Answers
Answer:
I believe the answer is Reflecting Telescope
Explanation:
-leeknowishawt
Related Questions
What is the reactant that runs out first in a reaction called?
O A. The stoichiometry
O B. The limiting reagent
OC. The reactant coefficient
OD. The theoretical yield
(Answer is B.)
Answers
Answer:
limiting reactant
Answer: B) limiting reagent
calculate h30+ for a 8.86*10^3 hbr solution
Answers
[H₃O⁺] = 8.86 x 10³ M
Further explanationThe dissociation of water :
H₂O(l)⇒H⁺+OH⁻
Hydrogen ions H⁺ bond with H₂O to form H₃O⁺ ions(hydronium ion)
When acid(Hbr acid) is in the presence of water(dissociates), the H⁺ ions bond with water molecules to form hydronium, the reaction :
HBr(aq)+H₂O→H₃O+(aq)+Br−(aq
So Ionization of HBr :
[tex]\tt HBr\rightarrow H_3O^++Br^-[/tex]
[HBr]= 8.86 x 10³,
From equation ratio [H₃O⁺] : HBr = 1 : 1, so
[tex]\tt [H_3O^+]=8.86\times 10^3[/tex]
Which property of gases is explained by the process of diffusion?
A.
their ability to compress under high temperature
B.
their ability to expand under low temperature
C.
their ability to expand under pressure
D
their ability to fill the available volume of a container
Answers
Answer:
The appropriate alternative is "Option D".
Explanation:
Diffusion would be a random or physical phenomenon that corresponds to that same transfer budget of molecules from some kind of highly concentrated area to something like a lower one. The substance which diffuses may be strong, liquids, and gaseous. Correspondingly, the framework where certain diffusion happens can however be amongst the three aspects of sustainability.All those other options aren't relevant to the situation in question. So the above alternative becomes the right one.
What volume of H2so4 Solution Cspecific gravity=-1.28 and strength =24.7% by mass) will be required to react completely with 125g ZnC032?
Answers
The volume = 309.04 ml
Further explanationGiven
Specific gravity=-1.28 and strength =24.7% by mass of H₂SO₄
mass 125g of ZnC0₃
Required
The volume of H₂SO₄ Solution
Solution
Reaction
ZnCO₃ + H₂SO₄ → ZnSO₄ + CO₂ + H₂O
mol of ZnCO₃(MW=125.4 g/mol) :
[tex]\tt mol=\dfrac{125}{125.4}=0.997[/tex]
From equation, mol ZnCO₃ : H₂SO₄= 1 : 1 so mol H₂SO₄=0.997
mass of H₂SO₄ (MW=98 g/mol) :
[tex]\tt mass=mol\times MW=0.997\times 98=97.706~g[/tex]
mass of solution :
[tex]\tt \dfrac{100}{24.7}\times 97.706=395.57~g[/tex]
Volume of solution :(density of solution=1.28 g/ml for the reference substance is water(density=1 g/ml)
[tex]\tt V=\dfrac{395.57}{1.28}=309.04~ml[/tex]
A student has 2 rubber balls of the same size and weight. Ball A is still and Ball B is rolling.Ball B hits Ball A, and Ball A start moving. Why does Ball A start moving?
Answers
Answer:
It starts to move because of Newtons first law "An object will not change it's motion unless a force acts on it"
Explanation:
Meaning ball B is that force acting upon ball A
Why halogen of vinyl chloride is inert:
Answers
Answer:
in vinyl chloride there exist a partial double bond between chlorine and carbon atoms.this partial double bond increases the strength of bond between carbon and chlorine.
Explanation:
Answer:
1-because of mesomerism in carbon-halogen bond result to formation of a degree of double bond
Explanation:
[ Methylene=CH_X ] [ (-)Methylene_CH=X(+) ]
2- their preparation from ethylene dihalide
How many Joules of heat would be required
completely melt 5.00 grams of H2O(s) at 0°C at to
H2O(C) at 0°C?
Answers
Heat would be required : 1,670 J
Further explanationGiven
mass of H₂O=5 g
Required
Heat to melt
Solution
The heat to change the phase can be formulated :
Q = m.Lf (melting/freezing)
Lf=latent heat of fusion
The heat of fusion for water at 0 °C : 334 J/g
Input given values in formula :
[tex]\tt Q=5\times 334=\boxed{\bold{1,670~J}}[/tex]
Please help me I really need this done
Answers
Answer is 2
4Fe + 3O2 –> 2Fe2O3
Identify the element in group 15, period 3 by drawing a Lewis Dot Structure
Answers
Answer:
Phosphorus
Explanation:
Lewis Dot Structure is a structural representation of a molecule that shows valence electrons of a molecule.
The element in group 15, period 3 is Phosphorus (P). Phosphorus has an atomic number 15 and valence electrons are 5. So, the lewis structure will show 5 dots around P atom.
which action would not help a person stay safe during a tornado Giving brainliest
Answers
Answer:
B.... i think so, not sure lol
Answer:
B. Driving to get supplies
Explanation:
Don't drive in the middle of a tornado EHLBFDHS
can someone please help me with this....?
Answers
Answer:
Explanation:
The answer is D
1. A force of 30N is applied to a screwdriver to pry the lid off of a can of paint. The
screwdriver applies 90N of force to the lid. What is the MA of the screwdriver?
Answers
Answer:
I would guess that the MA of the screwdriver is 120N.
Explanation:
I think this because you are adding 30 and 90, since there are two forces being acted on the same place in the same direction.
#teamtrees #WAP (Water And Plant)
if I use the answers from here wouldn't that come up as a high % plagiarism ??
Answers
Answer:
No
Explanation:
My sister uses this all the time and it is perfectly safe
Answer:
no
Explanation:
as long as you change it up a little and word it to look like your own
Which of the following is a landscape feature caused by deposition
Answers
Explanation:
Depositional landforms are the visible evidence of processes that have deposited sediments or rocks after they were transported by flowing ice or water, wind or gravity. Examples include beaches, deltas, glacial moraines, sand dunes and salt domes.
hope it helps!
2.
Corona virus has a spherical shape. Its diameter is approximately 120 nm. How
many of them can sit side by side to form a circle around a piece of human hair.
Take the diameter of a hair as 50 um. (Select the nearest value to your calculation
result)
a) 1.23x10 12
b) 4.45 x106
C) 1312
d) 417
Answers
Answer:
417
Explanation:
50um is
50000nm
50000:120=417
Question 15 helpppppppppppppp
Answers
Answer:
A
Explanation:
This is because of the law of conservation of mass. This means that even if a reaction occurs, the mass will remain the same.
New atoms will not be formed, but new compounds will.
thermal decomposition of magnesium nitrate and magnesium hydroxide
Answers
Explanation:
hope it will help you. Wishing a nice day. enjoy with your answer
(GIVING BRAINLIEST!!!)What is the correct formula for the ionic compound that forms when oppositely- charged ions of calcium and carbonate attract?
(ANSWERS ARE IN THE IMAGE)
Answers
Answer:
CaCO₃
Explanation:
Calcium ion is written as Ca²⁺
Carbonate ion is written as CO₃²¯
During bonding, the +2 ions from the calcium and the –2 ions from the carbonate will cancel out given a net charge of zero as shown below:
Ca²⁺ + CO₃²¯ —> CaCO₃
Thus, the correct formula for the ionic compound that forms when oppositely charged ions of calcium and carbonate attract is CaCO₃.
Why does powdered calcium carbonate react faster with hydrochloric acid than calcium carbonate chips?
Answers
Answer:
Exposed surface area
Explanation:
The powdered calcium carbonate will react faster with hydrochloric acid than calcium carbonate chips due to the exposed surface area.
Powdered calcium carbonate has a larger surface area compared to the chips. And, the larger the surface area exposed on a body, the faster the reaction it will undergo.
For the same masses of a solid substance, the smaller the particle size of each form, the larger the surface area exposed to reaction.
The surface area exposed proportionally affects the rate of reaction.
Which is an example of current electricity?
O A. Positively charged particles are attracted to negatively charged
particles.
O B. Negative and positive electric charges build up in different regions
of a cloud.
O C. Electrons flow from an outlet into a toaster, causing it to heat a
slice of bread.
O D. A person rubs a shoe on a rug, causing extra electrons to be
transferred to the shoe.
Answers
Answer:
C. Electrons flow from an outlet into a toaster, causing it to heat a
slice of bread.
Explanation:
Current produces a heating effect. Current may be used to produce a heating effect in appliances such as the electric pressing iron, toaster, oven etc.
When electrons flow from an outlet into a toaster and the current thus obtained heats a slice of bread, current is said to flow from the outlet into the toaster.
Let us remember that current refers to the flow of electrons in a circuit.
Why would Magnesium Phosphate (Mg3(PO4)2) not make an aqueous solution?
Please help!
Answers
Answer:
[tex]\boxed {\boxed {\sf Almost \ all \ phosphates \ are \ insoluble}}[/tex]
Explanation:
For magnesium phosphate to make an aqueous solution, it must be soluble in water.
Let's check the solubility rules. There are many different lists and versions, but it should mention a rule about phosphates.
All phosphates are insoluble except Na₃PO4 (sodium phosphate), K₃PO4 (potassium phosphate), and H₁₂N₃PO₄ (ammonium phosphate).Magnesium phosphate is included in "all phosphates" so it is insoluble and can't become an aqueous solution.
Magnesium Phosphate (Mg₃(PO₄)₂) would not make an aqueous solution because it is insoluble in water.
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.
solvent: the substance in which a solute dissolves to produce a homogeneous mixture.solute: the substance that dissolves in a solvent to produce a homogeneous mixture.According to the solubility rule, all phosphates are insoluble in water except sodium and potassium phosphates and thus magnesium phosphate does not form an aqueous.
Learn more about Solutions, here:
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Which of the following is the fundamental element found in all living organisms? A-iron B-carbon C-calcium D-magnesium
Answers
Answer:
D
Explanation:
Answer:
For me
Explanation:
it's carbon because it's part of our regular respiration
As the temperature of a gas increases with the volume remaining constant, the pressure of the gas A) decreases B) increases C ) remains the same
Answers
Answer:
B) increases
higher temperature = higher pressure
PLS HELP WILL GIVE BRAINLYEST What happens when the magnet is removed from the coil in a circuit?
a.
The current stops
c.
The voltage decreases
b.
The current changes direction
d.
Power output increases
Answers
HELP IGNORE IF YOU DON'T KNOW BRAINLIEST!!
Commercial vinegar is a 5.00% by mass aqueous solution of ethanoic acid. FIND MOLARITY of ethanoic acid in vinegar. Density of vinegar
is 1.00 g/mL
Answers
now here we have,
moles of acetic acid = mass of acetic acid taken/ molecular massofit
now we also know that density = mass/ volume
so the formula of molarity = mass of solute /(molecular mass ofsolute x volume of solution)
= mass of solute / ( molecular mass ofsolutex mass of solution / desnity)
= mass % of vinegar / (molecular massof solute / density)
= (5 /100)/ ( 60/ 1000)
= 5/6
=0.833 (ans)
so the molarity is = 0.833 M
Answer:
What ever the other person said
Explanation:
The mass of magnesium ions in 1 kg of sea water is 1.3 g.
The concentration in parts per million (ppm) is
a 1.3x10^6
b 1.3x10^3
c 1.3x10^-3
I dont understand how to do this question. Help would be much appreciated!
Answers
Answer:
1300 ppm
Explanation:
for ppm, calculate fractional ration =(part/total) and multiply by 1 x 10⁶ => ppm
for ppb, calculate fractional ration =(part/total) and multiply by 1 x 10⁹ => ppb
Parts Per Million (ppm)
Given 1.36g in 1Kg (=1000g) => fractional ratio = (1.3g/1000g)(10⁶) = 1300 ppm
Parts Per Billion (ppb)
or if ppb is needed do the same calculation but multiply by 10⁹ ... That is,
Given 1.36g in 1Kg (=1000g) => fractional ratio = (1.3/1000g)(10⁹) = 1300000 ppb = 1.3 x 10⁶ ppb
Parts per Hundred (pph) is the same as percent (%) ... Calculate fractional ratio and then multiply by 100%
Given 1.36g in 1Kg (=1000g) => fractional ratio = (1.3g/1000g)(100%) = 0.13%
The moment that X-locks are released will determine A. The compliance with ACID B. The anomalies present C. X-locks are always released during commit time D. The granularity of locks
Answers
Answer:
D. The granularity of locks.
Explanation:
X-locks is one of the locks used in locking database in what is known as adaptive server. Other types of locks for locking database are the S-lock, IS-locks, and the IX- locks. The locks are used mainly for control purpose[ that is when a data is been used by a lot of people, the locks make sure that there is consistency in the data.
The option D is correct that is; ''The moment that X-locks are released will determine the granularity of the locks'' The granularity of the locks simply means the amount in which the data can be locked at the same time.
Answer:
Option D (The granularity of locks)Explanation:
The answer is Option D, The Granularity of locks:
In computer science granularity locking is a locking method used in database management systems (DBMS) and relational databases, and granularity of locks in a database refers to how much of the data is locked at one time and it is determined when S locks are released which means Shared Locks.
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https://brainly.com/question/20340779
Calculate the pH for the following buffer solutions with steps.
1. 7.4862 grams of acetic acid and 10.4695 grams of sodium acetate are dissolved in enough deionized water to make 250.0 mL of solution.
2. 11.8115 grams of trimethylamine and 18.7088 grams of trimethylammonium chloride are dissolved in enough deionized water to make 500.0 mL of solution.
Thank You:)
Answers
Answer:
Answer is shown on the paper :D
Explanation:
Remember to follow sig-figs.
Describe Photosynthesis and explain the number of atoms and molecules that are used in a reaction.
Answers
Answer:
Photosynthesis reactions are naturally occurring processes that take place in all green plants and most algae. During this process the plant uses light energy, carbon dioxide, and water to make food and then releases oxygen which all living organisms require to the atmosphere.During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose
Explanation:
1. A dry food product is contained in a 1 cm x 4 cm x 3 cm box using a polymer film to protect the oxygen sensitivity of the product. The concentration gradient across the film is defined by the oxygen concentration in air (0.01164 kg/m3) and 0.244 kg/m3 within the package. The oxygen diffusivity for the polymer film is 3 x 10-16 m2/s. Estimate a- the allowable flux of oxygen into the package (in kg O2/s), and b- the film thickness needed, to ensure a product shelf life of 10 months. The shelf life of the product is established as the time when oxidation reactions within the product have used 0.5 mol of oxygen.
Answers
Answer:
total is 20.8
Explanation:
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