Answer:
true
Explanation:
please help quickly the answer on the pic I attached
Answer:
letter C is a structure most like that of slate
What's the fomular for this?
Answer:
1000 km/s is the formula for density of liquid
The volume of one mole of carbon dioxide gas at (STP) is__L
Explanation:
[tex]22.4 lit[/tex]
At constant P and n, T decreases at V is?
Answer:
This means that as pressure increases,the volume decreases or the volume increases as the temperature increases, and decreases as the temperature decreases
1. The maximum recommended amount of citric acid (H3C6H5O7; the 3 hydrogens listed first are the acidic hydrogens – the only hydrogens that react in a neutralization reaction) in skin creams, serums, and lotions is 0. 50% by mass. A face serum containing citric acid is sold in a 250. 0 mL bottle. If the face serum has a density of 0. 979 g/mL, how many grams of citric acid is in the bottle of serum?.
The density has been given as the mass of the substance per volume of the solution. The mass of citric acid in the bottle has been 1.22 grams.
What is percent mass?Percent mass can be given as the mass of substance in the total mass of the solution.
The volume of the face serum has been 250 mL, and the density is 0.979 g/mL.
The mass of face serum in the bottle has been:
[tex]\rm Density=\dfrac{Mass}{Volume}\\ 0.979\;g/mL=\dfrac{Mass}{250\;mL}\\ Mass=244.75\;g[/tex]
The total mass of face serum has been 244.75 grams.
The percent mass of citric acid in face serum is 0.5%. This states the presence of 0.5-gram citric acids in 100 grams sample.
The mass of citric acid in the face serum sample is given as:
[tex]\rm 100\;gram\;sample=0.5\;g\;H_3C_6H_5O_7\\\\244.75\;grams\;sample=\dfrac{0.5}{100}\;\times\;244.75\;grams\; H_3C_6H_5O_7\\\\244.75\;grams\;sample=1.22\;grams\;H_3C_6H_5O_7[/tex]
The mass of citric acid present in 250 mL serum sample has been 1.22 grams.
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The sound of a plucked guitar string travels through the air and strikes the eardrum of a person in the same room. How does the sound wave change when it transfers from the air to the person’s eardrum?
Both the speed and the wavelength of the sound change.
Neither the speed nor the wavelength of the sound change.
Both the frequency and the wavelength of the sound change.
Neither the frequency nor the wavelength of the sound change
When sound wave travels from air to a person's eardrum, both the speed and the wavelength of the sound change.
Refractive index of soundThe refractive index of sound is obtained from the ratio of speed of sound in air to speed of sound in material.
refractive index = speed of sound in vacuum / speed of sound in material
refractive index = wavelength of sound in material / wavelength of sound in vacuum
Note: the frequency sound will remain constant.
Thus, when sound wave travels from air to a person's eardrum, both the speed and the wavelength of the sound change.
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I need to add 8 moles of carbon to the reaction. How many grams of carbon should i weigh?.
Answer:
96g
Explanation:
so, molar mass of C =12g/mol
C=8 moles
8x12
= 96
Why does an electrolyte conduct electricity? (IF ANSWER IS GOOD AND CORRECT I WILL GIVE BRAINLIEST)
Answer:
because there's a chemical reaction that happens between the anions and cations. The cations are positive ions and anion are negative ions. the reaction occurs as one loses electrons and the other one gaining.
A hot metal block is placed into a beaker of cold water. Explain what happens to
the thermal energy of the system.
Answer:
the metal gets cold and week
Explanation:
55.99 mols of nickel carbonyl produces how many grams of nickels?
it’s stoichiometry practice! please help! will award brainliest!!
Answer:
3286 grams
Explanation:
For every mol of Ni(CO)4 reactant, a mol of Ni is produced (55.99 mol). Multiply this by the molecular mass of Ni (58.69 g/mol) to give 3286 grams
Answer:
Element Symbol Atomic Mass # of Atoms Mass PercentNickelNi58.6934134.377%CarbonC12.0107428.139%OxygenO15.9994437.484%
What effects do mutations have? Check all that apply.
could change protein shape
never change protein shape
might be neutral
always change the way a trait is observed
might be harmful
might be beneficial
Answer: A, C, E, F
Explanation: cuz edge 2020
Answer:
a, c, e, f
Explanation:
got it right on edge2020
Hard water has high concentrations of: a. sodium and chloride b. calcium and fluoride c. magnesium and sodium d. sulfur and potassium e. calcium and magnesium
Hard water is water that contains calcium ions or magnesium ions.
What is hard water?The term hard water is water that contains calcium ions or magnesium ions. These ions are able to interact with soap and prevent the formation of lather thereby making it difficult for this water to be used in washing.
However, hard water is good for building strong bones as well as for building the calcareous shell of organisms.
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copy the following circuit diagrams. Calculate the missing current values for the ammeters in the following circuits:
pls answer the question quickly with a formula or explaining if it needs thanks
Answer:
in a
A2 is 0.5 also because they are in series
in b
A5 is 0.25 because A4+A5 should give A3
in c
What is the pressure in atm of 0.47mol of a gas in a 1.7L container at 276K?
How are salt-water ecosystems and freshwater habitats different from one another?
Salt-water ecosystems are home to migrant animals but animals in freshwater habitats live there all year.
Some land mammals live in freshwater habitats but not in salt-water ecosystems.
Freshwater habitats are more diverse than salt-water ecosystems.
Some land mammals live in salt-water ecosystems but not in freshwater habitats.
Given what we know, we can confirm that the option that most explains the difference between Salt water ecosystems and fresh water habitats is option C.
How are these ecosystems different?We can say that Fresh water habitats are more diverse than Salt water ecosystems. This is the correct option amongst the ones listed. The options regarding land mammals are incorrect given that land mammals may use Salt water ecosystems, but do not reside in them. Finally, option A is incorrect given that both fresh and Salt water animals are often migratory.
Therefore, we can confirm that for these reasons, the correct choice is option C.
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Answer:
Some land mammals live in freshwater habitats but not in salt-water ecosystems.
Explanation:
i did the quiz
hey This is my first E day of learning online so it would mean the world for so help!
(ALSO I MADE IT 98 points)!
Answer:
Explanation:
This is answer to your other question:
Mosquito has the smallest number of chromosomes of the organisms shown. So it will be the simplest for studies. Also because mosquito reproduces within days, you can study effects of any chromosome change on its offspring.
30 POINTS PLEASE HELP ME I NEED YALL PLEASE
6CO2 + 6H2O → C6H12O6 + 6O2
glucose produced = 1/6 x 23.6 = 3.93 moles
Answer:59/150
Explanation:
Which statements are true based on specific heat? Check all that apply. Land heats up/cools down faster than water. Regions with moderate climates often have large bodies of water surrounding them. Water boils quicker than alcohol or ether.
Specific heat is the quantity of heat required to raise the one gram of substance by one degree Celsius. Both A and B is correct.
What is specific heat ?Specific heat is the quantity of heat required to increased the temperature of one gram of a substance by one Celsius degree.
The units of specific heat are usually measure in calories or joules per gram per Celsius degree. For example, the specific heat of water is 1 calorie (or 4.186 joules) per gram per Celsius degree.
The specific heat is the amount of heat required to raise a gram of water by one degree Celsius. When heat is absorbed by H₂O, the hydrogen bonds starts to break and the water molecules are move. This means that water can absorb heat before change in temperature.
Thus, both A and B are correct.
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If a cat climbs a tree , what chemical process is taking place to provide the power for this movement?
Answer:
Respiration
Explanation:
Mitochondria convert glucose and oxygen to carbon dioxide, water. This reaction (respiration) releases energy whigh can be used to climb a tree and much more.
Assuming silk from spiderwebs could be made just as strong as Kevlar, why would a company still choose to use Kevlar in producing bulletproof fabrics? (1 point)
A.Spiderweb silk likely involves more chemicals.
B.The cost might be higher for producing spiderweb silk.
C.A much larger amount of silk might be needed to produce the same effect.
D.Spiderweb silk would likely be rejected by the body.
Answer:
C. A much larger amount of silk might be needed to produce the same effect
Explanation:
As you may know it will take a lot of silk to make bullet proof fabric out of it.
Answer:
I Guess C
Explanation:
The availability of spider silk is not enough for what is needed, so i believe C is the right answer. But that means that B is also a bit correct .
Question 17 An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull? (a) Mustard oil (b) Soft drink (c) Coconut oil (d) Kerosene
Answer:
(b) Soft drink
Explanation:
Because soft drinks contain carbonic acid, which reacts with the iron nail. An iron nail kept in a soft drink will lose its shine and appear dull. Because mustard oil, coconut oil, and kerosene have no reaction with iron nails, they do not lose their shine when maintained in these solutions.
How many solutions does the equation (―3)(+ 1)(+ 5) = 0 have? What are the solutions?
Answer:
- 15 = 0
Explanation:
==> (―3)(+ 1)(+ 5) = 0
==> -3 × +1 × +5 = 0
==> -3×+5=0
==> -15=0
An area of high pressure will most likely result
in which type of weather?
Answer:
Air pressure is the weight of air particles pressing down on the surface of the earth. Air pressure may be high or low. A high pressure system is associated with cooler temperatures and clear skies. A low pressure system is associated with warmer weather, storms or precipitation.
Barometer Measures: Air Pressure
Rain Gauge Measures: Precipitation
Answer:
Dry weather and sunshine :D
Dmitri mendeleev contribution to the periodic table.
In 1871, a Russian Chemist, Dimitri Mendeleev, gave a useful scheme for classification of elements. He presented the first regular periodic table in which elements of similar chemical properties were arranged in eight vertical columns called groups. The horizontal rows of table were called periods. He arranged elements in ascending order of their atomic masses and found that elements having similar chemical properties appeared at regular intervals. This observation was called Periodic Law.
Name each of the stages in the life cycle of our sun. Describe what each stage is like, or what happens to cause it to change from one stage to the next
Explanation:
i hope this helps
please mark me brainliest
Convert from 150 cal(or kcal) to joules. Remember that 1 cal = 4.184 J.
Answer:
627.6
Explanation:
150 x 4.184 = 627.6
Remember:
calories multiplied by 4.184
Fill in the blanks for the crown thing
Based on the positions of landscape features in my watershed model, I predict there will be ________ number of watersheds located at these locations in my model: __________________________________
The term watershed refers to a region of land through which water may be drained into a particular receiving water body.
What is a watershed?The term watershed refers to a region of land through which water may be drained into a particular receiving water body such as a river or a stream. The question is incomplete as the watershed model was not shown here.
However, watersheds provide movement corridors for water and may help to prevent erosion and manage the ecosystem better.
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How many moles of carbon dioxide are in 3. 33 x
1024 molecules of carbon dioxide?
Answer:
1 mole of CO2 has 6.02 x 10^23 molecules of CO2. Say x moles of CO2 has 3.0x10^23 molecules of CO2. Therefore x = 3/6.02 = 0.50. M = 0.50 * (12 + 2x16) = 0.50 * 44 = 22g.
8) Hospitals buy 400 L cylinders of oxygen gas compressed at 150 atm pressure. They need to
administer oxygen to patients at 3.0 atm. What volume (V2) of oxygen can a cylinder supply at this lower
pressure?
Answer:
the answer will be 20,000 L
The molar solubility of ________ is not affected by the pH of the solution. MnS AlCl3 NaF Na3PO4 KNO3
Answer:
The molar solubility of KNO3 is not affected by the pH of the solution. MnS AlCl3 NaF Na3PO4 KNO3
Explanation:
KNO3 is a salt which is formed on the reaction of Strong Acid (HNO3) & Strong Base ( KOH).
Potassium ions nor Nitrate ions can neither loose or gain protons & Hydrogen ions . So there will no effect in pH of the Solution .
