Answer : All Choices And Then The First Two
A syringe was a good choice of tool in this experiment.
It has volume markings that can be read.It will not easily leak gas.A syringe is a simple reciprocating pump consisting of a plunger (though in modern syringes, it is actually a piston) that fits tightly within a cylindrical tube called a barrel
How is syringe made?To manufacture plastic syringes, the machinery required will be injection moulding machines, set of Multi cavity moulds and sterilization chamber. Polypropylene granules are fed into an injection-moulding machine, where they are plasticized and then injected into a Multi cavity mould.
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What volume of 1.25 M lithium hydroxide LiOH is needed to neutralize 445 ml of 0.550 M phosphoric acid (H₃PO₄ )?
Answer:
0.587 litres (3 s.f.)
Explanation:
Please see attached picture for full solution.
Which of these makes a source more reliable?
A. if you have cited it correctly
B. if you found the information online
C. if the information is from expert scientists
D. if you are skeptical when you hear new information
The taxonomic classification system contains three Domains . List all 3 Domains: (Hint: last 3 slides of the PDF Power Point will all give the answer
Answer:
Archaea, Bacteria, and Eukarya.
Explanation:
hope this helped
What is the molariity of a 50.0 mL aqueous solution containing 10.0 grams of acetic acid, CH3COOH
Answer:
Molarity is 1.25
Unlike a mixture a compound always has:
A: a variable composition
B: a constant composition
C: allotropic composition
D: a metallic composition
an
Answer:
Explanation:
B
Answer:
B:
Explanation:
What is kinetic energy (KE)
A. energy an object has because of its position
B. energy an object has because of its height
C. energy an object has because of its direction
D. energy an object has because it is moving
Answer:
The answer is D, I hope this helps
Answer:
It would be D.energy an object has because it is moving-hope this helps
What is the molar mass of magnesium (Mg)? A 12.00 g/mol B 22.99 g/mol C 24.31 g/mol D 26.98 g/mol
Answer:
C 24.31g/mol
Explanation:
if you look at the periodic table, than when you look at the element magnesium (Mg) it is 24.305 in atomic mass which rounds up to 24.31
how many moles in 2.5 liters of methane gas
Answer:
0.155836449023405
Explanation:
The molecular formula for Methane is CH4.
The SI base unit for amount of substance is the mole.
1 grams Methane is equal to 0.062334579609362 mole.
Answer:
Explanation:
After calculating the answer will be 0.112 mol CH4
Why would the Linnaeus system not stay the same? Explain in your own words.
Answer:
The Linnaeus system of classification will always stay the same. o Fact: Linnaeus system will always stay the same exact way.so therefore it will stay the sam infact it will keep going.
Explanation:
Evidence shows that traits going from species,genus,family,order,class,phymisnes,and then kingdom.
Acetic acid is found in significant quantities in
Answer:
Acetic acid is found in significant quantities in Vinegar
Acetic acid is found in large concentration or quantity in the vinegar which acts as a main component of vinegar.
In which material the acetic acid is present in large amount?Acetic acid is the main component of vinegar which contains about 4 - 18% of acetic acid. This acid is used as a food preservative as well as food additive.
So we can conclude that acetic acid is found in large concentration or quantity in the vinegar which acts as a main component of vinegar.
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PLEASE HELP ME
Which statement is true about HCl? (15 points)
Select one:
a. It is a salt because it increases the concentration of metallic ions.
B. It is a salt because it is formed by the reaction of an acid and a base.
C. It is an acid because it increases the concentration of hydroxyl ions. D. It is an acid because it increases the concentration of hydrogen ions.
Answer:
A i think idk sry
Explanation:
Answer: D
Explanation: It is an acid because it increases the concentration of hydrogen ions
how many moles are in 27.5 grams of CaCO3
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CaCO3, or 100.0869 grams.
Explanation:
Which function do pygmy rabbits serve in a desert?
OA) eat sagebrush
B) make their own food
C) perform photosynthesis
D) convert light energy to chemical energy
Answer:
A
Explanation:
A: Eat sagebrush
A rabbit is an animal. It cannot make it's own food. It is a heterotroph, and it needs to feed on other organisms to survive. A pygmy rabbit would eat sagebrush, therefore this is the correct answer.
B: Make their own food
Rabbits and animals can't make their own food, they have to eat other things to survive. Therefore, this answer is incorrect.
C: Perform photosynthesis
Rabbits and animals can't perform photosynthesis, only plants, algae, and certain bacteria can. This answer is also wrong.
D: Convert light energy to chemical energy
In the process of photosynthesis, light energy from the sun is turned into chemical energy. Animals like rabbits can't perform photosynthesis, so this choice is also incorrect.
The best choice is A: eat sagebrush.
What is the role of a scientist
Answer:
This is what they usually do.
Explanation:
Scientists are often people who want to see change occur. ... Today, the role of a scientist is the same. We have the obligation to explore and discover. Scientists use their resources to bring about change, whether it is change in medicine, improvements in the environment, or creating more efficient fuels
Scientist Responsibilities. The role of a scientist is integral and vital for the better functioning of society. Scientists are responsible for conducting detailed research on various subjects. They are liable for influencing modern society with their new developments and innovations, bringing about a great change in the quality of life.
Consider the redox reaction below. 2 upper A l (s) plus 6 upper H C l (a q) right arrow 2 upper Al upper C l subscript 3 (a q) plus 3 upper H subscript 2 (g). Which statement correctly describes a half-reaction that is taking place? Hydrogen is oxidized from +1 to 0. Chlorine is reduced from –1 to 0. Aluminum is oxidized from 0 to +3. Hydrogen is reduced from 0 to –1.
Answer:
Aluminum is oxidized from 0 to +3
Explanation:
In order to make the question clearer, let me give the reaction equation in terms of chemical symbols. It will aid your understanding of the question posed.
2Al(s) + 6HCl(aq) ----> 2AlCl3(aq) + 3H2(g)
You have to recall that oxidation has to do with increase in oxidation number. A specie is said to be oxidized when the said specie experiences an increase in oxidation number. A reduction on the other hand occurs when a specie undergoes a decrease in oxidation number.
Since the oxidation number of an uncombined element is zero, aluminum has an oxidation number of zero on the left hand side. Over on the right hand side, the oxidation number of aluminium increases to +3. Hence aluminum was oxidized from left to right.
Answer:
Aluminum is oxidized from 0 to +3
Explanation:
Ty thinks it's strange that a person with an Asian-sounding name speaks Spanish as her primary language. Ty's thoughts are an example of
A.interpersonal racism
B.racial stereotyping
C. racial inequality
D. institutional racism
Answer:
A. Interpersonal racism
Explanation:
Its not stereotypical to think that an Asian cant speak Spanish. The fact that he thought, Asian-sounding name, is stereotypical on its own, but taking in this entire situation, this is not racial stereotyping. It's also not racial inequality, since Ty isn't saying that Asians are asian people are lesser than another group. Institutional racism occurs when schools, governments, etc etc that seem race neutral are actually disadvantage racially marginalized groups and privilege whites.
Answer:
B.) Racial stereotyping
Explanation:
The role of chlorophyll during photosynthesis is to
-release carbon dioxide
-reflect light energy
-make ATP
-absorb light energy
Answer:
Absorb light energy
Explanation:
Chlorophyll absorbs light energy which is used to produce carbohydrate and oxygen in the presence of carbon dioxide and water.
It is best to say that electric motors require _______ to work. a. a continuous current b. a galvonometer c. a generator d. energy
Answer:
The answer is a) continous current
How many grams of
CO2 will be produced
by burning 6 grams of carbon?
Please I really need your help
Answer:
Explanation:
22g of CO2
Sodium metal reacts with water to produce sodium hydroxide and
hydrogen gas. Determine the amount of hydrogen gas produced if 25.6
grams of sodium reacts with excess water.
Answer:
1.11g of H2.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
2Na + 2H2O —> 2NaOH + H2
Next, we shall determine the mass of Na that reacted and the mass of H2 produced from the balanced equation. This is illustrated below:
Molar mass of Na = 23g/mol
Mass of Na from the balanced equation = 2 x 23 = 46g
Molar Mass of H2 = 2x1 = 2g/mol
Mass of H2 from the balanced equation = 1 x 2 = 2g
From the balanced equation above, 46g of Na reacted to produce 2g of H2.
Finally, we shall determine the mass of H2 produced by the reaction of 25.6g of Na. This is illustrated below:
From the balanced equation above, 46g of Na reacted to produce 2g of H2.
Therefore, 25.6g of Na will react to produce = (25.6 x 2)/46 = 1.11g of H2.
Therefore, 1.11g of H2 is produced from the reaction.
Answer:
[tex]n_{H_2}=0.557molH_2\\\\m_{H_2}=1.11gH_2[/tex]
Explanation:
Hello,
In this case, such chemical reaction is represented by:
[tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex]
Thus, for 25.6 grams of sodium, whose molar mass is 23 g/mol, reacting in excess water, the amount of hydrogen gas, whose molar mass is 2 g/mol, that is obtained is computed by using the 2:1 molar ratio between sodium and hydrogen:
[tex]m_{H_2}=25.6gNa*\frac{1molNa}{23gNa} *\frac{1molH_2}{2molNa} *\frac{2gH_2}{1molH_2} \\\\m_{H_2}=1.11gH_2[/tex]
Or in moles:
[tex]n_{H_2}=25.6gNa*\frac{1molNa}{23gNa} *\frac{1molH_2}{2molNa} \\\\n_{H_2}=0.557molH_2[/tex]
Regards.
Someone please help me rephrase this or make it shorter :
When light shines on an object it is reflected, absorbed or transmitted through the objects material and the frequency (color) of the light.
Answer:
When light shines on an object it is either reflected, absorbed, or transmitted through the object to produce a frequency (color).
Explanation:
When light shines on an object it is either it is reflected, absorbed or transmitted through the objects material and produce light of some frequency or color.
What is reflection?Reflection is the process in which an incident light ray on a transparent material returns back in the straight direction which make the material gleaming.
Absorption is the process of absorbing a fraction of the incident light. It depends on the nature of the material. Transmission is the process of penetrating of light through a material and returns backs through the other end.
All these three process does no occur together for a material. Either one will be taken place when light is hit on the material and it reflects or transmits it produce a light of certain frequency.
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5 Points
How have scientists been able to determine the composition of Earth's
layers?
A. By studying the magnetic fields of various planets and moons
B. By looking at how seismic waves change speeds as they travel
through Earth
C. By looking at how X-rays affect the planet
D. By studying layers of other planets and moons
CUIDAIT
Answer:
B
Explanation:
By looking at how seismic waves change speeds as they travel
through Earth
Answer:
b.
Explanation:
What is the percent of iron (Fe) in 325g of FeCl3
Answer:
Element Symbol Mass Percent
Chlorine Cl 65.571%
Iron Fe 34.429%
Explanation:
A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Which is symbol of this radionuclide?
Superscript 32 subscript 17 upper P
Superscript 17 subscript 15 upper P.
Superscript 30 subscript 15 upper P.
Superscript 32 subscript 15 upper P.
Answer:
D. superscript 32 subscript 15 upper P
Explanation:
took the test
An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Superscript 32 subscripts 15 upper P is a symbol of this radionuclide. Therefore, option D is correct.
What is a radionuclide?A radionuclide is a type of nuclide that is unstable and undergoes radioactive decay. This means that the nucleus of the radionuclide is not stable and will spontaneously emit energy in the form of particles or electromagnetic radiation to become more stable.
The symbol of an element is determined by the number of protons in the nucleus, which is also known as the atomic number. In this case, the radionuclide has 15 protons, so it is an atom of phosphorus, which has an atomic number of 15.
The total number of nucleons in the nucleus (protons + neutrons) is 15 + 17 = 32. Therefore, the correct symbol for this radionuclide is Superscript 32 subscript 15 upper P, which represents an isotope of phosphorus with a mass number of 32.
Thus, option D is correct.
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What is the total mass of solute in 1000 g of a solution having a concentration of 5 ppm
It's 500 pounds worth of rpm and solute when put together to form a compound of space and time to warp quantum matter to the point of no existence for big bang reopening of time and super warp of neutral electronic atoms with a power of 4 to 5 in ratio of micrometers squared to the power of 10
When 10 moles of O₂ reacts with 1.4 moles of C₁₀H₈ what is the limiting reactant? *
Answer:
O2 is the limiting reactant.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
2C10H18 + 29O2 —> 20CO2 + 18H2O
The limiting reactant can be obtained as follow:
From the balanced equation above,
2 moles of C10H18 reacted with 29 moles of O2.
Therefore, 1.4 mole of C10H18 will react with = (1.4 x 29)/2 = 20.3 moles of O2.
From the above calculation, we can see that it will take a higher amount of O2 i.e 20.3 moles than what was given i.e 10 moles to react completely with 1.4 mole of C10H18. Therefore, O2 is the limiting reactant and C10H18 is the excess reactant.
Help on two science questions please!!
Number 2 I believe is D and number 3 is most likely A
Answer:
2) The clothes picked up opposite charges which caused them to cling to each other.
3) A crinkled-up ball of aluminum foil will conduct the charges and remove the charges from the clothes.
Explanation:
I'm sure. Like pretty sure.
Hope this helped lots and lots,
sincerely, me
What should you do with leftover prescription medication after you
no longer need them?
HOLD ONTO THEM IN CASE YOU NEED THEM IN THE FUTURE
OFFER THEM TO SOMEONE ELSE WHO MAY NEED THE
MEDICATION
PROPERLY DISCARD THE REMAINING PILLS
CONTINUE TAKING THEM UNTIL THERE ARE NO PILLS LEFT
Answer:PROPERLY DISCARD THE REMAINING PILLS
Explanation: IT COULD BE EXPIRE AND YOU NEED THEM ANY MORE DISPOSE THEM!!!!!!!!
Answer:
properly to discard the remaining pills
Explanation:
!!Help!!Polysaccharides are healthier for the body than mono- or disaccharides are. What choices could you make to increase your consumption of polysaccharides and decrease your consumption of mono- and disaccharides? List at least four choices you could make. (4 points) Starch and cellulose are polysaccharides; sugars of various sorts are mono- and disaccharides.
Answer:
We have to consume starch and cellulose in large amount in order to increase the consumption of polysaccharides which make our body healthier.
Explanation:
Starch is polysaccharide which is made up of many glucose molecules. it is mostly made in the body of plants and when we eat that plant this starch is transferred to our body and our body use it when it is needed while cellulose also made of hundred of glucose molecules but our body is unable to digest it because our body is unable to break the bonds between the monosaccharide of cellulose. It is good for humans due to the presence of high amount of fibers.
please help idk what to do
Answer:
2H and 6N
EXplain
You need one H and three N molecules for one molecule of NH3 for you’ll need 2 H and 6N Molecules to create 2
Answer:2h and 6n
Explanation:
Hope i could help