Explanation:
As a water is heated from 46°C to 102°C, the particle arrangement of the water molecules changes.
Water at 45°C is in liquid form. The molecules are still attached to one another and flows. Water heated through and now 102°C is now steam or vapor. The molecules have no attractive force between them again. These molecules are now in gaseous state. Also, they have become randomized.We use the term evaporation to describe this kind of change.
answer: the substance will change from a liquid state to a gaseous state
explanation: 46 degrees celsius means that the particles are in a liquid state, when the particles are heated up to 102 degrees celsius, it means that the particles are now in a gaseous state
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.
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
how many hydrogens are in carbon tetrahydride?
Answer:
4
Explanation:
Carbon tetrahydride is better known as methane.
Methane is an alkane with a chemical formula CH₄. It is a gaseous organic compound.
Within the compound, there is a central carbon atom. Which is bonded covalently to 4 hydrogen. So, there are 4 hydrogens in a carbon tetrahydrideWhat 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.
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.
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
1. Which statement is true about the Milky Way Galaxy?
O It is an irregular galaxy.
O It is a spiral galaxy.
It contains no more than 100 million stars.
New stars are not being created in it.
Answer:
Answer choice B. It is a spiral Galaxy
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.
the oldest rock on the bottom and newest on the top is called ____________
law of superposition
law of position
Law of gravity
Answer:
Law of position
Explanation:
Answer:
Law of Superposition
Explanation:
"A major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence."
If the volume of an irregular sound is determined by the water displacement technique, its volume will be equal to
Jaxson needs to react 16.3 moles of copper (II) nitrate, Cu(NO3)2, in a chemical reaction. How many grams of crystals
does he need to weigh out?
Answer:
3056.25g
Explanation:
Problem here is to find the mass of Cu(NO₃)₂ to weigh out to make for the number of moles.
Given;
Number of moles = 16.3moles
Unknown:
Mass of Cu(NO₃)₂ = ?
Solution:
To find the mass of Cu(NO₃)₂, use the expression below;
Mass of Cu(NO₃)₂ = number of moles x molar mass
Let's find the molar mass;
Cu(NO₃)₂ = 63.5 + 2[14 + 3(16)]
= 63.5 + 2(62)
= 187.5g/mol
Mass of Cu(NO₃)₂ = 16.3 x 187.5 = 3056.25g
A solution is made by adding 27 g of barium chloride into 74 g of water. What is the mass percentage of this barium chloride in this solution, to the units place?
Answer:
27 %
Explanation:
Step 1: Given data
Mass of barium chloride (solute): 27 gMass of water (solvent): 74 gStep 2: Calculate the mass of the solution
The mass of the solution is equal to the sum of the mass of the solute and the mass of the solvent.
m = 27 g + 74 g = 101 g
Step 3: Calculate the mass percentage of this barium chloride in this solution
We will use the following expression.
%m/m = mass of barium chloride / mass of solution × 100%
%m/m = 27 g / 101 g × 100%
%m/m = 27 %
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
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
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.
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.
Question: How does mass and volume affect sinking and floating?
Please don't plagiarize
.....
If you were travelling outward from the earth in a space shuttle at an altitude of 88.4 km you would be in the ----------
Answer:
air
Explanation:
you would be going through air
If you were travelling outward from the earth in a space shuttle at an altitude of 88.4 km you would be in the air.
What is altitude ?The height of a celestial object above the horizon, as opposed to its vertical elevation above the surface of a planet or natural satellite (such as the ocean or land).
Space grew taller, height is the perpendicular elevation of an object over its base, the ground, a specific level, or one object over another. For example, the altitude of a mountain or a bird above a tree's top are examples of height.
A triangle's altitude is determined by drawing a perpendicular line from its vertex to its opposite side. The altitude, sometimes referred to as the triangle's height, forms a right-angle triangle with the base.
Thus, when travelling outward from the earth in a space shuttle at an altitude of 88.4 km you would be in the air.
To learn more about altitude refer the link below;
https://brainly.com/question/4390102
#SPJ2
what happens when you add acetic acid vinegar and sodium bicarbonate baking soda nahco
Explanation:
oh shi sorry I wish I could help but I'm stupid
This is the quetion answer it fast pls
Answer:kingdom 1 i think
Explanation:
write your own definition of the word “particle” as it used in chemistry.
please do it now!! do not COPY from the internet.
Explanation:
Its a particle that can come from loads of things like mass for example, or gas, liquid or solid
A huge rock at the part gets really hot during the day because of what
Which event always involves a chemical change?
Answer:
BurningExplanation:
A teaspoon of dry coffee crystals dissolves when mixed in a cup of hot water. This process produces a coffee solution. Which term best identifies how the original crystals are classified?
-Reactant
-product
-solvent
-a solute
Answer:
The correct answer is - solute.
Explanation:
A solute is one half of a solution that is dissolved in the other half of the solution, known as the solvent. Solute particles are always less or lower in quantity or concentration than the solvent in a solution.
In this case, coffee crystals are dissolved in hot water so the solute will be coffee crystals and the amount of coffee crystals are also less than the amount of solvent.
Answer:
solute
Explanation:
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).
If ur car goes 50 kilometers in 2 hours, what is its average speed?
Answer:
25 km per hour
Explanation:
50/2=25
can someone plz plz plz help me with my science question on my page!!!
Answer:
yesssssssssss
Explanation:
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.
Question 11
What/mass of oxygen is needed to fill a 585 L tank at STP?
0.417 kg
0.835 kg
0.765 kg
Answer:
0.835 Kg
Explanation:
We'll begin by calculating the number of mole of oxygen that will fill 585 L tank at STP. This can be obtained as follow:
1 mole of oxygen (O2) occupies 22.4 L at STP.
Therefore, Xmol of oxygen will occupy 585 L tank at STP i.e
Xmol of oxygen = 585/22.4
Xmol of oxygen = 26.12 moles
Next, we shall determine the mass of 26.12 moles of oxygen. This can be obtained as follow:
Mole of O2 = 26.12 moles
Molar mass of O2 = 2 × 16 = 32 g/mol
Mass of O2 =?
Mole = mass /Molar mass
26.12 = mass of O2 /32
Cross multiply
Mass of O2 = 26.12 × 32
Mass of O2 = 835.84 g
Finally, we shall convert 835.84 g to Kg. This can be obtained as follow:
1000 g = 1 Kg
Therefore,
835.84 g = 835.84 g × 1 Kg / 1000 g
835.84 g = 0.835 Kg
Thus, 835.84 g is equivalent to 0.835 Kg.
Therefore, the mass of oxygen needed to fill the 585 L tank at STP is 0.835 Kg
Of the molecules below, only ________ is polar.a. SiCl4 b. CH4 c. CCl4 d. SeF4
Answer:
SeF4 is a polar molecule
Explanation:
SeF4 is a polar molecule because a polar molecule is any molecule that have lone pairs of electrons in the central atom or have atoms that are electronegative and the electrons between that are covalently bonded are not evenly distributed.
The electronegative atoms of flourine in SeF4 are not evenly distributed and kind pairs of electrons are on the central atom.
