Answer:
The black snakes will survive and reproduce while the orange snakes die out.
Explanation:
The orange snakes will be easier to see by their prey and predators, and therefore will die out while the black snakes thrive because of their camouflage.
Answer:
the black snakes will survive and reproduce, therefore, passing their traits to their offspring, while few orange snakes will remain in the population.
Explanation:
Two closed vessels contain chlorine gas at the same conditions of temperature and
pressure, so if the first vessel whose volume = 1.3 L contains 6.7 mol of gas,
what is the number of moles in the second vessel whose volume = 2.33 L ?
The number of moles : 12.01
Further explanationGiven
V₁ = 1.3 L contains 6.7 mol of gas(n₁)
V₂ = 2.33 L
Required
The number of moles
Solution
Avogadro's : at the same temperature and pressure, the ratio of gas volume will be equal to the ratio of gas moles
[tex]\tt \dfrac{V_1}{V_2}=\dfrac{n_1}{n_2}[/tex]
[tex]\tt \dfrac{1.3}{2.33}=\dfrac{6.7}{n_2}\\\\n_2=12.01[/tex]
How many atoms of hydrogen are there in 18g of water ?
Answer:
They are 1.204×10^24 atoms of hydrogen present in 18 grams of water. In order to calculate this,it is necessary to compute the number of hydrogen moles present in the sample.
Getting a vaccine is safer than taking medication or undergoing surgery. True or false I
Answer:
True; you really think getting surgery is safer than getting a tiny shot? I think not.
What is the electron configuration for 1s2 2s2 2p6 3s2 3p6
What happens to the temperature of a substance during a change of state?
Answer:
The smallest scale division is a tenth of a centimeter or 1 mm
Explanation:
a sample of gas has a pressure of 742 torr. What is the pressure in atmospheres?
Answer:742 torr= approximately 0.976 atm
Explanation:
Since we know that one atm= 760 torr, we can compute the following calculation:
(742 torr/1)*(1atm/760torr)=0.976316 atm
Remember sig figs (3) to round it to 0.976 atm
[tex]\frac{742 torr}{1}[/tex]*[tex]\frac{1 atm}{760 torr}[/tex]=0.976316=0.976 atm
(torr cancels out and we're left with atm)
Hope this helps :)
When barium becomes positively charged, it forms a(n): (2 points)
cation
O anion
proton
O compound
Barium forms cation : Ba²⁺
Further explanationGiven
Barium element
Required
Ion type
Solution
Barium with the symbol Ba is an alkaline earth metal element having the atomic number 56
Electron configuration of Barium: [Xe] 6s2
If we look at this configuration, then Barium will try to achieve stability by removing 2 electrons so that the electron configuration is the same as the noble gas Xenon (Xe)
Because it removes 2 electrons, Barium has the number of protons> the number of electrons so that the charge is positive and forms a cation
Suppose that 10.0 L of Carbon Dioxide gas are produced by this reaction, 4C3H5N3O9 -> 12 CO2 + 10H2O + 6N2 +O2, at a temperature of -5 degrees C, and a pressure of exactly 1 atm. Calculate the mass of nitroglycerin that must have reacted in grams.
The mass of nitroglycerin : 34.52 g
Further explanationReaction
4C₃H₅N₃O₉ ⇒ 12 CO₂ + 10H₂O + 6N₂ +O₂
Volume = 10 L
Temperature = -5°C=268 °K
Pressure = 1 atm
mol of CO₂ (ideal gas) :
[tex]\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1\times 10}{0.082\times 268}\\\\n=0.455[/tex]
mol ratio C₃H₅N₃O₉ : mol CO₂= 4 : 12, so mol C₃H₅N₃O₉ :
[tex]\tt \dfrac{4}{12}\times 0.455=0.152[/tex]
mass C₃H₅N₃O₉ (MW=227,0865 g/mol):
[tex]\tt 0.152\times 227.0865=\boxed{\bold{34.52~g}}[/tex]
What is the final volume, in milliliters, when 5.80 mL of 25.0 %(m/v) NaOH solution is diluted to give a 3.50 %(m/v) NaOH solution.
Answer:
41.43 mL
Explanation:
First we calculate the mass of NaOH in the original solution:
25.0 % m/v means that in 100 mL of solution, there are 25 grams of NaOH.This means that in 5.80 mL, we would have (5.80 * 25/100) 1.45 grams of NaOH.Then we calculate the volume of the diluted solution, using the grams of NaOH (that remain the same throughout the dilution process):
1.45 g NaOH * [tex]\frac{100 mL}{3.50gNaOH}[/tex] = 41.43 mLHelp plz:))) I’ll mark u brainliest ASAP 10 points
Which family of elements always forms ions with a charge of -1 in compounds ?
Answer:
halogens
Explanation:
Answer:
halogens
Explanation:
PLEASE MARK ME AS BRAINLIEST
Which system of measurement do scientists use?
metric
customary
Answer:
metric
Explanation:
how one atom undergoing fission can cause up to three other atoms to undergo fission.
Answer:
In order to initiate most fission reactions, an atom is bombarded by a neutron to produce an unstable isotope, which undergoes fission. When neutrons are released during the fission process, they can initiate a chain reaction of continuous fission which sustains itself.
How many grams of AgNO3 are needed to prepare a 75.00 mL solution that is 6.5% (m/v)?
Answer:
Volume of AgNO₃ = 4.9 ml (Approx)
Explanation:
Given:
Total solution = 75 ml
Volume of AgNO₃ = 6.5%
Find:
Volume of AgNO₃
Computation:
Volume of AgNO₃ = Total solution x Volume of AgNO₃
Volume of AgNO₃ = 75 x 6.5%
Volume of AgNO₃ = 4.875
Volume of AgNO₃ = 4.9 ml (Approx)
Consider a cup of hot tea, a cup of juice at room temperature, and a cup of ice water. Which beverage has the highest average kinetic energy?
Question 2 options:
A)
All liquids have the same average kinetic energy.
B)
A cup of hot tea
C)
A cup of ice water
D)
A cup of juice at room temperature
Answer:
I’m guessing a Or c
Explanation:
Answer:
B)
A cup of hot tea
Explanation:
Because temperature of hot tea is higher than others
And kinetic energy is directly proportional to temperature.
NEED HELP ASAP!!!!!!
What would be the three amino acids that correspond to the mRNA sequence: GGACACCCG
Question 1 options:
arg, ser, pro
glu, pro, his
gly, his, pro *********
pro, his, pro
Why doesn't glue stick to the inside of the bottle? (Not sure if this is chemistry or not lol)
Answer:
When white glue is in the bottle, there's not enough air inside the bottle to cause the water to evaporate to make the glue sticky. Basically, the bottle holds the glue from the air and keeps the glue from going everywhere.
Based on the molar mass of LiCl (42.39 g/mol) and on the count of the ions inside the unit cell, what is the mass (in grams) of LiCl is in a unit cell.
Answer:
This question appear incomplete
Explanation:
This question appear incomplete because of the absence of the value of the count of the ions inside the unit cell. To determine the mass (in grams) of LiCl in a unit cell, the formula below can be used
count of ions inside the unit cell = mass of LiCl ÷ molar mass of LiCl
Hence,
Mass of LiCl = count of ions inside the unit cell × molar mass of LiCl
Count of ions (Li⁺ and Cl⁻ ions specifically) inside the unit cell should have been provided in the question
Molar mass of LiCl was given to be 42.39 g/mol
The mass of the LiCl unit cell has been 2.82 [tex]\rm \bold{\times\;e^-^2^2}[/tex] grams.
The given structure has been the unit cell of the LiCl having 4 atoms of Li and 4 atoms of Cl.
The number of Li and Cl in a molecule of LiCl has been 1, and 1 respectively.
The presence of 4 atoms of Li and Cl indicates that there has been the presence of 4 molecules of LiCl.
The molar mass ofLiCl = 42.39 g/mol.
The number of molecules present in a mole of the sample has been equivalent to the Avagadro number.
6.023 [tex]\rm \times\;10^2^3[/tex] molecules = 1 mole LiCl.
6.023 [tex]\rm \times\;10^2^3[/tex] molecules = 42.39 grams LiCl.
The mass of 4 molecules of LiCl has been:
4 molecules = [tex]\rm \dfrac{42.39}{6.023\;\times\;1^2^3}\;\times\;4[/tex]
4 molecules = 2.82 [tex]\rm \times\;10^-^2^2[/tex] grams
2.82 [tex]\rm \times\;10^-^2^2[/tex] grams = 2.82 [tex]\rm \bold{\times\;e^-^2^2}[/tex] grams.
The mass of the LiCl unit cell has been 2.82 [tex]\rm \bold{\times\;e^-^2^2}[/tex] grams.
For more information about the mass of a unit cell, refer to the link:
https://brainly.com/question/14020091
Explain your observations. What did you observe as time passed in each can of liquid? Did you see a significant change in temperature? Why or why not? Submit your data chart here.
Answer:
Hey there.. the question is not proper. Please give the whole question
This diagram is of an amniote egg.
What is the correct label for A in this diagram?
embryo
zygote
amnion
placenta
Answer:
amnion
Explanation:
Answer: amnion
Explanation:
Yvette mixed together water with calcium chloride in a beaker. She noticed that the temperature changed from 21oC to 37oC. She also noticed small solids starting to form in the beaker.
What type of change occured? Explain how you know.
Answer:
The temperature changed
Mercury completes one orbit around the Sun in 68 days.
a. True
b. False
Answer:
true :PP
Explanation:
Hypothetical element X has 3 stable isotopes. The relative peak intensities are 79.52 for 180.0 u, 100.0 for 184.0 u, and 82.98 for 186.0 u. What is the average atomic mass for X
Answer:
The relative atomic mass of X is 183.4
Explanation:
The relative atomic mass of an element is the weighted average of the masses of the isotopes using the carbon-12 atom has a mass of exactly 12 units as as a standard.
The relative sizes of the peaks gives a direct measure of the relative abundances of the isotopes. The tallest peak is often given an arbitrary height of 100 and is known as the base peak.
To calculate the relative atomic mass of the element X which has 3 stable isotopes with the relative peak intensities as given below:
79.52 for 180.0 u, 100.0 for 184.0 u, and 82.98 for 186.0 u, the sum of the products of the relative peak intensity of each isotope and their isotopic mass is divided by the sum of the peak intensities.
Relative atomic mass of X = (79.52 × 180) + (100 × 184.0) + (82.98 × 186)/(79.52 + 100 + 82.98)
Relative atomic mass of X = (14313.6 + 18400 + 15434.28)/(262.5)
Relative atomic mass of X = 48147.88/262.5 = 183.4
Therefore, the relative atomic mass of X is 183.4
The average atomic mass of element X has been 183.42 amu.
The average atomic mass of the element has been given with the abundance and the atomic mass of the isotopes present.
The average atomic mass (amu) has been given as:
[tex]amu=\dfrac{(am\;\times\; \rm \% abundance)_1\;+\;(\textit am\;\times\;\% abundance)_2\;+\;(\textit am\;\times\;\% abundance)_3}{\sum abundance}[/tex]
Where, atomic mass and abundance of isotope 1, has been [tex](am\;\times\; \rm \% abundance)_1=(79.52\;\times\;180)\;\rm u[/tex]
The atomic mass and abundance of isotope 2, has been [tex](am\;\times\; \rm \% abundance)_2=(100\;\times\;184)\;\rm u[/tex]
The atomic mass and abundance of isotope 3, has been
[tex](am\;\times\; \rm \% abundance)_3=(82.98\;\times\;186)\;\rm u[/tex]
The sum of abundance, has been, [tex]\sum abundance=79.52\;+\;100\;+\;82.98[/tex]
Substituting the values for calculating amu:
[tex]\\amu=\dfrac{(79.52\;\times\;180)\;+\;(100\;\times\;184)\;+\;(82.98\;\times\;186)\;amu}{79.52\;+\;100\;+\;82.98} \\amu=\dfrac{14,313.6\;+\;18,400\;+\;15,434.28}{262.5} \\amu=183.42[/tex]
The average atomic mass of element X has been 183.42 amu.
For more information about atomic mass, refer to the link:
https://brainly.com/question/3187640
The molecule BrF3 has how many lone pairs of electrons on the central atom?
Answer:
2
Explanation:
2 lone pairs on the central atom of BrF3.
Ask BRIA
Water vapor
Liquid water
Which of the following labels should be added to all of the black arrows in the above
illustration?
O temperature increases
O temperature decreases
heat removed
O heat added
Answer:
o temperature increases
Anybody know how I can get the answers from a Y o u t u b e video that’s an hour and 54 mins long without actually watching it?
Distance with respect to time
Answer: okay
Explanation:
Answer:
sure
Explanation:
Imagine you just landed on the moon with a new team of NASA astronauts to explore the moon’s surface. The reference image contains an example of the first sample collected. Using what you have learned about particles, describe this sample. the picture is of a moon rock with a cube with ni on it
Answer:
Hmmmm
Explanation:
Hard,
Rough,
Dusty.
Answer:
This matter is a solid because it has a definite shape and volume and are tightly packed together.
Hope this helps!! <3
it is a type of mixture that separates on standing
A.) solutions
B.) suspensions
C.)colloids
D.) solute
Answer:
B) Suspensions
More to know - In suspension the size of particles are big as compared to solution Colloids shows Tyndall effect (,for ex milk)True or False: Adhesion is the attraction between two different substances
Answer:
true
Explanation:
Adhesion is the attraction of molecules of one kind for molecules of a different kind
Which best describes a stable binary ionic compound?
A stable binary ionic compound refers to two ions with opposite charges and a net charge of zero.
What is stable binary ionic compound?A compound formed by the combination of two different elements which are present in a fixed ratio by mass are known as binary compounds. The given compounds will be result in the formation of following compounds.
A binary ionic compound contains an ion that is a metal (cation) and an ion that is a nonmetal (anion) so we can conclude that A stable binary ionic compound refers to two ions with opposite charges and a net charge of zero.
Learn more about ionic compound here: https://brainly.com/question/2687188
