Answer:
D. 2.5 x 10 ^-14 Hz
Explanation:
Use wavelength formula: v = f x wavelength
Rearrange formula for frequency.
f = wavelength / v
f = 7.6 x 10 ^-6 / 3.00 x 10 ^8
f = 2.5 x 10^-14 Hz
What might happen if an octopus we're chased by a predator
Answer:
They will try to defend themselves
Explanation:
Answer:
octopuses will shoot a dark liquid, sometimes called ink, at the thing that scared them. ... If an octopus does get caught — no problem. They can lose arms and regrow them.
Explanation:
help please place the ph test papers I️n order from most acidic to most alkaline
Answer:refer to the image below
How many ml of solution are needed to make a 5.78 M solution with 2.98 moles of CaO?
Answer:
515.6 mL
Explanation:
Please see the step-by-step solution in the picture attached below.
Hope this answer can help you. Have a nice day!
The number of mL of the solution needed to make a 5.78 M solution with 2.98 moles of CaO is 516 mL.
The number of moles that is present in a liter of solution is regarded to be the Molarity of the solution that is measured in mol/L.
[tex]\mathbf{Molarity = \dfrac{number\ of \ moles(n)}{Volume \ (in \ liters)}}[/tex]
[tex]\mathbf{Molarity = \dfrac{2.98 moles }{5.78 \ mol/ L}}[/tex]
Molarity = 0.51557 L
If 1 Liter of solution contains 1000 mL, then 0.51557 L will contain:
= 0.516 × 1000 mL
= 516 mL of solution.
Therefore, we can conclude that the number of mL of the solution needed to make a 5.78 M solution with 2.98 moles of CaO is 516 mL.
Learn more about solutions here:
https://brainly.com/question/1616939?referrer=searchResults
Which statements describe an ideal gas
Answer:smoke
Explanation:smoke is a gas
What animals are in the Arctic Tundra?
Answer:
Polar Bears
Arctic Foxes
Seals
Penguins
They all live in the cold, so they all must live in the Arctic Tundra ;)
Answer:
Animals such as polar bears, arctic wolves, and arctic foxes live in the Arctic Tundra.
Scientists classify the parts of a phospholipid molecule according to their chemical properties. What are these parts? an acidic head and basic tails hydrophilic tails and a hydrophobic head a hydrophilic head and hydrophobic tails acidic tails and a basic head
Answer: hydrophilic head and hydrophobic tails
Explanation:
A phospholipid consists of glycerol molecule, 2 fatty acids, and 1 phosphate group that is replaced by alcohol. In the phosphate group the polar head is negatively charged and hydrophilic in nature, whereas the fatty acid chain is nonpolar tails, that are hydrophobic. The tails are hydrophobic which face the inside and away from water.
Answer:
hydrophilic head and hydrophobic tails
7. As the temperature of a fixed volume of a gas increases, the pressure will
Ovary inversely
O increase
O decrease
O not change
Answer:
increase
Explanation:
Please see the step by step explaination in the pictured attached below.
PLEASE HELP!
The element (AI) is outlined in red on the periodic table.
Which period number is aluminum?
Which group number is aluminum in?
Answer:
period 3 and group 3
Explanation:
I'm saying group 3 because that is how I learnt it at school, but if you count it then it's in group 13.
What might happen if you got too close to the center of the Milky Way galaxy?
AYou would be burned up by the galaxy's brightest stars. incorrect answer
BYou would be spun outwards toward the edge of the galaxy. incorrect answer
CYou would be trapped in the gravitational pull of a black hole. incorrect answer
DYou would find yourself traveling faster than the speed of light.
Answer:
you would be trapped in the gravitational pull of a black hole
Explanation:
there is a black hole in the center of the galacy
Which of the following best expresses the definition of a closed system? (2 points) Energy can enter or leave the system but matter cannot. Heat and matter are both able to enter or leave the system. Matter can enter or leave the system but energy cannot. Heat and matter can enter the system but cannot leave the system.
In the hydrolysis of ethyl ethanoate, what will happen when the reaction is catalysed by an alkali?
Answer:
That is exactly what happens when esters are hydrolysed by water or by dilute acids such as dilute hydrochloric acid. The alkaline hydrolysis of esters actually involves reaction with hydroxide ions, but the overall result is so similar that it is lumped together with the other two.
Explanation:
5. Do you think oppositional or symbiotic relationships are more beneficial to an ecosystem? Justify
your answer.
Answer:
I think they are beneficial for the life of those symbiotic organisms that require yes or yes from another to be able to live.
Although an ecosystem could not be carried out if only this relationship would occur, since symbiotic relationships we have an organism where it needs another to live and even removes the necessary nutrients for it, that is why the chain should continue with other types of relationships .
Explanation:
The symbiosis is defined as "Intimate association of organisms of different species to mutually benefit in their vital development" that is why adequate coexistence between these living organisms is needed, otherwise this phenomenon would not occur.
A very good example of the symbiosis is: Bees and plants where the bee is the pollinating agent of the plant so that it continues to reproduce and the plant is the bee's food source.
Therefore I believe that the development of this type of relationship is VITAL, and very fundamental, otherwise I do not know if an ecosystem or a balanced ecosystem could be carried out.
example of a neutral mutation?
a frog born with white skin
a person's inability to break down sugar
a red flower with one part colored yellow
The answer is D
Explanation: A RED FLOWER WITH ONE PART COLORED YELLOW
Answer:
D.a red flower with one part colored yellow
Explanation:
edg2020
the volume of one mole of a substance is 22.4 L at STP for all what
Answer:
The molar volume of a gas is the volume of one mole of a gas at STP. At STP, one mole (6.02 × 1023 representative particles) of any gas occupies a volume of 22.4 L (Figure below). A mole of any gas occupies 22.4 L at standard temperature and pressure (0°C and 1 atm).
Explanation:
What are the two major political parties in the United States, now?
Democrats and Republicans
It is best to say that electric motors require _______ to work. a. a continuous current b. a galvonometer c. a generator d. energy
Which ion H₃O⁺ or OH⁻, is in greater concentration?
Answer:
The OH- ion concentration is greater than the H3O+ ion concentration.
Explanation:
What force keeps protons and neutrons together?
A. Nuclear Force
B. Electromagnetic Force
C. Proton Force
D. Subatomic Force
Answer:
A)Nuclear Force
Explanation:
Its answer is Nuclear Force keeps protons and neutrons togeather.
What do ionic bond and covelant bond have in common?
A) Both types of bond involve only one electron
B) both type of bonds involve valance electrons
C) electrons are transferred from one atom to another in both types of bonds
D) Electrons are shared between atoms in both types of bonds
Answer:
C) electrons are transferred from one atom to another in both types of bonds
Explanation:
Balance the following reaction CS2+Cl2. CCl4+S2Cl2
Answer:
CS₂ + 3Cl₂ ⇒ CCl₄ + S₂Cl₂
Explanation:
This one is relatively simple. When we take inventory of both sides, we see 1 Carbon, 2 Sulfurs, and 2 Chlorines on the reactant side, and 1 Carbon, 2 Sulfurs, and 6 Chlorines on the product side. Since we have Cl₂ on the left and we want 6 on the left, let's add a coefficient of 3 to Cl₂. This balances everything out! Final answer: CS₂ + 3Cl₂ ⇒ CCl₄ + S₂Cl₂. Hope this helps!
if you had a neurological disorder affecting your thermoreceptors what symptom would you experience??
quick answers pleasee
Answer:u got me stumped
Explanation:
the particle picture is best described as...
an element
an atom
a compound
a pure substance
both a pure substance and a compound
Answer:
Both are pure substances and a compound
List some common liquids that you think are acidic or basic. For example, do you think orange juice is acid or base? Why do you think each liquid is an acid or base?
James developed a plan to find the percent composition of the compound KClO3. His first step was to find the mass of the individual elements. He found the individual element molar masses by using A) a balance B) a calculator C) a periodic table D) a graduated cylinder
Answer:
C) periodic table
Explanation:
Answer:
c
Explanation:
cmon its so obvious
Data
Record your data either in your lab notebook or in the space below.
Time
Radioactive Atoms
0.5"
Half-Life
Minutes
Predicted
Simulated
Cycles, n
Acted out
0.0
100
Initial = 0
100
1
100
0.5
1
2.
1.0
1.5
3
2.0
4
2.5
5
3.0
6
3.5
7
4.0
8
id
Answer:
The 2nd one
Explanation: U answered yourself on the second one
Answer: I don't have the last column though.
Explanation:
5 uL of a solution is equal to
how many nanoliters?
Answer:
5000 nL
Explanation:
Answer: 5000 nL
Explanation:
which statement about valence electrons is true?
A) they are located in the outer energy level of an atom
B) they are potentially involved in chemical reactions
C) they determine whether an element can conduct electricity
D) all of the above
Answer:The number of electrons in an atom's outermost valence shell governs its bonding behavior. Therefore, elements whose atoms can have the same number of valence electrons are grouped together in the periodic table of the elements
Explanation: B
it's D because the are located in the outer most shell, they are responsible for the chemical reaction and determine if they conduct electricity or not, you can look it up if you don't believe me
what kind of nuclear reaction is seen in the picture above? A.Nuclear Fission
B.Alpha Decay
C.Nuclear Fusion
D.Beta Decay
PLEASE ANSWER ASAP
Answer: Nuclear Fission
Answer:
Beta Decay
Explanation:
1. A solution was made by dissolving 0.837g of Ba(OH)2 in 100 mL of solution. What is the pOH and pH of the solution?
2. What is the percentage ionization of 1.0M acetic acid? What is the pH of this solution?
Answer:
1. pOH = 1.01 and the pH = 12.99.
2. a) %I = 0.417 %, b) pH = 2.34.
Explanation:
1. The pH of the dissolution of Ba(OH)₂ in water can be calculated using the following equation:
[tex]pH = 14 - pOH = 14 - (-log[OH^{-}]) = 14 + log[OH^{-}][/tex]
To find the pOH, first, we need to calculate the concentration (C) of Ba(OH)₂:
[tex] C_{Ba(OH)_{2}} = \frac{\eta}{V} = \frac{m}{M*V} [/tex]
Where:
η: is the number of moles of Ba(OH)₂
V: is the volume of the solution = 100 ml = 0.100 L
M: is the molar mass of Ba(OH)₂ = 171.34 g/mol
m: is the mass of Ba(OH)₂ = 0.837 g
[tex] C_{Ba(OH)_{2}} = \frac{m}{M*V} = \frac{0.837 g}{171.34 g/mol*0.100 L} = 0.049 mol/L [/tex]
Knowing that in 1 mol of Ba(OH)₂ we have two moles of OH⁻, the concentration of OH⁻ is:
[tex] C_{OH^{-}} = \frac{2*\eta_{Ba(OH)_{2}}}{V} = 2*C_{Ba(OH)_{2}} = 2*0.049 mol/L = 0.098 mol/L [/tex]
Now, we can find the pOH and the pH of the solution:
[tex] pOH = -log[OH^{-}] = -log(0.098) = 1.01 [/tex]
[tex] pH = 14 - pOH = 14 - 1.01 = 12.99 [/tex]
2. a) The percentage of ionization (% I) of acetic acid can be calculated using the following equation:
[tex]\% I = \frac{[H^{+}]_{eq}}{[HA]_{0}}*100[/tex]
We need to find the [H⁺] = [H₃O⁺] at the equilibrium:
CH₃COOH(aq) + H₂O(l) → CH₃COO⁻(aq) + H₃O⁺(aq)
1.0 - x x x
[tex] Ka = \frac{[CH_{3}COO^{-}]*[H_{3}O^{+}]}{[CH_{3}COOH]} [/tex]
Ka: is the dissociation constant of acetic acid = 1.75x10⁻⁵
[tex] 1.75\cdot 10^{-5} = \frac{x^{2}}{1.0 - x} [/tex]
[tex] 1.75\cdot 10^{-5}(1.0 - x) - x^{2} = 0 [/tex] (1)
By solving equation (1) for x we have two solutions:
x₁ = -0.00417
x₂ = 0.00417 = [H₃O⁺] = [CH₃COO⁻]
We will take the positive value to find the percentage ionization:
[tex]\% I = \frac{[H^{+}]_{eq}}{[HA]_{0}}*100 = \frac{0.00417 M}{1.0 M}*100 = 0.417 \%[/tex]
b) The pH of the solution is:
[tex] pH = -log([H_{3}O^{+}]) = -log(0.00417) = 2.34 [/tex]
I hope it helps you!
how many molar mass are in k0h?
Answer: 105 u
Explanation: