Answer:
Explanation:
The only way to know for sure if a chemical reaction has occurred is to identity that a new compound has been formed. There are signs
we can look for that help to determine if a chemical reaction has occurred. One sign of a chemical reaction is the formation of a gas
observed as bubbling, flezing, or foaming.
Some chemical reactions, like the burning of wood, result in the production of heat or light energy.
A change in temperature either an increase or decrease, can indicate that a chemical reaction has occurred.
The formation of a precipitate is another sign of a chemical reaction. A
precipitate is a solid substance that separates from a solution.
A change in color such as we see in the rusting of a bike chain, is the final sign that a chemical reaction has occurred. If one or more of these signs is
presnt, a chemical reaction has occurred
Cho 40 gam tác dụng (Al, Cu) vừa đủ với 600 gam dd HCl 14,6%. Tính% khối lượng Al, Cu
попробуйте запросить поисковую систему и скопируйте и вставьте вопрос
Facts about GeoScience/Geology Science
Which of the following atoms will have the
most similar properties to the atom shown
below
Answer:
Atom 1. The ratio of Atom 1 to the diagram one is 1/2. It is the most closely related. Feel free to mark brainliest!
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A student uses the periodic table to map out the trend in increasing atomic radii. During peer feedback, a student mentions that her trend is incorrect. Which model and explanation should the student use to help the student understand?
Atomic radius decreases across the period and increases down the group.
The atomic radii is a periodic trend that decreases across the period and increases down the group. Periodic trends are properties of elements that increase or decrease down the group or across the period.
As more positive charges (protons) are added to the nucleus as we move across the period, the attractive force between electrons and protons increases. As such atomic radii decreases across the period.
Down the group, addition of more shells leads to increased electronic repulsion which causes that atomic radii of elements to increases as we move down the group.
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1- How long does it take after you consume isotopes until they end up in your hair?
2- How is the isotope content of hair used to solve crimes?
Answer:
could you explain the question further
What orbital does the quantum numbers n=4 l=2 ml=2 describe
Answer:
Orbital designation
for Principle Quantum number n=4, this is the shell number & corresponds to N shell, (shells are designated K,L,M,N)
for Angular Momentum number l=2, this is the orbital level corresponding to d, given that l can be any integer 0-(n-1), for( 0,1,2,3 )corresponds to (s, p, d, f)
The orbital designation is 4d
for Magnetic Quantum number ml, the suborbitals correspond to -l through l, (-2,-1,0, 1,2)
for ml=-1 the suborbital -1 in the 4d sub shell with electron spin state ms=-1/2
molecular structure of sodium oxide
Answer:
madami DA pat hung texture
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TEDDYLOVER.
Ned help with this question
identify each pair of compounds as constitutional isomers, stereoisomers, identical molecules, or other.
please explain bonding of CCl 4
Answer:
CCl4 is a covalent bonded nonpolar molecule.
Explanation:
Although there is an electronegativity (small) difference between C and Cl, its structure with 4 chlorine atoms allows the polarity to be "canceled out." I have attached a picture of the molecule below where you can clearly see the dipole movement on either side gets canceled hence making it have no net dipole movement. Additionally, CCl4 has a total number of valence electrons to be 32. 7 for one chlorine atom and 4 for a carbon one. The octets are satisfied as well. It's covalent because carbon and chlorine are nonmetals.
How is half life used in today’s society?
Answer:
to judge outcomes
Explanation:
True or false: The nucleus occupies most of the space of an atom.
Answer:
True, typically, the nucleus contains more than 99.9% of the mass of an atom.
Explanation:
1.Give the correct order of apparatus (Evaporating dish, Filter funnel, Test tube, Dropper, Spatula) to show the correct arrangement that can be used to prepare and investigate the nature of pH of a sample of onion solution.
2.Name an apparatus and a chemical used in this experiment.
Answer:
2 answer
A List of Chemistry Laboratory Apparatus
Safety goggles and safety equipment.
Beakers.
Erlenmeyer flasks, AKA conical flasks.
Florence flasks, AKA boiling flasks.
Test tubes, tongs, and racks.
Watch glasses.
How long does it take a radio signal from the Voyager spacecraft to reach Earth if the distance between Voyager and Earth is 2.72 x 10⁹ km?
The time taken for the radio signal to reach the earth is 9.1 x 10^3 seconds.
Let us recall that radio waves are part of the electromagnetic spectrum. This means that they travel with the speed of light.
The speed of the wave of obtained from the relation;
Speed = Distance/Time
Therefore;
Time = Distance/Speed
Distance = 2.72 x 10⁹ km or 2.72 x 10^12 m
Speed = 3 x 10^8 m/s
Time taken = 2.72 x 10^12 m/3 x 10^8 m/s
= 9.1 x 10^3 seconds.
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Which is the best hypothesis to use for this investigation
Answer:
Wdym?? there is no other hypotheses stated
Among the following compounds which are isomers?
I. CH3CH2–0-CH3 II. CH3CH2CH2-OH
II. CH3CH2–0-CH2CH3 IV. CH2=CH-O-CH3
A. I and II
B. I and III
C. II and III
D. I and IV
I and II are the functional isomers of each other. Hence option A is correct.
What is isomer?Isomer is defined as when multiple compounds with the same chemical formula but different chemical structures exist. A prefix that denotes the number of carbons is followed by the suffix -ane, which designates that the molecule is an alkane. By counting the chiral centers in a chemical, one can determine how many optical isomers exist. The formula 2n1, where n is the number of chiral centers, indicates the greatest number of optical isomers.
They are functional isomers because alcohol CH3CH2CH2OH and ether CH3CH2OCH3 contain different functional groups. Functional isomerism, which refers to isomers that differ in the functional group present in the carbon chain, is exemplified by H3-CH2OH and CH3-O-CH3.
Thus, I and II are the functional isomers of each other. Hence option A is correct.
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is there a heap t storing seven distinct elements such that a preorder traversal of t yields the elements of t in sorted order? how about an inorder traversal? how about a postorder traversal?
Yes, there is a heap t storing seven distinct elements such that a preorder traversal of t yields the elements of t in sorted order. However, in inorder traversal and postorder traversal, there is no heap t storing seven distinct elements.
In a binary tree system, preorder traversal is used to make a duplicate of the tree. It is also utilized to obtain the prefix expression.
If there is a (min-heap) TT storing seven distinct elements such that a preorder traversal of TT yields the elements of TT in sorted order;
Then, the image attached below shows the description of the preorder traversal in sorted order.
In an inorder traversal, the parent is always listed after its left child. However, in a (min-heap), the parent is usually smaller than the left child. As such, the smaller parent is normally listed after its left child. Hence, inorder traversal of a (min-heap) is not usually sorted in order.
The same scenario for inorder traversal is true for postorder traversal, thus postorder traversal of a (min-heap) is not usually sorted in order.
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Ozone gas found in the stratospher protects Earth from ____ -energy ultraviolet radiation,
ozone gas found in the stratosphere protects Earth from high energy ultraviolet radiation.
what is the role of plastocyanin in the z-scheme model?
Answer:
It shuttles electrons between the cytochrome complex and photosystem I.
Explanation:
draw molecular structure of Sodium oxide
Answer:
I think it is right.
please make me brainliest
Answer:
I hope it will help you so . Have a great day.
El porcentaje en masa de una solución de azúcar en agua es de 3.8%, si se tienen 6.3 Kg de solución ¿Cuántos gramos de azúcar hay?
La cantidad de azúcar en la solución es 239.4 gramos. En este caso, el azúcar es el soluto, y el agua el solvente.
El azúcar es el soluto el cual se encuentra disuelto en una solución acuosa que posee una masa de 6.3 kilogramos.
Un kilogramo equivale a 1,000 gramos. Es decir, 1 Kilogramo (kg) = 1,000 gramos (gr).
Entonces, la cantidad de azúcar puede ser calculada utilizando la regla de tres simple >>
6,300 gr ________ 100 %
X ______________ 3.8 %
X = (3.8 x 6,300)/ 100 = 239.4 gr
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If the density of copper is 8.96 g/cm3, and the mass of a sample is 5.00 g, what is the volume of the copper?
Answer:
The density is the same, so
(6000 g)/V = 8.96 g/cm3
V = 6000/8.96 cm3 = 669.64 cm3
Explanation:
513.16 in scientific notation?
Answer:
5.1316 x10^2
Explanation:
just simply move the decimal point to the first number, and then count how many numbers are after the decimal point
Answer:
5.1316x10^2
Explanation:
move the decimal left until the number is 1-10(not including ten) and count how many places you moved for the exponent, in this case it’s 2
A coefficient serves which purpose in a chemical equation?
The coefficient indicates the number of molecules in what seems like a mathematical theorem or formula. A more comprehensive explanation follows.
Coefficients seem to be quantities, integers as well as words that are added in front of the same biochemical representation or expression just to counterbalance chemical formulas.The function of coefficients together in balanced chemical would be to represent the proportion wherein the starting materials mix during a reaction.
Thus above response is right.
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What is the volume of 1.0 mole of gas at a pressure of 3.12 ATM and a temperature of 270K
Answer: 7.13 L
Explanation:
What is the volume of 1.0 mole of gas at a pressure of 3.12 ATM and a temperature of 270K
AT STP OF 1 ATM OF PRESSURE AND 273K ONE MOLE OF GAS OCCUPIES 22.4 L
WE HAVE MORE THAN TRIPPLED THE PRESSURE AND SLIGHTLY LOWERED THE TEMP
THE NEW VOLUME WILL BE 22.4 x (1/3.12) x 270/273 =7.13 L
True or False:
11. The water cycle has no start or end.
12. When water turns into a gas this is called evaporation.
13. The amount of water on the Earth grows by 0% each year.
14. Evaporation can only occur in salt water.
15. More evaporation occurs during the day.
A. True
A. True
A. True
A. True
A. True
B. False
B. False
B. False
B. False
B. False
Answer:
11) True
12) True
13) False
14)False
15) True
Explanation:
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Explain the purpose of the magnet in a mass
spectrometer.
Answer:
The magnetic sector mass spectrometers use a bending magnet: When the ions or atoms enter the magnet, they are forced to bend, and the light ions bend sharper than the heavy ions, as a result of which they're separated into a spectrum, like a rainbow.
Explanation:
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How is the brain related to the nervous system?
All nerve cells are connected to the brain.
The brain is in charge of reproducing more nerve cells.
The nervous system controls the brain.
The brain is in charge of all nerve cells in the body.
Answer:
it is a ty hope this helps
Explanation:
Given that the density of Al is 2.702 g/mL, determine the volume of a 6.80 g aluminum cube.
Answer:
2.52 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question we have
[tex]volume = \frac{6.8}{2.702} \\ = 2.516654[/tex]
We have the final answer as
2.52 mLHope this helps you
A car accelerates from rest to a speed of 24 m/s in 8 seconds. What is the car's average acceleration
Answer:
3 m/s
Explanation:
24 m/s over 8 seconds would be 24/8 making it be 3 m/s avg