Answer: sodium-11 iron-26 sulfur-16
Explanation:
Answer:
sodium:11
iron:26
sulfur:16
Explanation:
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What is the percent composition by mass of suifur in Na2SO?
(Molar mass of Na2SO.= 142 g/mol)
Answer:
22.5%
Explanation
% composition = Molar mass of S
------------------------ x 100
Molar mass of Na2SO4
= 32.065
------------ x 100
142
=0.225 x 100
= 22.5%
In the cycle, after a new moon, _______________ means light appears on the _____________ side of the moon and continues to ________________.
Answer:
Explanation:
In the cycle, after a new moon, waxing means light appears on the right side of the moon and continues to increase.
Which region contains elements with five valence electrons ?
Answer:Group 5A or 15
Explanation:
Most halogens form compounds by
(1 Point)
gaining an electron to form a negative ion.
losing an electron to form a positive ion.
losing protons.
joining with both calcium and carbon.
Which detail supports the main idea Bats are useful to humans?
Bats often live in large colonies in caves and under bridges.
Bats are the only mammal that truly flies.
Bats eat hundreds of mosquitoes and other annoying insects at night.
Some bats carry rabies, a deadly virus.
Answer:
Bats eat hundreds of mosquitoes and other annoying insects at night.
Jenny read that most of Earth’s water is salt water, while only 3% is fresh water. She also read that not all of the fresh water is accessible. Most of Earth’s fresh water is tied up in which two areas?
A. glaciers and underground
B. ice and glaciers
C. underground and lakes
D. glaciers and lakes
Answer:
B. ice and glaciers
Explanation:
The majority of total freshwater on Earth, about 68.7 percent, is held in ice caps and glaciers.
The following flow diagram shows the various steps of elimination of waste through urine. There is an error in one of the steps. (5 points)
What is the error in the diagram?
Step 2 should be the ureters carry urine to the urethra.
Step 2 should be the kidneys carry urine to the bladder.
Step 3 should be urine leaves the body through kidneys.
Step 1 should be urine flows from the kidneys to the ureters.
Answer:
The answer is A: step one should be urine flows from the kidneys to the ureters.
Explanation:
I did the test and got it right :)
Answer:
A is your answer
Explanation:
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Explanation:
Boiling water:water heats up and bubbles physical change
Baking a cake: starts to cook into bread chemical change
Burning wood: turns into ash and burned wood chemical change
Painting a door: door changes color physical change
Answer:
water is yummy
Explanation:
What is the oxidation state of CI in CIO-
-1
+2
+1
0
Answer:
+1
Explanation:
A 32.14 gram sample of a hydrate of MnSO4 was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, 17.51 grams of the dehydrated compound remained. What is the formula of the hydrate?
Answer:
MnSO₄.7H₂O
Explanation:
To solve this question, we need to convert the mass of the dehydrated MnSO₄. The difference between mass of the hydrate and dehydrated compound is the mass of water. With the mass we can find the moles of water and the formula of the hydrate:
Moles MnSO₄ -Molar mass: 151g/mol-:
17.51g * (1mol / 151g) = 0.116 moles
Moles H₂O -Molar mass: 18g/mol-:
32.14g-17.51g = 14.63g * (1mol / 18g) = 0.813 moles
The ratio of moles MnSO₄: Moles H₂O represent the amount of water molecules in the hydrate:
0.813mol / 0.116mol = 7 molecules of water.
The hydrate formula is:
MnSO₄.7H₂OWhen are atoms considered to be stable?
Answer:
Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons.
The genotype RR would be considered a purebred and the genotype Rr would be considered a hybrid. *
True or False
Answer:
true
Explanation:
PLS HELPPPPP ASAP
How many grams of Oxygen are in 7.2 grams of C12H22011? Round your answer to the hundredth place (0.01)
A cell wall is the ________.
A
thin, soft membrane that surrounds the nucleus of each cell
B
collection of cytoplasm in each cell
C
rigid structure that surrounds the cell membrane of plant cells and most bacteria
D
sheets of cells that cover the lining of the stomach
Determine the products of the following reaction:
Ca(OH)2 (aq) + 2 CuCl(aq) →
(aq) +
H(s)
:: Caci
:: CaCl2
+ CuOH
:: Cu(OH)2
*: CIOH
:: Cacu
6.
This part of Earth's atmosphere blocks the sun's harmful rays.
Ozone layer
Stratosphere
Mesosphere
Troposphere
Answer: THE ANSWER IS OZONE WEEEE a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun.
Explanation:
Answer: The answer is The Ozone layer
describe the behavior of the molecules in a liquid. Explain this behavior in terms of intermolecular forces.
The term “INTERmolecular forces” is used to describe the forces of attraction between atoms, molecules, and ions when they are placed close to each other.
In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.
In a liquid, intermolecular attractive forces hold the molecules in contact, although they still have sufficient KE to move past each other. Intermolecular attractive forces, collectively referred to as van der Waals forces, are responsible for the behaviour of liquids and solids and are electrostatic in nature.
Learn more about intermolecular forces here:
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Which statement correctly describes acetyl-CoA?
It connects glycolysis to the citric acid cycle.
It connects the citric acid cycle to the electron transport chain.
It is the product of catabolism of proteins.
It is the product of catabolism of fats.
A. It connects glycolysis to the citric acid cycle.
Explanation: Right on edge
Kaitlyn said that the metal sodium Na and the non metal neon Ne form the ionic compound NaNe. Using what you know about groups and valence electrons, explain why you support or do not support kaitlyns statement
There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. Therefore, Kaitlyn statement is incorrect.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Ionic bond is formed by cation and anion. Na is a metals and act as cation as Na⁺. Neon is a non metal but it can not gain or loose electrons as its outermost shell is fully filled. Neon is a noble gas which is unreactive. So, Kaitlyn statement is not correct. . Ionic bonds are stronger than covalent bonds. The melting and boiling points are higher in ionic compounds.
Therefore, Kaitlyn statement is incorrect.
To learn more about chemical compound, here:
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help me with this asap rocky pleasee
Answer:
b
Explanation:
In the ocean, there are small fish that live in and around the mouths of large sharks. The shark does not harm the fish because the fish pick food from between the shark’s teeth. In return, the small fish benefit from food the sharks find. Which form of symbiosis exists between the sharks and the small fish?
commensalism
mutualism
parasitism
predation
please help
Answer:
Mutualism
Explanation:
i don’t think i know
What is the formula for tricarbon heptafluoride?
C2F3
CF7
C3F7
C773
Answer:
C3F7
'Tri' means 3
Tricarbon means 3 carbon
"Hepta" means 7
Fluoridez molecular formula is "F"
hence F7
Select the correct answer.
This chemical equation is not balanced:
AgBr(s) → Ag(s) + Br2(g).
Why isn’t it possible for the reaction to occur as indicated by the unbalanced equation?
A.
There are more substances on the right side of the equation than on the left side.
B.
There is a gas on the right side of the equation but not on the left side.
C.
The bromine atoms must go through a liquid state before becoming a gas.
D.
There is more mass represented on the right side of the equation than on the left side.
E.
The bromine atoms on the right side of the equation are not bonded to another element.
The photo shows a person holding a frozen smoothie. Which statement best explains why the smoothie is melting?
Answer:
c
Explanation:
the temperature of the person's hand is hight than the temperature of the smoothie
Answer:
c
Explanation:
the temperature of the person's hand is hight than the temperature of the smoothie
Help ASAP I will mark brainliest for the correct answer !!!⚡️⚡️⚡️
Answer:
A) 0.5h
Explanation:
Using the formula,
speed=[tex]\frac{distance}{time}[/tex]
Substituting given values
1224=612/time
time=0.5h
IF RIGHT I WILL GIVE BRAINLIEST
Which of the following types of soil would have the highest porosity?
A. 50% sand, 50 % clay
B. 80% sand, 20% silt
C. 40% clay, 60% silt
D. 80% clay, 20% sand
Answer:
80% clay 20% sand
Hope this helped <3
Answer:
B
Explanation:
Sand is much more bigger than clay meaning there are gaps between each grain of sand making it easier for water to flow into it.
What is the symbol of element Californium?
Answer:
Californium is a chemical element which is radioactive, its symbol is 'Cf' and atomic number is 98
Answer: the elementale symble is Cf
Explanation: the symble of element is Cf
Gold(III) forms an ionic compound with fluoride. How many atoms of each ion will bond to form an ionic compound?
Question 23 options:
1 gold(III), 1 fluoride
1 gold(III), 3 fluoride
2 gold(III), 3 fluoride
3 gold(III), 1 fluoride
Answer:
1 gold(III), 3 fluoride
Explanation:
How many atoms of tin are found in 3.50 moles of tin?
Answer:
2.11x10²⁴ atoms
Analysis determined a compound contained 92.25% carbon and 7.75% Hydrogen. Determine the
empirical formula for this compound
Answer:
Styrene has the empirical formula CH, and there is 92.25% carbon and 7.75% hydrogen. The percentage of these parts can be used to determine the molar mass and use the molecular formula.
Explanation: