Answer:
743456478697
Explanation:
Answer:
Exactly 0.3 kg
Explanation:
This is the right answer
In one type of cell division, a single cell forms two new cells. This process is called mitosis. What is a reason that human skin cells frequently undergo mitosis?
Answer:
Explanation:
probably C
Must all species reproduce in order for the species to survive? *
Answer:
no
Explanation:
Which ingredient would a company that makes super-sour candy most likely use in large quantities?
nitric acid
zinc hydroxide
citric acid
calcium hydroxide
Answer:
Citric acid
Explanation:
Answer:
On edge it is C or option 3 citric acid
Explanation:
1. (04.01 LC)
Which of the following is an example of how science can solve social problems? (5 po
It cathstop excessive rain from occurring.
It can identify the sources of polluted water.
It can control the time and day when cyclones happen.
It can reduce the frequency of severe weather conditions.
2. (04.01 LC)
Science is used to stop things the are incrediblu diffucult to deal with therefore jeg spiser ikke dreng
The answer is
It can identify the sources of polluted water.
Which of the following is physical change!?
a. dissolving
b. evaporating
c. bending
d. all of the above
To Become or cause to become incorporated into a liquid so as to form a solution.
Evaporation:The process of changing from liquid to vapour.
Bending:To shape or force something straight, in a curve or angle.
___________________________________
Guys help me pls
Which of type of elements are mainly gases at room temperature, dull and
brittle with low melting points?
Helium is an unreactive gas and neon is a gas of extremely low reactivity.what if anything do their atom have in common?
Answer:
It belongs to the last group with all the gas whose last shell are common and they are unreactive unlike to other elements which reacts to complete there last shell with total 8 electrons . Helium and Neon have in common that they have there shell complete and they reacts very less or they don't.
Explanation:
Hope it is helpful....
Using the mass of baking soda that you used this lab, calculate the theoretical (expected) yield of NaCH3COO in grams ?
Mass of baking soda - 4.5 g
Answer:
4.4 g
Explanation:
The equation of the reaction is;
NaHCO3 (aq) + CH3COOH (aq) ----> CO2 (g) + H2O (l) + CH3COONa (aq)
Mass of baking soda - 4.5 g
Molar mass of NaHCO3 = 84.007 g/mol
Number of moles of baking soda= 4.5 g/84.007 g/mol = 0.0536 moles
If 1 mole of NaHCO3 yields 1 mole of CH3COONa
0.0536 moles of NaHCO3 also yields 0.0536 moles moles of CH3COONa
Hence;
Theoretical yield of CH3COONa = 0.0536 moles * 82.0343 g/mol = 4.4 g
Guys please I need an answer for this asap
Mg+2HCl -> MgCl+H2
0.2 mole of mg reacted with 0.2 of HCl
What is the mass of hydrogen gas produced?
How does Gregor Mendel's work with pea plants affect human life today?
O A. People continue to cross pea plants to fix Mendel's many experimental mistakes.
B. People use Mendel's knowledge of DNA and chromosomes to create new species.
O C. People use the strains of pea plants that Mendel developed as a major food source.
D. People continue to selectively breed plants and animals to produce predictable results.
Answer:
D. People continue to selectively breed plants and animals to produce predictable results.
Explanation:
Gregor Mendel's work with pea plants affect human life today as a result of his ability to produce different results and genetic composition of pea plants through his crossing methods.
This laid the foundation for people today to continue to selectively breed plants and animals to produce predictable results which has lots of advantages associated with it.
If today is October 12th and we view a first quarter, on what date will we observe the next third quarter? i need help asap i will give 15 points
Answer:
It would be October 15th
Explanation:
What electrical energy converted inside a toaster?
Choices:
A. thermal energy and light
B. nuclear energy
C. chemical energy
D. kinetic energy
FOR BRAIN
Answer:
A. Thermal enerfy and light
Explanation:
Answer:
A
Hopefully this helped! :D
-LavenderVye
A storm is moving toward your house at a speed of 20km/h. It is now
60km away from your house. In what time will the storm reach your
house? Remember to put the correct units too. *
Answer:
it will reach the house in 3 hours
Explanation:
20km x 3h = 60km
The rate of motion or the speed of an object is commonly expressed in.
A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car’s average acceleration.
Answer:
1 : 10
Explanation:
For every second the car accelerates 10km/h
Alcohols are flammable, suggest how the mixture of alcohols should be safely heated so that ethanol can be collected
Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?
a
о
Нc— c— СТ.
Oь
o=
H— С—Н
нан
H— C— N
н н
н
0
1
— С—С
1
н н
Answer:
Explanation:
hc-- c--ct
The correct answer is option A: CH3COCH3
Hydrogen bonding occurs when hydrogen is directly bonded to a highly electronegative atom.
Hydrogen bonding is one of the intermolecular interactions. It occurs only when hydrogen is bonded to a very electronegative atom in a molecule. Hydrogen bonding can occur between two molecules of the same type(intermolecular hydrogen bonding) or within the same molecule (intra molecular hydrogen bonding). In either case, the bonding is polar as hydrogen is attached to the electronegative atom via a non-covalent bonding interaction.
Looking at the structures in the question attached, CH3COCH3 does not have any hydrogen atom directly attached to a highly electronegative atom hence CH3COCH3 does not exhibit hydrogen bonding.
Hydrogen bonding in water is shown in the image attached.
For more about hydrogen bonds, see
https://brainly.com/question/10904296
8. Which element is most likely to form an ions with a +3 charge?
Li
Sr
Kr
Fe
Answer:
Fe
Explanation:
Genevieve and Alden each filled a plastic jug half-full of room temperature water. Genevieve put her jug on a sunny windowsill. Alden put his jug in a cool cupboard. After two hours, what did they observe?
Answer:
After two hours, it is observed that Genevieve's Jar has less water than that of Alden.
Explanation:
The water in Genevieve's Jar didn't disappear. It was not drunk by the birds, it simply evaporated. Evaporation is what happens to liquid when they are heated. Water has three states: Solid (that is Ice), Liquid (that is the water which was put in the jar), and gas (vapor).
When water is exposed to heat sources like the sun, its molecules vibrate faster and escape into the atmosphere in form of vapor if the container has an opening.
When this happens for a prolonged period of time, the amount of water in the jar or container becomes less and less in volume.
This is not the case for the jar that was stored in a cool place where the water molecules remained stable.
Cheers
A carbon-oxygen double bond in a certain organic molecule absorbs radiation that has a frequency of 6.00 x 1013 s-1. What is the wavelength of this radiation? To what region of the spectrum does this radiation belong? What is the energy of this radiation per photon? Per mole of photons? A carbon-oxygen bond in a different molecule absorbs radiation with a frequency equal to 5.40 x 10^13 s^-1. Is this radiation more or less energetic?
Answer:
5.0X10 -6 M-
Explanation:
The second radiation is less energetic than the former because it has a longer wavelength.
Recall that;
c = λf
c = Speed of light
λ = wavelength
f = Frequency
Now;
λ = c/f = 3 × 10^8 m/s/6.00 x 10^13 s-1
λ = 5 × 10^-6 m
Also;
When f = 5.40 x 10^13 s^-1
λ = c/f = 3 × 10^8 m/s/5.40 x 10^13 s^-1
λ = 5.6 × 10^-6 m
This radiation is less energetic than the former because it has a longer wavelength.
Learn more: https://brainly.com/question/10038290
is neutralizing a base, physical or chemical property?
Answer:
I think it is chemical because neutral makes me think of acidity, which is a chemical property.
Acidified solutions of sodium dichromate, K 2 Cr 2 O 7 , and copper (I) bromide, CuBr, are mixed.
Answer:
[tex]Cr_2O_7^{2-}(aq)+2Cu^+(aq)\rightarrow Cu_2Cr_2O_7(s)[/tex]
Explanation:
Hello!
In this case, when writing net ionic equations, we first need to identify the complete molecular equation; thus for potassium dichromate reacting with copper (I) bromide, we have:
[tex]K_2Cr_2O_7(aq)+2CuBr(aq)\rightarrow Cu_2Cr_2O_7(s)+2KBr(aq)[/tex]
Thus, since all the species are aqueous except copper (II) dichromate, we can write the complete ionic equation by ionizing the aqueous ones:
[tex]2K^++Cr_2O_7^{2-}+2Cu^++2Br^-\rightarrow Cu_2Cr_2O_7(s)+2K^++2Br^-[/tex]
Finally, for the net ionic equation, we need to cancel out the spectator ions as they are present at both reactants and products sides, thus, we obtain:
[tex]Cr_2O_7^{2-}(aq)+2Cu^+(aq)\rightarrow Cu_2Cr_2O_7(s)[/tex]
Best regards!
2. The smaller numbers in the image below
represent
-2H
2
a) I don't know, and don't want to try
b) Coefficients
c) Subscripts
d) none of the answers are correct
Explanation:
The smaller numbers in the image below represents the subscripts.
What mass of water would be produced if 1.5 g of ethanoic acid was reacted completely with sodium hydroxide (3 marks)
Mass of water : 0.45 g
Further explanationGiven
1.5 g ethanoic acid
Required
Mass of water
Solution
Reaction
CH₃COOH + NaOH ⇒H₂O + CH₃COONa
mol CH₃COOH(MW=60 g/mol) :
= mass : MW
= 1.5 : 60
= 0.025
mol H₂O from the equation :
= 0.025(mol ratio CH₃COOH : H₂O= 1 : 1)
Mass of water :
= mol x MW water
= 0.025 x 18 g/mol
= 0.45 g
Describe the function of the PNS and
the CNS.
Answer: PNS, CNS is
Periferal nervous system. Central nervous system.
Explanation:
How would you name the number:100 liters?
A. Dekaliter
B. Hectoliter
C. Centiliter
D. Megaliter
E. Other
Answer:
E
Explanation:
Please Answer the Question
Answer:
Explanation:
I think it is D
If an element has three isotopes with known natural abundance percentages,
what other information is needed to find the average atomic mass of the
element?
A. The average mass of the isotopes
B. The atomic number of each isotope
C. The mass of each isotope
D. The sum of the masses of the isotopes
Properties of Gamma rays?
Helpppppppp!!!!!
Some of the properties are:
1. Gamma, γ-rays are not deflected by electric and magnetic fields. It shows that they do not have any charge.
2. Gamma, γ-rays are electromagnetic waves like X-rays. The wavelength of γ-ray photon is smaller than that of X-rays.
3. The rest mass of a Gamma, γ-ray photon is zero. (Photon has mass zero but it has momentum, why?)
4. Gamma, γ-rays travel with the speed of light.
5. Gamma, γ-rays have very large penetrating power. They can pass through several centimeter of iron and lead.
6. Gamma, γ-rays can produce fluorescene in a substance like willimite.
Calculate the second volumes. 980 L at 71 C and 107.2 atm to 13 C and 59.3 atm
The second volume : V₂= 1472.9 L
Further explanation
Given
980 L at 71 C and 107.2 atm
13 C and 59.3 atm
Required
The second volume
Solution
T₁ = 71 + 273 = 344 K
P₁ = 107.2 atm
V₁ = 980 L
P₂ = 59.3 atm
T₂ = 13 + 273 = 286 K
Use combine gas law :
P₁V₁/T₁ = P₂V₂/T₂
Input the value :
107.2 x 980/344 = 59.3 x V₂/286
V₂= 1472.9 L
