Answer:
5 g/cm3
Explanation:
Density = mass/volume
density = 15g / 3 cm3 = 5g/cm3
Answer:
3.34 g/cm3
Explanation:
what is the chemical formula for stannic oxide
Answer:
SnO₂
Explanation:
the chemial formula for stannic oxide is SnO₂
Cells, chromosomes, Body system, DNA (smallest to largest)
Explanation:
cells, dna, chromosomes, body systems
The relationship between kinetic energy and speed is
Answer:
The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved.
This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed.
KE = 0.5 • m • v2
where m = mass of object
v = speed of object
That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. For a threefold increase in speed, the kinetic energy will increase by a factor of nine.
HEYOO PEEPS 1. Ethan Rides his bike up a 20km hill in 2hrs. Ethan rides his bike down the 20km hill in .5 hrs. What is Ethan’s average speed?
Answer:
let Leo's speed = x mile/hr
so Ethan speed = (x + 6) miles per hour
Distance = Speed × Time
so distance traveled by Leo in 2 hours = x × 2 = 2x
and distance traveled by Ethan in 1.5 hours = 1.5( x + 6 ) = 1.5x + 9
since they meet on the path , After Ethan has ridden 1.5 hours and Leo has ridden 2 hours , so together the have traveled on complete path that is 65 miles.
⇒ distance traveled by leo in 2 hours + distance traveled by Ethan in 1.5 hours = 65
⇒ 2x + 1.5x + 9 = 65
⇒ 3.5x = 56
⇒ x = 16
Hence Leo's speed = x miles/hr = 16 miles/hour
and Ethan's speed = (x + 6) miles/hr = 16 +6 = 22 mile/hour
Explanation:
sorry if this isnt the one im think of
Due in 5 mins!!!! Pls hurry
Which of the following would be the best example of potential energy?
A racecar moving at 120 miles per hour around a track.
a bullet shot out of a gun
a rollercoaster at the bottom of the first hill
a rubber band stretched to its fullest length right before someone lets it go
Answer:
D because it is in a fixed position
Explain the difference between naming a covalent compound and an ionic compound.
Answer: An ion with fewer electrons than its neutral atom is called a(n) cation. The charge of an ion with more electrons than its neutral atom is. negative.Name an ionic compound by the cation followed by the anion. ... Covalent compounds are formed when two or more nonmetal atoms bond by sharing valence electrons. Valence electrons are the outermost electrons of an atom.
Explanation:
114. The following equation describes the oxidation of ethanol to acetic acid by potassium permanganate!
3C,H,OH + 4KMnO4 → 3HC,H,O2 + 4MnO+4KOH + H2O
5.00 g of ethanol (46.07 g/mol) and an excess of aqueous KMnO4 are reacted, and 5.99 g of HC2H302 (60.05
g/mol) result. What is the percent yield?
Answer:
Explanation:
The following equation describes the oxidation of ethanol to aceticacid by potassium permanganate:
3C2H5OH +4KMnO4-->3HC2H3O2 +4MnO2 + 4KOH + H2O
5.0 g of ethanol and an excess of aqueous KMnO4 arereacted, and 5.9 g HC2H3O2 result.What is the percent yield?
a. 100%
b. 91%
c. 67%
d. 30%
e. 5.9 g HC2H3O2 is impossible since it represcents more than a100% yield.
The percent yield of acetic acid is 91.9%
From the question,
We are to determine the percent yield of the acetic acid
To determine the percent yield of the acetic acid, we will calculate the theoretical yield first.
The balanced chemical equation for the reaction is
3C₂H₅OH + 4KMnO₄ → 3HC₂H₃O₂ + 4MnO₂ + 4KOH + H₂O
This means
3 moles of ethanol reacts with 4 moles of potassium permanganate to produce 3 moles of acetic acid
Now, we will determine the number of moles of ethanol that reacted
From the question
Mass of ethanol that reacted = 5.00 g
Molar mass of ethanol = 46.07 g/mol
Using the formula
[tex]Number\ of\ moles= \frac{Mass}{Molar\ mass}[/tex]
∴ Number of moles of ethanol = [tex]\frac{5.00}{46.07}[/tex]
Number of moles of ethanol that reacted = 0.10853 mole
Now,
From the balanced chemical equation,
3 moles of ethanol reacts with 4 moles of potassium permanganate to produce 3 moles of acetic acid
Then,
0.10853 mole of ethanol reacts with the excess potassium permanganate to produce 0.10853 mole of acetic acid
∴ 0.10853 mole of acetic acid will be produced
Now, for the mass of acetic acid that would be produced
From the formula
Mass = Number of moles × Molar mass
From the question
Molar mass of acetic acid = 60.05 g/mol
∴ Mass of acetic acid that will be produced = 0.10853 × 60.05
Mass of acetic acid that will be produced = 6.5172 g
This is the theoretical yield of acetic acid
Now, for the percent yield
[tex]Percent\ yield = \frac{Actual\ yield}{Theoretical\ yield} \times 100\%[/tex]
From the question,
Actual yield = 5.99 g
∴ [tex]Percent\ yield = \frac{5.99}{6.5172} \times 100\%[/tex]
[tex]Percent\ yield = \frac{599}{6.5172} \%[/tex]
Percent yield = 91.9106 %
Percent yield ≅ 91.9%
Hence, the percent yield of acetic acid is 91.9%
Learn more here: https://brainly.com/question/19655772
Please help my teacher has like given up
Calculate the molar volume (volume of 1.0 mole) of an ideal gas at 1.0 atm and 25 °C?
Answer:
24.47 L
Explanation:
Using the general gas law equation:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = 0.0821 Latm/molK
T = temperature (K)
According to the provided information in this question,
P = 1.0 atm
V = ?
n = 1 mol
T = 25°C = 25 + 273 = 298K
Using PV = nRT
V = nRT ÷ P
V = 1 × 0.0821 × 298 ÷ 1
V = 24.465 ÷ 1
V = 24.465
V = 24.47 L
22) Name the neutral element with this orbital diagram.
Answer:
Sn (Tin)
Explanation:
How plants affect weathering?
Plants can grow in between rocks and break apart into smaller pieces.
Plants can prevent water from eroding rocks.
Plants can prevent wind from eroding rocks.
Plants can move rocks into smaller pieces.
Answer:
plants can grow in between rocks and break apart into smaller pieces
Explanation:
(science)
hurry help!!
A person who is physically addicted to and emotionally dependent on alcohol has the disease called___________.
a. alcoholitis
b. osteoporosis
c. alcoholism
d. Parkinson's
Answer:
C
Explanation:
Alcoholism is the inability to control drinking due to both a physical and emotional dependence on alcohol.
The poisonous gas hydrogen sulfide, H2S, can be neutralized with a base such as sodium hydroxide,
NaOH. The unbalanced equation for this reaction follows:
NaOH(aq) + H25(e) → Na2S(aq) + H2O(1)
A student who was asked to balance this equation wrote the following:
Na2OH(aq) + H2S(g) → Na2S(aq) + H2O(
Is this equation balanced? Is it correct? Explain why or why not, and supply the correct balanced
equation if necessary.
Answer:
It's not correct. For balancing, we need to put the coefficients in the molecule, not in the athom. Because if you do this, you're creating another molecule, instead of a balacing, for which the reaction may not happen - but anyway, it would be another reaction.
The correct balacing is:
2NaOH + 1H2S → 1Na2S + 2H2O
Explanation:
Look: Na2OH does not even exist. OH has only one free link, so he can't - in normal conditions - make another one with any athom. That's why we should write 2NaOH instead of Na2OH. The first means "2 mols of NaOH".
What type of bond will form between potassium and iodine
Answer:
ionic bond
Explanation:
How many molecules are there in 3.20 grams of NH4SO2?? explain if you can
Answer:
0.0389757845886336
Explanation:
What is Hg2Cl2 empirical formula?
Answer:
Mercury chloride's(HgCI2) empirical formula is HgCI.
Explanation:
How many joules of energy are required to vaporize 250.0g of water at 100 degrees Celsius?
Answer: Q=104525J
Explanation: where Q is the heat energy required to heat a mass, m , though a change in temperature of Δ T and c is the heat capacity of the material (found in books!). Typical units are Q in Joules or J , m in k g and Δ T is in either Kelvin, K , or degrees Celsius o C . The units of c depend on the other units used but J / k g o C is typical.
The offspring of a sexually reproducing organism receives
A.
half of its genetic material from each parent.
B.
an exact copy of each parent's genetic material.
C.
an exact copy of one parent's genetic material.
D.
genetic material that is not related to either parent.
Answer:
It's A because its almost like a personality its just a sexuallity / gender
Answer:
half of its genetic material from each parent.
Explanation:
when a catalyst is added to reactants, the reaction rate may increase or..
A: occur at a lower temperature
B: decrease
C: stay the same
Answer:
a
Explanation:
It increases the reaction rate by lowering the activation energy for a reaction
What theory was Huygens writing about?
the particle theory of light
the reflection of light off objects
the way objects refract light
the wave theory of light
Answer:is D.the wave theory of light
Explanation:
cuz i got it wrong :( but the answer is correct :3
Answer:
D) wave theory of light
Explanation:
How would you describe boiling point?
Answer:
Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. Water at its boiling point.
Explanation:
g00gle worls
balance the equation
H2O +SO3 H2SO4
Answer:
H2O + SO3 → H2SO4
this is the answer for
this question
what is enviorement.
Answer:
the natural and man made thing which we can see around us is known as environment. not enviorement.
Answer:
Environment means anything that surrounds us. It can be living (biotic) or non-living (abiotic) things. It includes physical, chemical and other natural forces. ... In the environment there are different interactions between animals, plants, soil, water, and other living and non-living things.
How can you tell if two objects are in thermal equilibrium?
The objects have the same temperature.
The objects are touching each other.
The objects' temperatures are changing.
The objects are the same size.
Answer:
Two objects are in thermal equilibrium if they are in close contact that allows either to gain energy from the other.
Answer: The Objects have the same temperature
Explanation: i just took the test
The technology of sesimograph is helpful to humans because it
Answer:
Explanation:
Seismographs can detect quakes that are too small for humans to feel. During an earthquake, ground-shaking seismic waves radiate outward from the quake source, called the epicenter. Different types of seismic waves travel at different speeds and through different parts of the Earth during a quake.
hey can someone help me please
Explanation:
A period in a periodic table is a row of chemical elements.A. magnesium (Mg). B.potassium(k). C.iron(Fe). D.copper(Cu)A.C(carbon). B.Cl(chlorine). C.Au(gold). D.Sr(strontium)He(helium 1).Ge(germanium 4). Rb(rubidium 5).I(iodine 5)Sulfur(VIA or6A). Ca(calcium 2A). iodine (VIIA or 7A). Fe(iron VIIIB or 8B)Halogen (chlorine, iodine) . Chalogen(sulfur). AIkali metal(. potassium and. sodium ). Boron(boron). Lanthanide series(Lanthanum). Alkaline earth metal(magnesium and calcium). Transition metal (iron gold). Nobel gas(Helium Argon)10.0 points
When sodium azide is activated in an auto-
mobile airbag, nitrogen gas and sodium are
produced according to the equation
2 NaN_(s) —> Na(s) + 3N2(g).
If 0.12 mol of NaN3 reacts, what mass of
nitrogen would result?
Answer in units of g.
define friction in your own words
PLS HURRY MY TEST IS TIMED
Question 8(Multiple Choice Worth 5 points)
(08.04 LC)
Investigator Barnes is analyzing materials from an explosive. He finds traces of fertilizer that was used to build the bomb.
identify a possible suspect from the fertilizer?
Run a trace on the chemical marker placed by the manufacturer
Track down where the fertilizer was sold and who bought it
Input the color of the fertilizer into a registry to find the manufacture
Extract DNA from the fertilizer to identify its origin
Answer:
Extract DNA from the fertilizer to identify its origin.
Explanation:
Barnes find out that fertilizer was used in the explosive material. Barnes should now identify the origin of this type of fertilizer so that its root can be determined. When the origin is unable to be determined then Barnes should keep the traces of the fertilizer and try to identify the manufacturer.
Answer:
Track down where the fertilizer was sold and who bought it
Explanation:
I, myself, took this exam.
What is true of the mass and volume of all the floating objects?
Answer:
if the density is higher than water than the object will sink
Explanation:
Number of atoms in a 95.0 g sample of a gold nugget
Answer:
2.9 * 10^23 atoms Au
Explanation:
(95 g Au) * (1 mol Au/196.96657) * (6.02 * 10^23 atoms Au / 1 Mol Au)
2.9 * 10^23 atoms Au