Please help!
Explain how the Gray Wolf is a keystone species in the Yellowstone
National Park ecosystem.
Wolves are a censerious(critical) keystone species in a healthy ecosystem. By regulating prey populations, wolves authorize(enable) many other species of plants and animals to flourish. Without predators, such as wolves, the system fails to support a natural level of biodiversity.
If an atom has 7 valence electrons, what will its charge be when it becomes an ion?
Answer:
Well, he needs to take one more electron to have a stable structure. And by doing that the atom will have more electrons than protons and will turn into a negative ion.
Please help!! The answer that shows work and does not send link will get brainiest!
Answer:
5 mol H₂. this is the answer bro all the best for your test/exam
PLEASE HELP No links or fake answers or ill report you and every question you have ever answered to getnur acc deleted. I have no idea how to shower these. Ty if you help and I will give brainliest and like and 5 stars. xx
Answer:
!dk bestie i tried to do it but i cant maybe someone else can figure it or they already did :( anyway i hope you have a amazing day luv <3
Where are Gold, Limestone and kaiolin found.
3. Ca(OH)2 + 2HCI = Cacl. + 2HO
If you start with 29.0 grams of Ca(OH), and 12.5 grams of HCl how many moles of water can be formed? What is the limiting reagent?
Answer:
https://download.cnet.com/1-Click-Answers/3000-2378_4-10060189.html
Explanation:
how atoms form chemical bond discuss in detail
Answer:
Atoms form chemical bonds to make their outer electron shells more stable. An ionic bond, where one atom essentially donates an electron to another, forms when one atom becomes stable by losing its outer electrons and the other atoms become stable (usually by filling its valence shell) by gaining the electrons.
Which statement about alkane molecules is correct?
A They burn in oxygen.
B They contain carbon, hydrogen and oxygen atoms.
They contain double bonds.
D They contain ionic bonds.
Answer:
B
Explanation:
B
Which of the following is true concerning methane?
1)It is a gas at standard temperature and pressure.
2)It consists of one carbon atom and four hydrogen atoms.
3)It is the major component of natural gas.
4)all of the above
Answer:
4
Explanation:
at room temperature and standard pressure methane is a colourless gas. Methane consist of one carbon atom bonded to 4 hydrogen atom and it also forms the major percentage of natural gas
Regarding methane, it is true that:
It is a gas at standard temperature and pressure. It consists of one carbon atom and four hydrogen atoms. It is the major component of natural gas. All of the aboveLet's consider which of the following is true concerning methane?
1) It is a gas at standard temperature and pressure. TRUE. Like most small hydrocarbons, methane is a gas at STP.
2) It consists of one carbon atom and four hydrogen atoms. TRUE. The chemical formula of methane is CH₄.
3) It is the major component of natural gas. TRUE. It represents about 95 mole % of natural gas.
4) All of the above. TRUE.
Regarding methane, it is true that:
It is a gas at standard temperature and pressure. It consists of one carbon atom and four hydrogen atoms. It is the major component of natural gas. All of the aboveLearn more: https://brainly.com/question/2127750
number 2 ...............
8.
What domain does column A represent?
Archaea
Eukarya
Bacteria
Euryarchaeota
True or false: The Earth's rotation causes the winds to curve.
Answer:
true
Explanation:
1. How many grams are in 1.7 x 10^23 particles of Cl2?
2. How many moles are in 3.28 x 10^23 atoms of NaCl? *
3. If I were to determine how many liters 26 grams of water is, what type of conversion would this be? *
A Mass --> Moles --> Particles
B Mass --> Moles --> Volume
C Volume --> Mass --> Moles
D Moles --> Mass --> Volume
Answer: 1. 20.0 grams
2. 0.272 moles
3. B) Mass --> Moles --> Volume
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text{Avogadros number}}[/tex] or
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] or
Putting in the values we get:
1. [tex]\text{Number of moles of} Cl_2=\frac{1.7\times 10^{23}}{6.023\times 10^{23}}=0.282moles[/tex]
Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=0.282mol\times 71g/mol=20.0g[/tex]
2. [tex]\text{Number of moles of NaCl}=\frac{3.28\times 10^{23}}{2\times 6.023\times 10^{23}}=0.272moles[/tex]
3. [tex]\text{Number of moles of water}=\frac{26g}{18g/mol}=1.44moles[/tex]
Volume of water =[tex]moles\times {\text {Molar volume}}=1.44mol\times 22.4L/mol=32.4L[/tex]
What is the temperature
Answer:
I think it mught be 12.9?
Answer:
the average sum of kinetic energy of all the molecules present in a body is called temperature. it's 12.9
hope it is helpful to you
Calculate the value of Key in the following reaction if the equilibrium concentrations are
[H2S] -0.25 M, (H2) - 0.88 M, [S2] -0.44M.
2 H2Sig) = 2 H2(g) + S218)
Answer:
The value of the equilibrium constant Kc is 5.45
Explanation:
The "Law of Mass Action" states:
"For a reversible reaction in chemical equilibrium at a given temperature, it is true that the product of the concentrations of the products raised to the stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is a constant."
This constant was called the equilibrium constant. For a reaction:
aA + bB ⇄ cC + dD
the equilibrium constant Kc is:
[tex]Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }[/tex]
In this case, the balanced reaction is:
2 H₂S → 2 H₂ + S₂
So, the equilibrium constant Kc is:
[tex]Kc=\frac{[H_{2} ]^{2} *[S_{2} ] }{[H_{2} S]^{2} }[/tex]
The equilibrium concentrations are
[H₂S] =0.25 M[H₂]= 0.88 M[S₂]= 0.44MReplacing in the definition of equilibrium constant:
[tex]Kc=\frac{(0.88 M)^{2} *0.44 M }{(0.25 M)^{2} }[/tex]
Solving:
Kc= 5.45
The value of the equilibrium constant Kc is 5.45
For her science project, Suzanne made an animal cell using a rectangular
shoe box, pipe cleaners, and construction paper. One comment that the
teacher made was that Suzanne should not have used a shoe box. Why did
the teacher make this comment? *
Answer:
Animal cells are more round and do not have a rigid cell wall.
Explanation:
Hyperthermus butylicus is an aquatic prokaryote found near the coast of Portugal. It is found sand along the gas vents that release steam and carbon dioxide. In what domain would scientists classify this prokaryote?
A Eukarya
B Bacteria
C Archaea
D Fungi
Question is in picture
Using the periodic table, choose the more reactive nonmetal.
Te or o
can some one help whith these
Answer:
what is this pdf I cannot see your question
How many moles are in 46.7g of H2O gas?
2 . how many moles are present in a 12.65g of potassium(k)?
Answer:
0.324 mol
Explanation:
Mass of one mole or atomic mass of potassium is 39 g. Thus, number of moles in 12.65 g of potassium is 0.32 moles.
What is atomic mass?Atomic mass of an element is the mass of one mole of that element. One mole of an element contains 6.022 × 10²³ atoms. This number is called Avogadro number.
Potassium is 19th element n periodic table. It is an alkali metal in the first group. The atomic mass of potassium is 39 g/mol. This is the mass of one mole of potassium. The chemical symbol of potassium is K.
Given mass of potassium = 12.65 g
atomic mass = 39 g/mol
number of moles in 12.65 g = mass/ atomic mass
no.of moles = 12.65 /39 = 0.32 moles.
Therefore, the number of moles of 12.65 g of potassium is 0.32 moles.
Find more on atomic mass:
https://brainly.com/question/17067547
#SPJ2
The fictional element “Nt” contains atoms with two valence electrons. Which type of intermolecular force is most likely responsible for the properties of NtF2?
O dipole-dipole forces
O ion-ion forces
O hydrogen bonding
O dispersion forces
Can plants and animals adapt more easily to slow environmental changes or fast environmental changes? Explain.
A. None of the other answer choices
B. Fast changes, because they weed out weak organisms
C. Fast changes, because species prefer to adapt quickly
D. Slow changes, because they give species time to adapt
2..Which trait would likely help an organism survive in a cold environment so it can reproduce offspring?
Responses
A. A good sense of smell
B. Layers of fat
C. Strong legs
D. Large ears
Answer:
D
Explanation:
How many grams are in 0.35 moles of C2H4? please show dimensional analysis
Answer:
9.8g
Explanation:
Using periodic table find molar mass of C and H:
C=12.01g/mol
H=1.008g/mol
Molar mass of C2H4=(12.01)2+(1.008)4=28.03g/mol
Using molar mass times moles of the chemical to find the mass in 0.35 moles of c2h4:
28.03 x 0.35=9.8grams
How can you Weigh more on the earth than you would on the moon and still have the same mass in both places.
Answer:
Your Mass never changes but your weight can..
Explanation: This all depends on gravity..
Answer:
its because of gravity your mass doesn't change but the gravity does and the gravity from earth and on the moon is way different.please choose me as brainliestWhat is one thing that is the same about a mole of sodiums and a mole of carbons?
A) The weight
B) All of these
C) The total number of atoms
D) The mass
How many moles of H2 can be made from the complete reaction of 1.5 moles of Al? Given: 2 Al + 6 HCl → 2 AlCl3. + 3 H2
Answer:
2.25 mol H₂
Explanation:
To calculate mol of H₂ ensure that the equation is balanced. Then use the equation and dimensional analysis to convert the given 1.5 mol Al to mol of H₂.
True/False: Energy can’t be created or destroyed: it can only be transferred from one place to another.
Answer:
true
Explanation:
Answer:
True.
Explanation:
It is true that energy cannot be made or lost, but it can move. For example, if you touch a metal pole and get a static shock, then the energy from the pole is being transferred to you. However, energy was not made or lost in the process. So, energy cannot be made or destroyed, but it can be moved. This also means there was the same amount of energy in the universe as there was millions of years ago. Hope this helps!
How many chlorine atoms are there in 100 g of carbon tetrachloride
Answer:
1.566x10²⁴ atoms of Cl
Explanation:
In Carbon tetrachloride, CCl₄, you have 4 moles of Cl per mole of CCl₄. To solve this question we must find the moles of CCl₄ in order to find the moles of Cl. Using Avogadro's number we can solve the chlorine atoms:
Moles CCl₄: 153.82g/mol
100g * (1mol / 153.82g) = 0.65 moles CCl₄
Moles Cl:
0.65 moles CCl₄ * (4 moles Cl / 1mol CCl₄) = 2.6 moles Cl
Atoms Cl:
2.6 moles Cl * (6.022x10²³ atoms / mol) =
1.566x10²⁴ atoms of Cl