Answer:
(D) The minimal chance that the newly formed neutrons of a fission
Explanation:
I got it right on A P E X
Answer:
D. the minimal chance that the newly formed neutrons of a fission
reaction are absorbed by more atoms.
Explanation:
took test
7. A species is _ when its population has become so low that it is close to becoming extinct
a. Massive logging b. endangered c. pollutants d. population
pa help po,,,
Answer:
Endangered. The meaning of endangered is when a species declines in number- this might be because they are being eaten by another animal which has a higher popupayion, or perhaps because they are being hunted by humans for their meat or fur. Neither reason might be that their food or habitat has been destroyed b humans to create land for farming or housing. one example of name endangered species is Polar Bears: they like in the Antarctic where there is no land, simply ice. Due to humans causing climate change, the world is warming up and the ice is melting. This means polar bears are dying out because it would be too tiring to swim to find ice. For the same reason, other animals are dying in the Antarctic meaning that Poplar Bears have less to eat (being at the top of the food chain -no animal eats polar bears).
Which elements from the list would be likely to form an ionic bond with chlorine, Cl?
Answer:
metal calcium or (Ca).
Explanation:
For example, the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl2). In this compound, there are two negative chloride ions for each positive calcium ion
The single invention of the ______ has advanced what we know about the universe more than any other scientific technology.
CAN SOMEONE HELP ME PLEASE ASAP I WOULD APPRECIATE IT
Answer:
If we subtract 13.4 from 27.6 we will get 14.2 g.
Which best describes a codon?
Answer:
Which best describes a codon? 1. a cell structure that gives the master instructions for an organism 2. a segment of DNA that is the basis of heredity in organisms 3. the sequence of three bases that codes for a specific amino acid 4. the basic unit of structure and function of all living things
Answer:
The Correct answer is C
Explanation:
The sequence of three bases which codes for a specified amino acid.
What is the frequency of a photon whose energy is 3.4 x 10-19 )? (h = 6.626 x 10-34 Js)
Answer:
Frequency of photon is 0.513×10¹⁵ s⁻¹
Explanation:
Given data:
Energy of photon = 3.4×10⁻¹⁹ J
Frequency of photon = ?
Planck's constant = 6.63 × 10⁻³⁴ Js
Solution:
Formula:
E = hf
3.4×10⁻¹⁹ J = 6.626 × 10⁻³⁴ Js × f
f = 3.4×10⁻¹⁹ J / 6.626 × 10⁻³⁴ Js
F = 0.513×10¹⁵ s⁻¹
Frequency of photon is 0.513×10¹⁵ s⁻¹.
The teacher said the volume of the liquid was 500 mL when measured a student found it was 499.7 mL what is the students percent error
Answer:
0.06 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
error = 500 - 499.7 = 0.3
actual volume = 500 mL
We have
[tex]p(\%) = \frac{0.3}{500} \times 100 \\ = \frac{3}{50} \\ [/tex]
We have the final answer as
0.06 %Hope this helps you
Answer the questions below:
1.Give an example of something that has matter.
2.Give an example of something that doesn't have matter.
3.What is the difference between an chemical change and a physical change?
4.What 2 main kind of changes can you observe involve chemical reactions?
5.What is a precipitate?
6.What is the difference between an endothermic reaction and an exothermic reaction?
Answer:
1. An apple is something that has matter.
2. Light does not have matter. It neither has mass or takes up and space.
3. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
4. A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!
5. A precipitate is a solid that forms out of solution.
6. In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.
Explanation:
Matter is anything that has mass and takes up volume.
Answer:
1. some thing that has matter is an apple, a person,a table. things that does 2.not Light.,Sound.,Heat.Energy.Gravity.Time.A Rainbow.Love.
3. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
4.A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!
5.Precipitate: In chemistry, a solid formed by a change in a solution, often due to a chemical reaction or change in temperature that decreases solubility of a solid. In meteorology a precipitate is liquid or solid water (rain, snow, etc.) falling from the sky.
6.n simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.
hope this help plz give me a thxs and brainlyest and a five star thx and you welcome let me know if this helped
Which action is a change in state
a. dissolving
b. tearing
c. stretching
d. condensing
Answer: condensing
Explanation:
Answer:
C
Explanation:
Why does mass decrease when sugar dissolved in water
Answer:
Because the same amount of sugar is still there. The solid sugar crystals break apart in water as the sugar dissolves, but the individual sugar particles or molecules are still present and do not change as a result of dissolving in the water. The combined mass of the sugar and water shouldn't change.
What substitution product will be formed from the SN2 reaction between trans-1-chloro-4-methylcyclohexane and sodium hydroxide?a. cis-4-methylcyclohexanol and sodium chloride b. trans-4-methylcyclohexanol, cis-4-methylcyclohexanol, and sodium chloride c. 4-methylcyclohexanol and sodium chloride d. trans-4-methylcyclohexanol and sodium chloride
Answer:
a. cis-4-methylcyclohexanol and sodium chloride
Explanation:
An SN2 reaction is a concerted mechanism of nucleophilic substitution of an alkyl halide in which there is inversion of configuration of the product.
This inversion of configuration occurs because the entering group attacks the substrate from the backside. In the transition state, both the leaving group and entering group are partially bonded to the substrate in the front and backsides respectively.
Hence, if we start with trans-1-chloro-4-methylcyclohexane, we end up with a product of inverted configuration which is cis-4-methylcyclohexanol and sodium chloride as a byproduct.
Please help I’ll mark brainliest! Chemistry
Answer:
Plum Pudding Model.
Explanation:
I just know.
A scientist finds that a sample of matter contains three types of atoms. The sample can be any of the following, except:
A. compound
B. molecule
C. element
D. mixture
Answer:
The correct answer is C. element
Explanation:
The sample cannot be an element because an element - or elemental substance - cannot be decomposed into simpler substances. Thus, it cannot be composed by differents types of atoms. For example, an element is carbon (C).
As the sample contains three types of atoms, it can be a compound, a molecule or a mixture, because they can be composed by different types of atoms - of different chemical elements. For example, the sample could contain the element carbon (C) combined with other elements, for example oxygen (O) or hydrogen (H), amoing others.
The sample can not be an element due to having only one type of atom.
The sample can be mixture, compound and molecule except element because element is formed from only one type of atoms which can not be broken down into simpler one. The sample contains three types of atoms which means it may be mixture, compound or molecule.
The reason behind this is that mixture, compound and molecule can be made up of three atoms whereas the element can't so we can conclude that sample can not be an element.
Learn more: https://brainly.com/question/19389549
Select the correct answer. Why is it important to include recovery time in a workout program? A. It prevents you from getting bored with the workout. B. It gives balance to your workout program. C. It allows your body time to rest. D. It ensures that overload from the workout will not occur.
Answer:
C) It allows your body time to rest.
Explanation:
Hope this helps!
Answer:
C.) It allows your body time to rest.
Explanation:
PLATO
Which of the substances below would dissociate into ions when dissolved in water? Select all that apply.
A. AgCl
B. NaBr
C. Pb(OH)2
D. KOH
Answer:
B. NaBr
D. KOH
Explanation:
Below is the solubility rules given for you knowledge.
Salts of
Group 1 elements are soluble([tex]Li^+, Na^+, K^+,Cs^+, Rb^+[/tex])Ammonium ion is soluble ([tex]NH4^+[/tex])The nitrate are generally soluble( [tex]NO3^-)[/tex]of Cl- , Br- , and I- are soluble, except Ag+ , Pb+2, and (Hg2)+2most sulfate are soluble, except Ba+2, Ca+2,Pb+2, Ag+, Sr+2.most hydroxide salts are only slightly soluble, except NH+4, Li+, Na+, K+Most carbonates are insoluble (CO3 2-) Except group 1 and NH+4most phosphate are insoluble except group 1 and NH+4so using the rules above
NaBr , KOH are soluble, Pb(OH)2 is slightly soluble and AgCl is not soluble.
Answer:hope this helps had to guess these are the correct answers =)
which of the following has the largest atomic radius mg, be, cl, c, na
Answer:
na
Explanation:
because it has more atomic radius in it
How many bonds would be needed when bonding 2 atoms of nitrogen to achieve a full octet for both atoms?
Answer:
3 bonds are needed.
Explanation:
The electrons that are involved in chemical bonding are those in the outer shell of the highest energy level of the atom. The electron configuration of nitrogen (N) is 1s²2s²2p³. That means thy at each nitrogen atom has 5 valence electrons: 2 electrons in the 2s orbital and 3 electrons in the 2p orbital. To fullfil the octet, each nitrogen atom needs 3 electrons. So, they can share each other 3 electrons to form 3 simple bonds. Therefore, the nitrogen molecule (N₂) has 3 bonds involving 6 bonding electrons or a triple bond.
This is the quetion answer it fast pls
Answer:kingdom 1 i think
Explanation:
What type of bond will magnesium selenide form?
A. A polar covalent bond
B. A covalent bond
C. A nonpolar covalent bond
D. An ionic bond
Answer:
B. a covalent bond.
Which place in the world has the highest average annual precipitation?
Answer: Colombia
Explanation:
If you want to form a kinetic enolate, you want to:______.A. use a strong, non-nucleophilic base such as LDA.B. use a protic solvent.C. use a low temperature.D. both use a strong, non-nucleophilic base such as LDA and use a low temperature.E. both use a strong, non-nucleophilic base such as LDA and use a protic solvent.F. both use a protic solvent and use a low temperature.
Answer:
D. both use a strong, non-nucleophilic base such as LDA and use a low temperature.
Explanation:
The more stable enolate is the thermodynamic enolate, and a less stable is known as the kinetic enolate.
The less stable enolate has a less substituted product, while the more stable product has a more substituted product.
Now, to form a kinetic enolate, we need to choose a strong, non-nucleophilic base such as LDA to attract hydrogen from the less substituted site. However, an increase in temperature results in an increase in a reaction, which leads to the formation of a stable product.
So, to form the kinetic enolate, a low temperature will be required.
Thus, To form a kinetic enolate, both use a strong, non-nucleophilic base such as LDA and use a low temperature.
View the illustration below and label each part.
A
Plzz help
Answer:
a is the peak/ crest
b is the through
c is the amplitude
d is the wavelength
Hi guys, if you could help me on this question? Which number is the right answer?
Answer:
If my memory serves me correctly, the answer would be OPTION 3
Explanation:
May I have brainliest please? :)
Heat transferred by direct contact from one particle of matter to another is know as ____.
Question 13 options:
A. specific heat
B. radiation
C. condensation
D. conduction
Answer:
B
Explanation:
Answer:
radiation
Explanation:
because it move from one particle to another and place to place
Consider the reaction of (R)-2-chloro-3-methylbutane with sodium iodide to form a
product.
1(a) Draw the reaction scheme with the correct stereochemistry (reactant + NaI → product
+ NaCl). Circle the nucleophile and draw a rectangle around the electrophile.
1(b) What is the symbol used for mechanism shown in 1(a)?
1(c) If the sodium iodide was replaced with sodium hydroxide, the product is an ALKENE. Draw a reaction MECHANISM to show how this happens.
1(d) Draw the reaction energy diagram for the reaction in 1(c) and label the activation
energy.
1(e) Using any alcohol with five carbons, and any carboxylic acid with six carbons, draw a
reaction to show how we would make an ester.
1(f) Describe the practical on esters.
Answer:
See explanation and image attached
Explanation:
Now let us consider the reaction closely, The reaction of (R)-2-chloro-3-methylbutane with sodium iodide is an SN2 reaction that occurs with inversion of stereochemistry.
When the OH^- is used, the reaction proceeds by E2 elimination giving the alkene product as shown in the image attached to this answer.
The reaction of a five-carbon alkanol and an acid to form an ester is also shown in the image attached to this answer.
To prepare an ester. the glassware must first be dried. The alkanol and alkanoic acid are added and refluxed in a magnetic stirrer and conc H2SO4 is added. A thermometer should be present in the set up. The refluxing should continue for about 60 minutes.
Lab: Types of Chemical Reactions
Student Guide
This laboratory allows you to study various kinds of chemical reactions, including some that result in precipitates.
Lesson Objectives
• Compare and contrast synthesis, single-displacement, and double-displacement reactions.
PREPARE
Approximate lesson time is 60 minutes.
Materials
• Lab Instructions: Lab_5.08_Instructions_modified_2020
• Lab Report: Lab_5.08_Report_modified_2020
• Lab Guidelines: Lab_Guidelines_modified
LEARN
Activity 1: Types of Chemical Reactions 1
Instructions
As you read through the lesson online, use the space below to take notes.
In this laboratory, you will study different kinds of chemical reactions.
Knowing the types of reactions helps you interpret your observations.
In a synthesis reaction, two reactants unite to form a third product.
In a single-displacement reaction, one ion of a reactant bonds with the second reactant.
In a double-displacement reaction, ions of both reactants change places.
Activity 2: Types of Chemical Reactions 1
Instructions
Procedure
1. Open the Chemical Reactions Virtual Lab.
2. Click View the Tutorial and complete the tutorial to learn how to conduct the lab.
3. Close the tutorial and click begin the Lab.
Part 1 Synthesis Reaction
4. Perform the procedure, placing the magnesium strip in the flame.
5. Record your reaction.
6. Research the chemical reaction of magnesium and oxygen gas. Write an equation for the chemical reaction
that accounts for the observed reaction in this part of the lab.
7. Answer the question: What is a synthesis reaction?
8. Answer the questions on Part 1 in the Lab Report.
Part 2 Single Displacement Reaction
9. Place 1 scoop of zinc in Vial A and add 10 drops of copper (II) sulfate. Observe the reaction.
10. Place ball of aluminum in Vial B and add 10 drops of copper (II) sulfate. Observe the reaction.
11. Place 1 scoop of zinc in Vial C and add 10 drops of silver nitrate. Observe the reaction.
12. Place copper wire in Vial D and add 10 drops of silver nitrate, wait 5 minutes. Observe the reaction.
13. Complete the ta
Answer:
hope this helps
Explanation:
see pictures try to put them in order
If ur car goes 50 kilometers in 2 hours, what is its average speed?
Answer:
25 km per hour
Explanation:
50/2=25
The specific heat of a substance is 0.38 J/goC. How much energy is required to raise the temperature of 42 g of the substance from 25oC to 39oC?
Answer:
223.4J
Explanation:
Given parameters:
Specific heat capacity of substance = 0.38J/g°C
Mass of substance = 42g
Initial temperature = 25°C
Final temperature = 39°C
Unknown:
Energy required to raise the temperature = ?
Solution:
The amount of heat required by the substances can be derived using the expression below;
H = m c Δt
H is the amount of heat energy
m is the mass
c is the specific heat capacity
Δt is the change in temperature;
Δt = 39°C - 25°C = 14°C
Now insert the parameters and solve;
H = 42 x 0.38 x 14 = 223.4J
HELP,QUIZ!!!
Why does your tile floor feel colder on your feet than carpet?
options
-because the tile is a lower temperature than carpet
-because tile conducts energy faster than carpet
-because tile has a smoother texture than carpet
-because tile conducts energy slower than carpet
Answer:
because tiles conduct energy faster than carpet
Explanation:
when it is winter tiles are as coled as ice an carpet is barley coled when left a tile out in the sun I would burn like a stove but if you left a carpeted it would be warm
explain how to balance the chemical equation and classify its reaction type.
___C5H5 +___ Fe ⟶ ___Fe(C5H5)2
Answer: The balanced chemical equation is given below.
Explanation:
Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.
This also means that total mass on the reactant side must be equal to the total mass on the product side.
The balanced chemical equation follows:The balanced chemical equation follows:
On reactant side:
Number of carbon atoms = 10
Number of hydrogen atoms = 10
Number of iron atoms = 1
On product side:
Number of carbon atoms = 10
Number of hydrogen atoms = 10
Number of iron atoms = 1
So, the balanced chemical equation is given above.
Answer:
#1. Balanced equation: 2C₅H₅ + Fe → Fe(C₅H₅)₂
#2. Type of reaction: Synthesis reaction
Explanation:
Balanced equations are equations that obey the law of conservation of mass.
When an equation is balanced the number of atoms of each element is equal on both side of the equation.
Equations are balanced by putting appropriate coefficients on the reactants and products.
In our case, we are going to put coefficients 2, 1 and 1.
Thus, the balanced equation will be;
2C₅H₅ + Fe → Fe(C₅H₅)₂
This type of a reaction is known as synthesis reaction, in which two or more reactants or compounds combine to form a single compound or product.
