Answer:
pKa = - log Ka = - log (1.3 * 10^-4) = 3.886 5.20 mL of 6.20 M NaOH = 0.00520 L * 6.20 mole…
Explanation:
What happens to excess heat produced in the muscle during contraction and relaxation
Answer:
Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.
Explanation:
Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.
I'll mark you the brainiest if you answer this question first!!!
Read the CDC's recommendations for frequency of handwashing. Do you agree with these recommendations? Explain your answer using the results from the experiment as evidence.
Link down below:
https://www.cdc.gov/handwashing/when-how-handwashing.html
Answer:
Yes, Because the dishes that are unwashed have the most bacteria while the soap & water dish has the least bacteria.
Explanation:
Hope this help
does ch3 have resonance structure?
Answer:
yes
Explanation:
if u watch or look closely u will observe it
The CH₃ has resonance structures as it has odd number of hydrogen atoms.
In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures ,also variously known as resonance structures or canonical structures into a resonance hybrid (or hybrid structure) in valence bond theory. It has particular value for analyzing delocalized electrons where the bonding cannot be expressed by one single Lewis structure.
Thus, CH₃ has resonance structures as it has odd number of hydrogen atoms.
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How many grams of pure aluminum could be produced from 999 g of aluminum oxide?
Answer:
Explanation:
First, calculate the molar mass of Aluminum Oxide (Al2O3), by multiplying the number of the constituent atoms, by their relative atomic abundances . Inserting the atomic masses into the equation gives you . Then find the percent of Aluminum by mass, in Aluminum Oxide. Finally, set up an equality, where 53.02% of the mass of Aluminum Oxide, is 999 grams of Aluminum
introduced in the 13th-16th? century from sabah in the reign of the sultanate of sulu, and became extinct on maguindanao or were transported back to sabah. Bone fragments are the only proof left behind of their existence ...ill mark u as brainliest
The Elephant Maximus is the species that was introduced and later became extinct on Maguindanao.
Extinction occurs as all members of a species die, and therefore the species disappears. This includes complete extinction or extinction of the species in a specific zone.
In the case of the Elephant Maximus, which is known as the Asian Elephant, this species became extinct in a region known as Maguindanao in the Philippines.
This partial extinction occurred as the elephants from this zone were taken to Sabah in Malaysia from the 13th century to the 16th century. This occurred because the Sultans of this region considered this elephant to be a valuable and even sacred animal.
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Rank from most ionic to least ionic
a. WO3
b. MnS
c. MnS2
d. ZnS
e. ZrS2
The order of increasing ionic property is;
WO3 < ZrS2 < MnS2< ZnS < MnS
Ionic compounds are compounds that contain an ion pair. Typically, ionic compounds are formed between metals and nonmetals.
The degree of ionic character depends on the type of metal involved and the magnitude of charge it carries.
Typically, first row transition metals form ionic compounds. The degree of ionic character depends on the row in which the metal is found and the magnitude of charge it carries.
Hence, the order of ionic character of the compounds from most ionic to least Ionic is; WO3 < ZrS2 < MnS2< ZnS < MnS.
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How do you prepare a demi-glace?
Answer:
Explanation:
sory i dont know
All of the following affect toxicity of a substance except*
origin of the substance
nature of exposure
duration
dosage
Answer:
durage
Explanation:
durage just doesn't make sense compared to the other 3
Answer:
Origin of the substance
Explanation:
Origin of a substance doesnt affect toxicity but all other options do
Name the following compound and tell what type of compound it is: Protons 6, Neutrons 8, and electrons 6
Answer:
Carbon-14
Explanation:
It's carbon, because the element has 6 proton.
It's not an ion, because there are same number of proton and electron 6=6
It is carbon-14 because 6 proton + 8 neutron = 14
What happens when the two atoms get even closer?
Answer:
If two atoms get close together then the electrons of each atom will get attracted to the other one and bc one atom lose electrons gets a positive charge and the one with more electrones will get a negetive charge
Explanation:
brailiest pls pls pls
What physical and chemical properties would an antique dealer use to determine the substance that makes up a
piece of jewelry?
Answer:
Characteristics such as melting point, boiling point, density, solubility, color, odor, etc. are physical properties. Properties that describe how a substance changes identity to produce a new substance are chemical properties. ... Physical and chemical properties can be used to classify a substance as ionic or molecular.
High tides are located at__
A an B
B an D
B an C
Answer:
b and c since they bulge
Explanation:
what is the molarity of Li in a solution that contains of 46.552ppm lithium ferrocyanide Li3fe(cn)6
Answer:
hgfdjsuejssj_uyghgjiyr656⁸8⁴83jbv
What is this answer to this problem
Answer:
gdhjvdhihfhddjcuh
dhsgbeyfgjgjjkk
tjfhh
gjgu
33) 1 e = ........С
O 1.6*10^-27
O * 1.6 *10^-19
O 1.66 * 10^-19
o 1.66* 10^-27
Answer
0.16574
Explanation:
because why not
Why do both nuclear and chemical
changes occur?
Answer:
The change in energy for a chemical reaction has to do with the potential energy of the electrons. The change in energy for a nuclear reaction has to do with the potential energy of the nucleus. The change in energy for a nuclear change is many orders of magnitude larger than for a chemical change.
The statement that describes both nuclear and chemical changes occur is "potential energy."
What is nuclear and chemical reaction?Nuclear reactions include a change in the nucleus of an atom, which usually results in the production of a different element. Chemical reactions, on the other hand, require just electron rearrangement and no changes in nuclei.
A nuclear reaction is any reaction that causes the nucleus of an atom to change. An atom's nucleus is made up of protons and neutrons. It seems to reason that a nuclear reaction alters the amount of protons and/or neutrons in an atom.
Chemical changes occur when bonds between molecules or atoms are broken and/or formed to form a new material. In this case, the new substances' qualities differ from the old, the particles differ, and the number of particles can alter.
The change in energy for a nuclear change is many orders of magnitude greater than the change in energy for a chemical change.
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helpppppppppppppppppppppppppppp
Answer:
1)
Explanation:
ok this is a write answer
The ancient Egyptians planted crops and raised
animals for food as early as?
100 AD.
2000 BCE.
5200 BCE.
2560 BCE.
helpppppppppppppppppppppppppppppppppp
Answer:
the drops of liquid are coming from the decreases. they are formed as the motion of the water particles in the air gas. this change in motion cause air in the air to change from a liquid to a water
Hello there!
The drops of liquid are coming from the air. They are formed as the motion of particles in the air decreases. This change in motion causes water in the air to change from a liquid to a gas.
Hope this helps you!
~Just a joyful teen
[tex]SilentNature :)[/tex]
✿❀❁❀✿State at least three different properties of metallic compounds?
Answer:
Very High melting and boiling points.
Very Good Conductors of heat and electricity.
Malleable (can be made into different shapes without breaking)
Ductile (can be molded into wiring)
Explanation:
Answer:
Very High melting and boiling points
Very Good Conductors of heat and electricity
Malleable (can be made into different shapes without breaking)
Ductile (can be molded into wiring)
Metallic luster (shiny)
Sometimes magnetic
Explanation:
What elements are in H2F5BLi and how many atoms are in each element.
20 point plus brainliest
Answer:
2 hydrogen
5 fluorine
1 boron
1 lithium
Can anyone tell me why I got this question wrong? I have no clue.
Answer:
what queastiion
Explanation:
Answer:
what is the question
Explanation:
...
What is equivalent to 750 joules
Answer:
0.179254 kilocalories
Explanation:
divide the energy value by 4184
[tex]0.179254[/tex] that would be your answer
Compost from vegetable peelings can be used as plant fertilizer. * a. reduce b. resuse c. recycle d. recover
Answer:
Is letter B
Explanation:
Hope it helps :))
helppppppppppppppppppppppppppp
Answer:
C is the correct option.
Explanation:
When water reaches 100°C it starts evaporating and the molecules of water turns to vapor.
What is the hydroxide concentration in a 0.20 M potassium acetate solution?
Answer:
Molar concentration of potassium hydroxide
= 0.27 Mol liter/approx
Sometimes people have to cry out all their tears, to make room for a heart full of smiles.
True. I am always sad but my heart is always happy cuz it knows there are good things ahead
why is calcuim (ca) in group 2. period 4 on the periodic table
Answer:
Calcium (Ca) is in group 2 and period 4 on the periodic table be because Calcium has 2 valence electrons and 4 electron shell. Thus, calcium is a metal like all other group 2 element.
Explanation:
In order for a light bulb to be turned on in a circuit, it must have what kind of switch?
Answer:
Both switches must be closed in order for the circuit to be complete and for the bulb to light. (This would indicate the 'armed' status of this burglar alarm.) Magnetic switches come in 2 varieties - "Normally Closed" and "Normally Open". These 2 terms describe the state of the switch when it is NOT being controlled by the magnet.
Explanation:
which of the following is not true for chemical change
Answer:
"They can be reversed by physical changes."
Explanation:
A chemical change can form a new substance, can be detected by the change in color and they have properties different from their starting materials.