Explanation:
Density is an intensive property of any matter. Any given pure sample of a substance will have the same density value.
Density is the mass per unit volume of a compound;
Mathematically;
D = [tex]\frac{M}{V}[/tex]
where M is the mass
V is the volume
D is the density
For each element in the table below, use the Gizmo to find the number of valence electrons and the list the
valence based on the Lewis diagram. Then find the sum of these numbers.
IF SOMEONE COULD JUST HELP ME OR EXPLAIN HOW TO DO IT PLEASE! THANK YOU
Answer:
It's funny cause i'm doing the same exact thing as you.
Explanation:
You need to go to the Gizmo, and it explains everything. But When you're looking at "Valence Electrons" thats how many "dots" (electrons) there are on the outermost circle, so Fluorine has 7 Valence Electrons. To find the valency, you need to first identify the Valence Electrons. Fluorine has 7 valence electrons, and it would be a lot easier for this atom to gain an electron, rather than lose 7. So 8-7 is 1, meaning the Valency of Fluorine will be 1. For the sum, just add the total number, so 7+1 is 8, so the sum of Fluorine will be 8. This is confusing, so I'm sorry if this doesn't make sense.
Answer:
Explanation:
not sure if this is totally correct but checked with classmates and this seems to be around what most got
Match the term with the example that shows its definition [please].
Compressibility
Flammability
Heat of combustion
Toxicity
A) The burning of coal releases heat
B) Gasoline catches fire
C) Gas is squeezed into a small container
D) High lead levels in a lake kill fish
PLS HELP
True or False: Water molecules, as a liquid, are very spread apart because of their attractions for one another. *
Answer:
False
Explanation:
Water molecules are spread up but slightly, enough that none of the molecules actually move freely around each other. Only gas and plasma molecules are very spread apart.
Urgent help plzzzzzz?!!!!!!!!!!!
Answer:
Explanation:
For 4 all you have to do is take the -log(H3O+) and then use your PH values to identify if it's acidic or basic
a. 2.06 - acidic
b. 8.4 - basic
c. 6.67 - acidic
d. 5.85 - acidic
At which temperature and pressure would a sample of helium behave most like an ideal gas?
1
75 K and 500 kPa
2
150. Kand 500 kPa
3
300. Kand 50 kPa
4
600. K and 50 kPa
Submit Answer
Answer: 600K and 50kPa
Explanation:
600k as well as 50kPa since the pressure seems to be the lowest as well as the temperature is the greatest throughout this situation.
Under high temperatures and low pressures, actual gases behaved like ideal gases. such as the rule
[tex]PV=nRT[/tex]Even though at high temperatures, the kinetic energy of such gas particles surpasses the intermolecular attractive forces, — in other words this same potential energy of something like the molecules (gaseous).
Thus the above answer i.e., "option 4" is right.
Learn more:
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pls help me!!!!!!!
what are the elements found within the inner core of the earth??
im getting graded for this!! tyyyy
Answer:
Explanation:
iron
The digestive system is a group of organs working together to...
What is the mass, in grams, of 7.5 x 1015 molecules of ammonia, NH3?
Answer:
7.6125
Explanation:
multiply 7.5 with 1015
yll got 76125 divide it by 1000 to get answer in grams
The mass in grams of 7.5 × 10¹⁵ molecules of ammonia is 21.08 × 10⁻⁸ g.
How do we calculate mass from moles?Mass of any substance from moles will be calculatd as:
n = W/M , where
W = required mass
M = molar mass
We know that in 1 mole of any substance 6.022 × 10²³ particles of that sybstance are present.
No. of moles in 7.5 × 10¹⁵ = 7.5 × 10¹⁵molecules / 6.022 × 10²³ molecules per mole
No. of moles in 7.5 × 10¹⁵ = 1.24 × 10⁻⁸ moles
Molar mass of ammonia = 17 g/mol
Now we put the requred values on the first equation to get the mass as:
W = (1.24 × 10⁻⁸mol)(17 g/mol)
W = 21.08 × 10⁻⁸ g
Hence required mass of ammonia is 21.08 × 10⁻⁸ g.
To know more about moles, visit the below link:
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What is the ionic charge of elements in column 1?
Answer:
こんにちは
Explanation:
If the pressure on the surface of water in the liquid state is
40 kpa, the water will boil at?
Answer:
sdfs
Explanation:
dfsdfsdfs
2. Mrs. Matthews went to Edisto beach with her husband and two children. She forgot the
sunscreen and the UV Index was extremely high at a level 10. Her whole family got very sunburnt.
Which energy transfer caused the sunburn?
(20 Points)
Radiation
Conduction
O Convection
Kinetic Energy
Answer:
A; radiation
Explanation:
also, please dont use brainly to copy and paste every answer to get them right, use it when u need help
What is the name AND mass number of an atom with 4 protons and 4 neutrons?
John is performing an experiment in which a solution alternates between a clear color and a bluish-purple color at a regular time interval. He observes that the time interval between color changes is 30 seconds (s). Sally replicates the experiment with the same solution, but at a temperature that is 10 degrees Celsius (°C) higher. What is the most likely time interval between color changes at this higher temperature? *
Answer:
15 sec
Explanation:
The speed in which the moon orbits the earth is 500 mph.
a. True
b. False
Answer: False
Explanation: The moon travels at 1.42 mph around the Earth.
Answer:
false
Explanation:
Name 3 sources of carbohydrates for the production of an alcoholic drink
Answer:An alcoholic drink is a drink that contains ethanol, a type of alcohol produced by fermentation of grains, fruits, or other sources of sugar. The consumption of alcohol plays an important social role in many cultures. Most countries have laws regulating the production, sale, and consumption of alcoholic beverages.
Explanation: vodka the preferred alcoholic beverage of choice among alcoholics? #3 Doesn't make you feel bloated or full like beer does. It goes down quickly and smooth. #4 Gets you drunk just as fast as any other hard liquor can, and obviously much faster than beer or wine.
1. At what temperature dose water freeze
2. at what temperature dose ice melt
3. At what temperature dose water boil
Answer:
1. water will freeze at a temperature below 32 degrees fahrenheit 0 degree celsius.
2. Ice will melt at a temperature above 32 degrees fahrenheit 0 degrees celsius.
3. water boils at 212 degrees fahrenheit or 100 degrees celsius.
Why does a plant based diet provide fewer resources to produce
Answer: A plant-based diet requires less water to produce the food as it suppress all animal based products. In addition to consuming a lot of water to produce meat , livestock farming also pollutes water source because of the waste produced by the livestock ends up in waterways.
Explanation:
Answer:
I'm doing this so you can give smithpaige347 Brainliest
Explanation:
PLEASE HELP! THIS A TIMED QUIZ!!
Scientists found an artifact that has 25% of Carbon-14 left. Based on how much Carbon-14 is remaining, how old is the artifact that was found?
A). 17,100 years
B). 5,700 years
C). 22,800 years
D). 11,400 years
Answer: D
Explanation:
Devin had a bucket of shredded metals the metals consist of aluminum steel and copper he tried sorting the mixture by running it through a filter but this did not sort the mixture into separate components what can devin conclude
Answer:
Devin's problem can be solved by exploiting the activity series of metals.
Explanation:
This determines what metals are more reactive and would be readily displaced in a reaction.
Seeing as they are both metals scraps of similar sizes, filtration isn't a solution. But since Copper is lower on the activity series than Aluminium, adding an acidic solution (say tetraoxosulphate VI solution) to the mixture, would have aluminium in solution and Cu as residue which can then be filtered off.
I hope this was helpful.
400 liters of a certain gas is collected at STP. What will the volume be at 273 C and 190 torr pressure?
Answer:
2.00 L of a gas is collected at 25.0°C and 745.0 mmHg. What is the volume at STP? STP is a common abbreviation for "standard temperature and pressure." You have to recognize that five values are given in the problem and the sixth is an x. Also ... 273 1. A gas has a volume of 800.0 mL at minus 23.00 °C and 300.0 torr.
Explanation:
When energy is changed from one form to another, _____.
all of the energy is changed to a useful form
a physical change occurs
all of the energy can be accounted for
some of the energy is lost entirely
Answer:
some of the energy is lost entirely
Explanation:
Igneous rocks are classified by mineral composition and ?
1. How fast it weathers .
2. Sizes of the rock .
3. Texture .
4. Density.
Answer:
3. Texture.
Explanation:
Igneous rocks texture refers to the size of minerals in the rock, which is assessed by how visible they are to the naked eye.
Which electron notation is incorrect?
1s 2s 2p 3s 3p 10
1s 2s 2p 3s 3p3
1s2 282 2p 3s 3p6
GIVING BRAINLYY
Tracy is looking at the section of the periodic table shown below. Based on the positions of sodium (Na) and potassium (K) in the table, Tracy can predict that sodium what?
[tex]\huge\boxed{Option B}[/tex]
____________________________________PERIODIC TABLE:The periodic table, arranges the chemical elements ascording to their recurring properties. The number of each element corresponds to the number of protons in its nucleus.
-------------------------------------------------------------------------------------------Groups and PeriodsThere are 8 groups and 7 periods in the periodic table.
_________________________________________________________
Each element within a group has similar physical or chemical properties because of its atom's outermost electron shell. The outermost shell of every element in a specific group has same number of valence shell (most chemical properties are determined by the the outermost valence shell electron). The group number of an element represents the number of electrons in its outermost orbit. This shows that elements arranged in the same group have the same number of electrons in their outermost orbit.
_____________________________________Sodium and PotassiumSodium and Potassium belong to the same group i.e. GROUP 1 which is also called S BLOCK Group or IONIC GROUP. They have the similar properties,
__________________________________________________________
Properties of S block Elements
1- They are soft metals
2- possess low melting and boiling points
3- They have the largest atomic radii in their corresponding periods
4- are good conductors of heat and electricity.
5- They have low values of ionization energies and are hence highly electropositive.
_____________________________________Best Regards,'Borz'A 5.0-mL sample of CO2 gas is enclosed in a gas-tight
syringe (Figure 11.3) at 22 °C. If the syringe is
immersed in an ice bath (0 °C), what is the new gas
volume, assuming that the pressure is held constant?
Answer:
3.5ML
Explanation:
At the constant pressure, the final volume of the carbon dioxide gas was equal to 4.62 ml at a temperature of 0ºC.
What is Charles's law for volume-temperature relation?Charles's law can be explained as when the pressure of the gas is kept constant, the volume of gas is directly proportional to the temperature of a gas.
The volume of the gas and the temperature of the gas have a direct relationship according to this law.
Therefore, V∝ T
or V₁/T₁ = V₂/T₂ ....................(1)
Given, the initial temperature of the CO₂ gas, T₁ = 22 ºC
T₁ = 22 + 273 = 295 K
The final temperature of the CO₂ gas, T₂ = 0ºC
T₂ = 0 + 273 = 273 K
The initial volume of the gas, V₁ = 5 ml
Substitute the value of V₁, T₁, and T₂ in equation (1 ) to get final volume of CO₂ gas:
5/295 = V₂/273
V₂ = 4.6 ml
Therefore, the final volume of the gas is equal to 4.6 ml at 0 ºC, when there is no change in the pressure.
Learn more about Charles's law, here:
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#SPJ2
oxygen - 17
Atomic #
Atomic mass
# of protons
# of neutrons
# of electrons
Answer:
atomic #8
atomic mass 15.999U
# protons 8
# neutrons 8
# protons 8
Which term means finding ways to describe and explain the natural world
through observations and experiments?
A. Pseudoscience
B. Philosophy
C. Chemistry
D. Science
Answer:
D. Science i think
Explanation:
You observe 2 waves named alpha and beta. The alpha wave has a frequency of 5 Hz and the beta wave has a frequency of 2 Hz. Based on these observations which wave has a shorter wavelength? Group of answer choices
Answer:
shorter wavelength = alpha wave
Explanation:
Given that,
The alpha wave has a frequency of 5 Hz and the beta wave has a frequency of 2 Hz.
We need to compare the wavelengths of these two waves.
For alpha wave,
[tex]\lambda_1=\dfrac{c}{f_1}\\\\\lambda_1=\dfrac{3\times 10^8}{5}\\\\=6\times 10^7\ m[/tex]
For beta wave,
[tex]\lambda_2=\dfrac{c}{f_2}\\\\\lambda_2=\dfrac{3\times 10^8}{2}\\\\=15\times 10^7\ m[/tex]
From the above calculations, we find that the wavelength of the alpha wave is shorter than the wavelength of the beta wave.
HELP 20 points!
In a manufacturing process why would you prefer not to have a limiting reactant?
Answer:
The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops. ... The limiting reagent is the one that is totally consumed; it limits the reaction from continuing because there is none left to react with the in-excess reactant.
Explanation:
The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops. ... The limiting reagent is the one that is totally consumed; it limits the reaction from continuing because there is none left to react with the in-excess reactant.
PLEASE HELPPP :[
When a chemical change occurs a new substance is created. Harvey put hamburgers on his barbecue, and they cooked. He left fruit out on the counter and they started to rot.
What evidence about chemical changes can Harvey use to support the examples in his experiment?
A.The chemical changes occurred because the chemicals changed.
B. The chemical changes occurred because there was a change in light energy.
C. The fruit and the hamburgers were affected by an increase in heat energy.
D. The fruit and the hamburgers were affected by a decrease in heat energy.
Answer:
C. The fruit and the hamburgers were affected by an increase in heat energy.
Explanation:
One claim Harvey can use to support the examples from his experiment is that the hamburgers and fruits were affected by an increase in the heat energy.
This chemical change is one that is solely driven. This action Harvey is carrying out is cookingWhen meals are cooked, the raw substances undergoes chemical change via the action of heat.Answer:
btw it's not c
Explanation:
a fruit rotting or infected is a chemical reaction therefore,its close to d