Answer:
They hatch into larvae.
Explanation:
A block of lead displaces 50.5ml of water. The block weighs 698 g. From this
information, calculate the density of lead.
Answer:
13.82 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{698}{50.5} \\ = 13.8217...[/tex]
We have the final answer as
13.82 g/mLHope this helps you
please help this is worth half of my grade! what letter represents the trough of the wave a,b,c,d,e
Hello good afternoon...God bless the answer to your following question is D
because...A crest point on a wave is the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point in a cycle.
Please help
2C3H5O2
1.How many elements are present?
2. How many hydrogen atoms are there?
3. How many oxygen atoms are there?
4.How many total atoms are there?
Answer:
1. 3 elements: C, H, O
2. 10
3. 4
4. 20
Explanation:
Convert 5 micrometers to meters
Suppose you found a material in which 12.5% of the original radioactive atoms were present. If the half-life is 10years, how old is the material?
Answer:
The material is 30 years old.
Explanation:
The decay of radioactive isotopes can be modelled by the following ordinary differential equation:
[tex]\frac{dm}{dt} = -\frac{m(t)}{\tau}[/tex] (Eq. 1)
Where:
[tex]m(t)[/tex] - Current mass of the isotope, measured in grams.
[tex]\tau[/tex] - Time constant, measured in years.
[tex]\frac{dm}{dt}[/tex] - Rate of change of the isotope in time, measured in grams per year.
After some handling, we find that the solution of the differential equation is:
[tex]\frac{m(t)}{m_{o}} = e^{-\frac{t}{\tau} }[/tex] (Eq. 2)
Where:
[tex]m_{o}[/tex] - Initial mass of the isotope, measured in grams.
[tex]t[/tex] - Time, measured in years.
Now we clear time within the expression above:
[tex]t = -\tau\cdot \ln \frac{m(t)}{m_{o}}[/tex]
Besides, we determine the time constant in terms of the half-life ([tex]t_{1/2}[/tex]), measured in years:
[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (Eq. 3)
If we know that [tex]t_{1/2} = 10\,yr[/tex] and [tex]\frac{m(t)}{m_{o}} = 0.125[/tex], then the age of the material is:
[tex]\tau = \frac{10\,yr}{\ln 2}[/tex]
[tex]\tau = 14.427\,yr[/tex]
[tex]t = -(14.427\,yr)\cdot \ln 0.125[/tex]
[tex]t \approx 30\,yr[/tex]
The material is 30 years old.
Binary Covalent (molecular) Compounds
Name the following covalent compounds:
CO___________________
CO2__________________
NO__________________
NO2___________________________
SF6____________________________
SiF4___________________________
N2S3__________________________
B2H6________________
SO2 ________________
CH4_________________
Write the formula for the following covalent compounds:
Boron trichloride__________
Nitrogen monoxide____________
Dinitrogen monoxide__________
Dinitrogen pentoxide ________
Sulfur hexachloride________
Carbon monoxide__________
Carbon disulfide________
Oxygen difluoride__________
Dinitrogen tetrahydride________
Silicon tetrahydride __________
Mixing up Binary Compounds
Classify & Name the following binary compounds: (I or M)
____BaNO3 _______________
____SrO_______________
____NaI_______________
____Mg3(PO4)2______________________
____K2SO4________________
____OF2_________________________
____NH3_________________________
____BaF2_________________________
____LiCl________________
____BeO________________________
____MgSO4________________
____Al2O3________________________
Classify & Write the formula for the following binary compounds (I or M)
____Phosphorous trichloride____
____Chlorine monofluoride_____
____potassium hydroxide______
____strontium sulfide_____
____Calcium nitrate_______
____Carbon tetrabromide____
____Lithium hydroxide________
____Potassium sulfate____
____lithium bromide_____
____magnesium sulfide_____
___ calcium nitride____
Answer:
why is ur name different sexxxy............................................................
Explanation:
how many hydrogen atoms are there in one mole of ethanol.
What state of matter is steam?
A. Gas
B. Liquid
C. Solid
D.Transitive
Answer:
Steam is an invisible gas
Explanation:
so A. Gas
Answer:
gas
Explanation:
Which of the following has the highest electronegativity?
A. Na
B. Li
C. C
D. Si
Answer:
C. C, because it’s the highest of all four and C is 2,5 which is medium but the highest one.
Answer:
Si
Explanation:
Because it has the most electrons among the four
Heeeeeelp will give brainliest
What is the total number of atoms in 36 molecules of glucose C6 (H2O) 6
Answer:
Explanation:
Glucose has a chemical formula of: C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.
What does an atomic number represent in an atom? number of neutrons number of protons number of electrons number of protons and neutrons
Answer:
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.
Answer: I'm pretty sure the answer is Number of Protons
Explanation:
I took the k-12 test
After pollen lands on the stigma of a flower, which of the following happens first?
Help I will give brainlist
lonic bonds tend to form between two atoms with what characteristics?
Answer:Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. The loss or gain of valence electrons allows ions to obey the octet rule and become more stable. Ionic compounds are typically neutral. Therefore, ions combine in ways that neutralize their charges.
Explanation:
Ionic bonds tend to form between two atoms with a high electronegativity difference.
Explanation:
An Ionic bond is defined as a chemical bond in which the complete transfer of electrons occurs from one atom to another.The transfer of electrons occurs from less electronegative atom to highly electronegative atomThe high electronegativity difference between the atomsCompounds with ionic bonds categorized as ionic compoundsSo, from this, we can conclude that ionic bonds tend to form between two atoms with a high electronegativity difference.
Learn more about ionic compounds here:
brainly.com/question/7193259?referrer=searchResults
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Positive ions have ______ (More or Less) protons than electrons.
Answer:
More i think im remembering correctly
Explanation:
How did astronomers use technology to identify characteristics of the Crab nebula? technology that detects ultraviolet light found hydrogen in the nebula technology that detects radio waves identified a pulsar at the center of the nebula technology that detects microwaves revealed the behavior of electrons in the nebula technology that detects gamma rays measured the distance of the nebula from Earth
Answer:
technology that detects radio waves identified a pulsar at the center of the nebula
Explanation:
Crab nebula(M1) is a blob-like patch which is supernova remnants as far as Constellation of Taurus is concerned.
It has apparent magnitude of 8.4 and can only be viewed by telescope. The astronomers make use of technology that detects radio waves, which identified a pulsar at the center of the nebula, this pulsar is a magnetized rotating compact star which is known with it's electromagnetic emissions.
Answer:
technology that detects radio waves identified a pulsar at the center of the nebula
Explanation:
Look at the chemical equation below.
2N2 + O2 2N2O
How many Nitrogen molecules are present? ___________
How many Oxygen molecules are present? ___________
How many N2O molecules are present? ___________
The molecules of Nitrogen, oxygen, and N₂O are 2, 1, and 2 respectively.
What is the chemical equation?A chemical equation can be defined as the expression of a chemical reaction in terms of the chemical symbols of the substances. A chemical equation has reactants, formed products, and an arrow indicating the direction of the reaction.
The equation in which the number of atoms of each element is equal on either side of the chemical equation of a reaction is called a balanced chemical equation.
According to the law of mass conservation, the total mass of the elements on the reactant side should be equal to the total mass of elements on the product side.
Given, the chemical equation of the reaction of nitrogen ad oxygen gas can be written as:
2N₂ + O₂ → 2N₂O
The number of molecules of Nitrogen gas is 2 and the molecules of oxygen gas are one and the molecules of N₂O are equal to 2.
Learn more about the chemical equation, here:
brainly.com/question/28294176
#SPJ3
o
0
8
oo
is this how mitosis works?
Please give real answers, brainliest to best
Answer:
Pretty much, yes!
Explanation:
The cell starts like this: o
First, the DNA inside the cell replicates and condenses into chromosomes. The also gathers all the materials necessary to divide and duplicates some organelles. (represented by 0)
Then the chromosomes pair up and are pulled to opposite poles of the cell. Then, the membrane pinches (invaginates) in in preparation to make two cells (8).
Then, cytokinesis occurs, when the cytoplasm splits and two new cells are formed (oo)
This is a science question. What is the skateboarder’s acceleration?
Answer:
2.4
Explanation:
Divide 7.0 by 3.0 you get 2.333333 then round it of to 2.34
Isopropyl alcohol is a liquid with a density of 0.785 g/cm^3. How much volume would be taken up be 50.0 grams of isopropyl alcohol
Answer:
63.94 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{50}{0.785} \\ = 63.694267...[/tex]
We have the final answer as
63.94 cm³Hope this helps you
When fossil fuels, such as gasoline, are burned, they create smoke. Smoke is best described as a heterogeneous mixture of solid particles from the burning fuel dispersed in a gas – usually air. Smoke can be described more specifically as a suspension. What will most likely happen over time to smoke in the atmosphere? The solid particles will spread out and dissolve. The particles will eventually come together in a cloud and produce rain. Over time, the solid particles will settle on whatever is outside. The particles will remain mixed in the air.
Answer:
Over time, the solid particles will settle on whatever is outside."
Explanation:
Answer:
C
Explanation:
How many atoms are in 3CaCO3
Answer:
15
Explanation:
3 Calcium
3 Carbon
9 Oxygen
4. One of the most common predation relationships that can be seen in the Florida Everglades is between the Florida
Panther and the White Tailed Deer. Since the Florida Panther is an endangered species, what would happen to the
deer population as the panther population decreases in size?
A. The deer population would decrease.
B. The deer population would not be affected.
C. The deer population would increase indefinitely.
D. The deer population would increase and then level off.
Answer:
D
Explanation:
It would be D because it would increse yes in population because the panthers are decreasing and attacking less. But, it would still level off because there are other predators who can kill the white tailed deer. Also the panther who is endangered could still atack even though theres just a few left that does not affect them from attacking. So it would increase but it would still level off.
If a star has a higher apparent magnitude, what does that mean? A low apparent magnitude?
What happens to the dry ice after sometime?
Answer:
As a rough rule, five pounds of dry ice will turn from a solid to a gas in 24 hours. It's best to pick up the block of ice just a few hours before your party so it's as frozen as possible when the bash starts.
Explanation:
what is the temperature of the liquid at vaporization (boiling/condensing)?
What type of bond (Ionic, Covalent or metallic) would be created when titanium bonds with chlorine?
(electronegativity values Ti = 1.54 Cl = 3.16)
Answer:
Covalent
Explanation:
Titanium on reaction with chlorine forms Titanium tetra chloride(TiCl4).
Titanium holds strong covalent bond with chlorine in TiCL4
PLS ANSWER FAST!!! HURRY I NEED THIS ASAP!!
Which statement about chemical reaction rates is true?
The reaction rates cannot change.
The reaction rates can increase.
The reaction rates are always constant.
The reaction rates cannot decrease
Answer:
The reaction rates cannot charge
Explanation:
Answer:
The answer is B
Explanation:
hEy PeEpS!! SEED HALP!!will give da crown to someone u-u
Answer:
D
Explanation:
This answer is correct; if you want you can use context clues, the middle two are not benefits, the first one is just absurd, so the only other logical answer id D. Also, its true.
The middle two are negative, and therefore cannot be benefits no matter how they are looked at.
For an explanation of the first answer and why it's wrong, read the comments.
help pls I will give brainliest!
Answer:
The answer is D, I would type it out but it is to long and I'm kind of lazy, but anyways! Your answer is D
Hope This Helps!
Harry dissolved 9.36 g sample of LiOH into water in a calorimeter. The temperature of the calorimeter rose from 36.9 degrees Celsius to 52.8 degrees Celsius. The heat capacity of the calorimeter and its contents is 639 J/ degC. What is the enthalpy for the solution process if Harry repeats the lab again and 2.85 mol of the LiOH was dissolved? Given: the molar mass of LiOH is 23.95 g/mol
Answer:
did u get the answer?
Explanation: