If a specimen exhibited 1/8th of the original carbon-14, how many years has it been since that specimen was alive?
If Uranium-240 emits an alpha particle, what does it transmutate into?
A)Thorium -236
B)Thorium-238
C)Plutonium-244
D)Uranium-235
Answer:
d
Explanation:
An 85 kg construction worker has 37 485 J of gravitational potential energy. To the nearest whole number, the worker is___
m above the ground
Answer:
44,1 m
Explanation:
Ep= m * g * h
37485 = 85 * 10 * h
h = 44,1 m
Answer:
The answer is 45 on edge 2020
Explanation:
hope this helps :)
A 25 milliliter sample of HNO2 (aq) is neutralized by 32.1 milliliters of 0.150 M KOH (aq). What is the concentration of the acid? 20 points for you
Answer:
0.193M.
Explanation:
Consider this hydrocarbon. A hexagon. Is this an aromatic hydrocarbon? Why or why not? Yes, because the carbon chain is made up of single bonds. Yes, because the carbon chain is ring shaped. No, because the carbon chain is composed of only a single ring. No, because the carbon chain has no double bonds.
Answer:
C. No, because the carbon chain is composed of only a single ring.
Polycyclicity, having more than a single ring, is a property of only aromatic hydrocarbons. Therefore, if the hydrocarbon is not polycyclic, it is non-aromatic
Explanation:
Cyclic Hydrocarbons
These are organic compounds which are cyclic in structure. The compound cyclohexane involves a ring of six carbon atoms, each of which is also bonded to two hydrogen atoms
Aromatic hydrocarbons are cyclic ring organic compound which are based on the benzene ring structure.
A. If the hexagon contains single bonds, it is non-aromatic.
B. No. Having a ring shape does not on its own determine the aromaticity of a hydrocarbon.
C. Polycyclicity, having more than a single ring, is a property of only aromatic hydrocarbons. Therefore, if the hydrocarbon is not polycyclic, it is non-aromatic
D. Having double bonds within a ring is not a criteria for being aromatic. Both aromatic and non-aromatic hydrocarbons have double bonds within their rings. However, aromatic hydrocarbons have alternate double and single bonds within their 6-carbon ring structure.
Note: Since the structure of the required hydrocarbon is not shown, the explanation contains attachments of hexagonal structures of three hydrocarbons; one non-aromatic and the other two are aromatic. Cyclohexane is non-aromatic while Benzene and the polycyclic compounds are aromatic.
12. How many grams of glucose (C6H1206) is produced if 17.3 mol of H20 is reacted according to this
balanced chemical equation? 6CO2 + 6H20 - C6H12O6 + 602
13. Nitroglycerin (C3H5(ONO2)3] is made by reacting nitric acid (HNO3) with glycerol [C3H5(OH)3]
according to this reaction:
C3H5(OH)3 + 3HNO3 - C3H5(ONO2)3 + 3H20
If 87.4 g of HNO3 is reacted with excess glycerol, what mass of nitroglycerin can be made?
Answer:
1. 17.3 MOLES OF WATER WILL PRODUCE 518.4 G OF GLUCOSE.
2. 87.4 G OF HNO3 WILL PRODUCE 7.86 G OF NITROGLYCERIN WHEN REACTED WITH EXCESS GLYCEROL.
Explanation:
1. How many grams of glucose is produced from 17.3 mole of water?
Equation:
6CO2 + 6H20 ------> C6H12O6 + 6O2
From the reaction, 6 moles of carbon dioxide reacts with 6 moles of water to produce 1 mole of glucose
So therefore,
6 moles of water = 1 mole of glucose
Since 17.3 mole of water was used, we can first calculate the number of moles of glucose produced:
Then, we have:
6 moles of water = 1 mole of glucose
17.3 moles of water = ( 17.3 * 1/ 6) moles of glucose
= 2.883 moles of glucose
So we say 17.3 moles of water produces 2.883 moles of glucose
At standard conditions, 1 mole of a substance is its molar mass
Molar mass of water = 18 g/mol
Molar mass of glucose = 180 g/mol
From the reaction:
17.3 moles of water produces 2.883 moles of glucose
17.3 * 18 g of water produces 2.833 * 180 g of glucose
= 518.94 g of glucose.
From 17.3 mole of water, 518.4 g of glucose will be produced.
2.
C3H5(OH)3 + 3HNO3 -------> C3H5(ONO2)3 + 3H20
3 moles of HNO3 reacts to produce 1 mole of nitroglycerin
Molar mass of HNO3 = ( 1 + 14 + 16*3) = 63 g/mol
Molar mass of nitroglycerin = ( 12 *3 + 1 *5 + 16*6 + 14*3) = 179 g/mol
3 moles of HNO3 = 1 mole of nitroglycerin
3 * 63 g of HNO3 = 179 g of nitroglycerin
if 87.4 g of HNO3 were to be reacted, we have:
189 g of HNO3 = 179 g of nitroglycerin
87.4 g of HNO3 = ( 87.4 * 179 / 189) of nitroglycerin
= 7.86 g of nitroglycerin
So therefore, 87.4 g of HNO3 will produce 7.86 g of nitroglycerin when reacted with excess glycerol.
Boron (B): 1s 2s 2p
E=
F=
G=
Answer:
E=2
F=2
G=1
Explanation: this is the answer promise
Answer:
E=2
F=2
G=1
Explanation:
Which structure shows the correct electron arrangement in CCl4?
A central upper C is single bonded to upper H above, below, and to the left, and single-bonded to upper C l to the right. The C l has three pairs of electron dots, above, right, and below.
A central upper C is single bonded to upper C l to the top, bottom, and left; those upper C l atoms have three pairs of electron dots on the sides away from the bond. The C is also single bonded to an upper H to the right.
A central upper C is single bonded to upper H above and below, and to upper C l to the left and right. The C l have three pairs of dots, above, below, and to the side opposite the bond.
A central upper C is single bonded to upper C l above, right, left, and below. All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond.
Answer:
the correct answer is D.
Explanation:
Got it right on edg. 2020
The correct structure for [tex]CCl_{4}[/tex] will be " All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond."
What is bond?A chemical bond would be a strong bond which could be formed among atoms, ions, as well as molecules to create chemical compounds.
What is electron dots?Lewis dot structures, commonly known as electron dot structures, were schematics showing the interatomic chemical bonds in such a molecule.
The electron dot structure of [tex]CCl_{4}[/tex] is shown below:
It can be seen that each carbon attached by single bond.
The correct structure for [tex]CCl_{4}[/tex] will be " All the Cl atoms have 3 pair of electron dots, on the three sides that do not have the bond."
Therefore, the correct answer will be option (D).
To know more about electron dot structure.
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A well-known scientist testifies that she believes a piece of evidence is accepted by science. The judge rules that the evidence is not, in his opinion, admissible. Which case applies to the decision?
a. Daubert v. Merrell Dow Pharmaceuticals
b. Daubert v. Frye
c. Kumho Tire Co. Ltd. v. Daubert
d. Frye v. United States
Answer:
The correct answer is C:
Kumho Tire Co. Ltd V. Daubert
Explanation:
In this case, the appellant (Daubert) has sued Kumho Tire Co. Ltd (the defendant) when 3 months prior the right rear tyre of his car exploded while the car was in motion killing a passenger and injuring others severely.
The appellant employed the services of an expert who had worked for 10 years with Michelin to give his opinion as having studied the attributes of the tire technology.
In a counter-argument, the defendant rather than dispute the opinion of the expert urged the court to exclude it as evidence because his methodology didn't conform to the requirements of the Law as given in Rule 702 of the Federal Rules of Evidence.
True to the defendants' position, the Law by the ruling in Daubert v Merrell Dow Pharmaceuticals required that for the opinion to count, it had to be scientifically correct. It was hence excluded as evidence in the case.
Cheers!
7. What is the shape of an s orbital?
A dumbbell
B clover leat
C spherical
D donut
Explain the relationship between the observations and the hypothesis
The rows on the periodic table are arranged so that ______ are on the right side and ______ are on the left side.
Non-metals/Metals
Metals/Non-metals
Gases/Metals
Metals/Gases
Answer:
Metals on the right side and non metals on the left side.
The correct answer is; Non-metals/Metals
Metals are found at the left hand side of the periodic table while non metals are found at the right hand side of the periodic table.
The periodic table is an arrangement of elements in order of increasing atomic number according to the modern periodic law.
The elements in the periodic table are arranged in rows and columns. The rows are called periods while the columns are called groups.
Metals are found at the left hand side of the table while non metals are found at the right hand side of the table.
https://brainly.com/question/14310368
eeeeeeeeeeeeeeeeeeeee question in picture
Answer:B
Explanation:
Answer:
Pretty sure it is either B or C.
Explanation:
Hope this helps. LOL.
SOMEONE PLS HELP ITS FOR A TEST!!
4. An ion is an atom that has lost or gained protons.
O True
O False
5. Non-metals are on the right side of the periodic table and they tend to GAIN electrons in ionic bonds.
O True
O False
Explanation:
4=true
5. true
hope this helps. good luck with your test.
Tansition elements form:
A) colorless ions in solution, multiple positive
oxidation states
B) colorless ions in solution, multiple negative
oxidation states
C) colored ions in solution, multiple positive
oxidation states
D) colored ions in solution, multiple negative
oxidation states
**Please I need it fast**
Discribe how to prepare 50.00mL of a 3.00M hydrochloric acid solution using 12.0 M HCl.
Answer:
The answer to your question is given below.
Explanation:
To prepare 50mL of 3M HCl, we must calculate the volume of the stock solution needed. This can obtained as follow:
Molarity of stock solution (M1) = 12M
Volume of stock solution needed (V1) =?
Molarity of diluted solution (M2) = 3M
Volume of diluted solution (V2) = 50mL
The volume of the stock solution needed can be obtained by using the dilution formula as shown below:
M1V1 = M2V2
12 x V1 = 3 x 50
Divide both side by 12
V1 = (3 x 50)/12
V1 = 12.5mL
The volume of the stock solution needed is 12.5mL
Therefore, to prepare 50mL of 3M HCl, we must measure 12.5mL of the stock solution i.e 12M HCl and then, add water to the mark in a 1L volumetric flask. Now we can measure out 50mL of the solution.
Traits are passed from parents to offspring. These traits are determined by
1. chromosomes, located on genes, found in the nucleus
2. genes, located on chromosomes, found in the nucleus
3. chromosomes, located on genes, found in the ribosomes
4. genes, located on chromosomes, found in the ribosomes
The traits that are transferred from the parents to the offspring during reproduction are determined by genes, located on chromosomes, found in the nucleus.
During reproduction, there is a fusion of;
male gametefemale gameteThis leads to the formation of offspring. There is a transfer of traits from the parents to the offspring.
Hence, the traits that are transferred from the parents to the offspring during reproduction are determined by genes, located on chromosomes, found in the nucleus.
Learn more about genes: https://brainly.com/question/787658
Answer:?
Explanation:
What are atoms made of?
1.
Protons and electrons in a nucleus like the sun with neutrons zipping around the
nucleus like planets
2.
Neutrons and electrons in a nucleus like the sun with protons zipping around the
nucleus like planets
3.
Protons and neutrons in a nucleus like the sun with electrons zipping around the
nucleus like planets around the sun
What do you call elemente with th
Answer:
3
Explanation:
Atoms are made of 3 parts.
ProtonsElectronsNeutrons- The protons and Neutrons form together creating a sun, or nucleus at the center
- The electrons orbit this sun like planets.
The element with Th is Thorium. It is a metallic chemical element that when exposed to air, hardens.
PLZ HELP!! I WILL GIVE BRAINLIEST!! 50+PTS!! PLZ HELP!!!! In an exothermic reaction at equilibrium, what is the effect of lowering the temperature? A. The reaction makes more products. B. The reaction makes more reactants. C. The reaction is unchanged.
Answer:
A. your reaction makes more products.
Explanation:
This is a fun question dealing with idea of Le Chatelier's principle.
In an exothermic reaction, you produce heat. This means that heat will act as a product (or be on the product side).
Suppose there's an imaginary equation:
A + B -----> C (Now if I lower the amount of B, the equilibrium will shift to left to make up the lost B, or to bring the system back to equilibrium)
Apply the same concept as above below:
A + B -------> C + Heat (as I mentioned, since this is exothermic reaction heat is written as product, so if you lower the temperature, which means basically lower the heat, the reaction will shift towards right to make up the lost heat, in this process you will make extra C which is products. Thus, your reaction makes more products.
Answer:
reaction makes more product
please help asp its timed
How do radio waves compare to visible light in terms of the energy?
Radio waves carry more energy
Radio waves carry less energy
Radio waves and visible light carry the same energy
Neither radio waves nor visible light carry energy.
Answer:
Radio waves and visible light have many different properties
Explanation:
Radio waves have less energy since it's waves are stretched out really long. the longer the light waves, the lower the energy, and since radio waves have more stretched out waves than visible light, the radio waves carry less energy.
5)
A battery is connected to a motor. The battery releases enough energy to perform 200 J of work, but the motor produces only 90 J.
Why
The battery has a leak
Some energy is released as heat.
The motor is connected improperly.
The motor is connected to the battery in parallel
HELP
Answer:
some energy is released as heat
Answer:
Some energy is released as heat.
Explanation:
hope this helps :)
A news report is an example of what kind of literature?
What type of literature often contains deeper ideas and concepts?
Answer:
1) I dont knoe
2) Poetry
Explanation:
Answer: Symbolic language is used by an author to hint at deeper meanings.
Explanation: penn foster
Write the name of the chemical missing in this equation
calcium carbonate + hydrochloric acid --> calcium chloride + water +............
A)hydrogen
B)oxygen
C)nitrogen
D)carbon dioxide
Answer:
D
Explanation:
the calcium reacts with the chloride in the hydrochloric making calcium chloride.
the hydro in hydrochloric becomes water leaving us with carbonate which turns into carbon dioxide.
(in simple terms)
List the ways in which lightning can be produced
Answer:
Lightning is produced by the rapid transfer of free electrons when one of the following conditions exist:
One part of a cloud is positively charged and a neighboring part of the same cloud is negatively charged.
A positively charged cloud comes near a negatively charged cloud.
A cloud with either a positive charge or a negative charge comes near the earth.
CHEM PLZ HELP
2NaHCO3(s) → Na2CO3(s)+CO2(g)+H2O(ℓ)
If the chemical reaction above is occurring, we would likely observe...
Question 14 options:
Increase in CO2 (g) over time.
No NaHCO3 (s) will be left after a time.
Increase in NaHCO3 (s) over time.
Decrease in Na2 CO3 (s) over time.
Answer:
Increase in CO2 (g) over time.
No NaHCO3 (s) will be left after a time
Explanation:
The reaction, shown below;
2NaHCO3(s) → Na2CO3(s)+CO2(g)+H2O(ℓ) is a decomposition reaction. A decomposition reaction is a kind of chemical reaction in which a given chemical specie breaks up to give other chemical species. Decomposition may be induced by heat or light.
Usually, there is only one reactant in a decomposition reaction; the specie that disintegrates into the products. This reactant usually decreases in concentration steadily because it is converted into products. This is why the mass of NaHCO3(s) in the system continues to decrease steadily until it finally falls to zero.
Conversely, the concentration (for aqueous) or volume (for gases) or mass (for solid) products of the reaction increases steadily as the reaction progresses. This explains why the volume of CO2 in the system will steadily increase over time.
What do acids do in solution?
O A. They increase the pH.
O B. They form hydroxide ions.
O C. They increase the [H").
O D. They dissociate into salts.
Answer:
C.
Explanation:
The increase the [H+] (concentration of H+ ions)
However, they decrease the pH if acids are added to any solution. Since they have more [H+] ions, they increase their conc. in the solution
What is a decomposition reaction?
A. Two reactants break apart and combine as new products
B. One reactant break down to form more than one product
C. One reactant replaces an element in another reactant
D. Two reactants combine to form a single ew product.
(The answer is B)
Answer:
According to A pex, the answer is B.
Explanation:
Because its right.
When one reactant breaks down to form more than one product is a decomposition reaction. Therefore, option (B) is correct.
What is a decomposition reaction?A decomposition reaction can be described as a reaction in which a compound breaks down into two or more simpler compounds. The general form to represent a decomposition reaction is:
AB → A + B
Most decomposition reactions need input energy in the form of light, heat, or electricity.
Binary compounds can be described as compounds made of just two elements. The simplest type of decomposition reaction is when a binary compound dissociated into its elements. For example, Mercury (II) oxide decomposes when heated to form mercury and oxygen gas.
2HgO(s) → 2Hg (l) + O₂(g)
A reaction is a decomposition reaction even when one or more of the products are compounds. For example, calcium carbonate decomposes into carbon dioxide gas and calcium oxide.
[tex]CaCO_3(s) \longrightarrow CaO(s)+CO_2(g)[/tex]
Learn more about decomposition reactions, here:
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Eva wants to overcome her internalized racism. Which action will help her do so ?
OA. She should make friends only with people like her so that she can avoid hearing hurtful comments.
B. She should take an active role in identifying people who can serve as her role models.
OShe should blame others for making her feel the way she does.
OD. All of the above
THE OTHER PERSON IS WRONG TRUST ME
THE ANSWER IS C. I TOOK THE TEST MYSELF AND GOT A %100.
Tansition elements form:
A) colorless ions in solution, multiple positive
oxidation states
B) colorless ions in solution, multiple negative
oxidation states
C) colored ions in solution, multiple positive
oxidation states
D) colored ions in solution, multiple negative
oxidation states
Answer:
C. Because transition elements has 4 special chatacteristics
forms colored ions
has multiple oxidation numbers
forms complex ions
can act as catalyst
I'm completely lost and cant find the answer
Answer:
Option B. 4.5g
Explanation:
The balanced equation for the reaction is given below:
2Na + 2H2O —> 2NaOH + H2
Next, we shall determine the mass of Na and the mass of H2O 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 H2O = (2.02x1) + 16 = 18.02g/mol
Mass of H2O from the balanced equation = 2 x 18.02 = 36.04g
Molar mass of H2 = 2.02 x 1 = 2.02g/mol.
Mass of H2 from the balanced equation = 1 x 2.02 = 2.02g
From the balanced equation above,
46g of Na reacted with 36.04g of H2O to produce 2.02g of H2.
Next, we shall determine the limiting reactant. This is illustrated below:
From the balanced equation above,
46g of Na reacted with 36.04g of H2O.
Therefore, 120g of Na will react with = (120 x 36.04)/46 = 94.02g of H2O.
From the calculations made above, we can see that it will take a high mass of H2O i.e 94.02g than what was given i.e 80g to react completely with 120g of Na. Therefore, H2O is the limiting reactant and Na is the excess reactant.
Finally, we shall determine the mass of H2 produced from the reaction as follow:
The limiting reactant will be used in this case as it will give the maximum yield of H2 since all of it is used up in the reaction.
From the balanced equation above, 36.04g of H2O reacted to produce 2.02g of H2.
Therefore, 80g of H2O will react to produce = (80 x 2.02)/36.04 = 4.5g of H2.
Therefore, 4.5g of H2 is produced from the reaction.
