Filteration, vaporization, and a reverse chemical reaction
Explanation:
1) precipitation/crystallization reactions - if one of the components can form a solid salt when the solution undergoes several factors (concentration change, temperature change, etc); separation can be done either by filtration, centrifugation, or simple decantation.
(2) chromatography - separation can be based on the mobility of the phases (liquid chromatography, gas chromatography, ion-exchange, etc.)
(3) solvent extraction - if the components are both liquid, separation based on their relative solubilities
(4) distillation - separation based on different boiling points.
(5) magnetic separation - if one of the components have magnetic properties.
(6) electrophoresis - separation of organic molecules based on the type of gel used
heterogeneous:
Main methods of separation of heterogeneous mixtures
- Magnetic separation
- Sublimation
- Decantation
Liquid-solid mixture
Liquid-liquid mixture
- Filtration
- Centrifugation
Themes of interest
*20 points* Pls answer following the rules of :No files
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No inappropiate responce
clean comments
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Pls help i'll mark you the brainlest What force is needed to make ball fall on Earth if it has a mass of 13kg
Answer:
gravity.
Explanation:
Use the equation to answer the question.
CH4 + _____Cl2 → CCl4 + _____HCl
Which numbers balance this equation?
The whole Balanced Reactions Quick Check for Honors Chemistry A is
1) A. The reactants and products have the same number and type of atoms, but the atoms may be recombined.
2) B. It shows how many molecules there are of a particular substance.
3) D. NaOH + HCl → NaCl + H2O
4) A. Atoms always remain intact during chemical reactions.
5) D. 4, 4
The balanced chemical equation is:
CH₄ + 4Cl₂ —> CCl₄ + 4HCl
The numbers that balanced the equation are: 4, 4
To know the number that balanced the equation, we shall simply balance the equation.
CH₄ + Cl₂ —> CCl₄ + HCl
There are 4 atoms of H on the left side and 1 atom on the right side. It can be balance by writing 4 before HCl as shown below:
CH₄ + Cl₂ —> CCl₄ + 4HCl
There are 2 atoms of Cl on the left side and a total of 8 atoms on the right side. It can be balance by writing 4 before Cl₂ as shown below:
CH₄ + 4Cl₂ —> CCl₄ + 4HCl
Now, the equation is balanced
The numbers that balanced the equation are 4,4
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I will make you brainless answer this 1 Question !
Direction: Answer the missing word
Answer: This means that the color of light with a higher frequency will have a lower wavelength and valence electron energy level.
Explanation:
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List these drinks in order of kinetic energy, starting with the drink whose particles have the highest kinetic energy.
hot chocolate, water, juice, milk
hot chocolate, juice, milk, water
water, milk, juice, hot chocolate
water, hot chocolate, juice, milk
Water
Milk
Juice
Hot choclate
Answer: The answer is B). Hot Chocolate, Juice, Milk, Water.
Explanation: For the second row, I put the temperature (in °C) in the descending order that looks like this: 50°C, 40°C, 35°C, 15°C.
I hope that my answer is very helpful to your own question about listing these drinks in descending order by starting with the drink whose particles have the highest kinetic energy, please mark me as Brainliest and have a great P.A. Day and weekend! :D
Sincerely,
Jason Ta,
The ambitious of Brainly and the role of The TDSB and WHCI Student of the high school.
is this statement true or false? the chinese knew how to produce silk by about 2700 b.c.
Answer:
its true
Explanation:
I took the test
when a solution is diluted, what happens to the number of moles of solute in the diluted solution.
Answer: The amount does not change.
Explanation:
what two functional groups are found in monosaccharides
Can I have help with this I have no idea, is this a trick question?
Answer:
yes
Explanation:yes
Limestral flour (calcium carbonate) is a weak base used for at a few years of intervals Neutralize the acidification that takes place by lakes and woodland. Would not be a good idea that instend Using the stronger base sodium hydroxide and then be able to use a little less amount?
Answer:
Well, no.
Explanation:
NaOH is a base which is found in soap, and other detergents which gives it the slippery feel, because, it is a really strong base. Applying this to lakes and woodland could make the water and woodland really concentrated which could make them harmful for domestic and industrial use
why should you never place a hot object on the pan of a balance
Answer:
Because, it would make the pan hot and if it's plastic then it would melt. if it was metal it might make the metal piece hot and you'd risk burning yourself.
Explanation:
You should never place a hot object on the pan of a balance because it can cause the balance to become inaccurate and affect the measurement results.
Balances are precision instruments used to measure the mass of objects with high accuracy. The balance pan and its components are designed to operate under specific conditions, including a stable temperature. When you place a hot object on the balance pan, several issues can arise:
Thermal Expansion: Materials, including metals and plastics, can expand when exposed to heat. Placing a hot object on the pan can cause the pan and its supporting components to expand, potentially affecting the balance's calibration and accuracy.
Uneven Heating: If the hot object is not uniformly heated, it can cause uneven expansion of the balance pan. This can lead to imbalanced weight distribution and inaccurate measurements.
Calibration Shift: The heat from the hot object can cause the materials in the balance to change temperature rapidly, potentially affecting the calibration of the instrument. The balance may require time to stabilize before accurate measurements can be obtained.
Damage to the Balance: Exposing the balance pan to extreme heat can cause warping, cracking, or other structural damage to the pan material. This can permanently impair the balance's performance and accuracy.
To ensure accurate measurements and maintain the integrity of the balance, it's important to allow hot objects to cool to room temperature before placing them on the balance pan. Additionally, using appropriate containers or holders designed for high-temperature applications can help prevent damage to both the hot object and the balance equipment.
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Differentiate liquid crystals from pure liquids and crystalline solids.
(Answer this question correctly and I will give the first correct answer brainliest)
Answer:
the difference between pure liquids and crystallines solids is pure liquids have optically active molecules forming twisted shapes whereas solids do not
Explanation:
. The best way to separate sodium chloride solution and sand is by:
Answer:
Dissolving the mixture in water, filtering and then perform evaporation on the filtrate