Answer:
CuSO4 + Fe
Explanation:
this is because Cu will displace Fe from it's position
Mass number is the number of?
Answer:
mass is the amount of matter in an object
Explanation:
Which scientist first applied DNA Analysis techniques to crime scene evidence?
a)Tommy Lee Andrews
b)Colin Pitchfork
c)Stephen Jones
d)Alec Jeffreys
What is a technique for gene therapy?
Answer:
For gene therapy, stem cells can be trained in a lab to become cells that can help fight disease. Liposomes. These fatty particles have the ability to carry the new, therapeutic genes to the target cells and pass the genes into your cells' DNA.
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The element that doesn't occur in elemental state in nature is
Answer:
technetium, atomic number 43; promethium, number 61; astatine, number 85; francium, number 87; neptunium, number 93; and plutonium, number 94.
Explanation:
Draw a structural formula for the more stable carbocation intermediate formed in the reaction shown.
A carbocation is a carbon atom that bears a positive charge. The most stable carbocation here must be a secondary carbocation .
What is a carbocation?A carbocation is a carbon atom that bears a positive charge. These species pften pccur as intermediates in a chemical reaction and can be detercted spectroscopically.
The most stable carbocation here must be a secondary carbocation hence, the structural formula for the more stable carbocation intermediate formed in the reaction is shown in the image attached.
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please answer thank tou
Answer:
ion
Explanation:
more protons than electrons
I need a mnemonic for the reactivity server of metals please
Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Nickel
Tin
Lead
Hydrogen
Copper
Mercury
Silver
Gold
Platinum
Explanation:
Lithium Sodium Potassium group 1
Hydrogen proton +1
Iron Fe2+
What component of the human epidermis functions to make the skin's surface extremely tough and resistant to bacterial enzymes?
keratin
proteases
dermis
hypodermis
Answer:
Keratin :)
Explanation:
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Check all reasons why a book was used.
it increased pressure on the gas.
it supported additional weights.
it balanced the syringe.
We can confirm that for the experiments regarding Boyle's law, the book was used to increase pressure on the gas and add additional weight.
Why is the book used in these experiments?The book is used for the reasons described in options 1 and 2 of the question. The book supports additional weights on the container, meaning that through these added weights we can increase the pressure being applied to the gas and see how said pressure affects the volume of a gas.
Therefore, we can confirm that the book was used to increase pressure on the gas and add additional weight.
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Answer: A, B
Explanation: edge2023
How may using sorbents to clean an oil spill be helpful to the ecosystem?
Answer:
Are sorbents good for the environment?
Natural Inorganic Sorbents
Second, sorbents that sink should not be used as they could be harmful to the environment. Sinking is a problem with many sorbents, such as untreated peat moss, most inorganic sorbents, and many wood products.
Its major result is to clean out some surface contaminants, which makes it simpler for oil to absorb. On the other hand, pyrolysis, a high-temperature thermal treatment, causes the sorbent to carbonise. In turn, this greatly improves the oil sorption capacity and oil to water selectivity.
What are the advantages of using sorbents?When recovering adsorbent materials that cause secondary contamination, lighter, less viscous oil is lost through the pores more readily than heavier, more viscous oils. Application is simple because sorbents can be applied automatically or manually to spills using blowers or fans.
The best sorbents for recovering oil are typically synthetic ones. In some circumstances, a weight ratio of 40:1 for oil to sorbent can be reached, as opposed to 10:1 for organic compounds and only 2:1 for inorganic materials.
A substance used to absorb or adsorb liquids or gases is known as a sorbent. Examples comprise: a substance that works via adsorption and is comparable to molecular sieve material (attracting molecules to its surface). It has strong thermal conductivity and a big interior surface area.
Thus, On the other hand, pyrolysis, a high-temperature thermal treatment, causes the sorbent to carbonise.
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what is the result of cell division that includes mitosis?
A. new cells with different chromosomes
B. four cells with new chromosomes
C. two identical new cells
D. one genetically different cell
Answer:
I think C is the answer
Explanation:
because Mitosis results in two identical daughter cells......
I need help with this one.
Magnesium and Calcium Oxide
Trick : Reactants are always on left
Answer:
magnesium and calcium oxide
Explain how DNA can provide some evidence for evolution.
The shared ancestry of life is reflected in DNA and genetic code. DNA comparisons can reveal how closely two species are related. Biogeography. Evolution and geological change are reflected in the global distribution of life and the particular characteristics of island species.
Is iron conducting electricity a physical, or chemical change?
Answer:
Its a chemical conducting electricity
To what volume should 0.0667 mol of KCl be diluted in order to prepare a 0.250 M solution?
To prepare 0.250 M solution, the 0.0667 mol of KCl should be diluted up to 266.8mL
StoichiometryFrom the question,
We are to determine to what volume the KCl should be diluted, in order to prepare 0.250 M solution
From the formula,
Numer of moles = Concentration × Volume
Then, we can write that
[tex]Volume= \frac{Number\ of\ moles}{Concentration }[/tex]
From the given information,
Number of moles = 0.0667 mole
Concentration = 0.250 M
Then,
[tex]Volume = \frac{0.0667}{0.250}[/tex]
Volume = 0.2668 L
Volume = 266.8 mL
Hence, to prepare 0.250 M solution, the 0.0667 mol of KCl should be diluted up to 266.8mL
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Why is it possible to compress a gas
Answer:
Gas can be compress easily than liquid or solid because, molecules are more spread in gas than solin or liquid.
Brainliest if this helps you. please
How many nitrate ions are in 2 mol of iron (II) nitrate
Answer:
Two
Explanation:
Nitrate has a charge of negative 1 and the Iron (II) tells us the iron in that formula has a charge of +2, so in order for the iron to have to equal positive two, there has to be two negative. Since on nitrate ion is -1, you need two to make -2.
What is the mode of action of sulfonamides?
inhibition of protein synthesis
inhibition of cell wall synthesis
disruption of folic acid synthesis
disruption of membrane structure
Answer:
b is the correct answer inhibition of cell wall
Hey there!
Sulfanilamide is the classification of the antibiotics that can target the bacteria that’s causing infections.
But the action of the mode of sulfanilamide is: binding of a specific enzyme which simply translates to inhibition of the cell wall
Thus, your answer is: inhibition of cell wall synthesis (Option B.)
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)
Consider the following reaction: 2 Bi(s) + 3 Cl2(g) → 2 BiCl3(s)
How many grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is
produced? Use correct significant digits and units, for example 1.234 g.
Taking into account the reaction stoichiometry, 1.119 grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is produced.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Bi + 3 Cl₂ → 2 BiCl₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Bi: 2 molesCl₂: 3 moles BiCl₃: 2 molesThe molar mass of the compounds is:
Bi: 209 g/moleCl₂: 70.90 g/moleBiCl₃: 315.45 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Bi: 2 moles ×209 g/mole=418 g
Cl₂: 3 moles ×70.90 g/mole= 212.7 g
BiCl₃: 2 moles ×315.45 g/mole= 630.9 g
Mass of Cl₂ requiredThe following rule of three can be applied: If by reaction stoichiometry 630.9 grams of BiCl₃ are formed by 212.7 grams of Cl₂, 3.32 grams of BiCl₃ are formed by how much mass of Cl₂?
[tex]mass of Cl_{2} =\frac{3.32 grams of BiCl_{3}x212.7 grams of Cl_{2} }{630.9 grams of BiCl_{3}}[/tex]
mass of Cl₂= 1.119 grams
Finally, 1.119 grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is produced.
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Please help !!!!! I need this for Chemistry class
Answer: Silver has the highest temp. change and water has the lowest temp. change.
Explanation:
According to the specific heat capacity, water has lowest specific heat and greatest is that of silver owing to their temperature differences.
What is specific heat capacity?
Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.It is different for different substances.
It is given by the formula ,
Q=mcΔT
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calculate the oxidation state of the underlined elements of K2 Cr2 O7
-----
Answer:
+4
Explanation:
In PbO2, oxygen exhibits an oxidation number of -2 (since it's not a peroxide or superoxide):
Let the oxidation number of Pb be x. Then, for the compound to be neutral, the oxidation numbers of all atoms should add up to zero.
⇒ x + (−2) + (−2) = 0
x = +4
So the oxidation no. of Pb is +4.
I hope this helps.
giving brainliest please help!
Answer:
pretty sure it is
2
1
2
3
1
2
Explanation:
A liquid has an empirical formula CCl2, and a boiling point of 1 21 oC. When vapourised, the gaseous compound has a density of 4.93 g/L at 785torr and 1 50oC. What is the molar mass of the compound and what is its molecular weight?
Based on the data given, the molar mass of the gas is 165.5 g/mol while the molecular weight of the gas is 165.5 amu
How can molar mass of a gas be obtained from density, temperature and pressure?The molar mass of a gas can be obtained from density, temperature and pressure using the formula below:
molar mass = density × molar gas constant × temperature/pressureMolar gas constant, R = R = 0.082 L.atm/mol/K.
Temperature = 150 °C = 423 K
Pressure = 785 torr = 1.033 atm
density = 4.93 g/L
molar mass of gas = 4.93 × 0.082 × 423/1.033
molar mass of gas = 165.5 g/mol
Then, molecular weight of the gas = 165.5 amu
Therefore, the molar mass of the gas is 165.5 g/mol while the molecular weight of the gas is 165.5 amu
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Which is the goal of technology?
to expand comprehension
to make life easier
to apply knowledge
to improve communication
Answer:
B. To make life easier.
Explanation:
Although all of the above makes sense, the answer should be B. because it is to help improve how we live.
I hope it helps! Have a great day!
Muffin~
The goal of technology is to make life easier.
What is goal?A goal is "an idea of the future or desired result that a person or a group of people envision, plan and commit to achieve".
What is technology?
Technology is "the use of scientific knowledge for practical purposes or applications, whether in industry or in our everyday lives".
Hence, the goal of technology is to make our life better.
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What are the five major lines of latitude?
Answer: Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn, and the Antarctic Circle. Hope this helps.
What is the pressure in atm of a 5. 00 l tank with 2. 50 moles of oxygen
at 39. 3 °c?
1
4
7
Answer:
1
Explanation:
NEED HELP ASAP!!! WILL MARK BRAINLIEST!!! A scuba tank can hold 18 L of air 6 atm of pressure. If the gas were to be released all underwater at 4 atm, it would take up how much volume assuming that the temperature remained constant?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
If temperature remains constant, then we can apply the formula :
[tex]\qquad \tt \dashrightarrow \:p_1v_1 = p_2v_2[/tex]
[tex]\qquad \tt \dashrightarrow \:4 \times v_1 = 6 \times 18[/tex]
[tex]\qquad \tt \dashrightarrow \: v_1 = 108 \div 4[/tex]
[tex]\qquad \tt \dashrightarrow \:v_1 = 27[/tex]
So, the required volume is 27 litres
What do the following organic chemicals have in common glyphosphate, lindane, 2,4-d, chlordane
Glyphosphate, lindane, 2,4-d, chlordane are organic compound that have chlorine in common.
What is Organic compound?Organic compound are group of chemical substance that have carbon and hydrogen atoms in which the bonds are covalently linked together.
Therefore, Glyphosphate, lindane, 2,4-d, chlordane are organic compound that have chlorine in common and these chemicals are use as herbicides that is kill weeds, or to kill insects or pests because of chlorine present in it.
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Can someone please help me?? :(
Answer:
A and B is the answer
Answer:
option b
Explanation:
What is an ionic solid?
A. A crystalline solid held together by a shared electron pool
B. A crystalline solid held together by dipole-dipole forces
C. A crystalline olid held together by covalent bonds
D. A crystalline solid held together by charge attractions
Answer:
D
Explanation:
An ionic solid is a crystalline solid held together by charge attractionsAn example is a salt crystal (Na⁺ + Cl⁻ → NaCl)An ionic solid is a crystalline solid held together by charge attractions or an ionic bond.
What is an ionic bond?
Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between the atoms resulting in the formation of ions.
When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge and forms an ion called the anion.
As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.They are good conductors of heat and electricity. They have high melting points. These compounds are brittle.
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