The number of moles of NaCl = 0.103
Further explanationGiven
6 gram sample of NaCl
Required
moles
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
mole = mass : molar mass
Molar mass of NaCl = 58.5 g/mol
Input the value :
mole = 6 g : 58.5 g/mol
mole = 0.103
What two types of matter are closest in
density? How do you know?
ings.
Answer:
Density: The molecules of a liquid are packed relatively close together. Consequently, liquids are much denser than gases. The density of a liquid is typically about the same as the density of the solid state of the substance.
In a gas, the distance between molecules, whether monatomic or polyatomic, is very large compared with the size of the molecules; thus gases have a low density and are highly compressible. In contrast, the molecules in liquids are very close together, with essentially no empty space between them
I hope it helps you
Plz help me with these three please please !!!!!
Explanation:
Cations are positively charged ions with fewer electrons than protons. To partake in reaction, metals lose electrons to achieve a stable octet configuration. It has lost valence electrons and wold have a positive charge associated with it.
Potassium is a group 1 element. A metal.
Potassium has 1 valence electron so it loses the valence electron to form a stable octet.
A potassium ion has a positive charge and therefore cannot be an anion but is a cation.
The group number pretty much denotes the number of valence electrons.
Group 1 = 1
Group 2 = 2
Group 17 = 7
Group 18 = 8
Which of the following are held together by nonpolar covalent bonds? PLEASE HELP
Answer:
The atoms of chlorine are held together by non-polar covalent bonds. Covalent bonds are formed between two or more atoms having zero or very small electronegativity difference. For homonuclear molecules where the two bonding atom are of the same kind, the electronegativity difference is zero.
C. Atoms of chlorine (CI)
A covalent bond is created when the electrons from the two involved atoms are shared equally.The pair of electrons involved in this kind of bonding is referred to as the shared pair or bonding pair. Here the atoms of chlorine have non-polar covalent bonds. The correct option is C.
What are non-polar covalent bonds?A non-polar covalent connection is created when atoms with an equal amount of electrons share one another. The electronegativity of the two atoms is equivalent. When two atoms with similar electron affinities join together, like in the case of diatomic elements, it happens.
Non-polar covalent compounds are those in which there is no variation in electronegativity. In these compounds, the electronegativity does not change, preventing the motion of the bond pair's electrons in the direction of the linked atoms.
As a result, a molecule is non-polar and non-conducting since there is no bond or dipole moment between its atoms and no buildup of charges on the atoms.
Thus the correct option is C.
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What is the smallest unit found in a bar of gold. A. atom. B. Cell. C. Element. .D Nucleus PLEASE HELP
Answer:
c. element
Explanation:
Because gold is its own element, a gold bar is only made of one element.
The smallest unit found in a bar of gold is the nucleus of its atom. The core of an atom is called its nucleus which contains the nucleons protons and neutrons.
What is nucleus?An atom is composed of nucleons and electrons. The core of an atom is called its nucleus. Protons and neutrons are located inside the nucleus. They are called the nucleons.
The electrons are revolving around the nucleus through circular trajectories of fixed energies. Every elements are composed of their atoms. Atoms of different elements combine together to form compounds.
Gold is 79th element in periodic table. It is a transition metal in d-block. As every other elements the smallest unit are atoms where the atomic nuclei are even smaller units.
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(NH4)2SO4. How many N are there?
why is digital better then analog music
Once a digital recording is made, the bandwidth is set in place. An analog recording is considered unlimited. Therefore, it can move to a higher and higher resolution without losing its original quality.
The general oxidation of a metal ( M ) by a copper ion ( Cu2+ ) is M(s)+Cu2+(aq)⟶M2+(aq)+Cu(s) All the listed metals can be oxidized by Cu2+ ions but the reactions will occur at different rates. Arrange the metals based on how quickly each oxidation by Cu2+ ions should occur.
Answer:
Ba, Ca, Mn, Ni
Explanation:
Triphosphorous hexoxide formula
Answer:
P3O6
Explanation:
Tri=3 Hex=6
Which type of force is the magnet using to move the nail?
A nail moving towards a magnet
A) Friction
B) Gravity
C) Pull
D) Push
Answer:
a
Explanation:
Answer:
Explanation:
gravity
BRAINLIEST & 5 STARS & A FREE THANK YOU
Why was Wegener’s theory of continental drift almost completely discarded?
A. It didn’t explain how continents fit together.
B. It didn’t explain how mountains formed.
C. It wasn’t supported by fossil evidence.
D. It didn’t have a mechanism for how drift occurred.
Which of the following is evidence that the continents were once part of a supercontinent called Pangaea?
A. Island Arcs
B. Deep ocean trenches
C. Glacier scrapings
D. Mid-ocean ridges
Answer:
1: The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his hypothesis was rejected by many for lack of any motive mechanism. 2: The most obvious evidence for continental drift is that the continents appear to fit together like pieces of a puzzle. But scientists were skeptical , and Wegener needed additional evidence to support his hypothesis. Glaciers covered large areas that are now parts of these continents.
Answer:
1. D
2. C
Explanation:
1. Although now accepted, the theory of continental drift was rejected for many years, with evidence in its favor considered insufficient. One problem was that a plausible driving force was missing. A second problem was that Wegener's estimate of the speed of continental motion, 250 cm/year, was implausibly high.
2.The most obvious evidence for continental drift is that the continents appear to fit together like pieces of a puzzle. But scientists were skeptical , and Wegener needed additional evidence to support his hypothesis. Glaciers covered large areas that are now parts of these continents.
Does the size of the solute (sugar) affect the rate of dissolving?
Answer:
Yes
Explanation:
The rate at which a solute dissolves depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute.
Brainliest?
pleaseeeee I really need help :3
Answer:
C. 5 inches
Explanation:
don't worried, i learned that from my teacher
bro needs help
32.5 grams of NaOH reacts with an excess of CO2
2NaOH(s) + CO2(g) ⇒ Na2CO3(s) + H20
What is the theoretical yield of Na2CO3 in grams?
*** I NEED YOU TO SHOW YOUR WORK BROS, I ALREADY HAVE THE ANSWER (43.1g) ***
HELPPPPPPPPPPP HELPPPPP HELP
Answer:
calcium chloride and water
Explanation:
the reaction absorbed energy which means endothermic
What unit is used to measure weight?
Answer:
The unit is: Newton.
Hope it helps:D
What element has 7 valence electrons and 4 electron shells
Answer:
Mn
Explanation: 4th shell so 4th row and count 7 from the left most column
Questions and answer options are on ( Picture )
remember pick 2 answers it says
help :(
ZOOM IN if needed
Answer:
The answer is A
Explanation:
I dont see any claim
A2B8 + C2 - B2C + AC2
Answer:
You need to put more info! If you are trying to find the GCF its 1
What step of the water cycle has the most direct impact on freshwater storage
Answer:
Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff.
Explanation:
How do the formulas for molecular and ionic compounds differ? Explain the reason for
the difference.
Answer:
How do the formulas differ for molecular and ionic compounds? The formula for a molecular compound represents the atoms that make up one molecule of a compound. The formula for an ionic compound represents one formula unit of the compound. ... Put two electron between atoms to form a chemical bond.
Explanation:
What is the mass of 3.5 mol of MgBr2?
Answer:
The answer is 0.0054314469917931.
Explanation:
I assume you are converting between moles MgBr2 and gram. You can view more details on each measurement unit: molecular weight of MgBr2 or grams This compound is also known as Magnesium Bromide.
Toothpaste is an alkali. How could you use the toothpaste to show that red cabbage is an indicator?
Answer:
PUT THE TOOTHPAST ON CABBAGE AND CHECK IT OUT AFTER A DAY
If 23.17 g of beryllium (Be) reacts with water at standard temperature and pressure,
how many liters of hydrogen (H2) are produced?
Volume of H2 produced = 57.6576 L
Further explanationGiven
23.17 g Be
Required
Volume of H2
Solution
Reaction
Be(s)+H2O(g)→BeO(s)+H2(g)
mol Be :
= 23.17 g : 9 g/mol
= 2.574
From the equation, mol H2 : mol Be = 1 : 1, so mol H2 = 2.574
Volume H2(assumed at STP, 1 mol=22.4 L) :
= 2.574 x 22.4 L
= 57.6576 L
Precautions to take during electroplating
Answer:
Always be scared of electroplating. ...
Follow all electrical safety precautions. ...
Use all safety Precautions. ...
Use that Fume Hood. ...
It's a chemistry lab, set it up like one. ...
Always add acid to water. ...
Don't overheat your solutions! ...
Don't mix acid and cyanide solutions.
Consider the rate law below.
R=k[A]2
What effect does doubling the concentration have on the rate?
A. doubles the rate
B. triples the rate
C. quadruples the rate
D. no effect on the rate
C. quadruples the rate
Further explanationGiven
The rate law :
R=k[A]²
Required
The rate
Solution
There are several factors that influence reaction kinetics :
1. Concentration 2. Surface area 3. Temperature 4. Catalyst 5. Pressure 6. StirringThe rate is proportional to the concentration.
If the concentration increased, the reaction rate will increase
The reaction is second-order overall(The exponent is 2)
The concentration of A is doubled, the reaction rate will increase :
r = k[A]² ⇒ r= k[2A]²⇒r=4k[A]²
The reaction rate will quadruple.
which three human body systems coordinate to cause the arm to move
Answer:
Nervous system, Cardiac system, and the muscluar system
Explanation:
Why is it that the decomposition of nitroglycerin can result in so
much more volume than the decomposition of sodium azide?
Answer:
with the molecular formula C3H5(ONO2)3, has a high nitrogen content (18.5 percent) and contains sufficient oxygen atoms to oxidize the carbon and hydrogen atoms while nitrogen is being liberated, so that it is one of the most powerful explosives known.
Explanation:
NTG reduces preload via venous dilation, and achieves modest afterload reduction via arterial dilation. These effects result in decreased myocardial oxygen demand. In addition, NTG induces coronary vasodilation, thereby increasing oxygen delivery.
The decomposition of nitroglycerin can result in so much more volume than the decomposition of sodium azide nitroglycerin contains a lot of nitrogen (18.5%) and has enough oxygen atoms.
What is volume?A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch. Volume and length (cubed) have a symbiotic relationship.
The total volume much a container is usually thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold. The decomposition of nitroglycerin can result in so much more volume than the decomposition of sodium azide nitroglycerin contains a lot of nitrogen (18.5%) and has enough oxygen atoms for the nitrogen to be liberated while also oxidising the hydrogen and carbon atoms.
Therefore, the decomposition of nitroglycerin can result in so much more volume than the decomposition of sodium azide nitroglycerin contains a lot of nitrogen (18.5%) and has enough oxygen atoms.
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A fixed mass of oxygen gas occupies 300cm cube at 0 degree centigrade. what volume would the gas occupy at 15 degree centigrade
Answer:
hey
Explanation:
what is the answer PLEASE HELP!!
Answer:
the water displaced will not help the student find the correct volume because you can not accurately calculate it. you have to get the water when it is settled then you place the wood in.
Explanation:
which type of cell is shown in the diagram - a plant cell, a yeast cell or a bacterial cell
Answer:
bacterial cell plant cells dont have a tail
Explanation:
The type of cell shown in the diagram is the bacterial cell as plant cell do not have tails while bacteria have tail.
Bacteria are prokaryotic unicellular organisms. They have a relatively simple cell structure compared to eukaryotic cells. They also do not possess any membrane-bound organelles such as a nucleus. However, do they possess genetic material (DNA or RNA) in the intracellular space called the nucleoid.
Bacteria lack a membrane-bound nucleus and other internal structures and are therefore ranked among the unicellular life-forms called prokaryotes. Prokaryotes are the dominant living creatures on Earth, having been present for perhaps three-quarters of Earth history and having adapted to almost all available ecological habitats.
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