Answers
Answer:
1.5e + 24 I think, hope this can help
Related Questions
A. How do the following factors affect the spontaneity of a reaction?
i. Enthalpy
ii. Entropy
Answers
Help!!!!
I can’t understand this question
Answers
Answer:
free points!!!!!!!!!!!!!!
Which of these cannot be
a source of centripetal force?
A. mass
B. friction
C. electric force
D. gravity
Answers
Answer:
D. GravityExplanation:
Gravity cannot be a source of centripetal force. Gravity is the force of attraction from between all masses in the universe; especially the attraction of the earth’s mass for bodies near its surface; “gravitation cannot be held responsible for people falling in love” with Albert Einstein.
It manner that is serious and solemn. A solemn and dignified feeling.
Therefore, the correct answer is d. gravity.
Mass never provides any force. It is what forces act on. Friction acts as a centripetal force on roads when you’re turning in a circle. Gravity acts as a centripetal force for things like satellites and rockets that orbit Earth and other planets. I’m less familiar with electric force, but I’m sure it can work as centripetal force too. Mass is the only option here that isn’t even a force.
How do I perform a titration on coca-cola or Pepsi, when I cannot see the color change because the color is too dark. The indicator is phenolphthalein.
Answers
Answer: maybe you need to do very dilute solution?
Explanation: you should have an pH meter instead of indicator.
Phosphoric acid H3PO4 have three ekvivalent points.
Another way could be using a conductivity meter.
For colorless WEAK reactants(acids/bases), use phenolpthalein..
For colorless STRONG reactants, use methyl orange.
A 10.150g sample of a compound known to contain phosphorus and oxygen yields 5.717 g of oxygen. Find the empirical formula of the compound
Answers
Answer: The empirical formula is [tex]P_2O_5[/tex]
Explanation:
Mass of O = 5.717 g
Mass of P= (10.150-5.717) g = 4.433 g
Step 1 : convert given masses into moles.
Moles of O =[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{5.717g}{16g/mole}=0.357moles[/tex]
Moles of P=[tex]\frac{\text{ given mass of P}}{\text{ molar mass of P}}= \frac{4.433g}{31g/mole}=0.143moles[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For O = [tex]\frac{0.357}{0.143}=2.5[/tex]
For P =[tex]\frac{0.143}{0.143}=1[/tex]
The ratio is to be converted to whole number
Thus whole number ratio of O : P = [tex]2.5\times 2:1\times 2=5: 2[/tex]
Hence the empirical formula is [tex]P_2O_5[/tex]
Which best describes the products of a
chemical equation?
A. Chemicals before the reaction starts
B. Chemicals after the reaction ends
C. Chemicals on the left of the arrow
D. Chemicals on the right of the arrow
Answers
Answer:
b?
Explanation:
Chemicals after the reaction ends during chemical equation. Therefore, the correct option is option B among all the given options.
What is chemical equation?In chemistry, you will frequently come across a chemical equation. It is a textual depiction of the procedure that takes place throughout a chemical reaction using numbers and symbols.
The reactants are placed on the left side of such an arrow in a chemical equation, while the reaction's products are placed on the right. Though certain equations may imply equilibrium with the reaction occurring in both directions simultaneously, the tip of the arrow normally heads toward the right or product side of the equation. Chemicals after the reaction ends during chemical equation.
Therefore, the correct option is option B.
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how does dipping an iron bucket in Molten zinc protect it?
Answers
Answer:
It forms a barrier that prevents corrosive substances from reaching the underlying steel or iron. The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc. The zinc protects its base metal by corroding before iron.
Explanation:
Answer:
It protects it from corrosion.
Explanation:
Zinc protects iron and steel from the relentless forces of corrosion. Galvanizing iron and steel by dipping them in molten zinc creates an alloy that can, in the right environmental conditions, protect the iron or steel beneath it for 100 years or more.
10 If Steve was making a solution of ammonium
chloride, how many grams would he have left
undissolved (if any) if he initially placed 140 g of
the chemical into 200 grams of water at 80 °C.
Answers
Answer:
8.8g of ammonium chloride would be undissolved.
Explanation:
The solubility of ammonium chloride at 80°C is: 65.6g / 100mL
As the solubility is 65.6g / 100mL, in 200g = 200mL the solubility will be:
65.6g * 2 =
131.2g / 200g
That means the water at this temperature will dissolve 131.2g of ammonium chloride. As were placed 140g, the mass that will be undissolved is:
140g - 131.2g =
8.8g of ammonium chloride would be undissolved
1. An unknown compound was found to have a percent composition of: 47.0%
potassium, 14.5% carbon, and 38.5 % oxygen. What is its empirical formula? If
the true molar mass of the compound is 166.22 g/mol, what is its molecular
formula?
Answers
Answer:The empirical formula is KCO2
Explanation:
What does the mole ratio represent
Answers
Answer:
A mole ratio is a conversion factor that relates the amounts in moles of any two substances in a chemical reaction
Explanation:
What is the mass of 4.57 x 1021 molecules of ammonia (NH3)?
Answers
Answer:
4665.97
Explanation:
What is the mass of 1.50 mole of (NH4)2CO3?
Answers
Answer:
144.12873
Explanation:
Hope this helps you
-----------------------------------------------------------------------------------------------------------------
回答：
144.12873
説明：
これがお役に立てば幸いです
Answer:
96gm/mole
Explanation:
(NH 4)2CO 3 =2×18+12+3×16=96gm/mole
Microorganisms have a major role in maintaining soil biodiversity. They recycle nutrients in ecosystems and decompose organic matter in soil. Organic matter contains dead and living plant and animal materials. Microorganisms convert these materials into simpler compounds that maintain soil quality and help with plant growth.
Which solution could best help to restore or increase microorganisms and soil biodiversity?
A.
adding manure or compost to the soil
B.
spraying chemical weed-killers and fertilizers on the soil
C.
removing all ground-covering plants from the soil
D.
adding sewage containing synthetic materials to the soil
Answers
Answer:
A i think
Explanation:
The solution that could best help to restore or increase microorganisms and soil biodiversity is adding manure or compost to the soil.
What are microorganisms?A microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India.
“Microorganisms are minute organisms that are invisible to the normal eye.” Microorganisms are so small that they can only be seen under a microscope. These include a huge range of organisms such as bacteria, viruses, fungi, algae, protozoa, etc.
Given options are-
A. adding manure or compost to the soil
B. spraying chemical weed-killers and fertilizers on the soil
C. removing all ground-covering plants from the soil
D. adding sewage containing synthetic materials to the soil
Therefore, The solution that could best help to restore or increase microorganisms and soil biodiversity is adding manure or compost to the soil.
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Compare the drops of wax that harden in hot water and Cold water.
Answers
Answer: They are are simular because when the wax cools down its not hot or it cools down it is the same with hot water it cools after along while.
Explanation:
(No scammers) can someone help me pls
Answers
Answers is - 198 kilo joules
Is heat a from of kinetic or potential energy?
Answers
Answer:
its made up of both but I would probably say kinetic
Explanation:
How would I make a biodegradable mask
Answers
Answer:
Explanation:
Go to a craft store and buy so me material that are biodegradable
what happens to the rate of a reaction as the reaction progresses
Answers
If a sound wave refracts, what happens to it? Select all that apply.
It changes its speed and wavelength when it bounces off of a solid surface.
B
It changes direction when it passes through an opening
С
It changes its speed and wavelength when it passes through an opening
D
It changes direction when it passes from one medium to another
E
It changes its speed and wavelength from one medium to another.
F
It changes direction when it bounces off of a solid surface.
Answers
If a sound wave refracts,It changes its speed and wavelength when it bounces off of a solid surface,It changes its speed and wavelength when it passes through an opening, and It changes direction when it passes from one medium to another. Therefore, option A, C and D are correct.
What is refraction of sound wave ?An important case in which sound waves change form or spread out is called refraction. This phenomenon affects the bending of a sound wave owing to changes in the wave's speed.
Refraction is the reason ocean waves near a shore parallel to the beach and why glass lenses can be used to focus light waves.
If the air above the earth is warmed than that at the surface, sound will be change shape back downward toward the surface by refraction. Sound propagates in all directions from a point source.
Thus, option A, C and D are correct.
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Viruses are not considered organisms, because they lack many of the characteristics of living things. A virus is essentially a string of genetic material in
a protein coat. Some viruses contain DNA, while others, called retroviruses, contain RNA. One example of a retrovirus is HIV, which causes AIDS
How is RNA different from DNA? Choose the 2 statements that apply
A. DNA and RNA use different sets of nitrogen bases.
B
DNA has 1 strand of genetic material while RNA has 2 strands
C. DNA contains deoxyribose sugar and RNA contains ribose sugar,
D. DNA and RNA are proteins
Answers
Answer:
well, I think the answer is C
The difference between RNA and DNA are:
A. DNA and RNA use different sets of nitrogen bases.
C. DNA contains deoxyribose sugar and RNA contains ribose sugar.
What are RNA and DNA?DNA and RNA, both are genetic materials, but DNA is double-stranded and RNA is single-stranded.
DNA is present in all animals and plants, and RNA is present in viruses and bacteria.
Both are made up of nitrogenous bases and sugar.
Thus, the correct options are A and C.
Learn more about viruses
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Bloc ate 1 craft craft had 3 crafts. How much crafts are there?
Answers
PLEASE HELP I LITERALLY CAN'T
What volume does 1 mol of Ar(g) occupy at 25 C and 100 kPa?
a) 24.8 L
b) 1.0 L
c) 22.4 L
d) 40.0 L
What volume is occupied by 1 mol of Cl2(g) at SATP?
a) 12.4 L
b) 11.2 L
c) 22.4 L
d) 24.8 L
Answers
The amount of volume will be (1) 23.10 L and ( 2) 22.4 L by using gas law.
What is gas law?
Gas law gave the relation between pressure, volume and temperature.
It can be expressed as:
PV = nRT.
where, P is pressure, R is gas constant and T is temperature.
Calculation of volume by using gas law.
1) Given data:
n = 1 mol
T = 25 degree C = 25 + 273 =
P = 100 kpa
Volume can be determined by the gas law.
PV = nRT
V = nRT/P
V = 1 × 8.31 × 278 / 100
V = 23.10 L
2) It is known that at STP 1 mol of any gas volume will be 22.4 L.
Therefore, the correct answer will be option (c).
To know more about gas law.
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The Moon only emits light at night.
True
False - does not emit light at all
Answers
Answer:
It's trueeeeeee:))))))
Answer:
TRUE
Explanation:
2. What percentage of the offspring
will have the red flowers?
Answers
Answer:
1/4 of the offspeing will have the red flowers
Y’all Someone plz help me with these problems.
Girl I will report if u troll or link
Answers
Answer:
A. 650 moles of sulphur.
B. 30 g of FeS₂
Explanation:
The balanced equation for the reaction is given below:
Fe + 2S —> FeS₂
From the balanced equation above,
1 mole of Fe reacted with 2 moles of S to produce 1 mole of FeS₂.
A. Determination of the mole of sulphur needed for the reaction.
From the balanced equation above,
2 moles of S reacted to produce 1 mole of FeS₂.
Therefore, Xmol of S will react to produce 325 moles of FeS₂ i.e
Xmol of S = 2 × 325
Xmol of S = 650 moles
Thus, 650 moles of sulphur are needed for the reaction.
B. Determination of the mass of FeS₂ produced by the reaction of 0.5 mole of sulphur.
From the balanced equation above,
2 moles of S reacted to produce 1 mole of FeS₂.
Therefore, 0.5 mole of S will react to produce = (0.5 × 1)/2 = 0.25 mole of FeS₂.
Finally, we shall determine the mass of 0.25 mole of FeS₂. This can be obtained as follow:
Mole of FeS₂ = 0.25 mole
Molar mass of FeS₂ = 56 + (32×2)
= 56 + 64
= 120 g/mol
Mass of FeS₂ =?
Mass = mole × molar mass
Mass of FeS₂ = 0.25 × 120
Mass of FeS₂ = 30 g
Thus, 30 g of FeS₂ were obtained from the reaction.
Copper(Ii) Iodate + Potassium Carbonate = Potassium Iodate + copper(I)carbonate into a formula equation ?
Answers
Answer:
Cu(IO3)2 + K2CO3 → 2KIO3 + CuCO3
1. What is a common example of a converging mirror?
2. Where must you (the object) stand in front of a converging mirror if you want to see an upright,
virtual image of yourself? What is the size of the image compared to the object?
3. A converging mirror produces no image when the object is at
4. If the centre of curvature in a converging mirror is at 10cm, the focal point will be at
om
Answers
sorry I don't know 4one
i HOPE IT'S HELP
Which is a property of a covalent compound?
A.being shaped easily
B.good electrical conductivity
C.low melting point
Answers
Answer:
c: low melting point
Explanation:
melting point is dependent on intermolecular forces. in covalent compounds, electrons are shared more equally. this means there is less separation of positive and negative charges within the molecules.
Jose was driving to New York City. He traveled 100 miles in the first hour of the trip and 20 miles in the last hour of his trip. Which can we
say about Jose's drive? (speed = distance = time)
A. Jose drove less than 120 miles.
B. Jose drove faster the first hour of his drive.
C. Jose drove slower the first hour of his drive.
D. Jose drove the same speed for the entire drive.
Answers
Answer:
b
Explanation:
he drove 5x faster than the time was when he was on the last hour (maybe caught in traffic or wasn't in a rush)
A gas has an initial volume of 15 L. If the temperature increases from 330 K to 450 K, what is the new volume.
Answers
Answer:
20.(45)L or about 20.4545L
Explanation:
PV = nRT
Where:
P - pressure
V - volume
n - number of particle moles
R - a constant
T - temperature in K
We can assume the P and n (and definitely R) stay the same, so we infer that
[tex]V_1 = \frac{nRT_1}{P} = 15L\\V_2 = \frac{nRT_2}{P}\\V_1 / V_2 = \frac{nRT_1}{P} / \frac{nRT_2}{P} = \frac{T_1}{T_2}\\\\15L / V_2 = \frac{330K}{450K} = \frac{11}{15}\\\\V_2 = 15L \cdot \frac{15}{11} = 20.(45)L[/tex]