Answer:
less carbon dioxide can be dissolved in the ocean.
Explanation:
I just need 4-8! Plz hurry!!!!!!!!!!!
Answer:
4: 90N
5: 7.77777m/s
6: 4
7: 12.5609756098
8: 187.5
Explanation:
How are a rainforest and a desert different?
Answer:
Difference between Desert Plants and Rainforest Plants. The deserts are very dry land areas that can be hot or cold and experience very less rainfall. On the other hand, rainforests receive an enormous amount of rain. Both are homes to a variety of plants.
Explanation:
4. Explain how radioactive isotopes are used to detect health problems.
Benzoic acid, HC6H5CO2,is a monoprotic acid(only one H+ ionizes)with a Ka=6.5×10^-5. Calculate [H+] and the pH of a .32M solution of benzoic acid. PLEASE ANSWER.
Answer:
[H⁺] = 4.56x10⁻³ M
pH = 2.34
Explanation:
Hello there!
In this case, according to the ionization reaction of benzoic acid:
[tex]HC_6H_5CO_2+H_2O\rightleftharpoons C_6H_5CO_2^++H_3O^+[/tex]
Whereas [tex][H_3O^+]=[H^+][/tex], we can set up the equilibrium expression in terms of [tex]x[/tex] (reaction extent) to obtain:
[tex]Ka=\frac{[C_6H_5CO_2^-][H_3O^+]}{[HC_6H_5CO_2]} \\\\6.5x10^{-5}=\frac{x^2}{0.32-x}[/tex]
However, since Ka<<<1, we can neglect the [tex]x[/tex] on bottom to easily solve for it:
[tex]6.5x10^{-5}=\frac{x^2}{0.32}\\\\x=\sqrt{6.5x10^{-5}*0.32} \\\\x=4.56x10^{-3}[/tex]
Which is actually the same as [H⁺]. Finally, the pH turns out to be:
[tex]pH=-log(4.56x10^{-3})\\\\pH=2.34[/tex]
Best regards!
Why should we work to protect estuaries? Select all that apply.
PLSSSS
Answer:
1, 3, and 4
Explanation:
I'm guessing, but those make the most sense
Answer:
3 and 4
Explanation:
PLEASE PLEASE HELP THIS IS SCIENCE !!
ILL MARK U BRAINLIEST IF UR CORRECT
Answer:
Q 14 Deceleration
Explanation:
You are slowing down
Answer:
Explanation:
question 14 is a
question 15 is c
questoin 13 is d
Your opinion on chocolate
What is your opinion on chocolate, any kind like white chocolate dark, etc. also what do you think is the bad side of chocolate?
Answer:
Milk Chocolate
Explanation:
Some chocolates contain lots of sugar, but for Dark chocolate its healthy
Answer:
Milk chocolate the bad side of chocolate is getting fat
Explanation:
have u ever tried shreks snickers before?
help?? help for mee??? maybe? what if i said...please????
Answer:
c
Explanation:
because they transfer an electron the sodium ion has a positive charge, and the chlorine ion has a negative charge so one gives off positive and one gives of negative
Hannah made a diagram to show how plants make their own food. What should Hannah write to fill in the blank in the diagram?
A)
heat from the soil
B)
energy from the Sun
C)
heat from the roots
D)
energy from the wind
PLS SOME HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP I NEED HELPPPPPPPPPPP
Answer:
Answer: Energy from the sun.
Explanation:
If you look at the hints it says that it needs something else for a plant to grow and what does a plant need?
Air, Water, and energy from the Sun to make food
Hope this helps :)
Answer:
Energy from the sun
Explanation:
1. Cancer is a disease in which cells
a. grow and divide uncontrollably. b. die before they can mature.
c. stop producing DNA. d. die during mitosis.
____ 2. Which of these traits is controlled by a gene with multiple alleles?
a. straight hairline b. smile dimples
c. widow’s peak d. blood type
____ 3. Which of these is an example of the benefits of genetic engineering?
a. cross-breeding to create disease-resistant crops
b. creating human insulin to treat people with diabetes
c. analyzing karyotypes and pedigree charts
d. growing a new plant from a cutting
____ 4. A carrier is a person who has
a. one recessive and one dominant allele for a trait.
b. two recessive alleles for a trait.
c. two dominant alleles for a trait.
d. more than two alleles for a trait.
____ 5. Sex-linked genes are genes on
a. the X chromosome only. b. the Y chromosome only.
c. the X and Y chromosomes. d. all 23 pairs of chromosomes.
______ 6. What is the chromosome theory of inheritance?
a. Chromosomes are carried from parents to offspring on hybrids.
b. Genes are carried from parents to offspring on chromosomes.
c. Hybrid pairs of chromosomes combine to form offspring.
d. Codominant genes combine to form new hybrids.
____ 7. How can a mutation affecting skin be harmful to an animal?
a. It can make the animal more visible to its prey or predators.
b. It can cause disease in the animal.
c. It can make the animal resistant to certain diseases.
d. It can make the animal resistant to drugs
______ 8. What happens during meiosis?
a. Two sex cells combine.
b. Chromosome pairs separate and are distributed into new sex cells.
c. Each sex cell copies itself to form four new chromosomes.
d. Chromosome pairs remain together when new sex cells are formed.
Answer:
1. a
2. a.
3. b.
4. a.
5. c.
6. b.
7. a.
8. c.
Explanation:
The following diagram shows a single cell. Is the cell eukaryotic or prokaryotic? Explain your reasoning
Answer:
eukaryotic because it has a nucleus
Explanation:
Which of these do NOT show malleability a) Iron
b) Sulfur
c) Copper
d) Aluminum
Answer:Sulfur
Hope this helps!
Explanation:
What is the pH of an aqueous solution of HCl with a hydrogen ion
concentration of [H+] = 6.7 x 10-6 M? Round your answer to the nearest
hundredth.
Answer:
pH = 5.17
Explanation:
pH = -log[H+] = -log(6.7 x 10^-6) = 5.17
what is the lewis dot structure for ClF (chlorine monofluoride)?
Answer:
Explanation:
.
Waste water from nuclear power plants is generally ?
☁️ Answer ☁️
Waste water from nuclear power plants is generally: radioactive.
Hope it helps.
Have a nice day noona/hyung
Perform the following operation
and express the answer in
scientific notation.
3.60x10-12 + 3.60x10-11
Answer:
3.60X10^-12 is equal to 0.360X10^-11 (move decimal one place left)
Now you can add 3.60X10^-11 and 0.360X10^-11:
3.60X10^-11 + 0.360X10^-11 = 3.96X10^-11
You're really just adding 3.60 to 0.36 since the "X10^-11" is the same for both.
Aliyah found a tarnished silver dollar and recalled that tarnish results when metals react with oxygen or sulfur compounds in the air. She polished the silver dollar to remove the tarnish until it was shiny again. She also polished a copper bracelet and a gold ring. What physical property of these metals makes them shiny?
A. conductivity
B. ductility
C. luster
D. malleability
Answer:
C.
Explanation:
Luster
PLEASE HELP WITH CHEM !! Calculate the [OH-] of each of the following solutions given the [H+]. AND Classify each of the solutions in the question above as either acid, base, or neutral. AND FIND THE PH
pH, pOH, [H+], and [OH-] are all interrelated. For simplicity, we assume that we're working with aqueous solutions at 25 °C.
The following mathematical relations are relevant here:
pH = -log[H⁺]pOH = -log[OH⁻][H⁺] = 10^-pH[OH⁻] = 10^-pOHpH + pOH = 14[H⁺] × [OH⁻] = 10^-14A pH of 7 is neutral; a pH less than 7 is acidic; and a pH greater than 7 is basic.
---
We are given four solutions of varying [H⁺], and we want to find the pH and the [OH⁻]. The pH will tell us whether the solution is neutral, an acid, or a base.
Finding the [OH⁻]Using the relationship [H⁺] × [OH⁻] = 10^-14, we can calculate the [OH⁻] of each solution by dividing 10^-14 by the given [H⁺]:
[OH⁻] = 10^-14/(3.3 × 10^-5) = 3.0 × 10^-10
[OH⁻] = 10^-14/(4.0 × 10^-8) = 2.5 × 10^-7
[OH⁻] = 10^-14/(7.2 × 10^-11) = 1.4 × 10^-4
[OH⁻] = 10^-14/(8.2 × 10^-4) = 1.2 × 10^-11
Note: While not indicated here, the units for [H⁺] and [OH⁻] are moles/liter (M).
Finding the pHTo find the pH of each solution, we take the negative logarithm of the [H⁺] with base 10, i.e., pH = -log₁₀[H⁺]:
pH = -log(3.3 × 10^-5) = 4.48
pH = -log(4.0 × 10^-8) = 7.40
pH = -log(7.2 × 10^-11) = 10.14
pH = -log(8.2 × 10^-4) = 3.09
Note that, for significant figures involving logarithms, the number of decimal places should equal the number of significant figures in the argument of our logarithm (the argument is what we're taking the -log of). Since we're taking the -log of quantities given to two significant figures, our corresponding pH values are given to two decimal places.
Acid, Base, or Neutral?As mentioned above, a pH = 7 is neutral, a pH < 7 is acidic, and a pH > 7 is basic.
4.48 < 7, so the first solution is an acid.
7.40 > 7, so the second solution is a base.
10.14 > 7, so the third solution is a base.
3.09 < 7, so the fourth solution is an acid.
True or false?
A limitinh factor is an environmental factor that increases the growth of a population
True or false?
Biomes are characterized by temperature, precipitation, and the plant and animal communities that live there
Because the triple beam balance is zeroed before it is put into use, it measures
A.
volume
B.
weight
C.
the effects of gravity
D.
mass
How does the environment in which an organism lives determine which traits are adaptations?
can someone plss help me??
Answer:
When an organism lives in a certain environment there is a process called natural selection. Natural selection ensures that the organisms of a species with the best traits suited for an environment will reproduce and pass on those traits to the offspring.
Explanation:
The theory of natural selection was studied by Charles Darwin in The Origin of Species by Means of Natural Selection if you need more information.
El etanol combustiona con el oxigeno produciendo dióxido de carbono gaseoso y agua: En un proceso se hacen reaccionar 450.2 g de dioxígeno con 998. 2 g de etanol . a) ¿Cuál de los reactivos es el limitante? b) Calcule la masa de dióxido de carbono que se formará c) ¿ Cuanto del reactivo en exceso quedará sin reaccionar?
Answer:
uh oh stinky uh oh stinky
2. How many moles are in 2.8 Liters of CO2 gas?
Answer:
0.125 moles
Explanation:
2.8 litres is equivalent to 2.8dm³
At STP,
1 mole = 22.4 dm³
x mole = 2.8 dm³
Cross multiply
22.4x = 2.8
Divide both sides by 22.4
x = 2.8/22.4
x = 0.125
calcium phosphate consists of two ions chemically bonded together. What are charges of each ion?
Answer: Ca^2+ and P^3-
Explanation:
WILL MARK BRAINLIEST FOR CORRECT ANSWER
Continue reading from Ruby Bridges’s autobiography.
We drove down North Galvez Street to the point where it crosses Alvar. I remember looking out of the car as we pulled up to the Frantz school. There were barricades and people shouting and policemen everywhere. I thought maybe it was Mardi Gras, the carnival that takes place in New Orleans every year. Mardi Gras was always noisy.
As we walked through the crowd, I didn’t see any faces. I guess that’s because I wasn’t very tall and I was surrounded by the marshals. People yelled and threw things. I could see the school building, and it looked bigger and nicer than my old school. When we climbed the high steps to the front door, there were policemen in uniforms at the top. The policemen at the door and the crowd behind us made me think this was an important place.
It must be college, I thought to myself.
–Through My Eyes,
Ruby Bridges
What evidence in the text supports the idea that Bridges did not realize the significance of her first day? Check all that apply.
“I remember looking out of the car as we pulled up to the Frantz school.”
“I thought maybe it was Mardi Gras.”
“As we walked through the crowd, I didn’t see any faces.”
“[The school] looked bigger and nicer than my old school.”
“The crowd behind us made me think this was an important place.”
“It must be college, I thought to myself.”
Answer: I remember looking out of the car as we pulled up to the Frantz school.”
“I thought maybe it was Mardi Gras.”
“As we walked through the crowd, I didn’t see any faces.”
“[The school] looked bigger and nicer than my old school.”
“The crowd behind us made me think this was an important place.”
“It must be college, I thought to myself.
Explanation:
“I thought maybe it was Mardi Gras.”
“[The school] looked bigger and nicer than my old school.”
“It must be college, I thought to myself.”
1. This balanced equation represents a chemical reaction.
2C4H10+ 1302
8CO2 + 10H2O
What type of chemical reaction is represented by the equation?
A. Double replacement
B. Combustion
C. Single replacement
D. Synthesis (combination)
Answer:
combustion is the answer
balanced the equation please Fe + O2 → Fe2O3
Answer: The balanced equation is 4,3,2,
Answer: Balanced equation = 4Fe + 3O2 => 2Fe2O3.
Explanation:
What type of chemical reaction is demonstrated by this equation? A+BX-AX+B
Answer:
d an acid - base reaction.
Explanation:
Answer:
single replacement
Explanation:Look it up and got it from quizlet it should be right.
what is the limiting reactant of 20.0 moles of o2 react with 30.0 moles of h2 according to the following reaction ? 2H2 + O2 = 2H2O
Answer:
The limiting reactant is hydrogen.
Explanation:
According to the balanced equation for synthesis of water, hydrogen is used up twice as fast as oxygen -- we need two moles of H2 for every one mole of O2 when creating water.
Since we have 20 moles of oxygen, this means we would need twice as much hydrogen, or 40 moles, to use it all up. There is only 30 moles of hydrogen, which means that all the hydrogen will be used before the 20 moles of oxygen is used. Hydrogen limits production in this case.
We have that
From the Question we are told that
20.0 moles of o_2
30.0 moles of h_2
Therefore
The ratio
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Which region on the map has the highest risk of future landslides? a- Region 1 b-Region 2 c- Region 3 d- there is no way to make comparisons about the risk of future landslides? The subject is science (8th grade)
Answer:
Explanation:
Which region on the map has the lowest risk of future landslides?