Answer:
Because many objects are not regularly shaped their volume cannot be determined using a volume formula. The volume of these objects can be found by water displacement. A volume of water sufficient to cover the object is placed in a graduated cylinder and the volume read. The object is added to the cylinder and the volume read again. The difference between the two volumes is the volume of the object. This method is demonstrated using the same battery used above.
Explanation:
Which of the above molecules? how did you know?
1. Sodium Nitrate
2. Carbonic Acid
3. Methane
4. Ammonia
5. Table salt
6. Carbon Dioxide
7. Atmospheric oxygen
8. Hydrochloric Acid
9. Hydrogen peroxide
Answer:
I know Sodium Nitrate,Methane,Carbon Dioxide,Atmospheric Oxygen and Hydrochloric Acid
Three facts about Dalton’s Model of the Atom:
Explanation:
Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. The atoms of different elements vary in size and mass. Compounds are produced through different whole-number combinations of atoms.
hope this helps you
have a nice day:)
When jayden applies the hydrogen peroxide to Chloes dark hair, the melanin pigments in her hair will be
Answer: her hair will be oxidized
Explanation: they hydrogen peroxide works as an oxidizing agent, releasing oxygen into the melanin pigment in the hair.
Select all types of muscles.
Skeletal
ℍ
Cardiac
Stretch
Smooth
Answer:
Skeletal
Cardiac
Smooth
Explanation:
The body contains three types of muscle tissue: skeletal muscle, cardiac muscle, and smooth muscl
32. Explain why carbon shows versatile nature why it forms so many organic compounds.
Answer:
Carbon is a versatile element and is found in many different chemical compounds, including those found in space. Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings when connected to other carbon atoms.
Explanation:
meaning of versatile: capable of or adapted for many different uses, skills, etc. 2 variable or changeable.
The versatile nature of carbon can be best understood with its features such as, tetravalency and catenation. In this section let us learn more about versatility of carbon.
Carbon is a versatile element and is found in many different chemical compounds, including those found in space. Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings when connected to other carbon atoms.
The two characteristic features seen in carbon, that is, tetravalency and catenation, put together give rise to a large number of compounds. Many have the same non-carbon atom or group of atoms attached to different carbon chains.
Catenation: The property of forming long chains by self-linking with other carbon atoms to form long chains, rings, double or triple bonds is called catenation.
Isomerism: Compounds with same molecular formula but different structural formula are called isomers. An isomerism commonly seen is due to difference in the arrangement of atoms or groups of atoms & is called structural isomerism. The 4 types of structural isomerism are:
Chain isomerism
Position
Functional
Metamerism
Tetravalency: Carbon has 4 electrons in its valence shell. Energy considerations do not allow it to gain or lose 4 electrons; therefore it forms covalent bonds with other elements to complete its octet. This accounts for its tetravalency and explains its ability to form a variety of compounds.
Michell saw a model of a skeleton in a science store. She counted the bones in the skeleton. There were 206. Which is NOT something the 206 bones in our skeletons do?
A. support the body
B. help the body move.
C. regulate temperature.
D. protect internal organ
Help me!!!
Answer:
C, regulate temperature
Explanation:
Bones take no part in temperature regulation throughout the body.
A gas occupies 850.0 mL at a temperature of 37.0 °C. What is the volume at 132.0 °C?
plz help will give brainliest
Answer:
1,110.48 mL
Explanation:
37°C is 310K and 132°C is 405K
V/V' = T/T'
850/V' = 310/405
V' = (850×405)/310
=> V' = 1110.48 mL
help this is an earthquake thing
Answer:
im pretty sure its a push or pull thing
Explanation:
Tensional stress is the stress that tends to pull something apart. It is the stress component perpendicular to a given surface, such as a fault plane, that results from forces applied perpendicular to the surface or from remote forces transmitted through the surrounding rock.
This image shows the rock cycle.
Which event most likely occurs at point V?
cooling
erosion
heating
melting
Answer:
it is Thy First option
Explanation:
Name the first 20 elements on the periodic table
Answer:
HYDROGENHELIUMLITHIUMBERYLLIUMBORON CARBONNITROGENOXYGENFLUORINENEON SODIUMMAGNESIUMALUMINUMSILICONEPHOSPHORUSSULFURCHLORINEARGONPOTASSIUMCALCIUMFor the reaction 1Pb(NO3)2 + 2KI −−> 1PbI2 + 2KNO3, how many moles of lead iodide (PbI2) are produced from 300.00 g of potassium iodide (KI)?
Answer:
moles PbI₂ produced = = 0.9 mole (1 sig. fig.)
Explanation:
Given Pb(NO₃)₂ + 2KI −−> PbI₂ + 2KNO₃
300g ?moles
moles KI = 300g KI/166g/mol = 1.81 mole KI
Rxn ratio for KI and PbI₂ => 2:1
∴ moles PbI₂ produced = 1/2(1.81 mole) = 0.9036144 mole (calculator answer)
= 0.9 mole (1 sig. fig.)
Convert 25 g CO2 to moles CO2
write a chemical reaction which is carried out by catalyst with balanced equation
Answer:
CH2 = CH2 + 1/2 O2 -Ag--> CH2-O-CH2
Explanation:
Producing Epoxyethane by reacting ethene in presence of a silver catalyst with a limited amount of oxygen. The temperature range of the reaction is 250 - 300°C.
The balanced reaction is as follows -
CH2 = CH2 + 1/2 O2 (Reactants) -silver catalyst--> CH2-O-CH2 (Product)
what is the percentage of oxygen in Li(NO2)3
Answer:
66.2 % of O
Explanation:
Our compound is the lithium nitrite.
LiNO₂
This salt is ionic and can be dissociated: LiNO₂ → Li⁺ + NO₂⁻
We determine the molar mass:
molar mass of Li + 3 . molar mass of N + 6 . molar mass of O
6.94 g/mol + 3. 14 g/mol + 6 . 16 g/mol = 144.94 g/mol
The mass of oxygen contained in 1 mol of lithium nitrite is:
6 . 16 g/mol = 96 g
So the percentage of oxygen present is:
(96 g / 144.94 g) . 100 = 66.2 %
Will reaction Fe(OH)2 + BaCl2 be going in water?
yes/no and explanation please
Answer:
yes it will react in water as the chem
If 5.0 g of copper metal reacts with a solution of silver nitrate, how many grams of silver metal are recovered?
Cu + Ag(NO3)2=Cu(NO3)2 + Ag
Answer:
16.9g
Explanation:Cu+2AgNO3→2Ag+Cu(NO3)2
Cu will likely have a +2 oxidation state. It is higher in the activity series than Ag, so it is a stronger reducing agent and will reduce Ag in a displacement reaction. Then you need to balance the coefficients knowing than NO3 is -1 and Ag is +1.
Then to calculate the theoretical yield you need to compare moles of the reactants:
m(Cu)=5g
M(Cu)=63.55
n(Cu)=5/63.55=0.0787
By comparing coefficients you require twice as much silver: 0.157mol
n(Ag)=0.157
M(Ag)=107.86
m(Ag)=0.157x107.86=16.9g
Hence, the theoretical yield of this reaction would be 16.9g
What hypothesis can be tested using the experimental set up shown in the picture? A) Light travels faster than sound. B) Light travels in a straight line. C) Light can pass through opaque objects. D) Light can only pass through transparent objects.
Answer:
its B.)
Explanation:
B.) Light travels in a straight line. :))
How many moles ofO are present in 3.5 mol of Al2(SO4)3
Answer:
Name of the compound is aluminum sulphate. chemical formula Al2(SO4)3
In that compound there are two aluminum atoms; three sulphur and 4*3=12 oxygen atoms.
2 oxygen atoms is equivalent to 1 mole oxygen.
so 12 oxygen is equivalent to 12÷2=6 mole oxygen.
i need help i got these wrong on my first attempt
Meteorite: One the surface of Earth
Meteoroid: In outer space
Meteor: Entering Earths atmosphere
Explanation:
HELPPP!!! What is the volume of a 1.31 moles sample of gas if the pressure is 904 mmHg and the temperature is 37. degrees Celsius?
Answer:
27.99 dm³
Explanation:
Applying
PV = nRT................ Equation 1
Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.
From the question, we were aksed to find V.
Therefore we make V the subject of the equation
V = nRT/P................ Equation 2
Given: n = 1.31 moles, T = 37°C = 310K, P = 904 mmHg = (904×0.001316) = 1.1897 atm
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
V = (1.31×310×0.082)/(1.1897)
V = 27.99 dm³
If you have a mixture of baking soda and water, what separation technique would you use?
Answer:
I believe you can evaporate the water.
Explanation:
If you evaporate the water, it leaves the baking soda particles.
Question 5
1 pts
A vinegar solution has a hydrogen ion concentration of 4.0 x 10-4 M. What is the pH?
7.8
5.6
3.4
2.4
Answer:3.4
Explanation:
Calculate the number of grams in 3.99 x 10 20atoms of aluminum.
Answer:
0.018 grams
Explanation:
The number of moles (n) in such number of atoms of Aluminum must be calculated by dividing the number of atoms (nA) by Avagadro's number i.e.
n = nA ÷ 6.02 × 10^23atoms
The number of atoms of Aluminum in this question has been given as: 3.99 x 10^20 atoms.
n = 3.99 x 10^20 ÷ 6.02 × 10^23
n = 3.99/6.02 × 10^(20-23)
n = 0.663 × 10^-3
n = 0.000663moles
Next, we convert the mole value to mass in grams by using the formula;
mole = mass/molar mass
mass = mole × molar mass
Molar mass of Al = 27g/mol
mass (g) = 0.000663 × 27
mass = 0.0179
mass of Aluminum is 0.018grams
PLEASE HELP MEEEE
this is due like in 10 min
how do you explain that 1 OF2 + H2o --> 1 O2 + 2 HF demonstrates that mass is conserved in a chemical l reaction
Answer:
* the total mass of the reactants must equal the total mass of the
products (Law of Conservation of Mass)
Chemical Equation something that uses formulas and symbols to
represent the relative amounts of the reactants
and products of a chemical reaction
Explanation:
whivh of the following is an example of a synthesis reaction
Answer: hewo, there! your answer is Below
d.) 2CuCl + Cl2yields 2CuCl2
Explanation:
A synthesis reaction, also known as a combination reaction, is where two (or more) compounds combine to form a single compound.
Hope this helps!!!
Have a great day!!
Plz Mark branilest!!!
If red is the color on the top of the spectrum being emitted from the prism, what is the color on the bottom?
violet
yellow
green
blue
Answer:
violet
Explanation:
hope this helps!
Weather along most fronts is usually cloudy with precipitation because the warm air along most fronts usually
A) sinking and cooling, causing water to evaporate
B) sinking and warming, causing water to evaporate
C) rising and cooling, causing water vapor to condense
D) rising and warming, causing water vapor to condense
Cloudy with precipitation occurs due to rising and cooling causing water vapor to condense.
Causes of cloudy with precipitationWeather along most fronts is usually cloudy with precipitation because the warm air present along most fronts usually rising and cooling which causes water vapor to condense. Warm fronts often bring stormy weather as the warm air rises above the cool air mass that makes clouds and storms.
These clouds form in the warm air that is located high above the cool air. As the front passes over a region, the clouds become lower which leads to rainfall so we can conclude that cloudy with precipitation occurs due to rising and cooling causing water vapor to condense.
Learn more about precipitation here: https://brainly.com/question/1373907
Learn more: https://brainly.com/question/22960434
The student observes a great blue heron catching fish near the edge of the pond. Based on the information the student collected, which blnd will compete with the great blue heron for the same hunting spots and similar prey?
A. The mallard, because it hunts for fish while wading near the edge of the pond
B. The pied-billed grebe, because it dives in apen water to get crayfish on the bottom of the pond
C. The great egret, because it hunts in water near the edge of the pond for fish and other prey
D. None of these
Answer:
The great egret, because it hunts in water near the edge of the pond for fish and other prey
PLEASE HELP
If a mineral can scratch a penny, what number is it on Mohs Scale?
Explanation:
z o o o m 85675494491 pwd eu3nFG
Lance wants to separate out the salt from a solution of salt water how can he do this
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer: Boiling the water
I hope this helped!
<!> Brainliest is appreciated! <!>
- Zack Slocum
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆