Answer:
[tex]\pi[/tex] r² x h
Explanation:
A can is cylindrical in nature. Using the formula of the volume of the can, we can find this unknown volume.
The volume of cylinder is given as:
Volume of a cylinder = Area x height
Volume of a cylinder = [tex]\pi[/tex] r² x h
Therefore density of the can;
Density = [tex]\frac{mass}{volume}[/tex]
According to the carbon cycle, what two processes increase CO2 in the atmosphere?
Answer: Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement.
Explanation: Hope this helps :)
6. Would you describe each of these temperatures as warm, hot, or cold?
b. 60 °C
a. 100 K
c. 250 K
d. 25 °C
e.
300 K
f. -100 °C
g. 400 K
Answer:
b: Hot
a: Cold
c: Cold
d: Warm
e: Warm
f: Cold
g: Hot
Explanation:
:)
the melting point of gallium metal is 29.76°C If a piece of gallium is sliced into three parts, the melting point will be:
A. higher than 29.76°C
B. 29.76°C
C. lower than 29.76°C
Answer: B. 29.76°C
Explanation:
The melting point is known as an intensive property of matter. This means the melting point is not affected by the amount of mass. Whether the metal is really large or small, the melting point of gallium (Ga) is roughly 29.76 degrees Celsius.
Balance Nuclear Reaction
94239Pu --> 24He + ________
ALL I ask is you answer correctly I'm having a bad day ! :(
Jimmy Fallon was playing with acids and bases and was trying to determine how many grams of Copper (I) Hydroxide he would need to create 48.76 grams of Copper (I) Phosphate when reacting it with Phosphoric Acid.
Answer:
i have no clue whats going on here but imma act like i do.....
Explanation:
How many unpaired electrons are present in V3+?
Answer: two unpaired
Explanation: In general, electrons are removed from the valence-shell s-orbitals before they are removed from valence d-orbitals when transition metals are ionized. And thus, V3+ is paramagnetic, because it has two unpaired 3d-electrons.
Over time, repeated cycles of heating and cooling can cause a rock to crack. The rock may then break into smaller pieces. What is this process called?
Describe what a geologist would observe if she poured acid on the sculpture
Answer:
A geologist would observe how the material that the sculpture is made out of reacts to the acid.
What makes a pure substance different from a heterogeneous mixture? (4 points)
Explanation:
Pure substances are elements and compounds. These substances have the following properties:
All parts are the same throughout which implies that they are homogeneous. They have a definite composition. They cannot be easily separated or broken down into simpler substances by physical meansSeparation by physical means is not possible They have unique sets of physical properties.Heterogeneous mixtures have completely opposite properties as the pure substances as given above.
Iodine monochloride (ICl) has a higher boiling point than bromine (Br2) partly because iodine monochloride is a(n)
Answer: polar molecule.
Explanation:
The boiling point is the temperature at which the vapor pressure of a liquid equals the external pressure surrounding the liquid. The boiling point is dependent on the type of forces present.
Iodine monochloride (ICl) is a polar molecule due to the difference in electronegativities of iodine and chlorine. Thus the molecules are bonded by strong dipole dipole forces. Thus a higher temperature is needed to generate enough vapor pressure.
Bromine [tex](Br_2)[/tex] is a non polar molecule as there is no electronegativity difference between two bromine atoms. The molecules are bonded by weak vanderwaal forces and thus has low boiling point.
Krypton is named after the Greek word that means “secret.” Which explains why krypton was most likely given this name?
Krypton is a halogen, so it is a secret element because it is always part of a compound and is difficult to find by itself.
Krypton is a halogen, so it should be kept secret because it is so reactive and toxic.
Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.
Krypton is a noble gas, so it secretly bonds with every type of element without showing it
Answer:
C) Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.
Explanation:
Answer:
C
Explanation:
covalent bonds always share electrons equally
A: True
B: False
I hope this helped! +*♡
Can anyone help me with this?
Answer:
(a)
[tex]v = 10.1mL[/tex] --- Silicon
[tex]v = 9.0mL[/tex] --- Tin
[tex]v = 7.5mL[/tex] -- Lead
(b)
[tex]d = 1.55g/mL[/tex] --- Silicon
[tex]d = 5.56g/mL[/tex] --- Tin
[tex]d = 9.53g/mL[/tex] --- Lead
Explanation:
Given
The attached table
Solving (a): The volume of each sample
For each element, the volume (v) is calculated as:
[tex]v = v_f - v_i[/tex]
Where:
[tex]v_f = Final\ Volume[/tex]
[tex]v_i = Initial\ Volume[/tex]
So, we have:
Silicon:
[tex]v_f = 40.1mL;\ \ \ v_i = 30.0mL[/tex]
So, we have:
[tex]v = 40.1mL - 30.0mL[/tex]
[tex]v = 10.1mL[/tex]
Tin:
[tex]v_f = 29.0mL;\ \ \ v_i = 20.0mL[/tex]
So, we have:
[tex]v = 29.0mL - 20.0mL[/tex]
[tex]v = 9.0mL[/tex]
Lead:
[tex]v_f = 33.5mL;\ \ \ v_i = 26.0mL[/tex]
So, we have:
[tex]v = 33.5mL - 26.0mL[/tex]
[tex]v = 7.5mL[/tex]
Solving (b): The density of each sample
For each element, the density (d) is calculated as:
[tex]d = \frac{m}{v}[/tex]
Where
[tex]m = mass[/tex]
[tex]v = volume[/tex]
So, we have:
Silicon:
[tex]m = 15.70g[/tex]
[tex]v = 10.1mL[/tex] --- calculated in (a)
Density (d):
[tex]d = \frac{15.70g}{10.1mL}[/tex]
[tex]d = 1.55g/mL[/tex]
Tin:
[tex]m = 50.07g[/tex]
[tex]v = 9.0mL[/tex] --- calculated in (a)
Density (d):
[tex]d = \frac{50.07g}{9.0mL}[/tex]
[tex]d = 5.56g/mL[/tex]
Lead:
[tex]m = 71.47g[/tex]
[tex]v = 7.5mL[/tex] --- calculated in (a)
Density (d):
[tex]d = \frac{71.47g}{7.5mL}[/tex]
[tex]d = 9.53g/mL[/tex]
can someone answer this question?
Answer:
what is the question i could help if u gave me the question but i don't see it
Explanation:
PLSS HELP! The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide? (4 points)
a. Carbon and oxygen are chemically bonded in it.
b. Carbon and oxygen retain their original identity in it.
c. It can be separated into carbon and oxygen using physical methods.
d. The proportion of carbon and oxygen is different in different samples of the gas.
Answer:
The answer is option A..
A balloon is filled with helium gas has a volume of 1.0 L at a pressure of 1.0 atm. The
balloon is released and reaches an altitude where the pressure is now 0.4 atm. What is the
new volume of the balloon at this altitude assuming the air temperature has not changed?
Answer:
2.5 LExplanation:
The new volume of the balloon can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{1 \times 1}{0.4} = \frac{1}{0.4} \\ = 2.5[/tex]
We have the final answer as
2.5 LHope this helps you
A small amount of solid potassium dichromate is added to water and stirred until all of the solid has dissolved and a clear orange liquid is produced. This process may be described as: Group of answer choices the formation of a heterogeneous mixture. dissolution of the molecular compound sublimation. dissolution and dissociation of the ionic compound.
Answer: dissolution and dissociation of the ionic compound.
Explanation:
Ionic compound is formed by the transfer of electrons.
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here potassium metal forms [tex]K^+[/tex] cation and [tex]Cr_2O_7^{2-}[/tex] anion which exchange their oxidation states to form [tex]K_2Cr_2O_7[/tex].
When ionic compound is dissolved in water, it dissociates to its respective ions.The ions form bonds with oppositely charged ions of water molecules and thus get dissolved in water called as dissolution.
What is not a mass of 1 mole of a substance?
Explanation:
been defined in such a way. It is defined as the numbers of particles in 12 g of 12C. If it were 24 g instead of 12 g, then the weight of 1 mole of substance would equal 2 times the atomic/molecular mass in grams.
Which nuclear equation represents a spontaneous decay?
(1) Rn 21% Po + He
(2) 13 Al + He 18P + on
(3) 235 U + in ~ 13% Ba + Kr + 3n
(4) Li + H → He + He
a. 1
b. 2
C 3
d. 4
Answer:
a. 1
Explanation:
Radon is a member of group 18. It is an odorless heavy gas, that emanates from materials that contain uranium.
Rn is a decay product of 226-Ra, a member of the uranium decay series. The spontaneous decay of Rn decay leads to the emission of an alpha particle.
Rn has a half-life of about 3.8 days and its decay product is 218Po.
The nuclear reaction which shows a spontaneous decay is Rn 21% Po + He.
What is spontaneous reaction?
Those reaction in which value of their enthalpy change and change in Gibb's free energy is negative, are spontaneous in nature.
Among all of the given reaction, only first reaction is spontaneous in nature because the given element Radon (Rn) is the product of the decay of uranium series. And in this reaction energy is emitted in the form of alpha particles.
Hence, option (1) is correct.
To know more about spontaneous reaction, visit the below link:
https://brainly.com/question/24376583
Use the drop-down menus to complete the statements.
A segment of DNA is called a
.
A complex of nucleic acids and proteins that make up chromosomes is called
.
A structure in the nucleus of an eukaryotic cell that is made up of condensed DNA is called a
.
A segment of DNA is called a gene.
A complex of nucleic acids and proteins that make up chromosomes is called Chromatin
A structure in the nucleus of an eukaryotic cell that is made up of condensed DNA is called a chromosome.
Answer:
1. Gene
2. Chromatin
3. chromosome
Explanation:
I hope this helps you :)
hi can you pls help :)
Answer:i think it is c, it explodes in water because that’s a chemical reaction
Explanation:
Oxygen Molecules taken in per breath: The Athletes result will be?
Answer:
Explanation:
the answer is higher because there is more exercise that makes it higher
hope this helps
Which statement is true regarding a catalyst?
A). A catalyst increases the activation energy for a chemical reaction.
b). A catalyst decreases the difference in energy for a chemical reaction.
c). A catalyst allows the reactants to start at a higher energy level.
d). A catalyst lowers the activation energy for a chemical reaction.
Answer:
d). A catalyst lowers the activation energy for a chemical reaction.
Explanation:
From the given choices, it is true that a catalyst lowers the activation energy for a chemical reaction.
The activation energy is the energy barrier that must be overcome before a chemical reaction can occur.
Some reactions have very high activation energy and would not occur without the introduction of a catalyst.
The catalyst brings the reactants into contact by removing the energy deficiency in the system.
As of January 2009, the USA has produced 60,000 metric tons of nuclear waste in 60 yesrs of operating 104 nuclear power plants.
on average how much waste is produced by each plant on a monthly basis?
a. 0.8 tons p. month
b. 83.3 tons p. month
c. 104 tons p. month
d. 866.3 tons p. month
Answer: a. 0.8 tons p. month.
Explanation:
Given: Total nuclear waste = 60,000 metric tons
Time take = 60 years = 12 x 60 months [ 1 year = 12 months]
= 720 months
Total nuclear power plants = 104
Now , Average waste produced by each plant = [tex]\dfrac{\text{Total waste}}{\text{Time x Number of plants}}[/tex]
[tex]=\dfrac{60000}{720\times104}\approx0.8\text{ tons per month.}[/tex]
Hence, 0.8 tons p. month is produced by each plant.
So, option a. is correct.
Answer:
A on edge 2021
Explanation:
What does it mean when you ask your dad whats he going to do with the chikens and hes says feed them some fried chiken?
Answer:
It means your dad is making those chickens cannibal's.......
Explanation:
Answer:
Hes gonna cook those chickens.....
Which of the following elements is the least electronegative?
A. NA
B. Al
C. Cl
D. Si
Answer:
na
Explanation:
gggggggggggggggggggggggggg
Cl (chlorine) ion is negatively charged.
what’s the answer to this question pls help
When 29 grams of sodium metal (Na) react with 49 grams of chlorine gas (C1), solid
sodium chloride (NaCl) is created in synthesis reaction. How much excess sodium OR
chlorine is left over?
Answer:
Explanation:
Na + Cl = NaCl
23 g 35.5 g
23 g sodium reacts with 35.5 g of chlorine
29 g of sodium reacts with 35.5 x 29 / 23 g of chlorine
= 44.76 g
So 44.76 g of chlorine reacts and 49 - 44.76 = 4.24 g of chlorine is left over .
All the sodium is used up in the reaction .
plzz help guyss I'm so confused
Starting from rest, you reach a speed of 20 m/s in 4 seconds. What is your acceleration?
Finn is investigating how energy affects objects. He adds energy to an object as shown.
Will the energy he has added cause the object to move?
no, because the light energy from the battery will change its mass
no, because heat energy from the battery will change its temperature
yes, because the battery’s mechanical energy will make the motor run
yes, because the battery’s electrical energy will make its wheels turn
Answer:
Yes because
Explanation:
Answer:yes because the battery's electrical energy will make the wheels turn.