Answer:
evaporate
Explanation:
after water or any other solvent has mixed with satt stirr the mixture then heat it the water will evaporate leaving the solute (salt) behind
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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1) According to the table, what was the temperature change from start to finish of each material? Styrofoam- metal- paper- plastic-
Answer:
styrofoam would be 14°
metal would be 55°
paper would be 25°
plastic would be 28°
Explanation:
im pretty sure you just take the biggest number and subtract the smallest number. to get how much it has changed.
Which is the best hypothesis to use for this investigation
Answer:
Wdym?? there is no other hypotheses stated
which statement about the carbon cycle are correct
1. carbon dioxide is added to the atmosphere by respiration
2. carbon dioxide is added to the atmosphere by combustion of coal
3. carbon dioxide is removed from the atmosphere by photosynthesis
pick 2!
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2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2O
In the above equation how many moles of N2 can be made when 32 moles of CuO are consumed?
Answer:
11 moles
Explanation:
From the coefficients of the equation, we know that for every 3 moles of CuO consumed, 1 mole of nitrogen is produced.
So, the answer is 32/3 = 11 moles to 2 sf.
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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Describe how
ions impact functions
in the heart
Explanation:
In a normal heart, there is a balance between calcium and potassium ion levels in both the outer and inner walls of the heart. That balance keeps electrical energy flowing correctly through the heart, and allows the heart muscle to expand and contract as the heart beats.10-Nov-2005
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15. How many neutrons are in the nucleus of an atom hat has an atomic mass of 36 and an atomic number of 18?
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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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
Why does the reactivity of metals increase from right to left on the periodic table? (1 point)
Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced,
Metals on the right have more protons, causing valence electrons to be held more strongly
Metals on the right have fewer protons, making it harder to attract electrons from other atoms,
Metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away
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Taking into account the definition of reactivity, the correct option is the first option: Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
Reactivity is a measure of the probability that a chemical species will participate in a chemical reaction to form chemical bonds.
In other words, the reactivity of a chemical element is the tendency that this element has to combine with others.
For elements that behave like metals, this trend is directly related to the ease with which they lose their valence electrons.
Valence electrons are those electrons farthest from the nucleus of the atom. These electrons are easier to remove because they are the least attracted to the nucleus. Thus, less and less energy is needed to start these valence electrons, so they can commonly participate in the formation of chemical bonds.
In other words, as the size of the metal atoms in a group increases, so does their reactivity.
Then, the correct option is the first option: Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
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https://brainly.com/question/25163860?referrer=searchResultsWhile considering boiling point elevation and freezing point depression a solution concentration is expressed in molality and not in molarity?why?
Answer:
Colligative properties are physical properties of solutions, like boiling point elevation and freezing point depression. In these calculations, the temperature of the solution is changing as we add more solute to the solvent, so this means that the volume of the solution is changing. Since molarity is moles solute per liter of solution, we cannot use molarity as our concentration unit. This is why we use molality (moles solute per kg of solvent) since the kg of solvent doesn't change with temperature.
Explanation:
First in boiling point elevation and freezing point depression, we deal with the system whose temperature is not constant. Second we cannot express the concentration of the solution in mortality because it changes with temperature whereas mortality is temperature independent. Therefore, while considering boiling point elevation and freezing point depression a solution concentration is expressed in mortality and not in mortality.
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
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
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.
Facts about GeoScience/Geology Science
help me please?
I need to pass this tomorrow
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
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:
Hope this helps!
Have a nice day! :D
Animals can get nitrogen by eating _____ and then making their own protein.
plants
gases
minerals
waste
Answer:
plants
Explanation:
Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.
Hope this helps :)
giải phương trình PO3+H2O ?
Answer:
Câu trả lời của bạn sẽ là H3PO3Explanation:
Chà, Hy vọng nó sẽ giúp bạn ..
Nếu tôi sai, chỉ cần sửa cho tôi, được không? ..
Nhưng, chào mừng bạn trước ..
(;ŏ﹏ŏ)(ㆁωㆁ)
When an atom forms negaitive ion?
Answer:
The outer shells of non metal atoms gain electrons when they form ions this result in the formation of negative ions
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
Based on the Lewis/electron dot representation
of the two atoms, predict the ratio of metal
cationic (+) atom to nonmetal anionic (-) atom in
the compound.
Be.
•As.
A. 1:3
B. 2:1
C. 3:2
D. 1:1
Answer the ratio of Be to At is 1:2 in the compound
Explanation:
Be in Periodic Table 2A has 2 valence electrons in its outer orbital and needs to give them away. When it gets rid of 2 negatives, its charge is +2.
At in Periodic Table 7A has 7 valence electrons in it outer orbitals and needs one more electron. 2 AT atoms each accept one electron from Be and each has a charge of -1. The Be ion of +2 charge is balanced by the two At ions of -1 charge, so the ratio of Be to At is 1:2
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
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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6. What can you do to reduce the environmental and political
impact of obtaining rare earth elements from the ground? |
Answer:
u can search it
Explanation:
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Pure substances are (1)____________ in appearance. During boiling, the temperature of a (2)__________changes at the start then it becomes (3)_________. During melting, a substance melts (4)___________ within a short time. To determine a (5)_________ sample if it is a pure substance , you should test it using its boiling point; while if it is a (6)________ sample, its melting point is the best way to test. In Enrichment A, the liquid A is (7)_________ since it has a fixed boiling point while the water with salt is a mixture because it has a varying melting point.
CHOICES
constant
Boiling point
melting
liquid
completely
different
pure substance
mixture
solid
distilled water
Melting point
heterogeneous
homogeneous
PLS HELP ME, I'LL GIVE YOU THE BRAINIEST!!!
Answer:
homogenousliquidconstantcompletelyliquidsolidpure substanceLet me know what you think about these answers.
LA MATERIA SE PUEDE PRESENTAR COMO
Answer:
La materia está constituida por átomos, que a su vez forman moléculas. Las moléculas constituyen la mínima parte en la que se puede fragmentar una sustancia para que conserve sus propiedades. Todo lo anterior permite que la materia se pueda presentar en estado sólido, líquido y gaseoso.
Explanation:
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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