Answer:
Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching, or twisting the object.
A 5 kilogram ball and a 10 kilogram ball are sitting on the edge of a wall. Which has more potential energy?
The 10 kilogram ball.
The 5 kilogram ball.
The have the same energy.
Answer:
The 10 kilogram ball
Explanation:
Why when we chew a minty pice of gum your mouth and tounge is cold when you suck in air and when you drink moderaters help!!!!!!!!!!!! ASAP!!!!!!!!!!!!!!!!!!!
answers please!!!!!!
(a) HCL(aq) + NaOH(aq) ---------------> ___ + ____
The answer will be NaCl and H2O
(b) An equation to show the reaction between hydrogen ions and hydrogen ions and hydroxide ions is given below :
H+ + OH− ⇄ H2O
This reaction is known as neutralization reaction.
(c) Joey could tell us the reaction is over only when we obtained salt and water from the given chemical reaction (NaOH + HCl). This a basically a neutralization reaction ( the reaction generally finished at equilibrium)
(d) pH is 7.
This is because at the ending point the moles of HCl = the moles of NaOH so all that is present is H2O, Cl–, and Na+. So, the pH is 7.
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What type of soil is best for growing plants?
ASAP please and Thankyou
1-calculate the mass of 4 moles of Na
2-what is the mass of 0.3 moles of water H2o H:1 O:16
3-compute the number of moles found in 10g of ethanol C2H5OH C:12 O:16
please help me as fast you can
1. 92 g
2. 5.4 g
3. 0.217 moles
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
[tex]\tt n=\dfrac{m}{MW}[/tex]
1. the mass of 4 moles of Na(MW= 23 g/mol)
[tex]\tt mass=mol\times MW\\\\mass=4\times 23\\\\mass=92~g[/tex]
2. the mass of 0.3 moles of water(MW=18 g/mol)
[tex]\tt mass=mol\times MW\\\\mass=0.3\times 18\\\\mass=5.4~g[/tex]
3. the number of moles found in 10g of ethanol C2H5OH(MW=46 g/mol) :
[tex]\tt mol=\dfrac{10}{46}\\\\mol=0.217[/tex]
Write correct formulas predict the products and balance the following.
Tin (IV) Sulfate + Ammonium Phosphate forms ?
In 2018, Micah Williams, of Benson High School, set the Oregon High School State Track meet record in the 100 meter dash by posting a time of 10.42 seconds. What was his average speed?
Answer:
Average speed = 9.59 m/s
Explanation:
Given data:
Distance = 100 m
Time taken = 10.42 s
Average speed = ?
Solution:
Formula:
Average speed = distance covered / time taken
by putting values,
Average speed = 100 m / 10.42 s
Average speed = 9.59 m/s
What letters in the middle of an element card represent?
How can you predict which element an atom is based on one of the two subatomic particles in the nucleus?
Which two of the three subatomic particles have an effect on the mass of an atom?
Answer:
I think it's the second answer
in a particular gravimetric analysis, the precipitate of barium sulfate was weighed before it was completely dried. the likely impact of this error on the calculated result is...
The result is a higher result than the correct value.
Gravimetric analysis describes a set of methods used in analytical chemistry for the quantitative determination of an analyte based on its mass. The principle of this type of analysis is that once an ion's mass has been determined as a unique compound, that known measurement can then be used to determine the same analyte's mass in a mixture, as long as the relative quantities of the other constituents are known.
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What substance, if added to the mixture of salt and sand, could be separated from the mixture using a sieve
O sugar
O iron filings
O flour
O plastic beads
The OH-ion concentration of a blood sample is
2.5 x 10-7M. What is the pH of the blood?
a. 6.60
b.0.99
c.740
d.1
Answer:
She okeyy
Explanation:
Example 740 are the think free ofıce pH of the blood 740 blood sample iş takipte kal ❣️
How do the number of protons, rumber of neutrons, and the mass number relate to each other
Answer:
Protons are the atomic number and for each element they never change.
Electrons are equal to the atomic number unless it is an Ion (Positive charge means it has less negative means it has more)
Mass number is Protons+Nuetrons
Explanation:
Write the name of Co4(SiO4)3
Answer:
Copper siliconquadoxide
Explanation:
What measurements have the same number of significant figures as the measured number
0.1060?
Answer: 0.3224, 7342, 54.32
Explanation:
0.1060 has 4 sig figs (1060 is 4 digits after the decimal point)
calculate the number of magnesium atoms in a 120.0g sample of forsterite mg2sio4. be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
The number of magnesium atoms present in forsterite are 10.272 x 10²³
Equation :First we have to calculate the moles of magnesium
moles of forsterite = mass of forsterite / molecular mass of forsterite
moles of forsterite = 120.0 g / 140.69 g/mol
moles of forsterite = 0.8529 mole
Now we have to calculate the number of magnesium atoms
The formula of forsterite is mg2sio4
In the forsterite molecule, there 2 atoms of magnesium, 1 atoms of silicon and 4 atoms of oxygen.
As, 1 mole of forsterite contains 2 x 6.022 x 10²³ number of magnesium
So, 0.8529 mol of forsterite contains
= 0.8529 x 2 x 6.022 x 10²³
= 10.272 x 10²³ number of magnesium atoms
Therefore, the number of magnesium atoms present in forsterite are 10.272 x 10²³.
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Convert 34.5 oC into K. K = oC + 273.15 K
A 34.5 K
B 238.65 K
C 307.65 K
D 273.15 K
Conversion of 34.5 °C to K = C 307.65 K
Further explanationTemperature is one of the principal quantities that shows the degree of heat or cold from an object / space
Temperature is used as a guide to the level of heat energy from objects
Temperature measures thermal energy
The temperature conversion :
°F = (9/5) °C + 32
°R = (4/5) °C
°K = °C + 273 .15
34.5 °C into K
[tex]\tt 34.5+273.15=\boxed{\bold{307.65~K}}[/tex]
Answer:
Temperature is one of the principal quantities that shows the degree of heat or cold from an object / space
Temperature is used as a guide to the level of heat energy from objects
Temperature measures thermal energy
The temperature conversion :
°F = (9/5) °C + 32
°R = (4/5) °C
°K = °C + 273 .15
Explanation:
(b) largest radius: S, CI, P
Answer:
P
Explanation:
radius decreases as you go from left to right
What is the mass, in grams, of 122 atoms of aluminum? Round your answer to proper significant figures.
Answer:
Mass = 547.02 × 10⁻²³g
Explanation:
Given data:
Number of atoms of Al = 122 atom
Mass in gram = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
122 atom/6.022 × 10²³ atoms × 1 mol
20.26× 10⁻²³ mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 20.26× 10⁻²³ mol × 27 g/mol
Mass = 547.02 × 10⁻²³g
2. A gas that has a volume of 28 liters, a ternperature of 45 °C, and an unknown
pressure has its volume increased to 34 iters and its temperature decreased to
35 °C. If I measure the pressure after the change to be 2.0 atm, what was the
original pressure of the gas?
The original pressure of the gas : 2.507 atm
Further explanationBoyle's law and Gay Lussac's law
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
P1 = initial gas pressure (N/m² or Pa)
V1 = initial gas volume (m³)
P2 = final gas pressure
V2 = final gas volume
T1 = initial gas temperature (K)
T2 = final gas temperature
V₁=28 L
T₁=45+273=318 K
P₂=2 atm
V₂=34 L
T₂=35+273=308 K
then initial pressure :
[tex]\tt P_1=\dfrac{P_2.V_2.T_1}{V_1.T_2}\\\\P_1=\dfrac{2\times 34\times 318}{28\times 308}\\\\P_1=2.507~atm[/tex]
Which of the following is a reactant?
Answer:
CH4 is a reactant
Explanation:
however 2o2 is also reactant but coefficient
what is a polar zone
Answer:
polar zone - the part of the Earth's surface forming a cap over a pole; characterized by frigid climate. Frigid Zone, polar region. climatic zone - any of the geographical zones loosely divided according to prevailing climate and latitude.
Explanation:
The polar regions, also called the frigid zones, of Earth are the regions of the planet that surround its geographical poles, lying within the polar circles.
The membrane of the egg I like the cell membranes because
Which of the statements are true ONLY for lonic compounds? (select all that apply)
Smallest unit is called a formula unit
Bonding determined by valence electrons and the octet rule
Compounds are electrically neutral (no charge) overall
Forms between a metal and a nonmetal
Compounds have relatively weak bonds
Creates geometrical shapes that minimize electron pair repulsion (VSPER model)
Forms between two non-metals
Formed by the transfer of electrons
Good conductor when dissolved in water
Formed when atoms share valence electrons
Smallest unit is a molecule
Forms repeating patterns in a crystal lattice structure
Have high melting and boiling points
Answer:
Smallest unit is called a formula unit
Forms between a metal and a nonmetal
Formed by the transfer of electrons
Good conductor when dissolved in water
Forms repeating patterns in a crystal lattice structure
Have high melting and boiling points
Explanation:
Balance all the equations
1)Ferric chloride + Ammonium hydroxide Ferric hydroxide + Ammonium chloride
2) Aluminum + Hydrochloric acid Aluminium chloride + Hydrogen gas
Answer:
Balancing Chemical Equations
Balance the equations below:
1) __1__ N2 + __3__ H2 > _2__ NH3
2) __2__ KClO3 >⮴ __2__ KCl + __3__ O2
3) __2__ NaCl + __1__ F2 ⮴ __2__ NaF + __1__ Cl2
4) __2__ H2 + __1__ O2 ⮴ __2__ H2O
5) __1__ Pb(OH)2 + __2__ HCl ⮴ __2__ H2O + __1__ PbCl2
6)__2__ AlBr3 + __3__ K2SO4 ⮴ __6__ KBr + __1__ Al2(SO4)3
7) __1__ CH4 + __2__ O2 ⮴ __1__ CO2 + __2__ H2O
8) _1___ C3H8 + _5___ O2 ⮴ __3__ CO2 + __4__ H2O
9) __2__ C8H18 + __25__ O2 ⮴ __16__ CO2 + __18__ H2O
10) __1__ FeCl3 + __3__ NaOH ⮴ __1__ Fe(OH)3 + __3__NaCl
11) __4__ P + __5__O2 ⮴ __2__P2O5
12) __2__ Na + __2__ H2O ⮴ __2__ NaOH + __1__H2
13) __2__ Ag2O ⮴ __4__ Ag + __1__O2
14) __1__ S8 + __12__O2 ⮴ __8__ SO3
15) _6___ CO2 + _6___ H2O ⮴ __1__ C6H12O6 + __6__O2
16) ___1_ K + __1__ MgBr ⮴ __1__ KBr + __1__ Mg
17) __2__ HCl + __1__ CaCO3 ⮴ __1__ CaCl2 + __1__H2O + __1__ CO2
18) __1__ HNO3 + __1__ NaHCO3 ⮴ __1__ NaNO3 + __1__ H2O + _1___ CO2
19) _2___ H2O + __1__ O2 ⮴ __2__ H2O2
20) __2__ NaBr + __1__ CaF2 ⮴ __2__ NaF + __1__ CaBr2
Explanation:
Question 4 (2 points)
Photosynthesis takes place in the nucleus of cells. (2 points)
O True
O False
false
Explanation:photosynthesis takes place inside an organelle called a chloroplast. For plants, chloroplast-containing cells exist in the mesophyll.
use the term reclamation in a sentence
Answer:
Explanation:
The increase of the arable land has been affected partly by the reclamation of the marshes, but mostly by the transformation of large tracts of the puszta
An example of a reclamation is how landfill employees sift through garbage to find usable items. An example of a reclamation is trees growing on land that was heavily logged.
if vegetable oils made of vegetables, and olive oils made of olives......whats baby oil made of?
ANSWER:
oil lol
EXPLANATION:
Answer:
Mineral oil, fragrance, aloe barbadensis leaf extract, tocopheryl acetate (vitamin E), water.
Explanation:
which need or want does this technology meet
Answer:
B. It allows people to rapidly heat items.
Explanation:
because it's a microwave...
Answer:
B. It allows people to rapidly heat items.
I am a bit skeptical about the radiation that allows microwaves to heat items so quickly though...
Explanation:
This is common sense, mate. Sorry to break it to you.
70% of rubbing alcohol is made up of water & alcohol that is used as antiseptic and disinfectant. Which of the following is the solute?
a. 30 parts alcohol
b. 70 parts water
c. 30 parts water
d. 70 parts alcohol
Answer:
choose a. 30 parts alcohol