The monoatomic gas : He
Further explanationIn general, the gas equation can be written
[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]
where
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.08206 L.atm / mol K
T = temperature, Kelvin
P 380.9 mmHg = 0.5 atm
T 20 C+273 = 293 K
We can find molar mass of gas :
[tex]\tt M(molar~mass(M)=\dfrac{mRT}{PV}\\\\M=\dfrac{8~g\times 0.082\times 293~K}{0.5~atm\times 96~L}\\\\M=4~g/mol[/tex]
monatomic gas means a single element, usually a noble gas. The noble gas element with mass 4 is He
What kind of bonding holds together
the atoms in a sample of pure zinc
Answer:
Metallic Bonding
Explanation:
Zinc is a metal, as such it's atoms are held together by the metallic bond. Metallic bond is a type of chemical bond formed between positively charged ions in which there is a collective sharing of a sea of valence electrons.
In the electronegativity periodic table down a place from left to right is it going to be the same as negative to positive
And also for the right side from down to up is it going to be negative at down and postive at the top?
Answer:
yes, you are correct
Explanation:
it increases upwards
pls this is my second time asking these questions, i'm sorry, but i really need help!!! 1. what happens to atoms when there is a chemical reaction? 2. what are the rules that have to be followed for atoms? 3. what do these rules mean for chemical reactions? sorry, chemistry isn’t really my best subject lol
Answer:
the atoms of the original substances gain, lose and even share their very own electrons. write the symbols of the elements that form the compound. Write down the valency, and lastly go over valencies. This is all I got so far. I hope this helps
Explanation:
2. What is the mass of 5.3 moles of CaCl2?
Answer:
590 g CaCl₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
5.3 mol CaCl₂
Step 2: Identify Conversions
Molar Mass of Ca - 40.08 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of CaCl₂ - 40.08 + 2(35.45) = 110.98 g/mol
Step 3: Convert
[tex]5.3 \ mol \ CaCl_2(\frac{110.98 \ g \ CaCl_2}{1 \ mol \ CaCl_2} )[/tex] = 588.194 g CaCl₂
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
588.194 g CaCl₂ ≈ 590 g CaCl₂
Is the substance in the chart a metal or non metal? Explain.
Answer:
Nonmetal
Explanation:
A substance in the chart is a nonmetal because nonmetals are not water soluble, they are poor conductors of heat and electricity and they do not have high melting points like metals.
What are the similarities and differences between ionic compounds and metals? Why are they important? Describe some common ionic compounds and metals and their uses in everyday life.
Answer:
Similarities:
1. Electrostatic attraction between particles of unlike charges. occurs in both ionic compounds and metals
2. Both involve metallic cations. Metallic cations are present in both ionic compounds and in metals.
3. Both ionic compounds and metals have a crystal lattice structure in their solid state.
4. Both ionic compounds and metals have high melting and boiling points
5. Both can conduct electricity although ionic compound do so only in molten or solution form.
Differences:
1. The crystal lattice of an ionic compound consists of two oppositely charged ions of two or more elements whereas metals lattices consists of metal cations and delocalised electrons of the same metal.
2. Ionic compounds are compounds whereas metals are elements.
3. Ionic compounds are brittle whereas metals are malleable and ductile.
4. Electrons are transferred from one atom to another in ionic compounds whereas in metals, are delocalised around metallic cations
5. Metals are sonorous and are shiny whereas ionic compounds are not.
Importance of ionic compounds and metals
Ionic compounds are important as salts in industries, as food additives, in detergent and soap-making, as electrolytes and in biochemical systems.
Metals are important in building and construction industry, in jewellery, as conductors in wires and electrode plates, in making parts for vehicles used in transportation
Common ionic compounds and their uses:
Sodium chloride, Potassium iodide and Sodium fluoride are used as a food additive and preservative, as electrolytes, as well as in toothpastes for healthy teeth.
Common metals and their uses
Iron, Aluminum and Gold are used in steel production, making many cooking utensils and for making jewelleries
Explanation:
Similarities:
1. Electrostatic attraction between particles of unlike charges. occurs in both ionic compounds and metals
2. Both involve metallic cations. Metallic cations are present in both ionic compounds and in metals.
3. Both ionic compounds and metals have a crystal lattice structure in their solid state.
4. Both ionic compounds and metals have high melting and boiling points
5. Both can conduct electricity although ionic compound do so only in molten or solution form.
Differences:
1. The crystal lattice of an ionic compound consists of two oppositely charged ions of two or more elements whereas metals lattices consists of metal cations and delocalised electrons of the same metal.
2. Ionic compounds are compounds whereas metals are elements.
3. Ionic compounds are brittle whereas metals are malleable and ductile.
4. Electrons are transferred from one atom to another in ionic compounds whereas in metals, are delocalised around metallic cations
5. Metals are sonorous and are shiny whereas ionic compounds are not.
Importance of ionic compounds and metals
Ionic compounds are important as salts in industries, as food additives, in detergent and soap-making, as electrolytes and in biochemical systems.
Metals are important in building and construction industry, in jewellery, as conductors in wires and electrode plates, in making parts for vehicles used in transportation
Common ionic compounds and their uses:
Sodium chloride: sodium chloride is an ionic compound composed of sodium and chloride ions. It is commonly used as a food additive and preservative, as an electrolyte, as well as the extraction of sodium metal.
Potassium iodide: it is composed of potassium and iodine ions. It is added to “iodized” salt to prevent goitre.
Sodium fluoride: it consists of sodium and fluoride ions. It is an important ingredient in toothpaste for healthy teeth.
Common metals and their uses
Iron; iron is used in steel production which is used for constructing bridges, houses, and various machinery parts
Aluminum: it is used in making many cooking utensils like pots and pans
Gold: it is used in making jewelleries and ornaments.
Iconic bonds only form with metals and non metals. They have to give up electrons and non metals want to gain electrons.
They are important as the variance electrons are transfer from the meal to the neighboring nonmetal. But the electron bonding they are free to float around within the entire solid metal. Sodium carbonate, potassium chloride an magnesium sulphate etc. are some of the common iconic compounds.Learn more about the and differences between ionic compounds.
brainly.com/question/15168024.
Mercury has a density of 13.534 g/mL. The Department has a 385 mL container of mercury. What is the mass of the mercury in the container in grams?
Answer:
5210.59 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 13.534 × 385
We have the final answer as
5210.59 gHope this helps you
HELP NEEDED, ASAP
A sample of a gas occupies 1600 milliliters at 20.0°C and 600 torr. What volume will it occupy at the same temperature and 800 torr? (Use Boyle’s equation)
Select one:
a. 2.02 ×10^3 ml
b. 1.00 ×10^3 mL
c. 1.45 ×10^3 mL
d. 1.20 ×10^3 mL
Answer:
d. 1.20 ×10^3 mL
Explanation:
That is the answer have a wonderful day!!
Answer:
im ocean nice to meet u mariam
Explanation:
Which compound listed below has the largest molar mass?
Ca(OH)2
H20
CaCl2
NH3
Answer: the answer would be CaCI2
Explanation: this was one of my exam questions i got right. :)
pls i need #2 !!!!!!!!!!
Answer:
answer c aka it is cheaper than other elements
Answer:
because it's cheap and not hard to purify
What general trend do you observe in the periodic table of the Atomic Radius?
Answer:
Atomic radius Increases in groups from top to bottom and decrease in period from left to right.
Explanation:
CAN SOMEONE PLZ HELP!!!
Are the chemical equations balanced or not?
Answer:
Remember, chemical reactions follow the law of conservation of mass. Chemical equations show this conservation, or equality, in terms of atoms. However, simply writing down the chemical formulas of reactants and products does not always result in equal numbers of atoms
Explanation:
Answer:
Yes
Explanation:
i think so as there are 2 h on the left
What occurs to the kinetic energy when the mass moving object is doubled?
Answer:
Kinetic energy increases.
Explanation:
Kinetic energy is energy you get from moving. The equation for KE depends on mass as well as velocity. If you increase one of these factors, KE will increase too.
what is solvent and solute
Answer:
Solute=the substance which a solvent dissolve to produce homogeneous mixture
Solvent= the substance in which a solute dissolve to produce homogeneous mixture
Explanation:
solvent: The liquid in which a solute is dissolved to form a solution.
solute: The component in a solution, dissolved in the solvent.
Which prefix is the smallest?
Answer:could it be kilo
Explanation:it looks like it has the least letters
please help me with this basic organic conversion.
use the shortest way to do it
Answer:
See explanation
Explanation:
This conversion must go through a sequence of steps as i have shown in the image attached to this answer.
The acetone is converted to propan-2-ol using LiAlH4, THF and acid. The propan-2-ol may be converted to propene by E2 elimination. Addition of HBr yields 2-bromo propane.
The Wurtz reaction converts 2-bromo propane to 2,3- dimethyl butane. This can be brominated in the presence of light to yield 3-bromo-2,3-dimethyl butane. Elimination of HBr using a base leads to the formation of the required product as shown.
how many molecules are in 2.5 mol of NaCl?
(a) 1.51×10^24
(b) 146
(c) 1.51×10^23
(d) 4.15
Answer:
1.51 x 10²⁴molecules
Explanation:
Given parameters:
Number of moles of NaCl = 2.5moles
Unknown:
Number of molecules = ?
Solution:
The number of molecules that can be found in a given mole is given as the Avogadro's constant;
1 mole of substance = 6.02 x 10²³ molecules
2.5 mole of NaCl = 2.5 x 6.02 x 10²³ molecules
= 1.51 x 10²⁴molecules
Given the reaction: 4Al + 302 --> 2AI2O3
How many moles of Aluminum oxide do you have if you have 6 moles of AI?
A
6: moles
B: 2 moles
C: 3 moles
D: 12 moles
Answer:
B: 2 moles
Explanation:
that my answer I got i think its correct
20 POINTS. What happened to a Gas once thermal energy is removed. What happened to a Gas once Thermal energy is added? Be specific!
When thermal energy is added the gas will become more dense as the atoms come closer together and when thermal energy is added it becomes less dense as the atoms move apart
What is true of a gas
Answer:
did you have options, cause if you did chose something alond the lines of
Explanation:
A real gas is a gas that does not behave as an ideal gas due to interactions between gas molecules. A real gas is also known as a nonideal gas because the behavior of a real gas in only approximated by the ideal gas law.
What happens when an object
returns to its original shape-does it
still have elastic energy?
Answer:
Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching, or twisting the object.
What is the difference between heat of formation and heat of reaction? Give examples and units
Answer:
The main difference between the heat of formation and heat of reaction is that heat of formation is the amount of energy either absorbed or released during the formation of a compound whereas heat of reaction is the amount of energy either absorbed or released during any chemical reaction.
What is the difference between atomic elements and molecular elements?
in 2 hours a bicyclist traveled 75 kilometers. What was the bicyclist's average speed?
Answer:
37.5 miles per hour....
An organism can occupy more than one niche in an ecosystem
A) True
B) False
Answer T
Explanation:
Which object has unbalanced forces acting on it?
A leaf falling to the ground
A sweater on a store shelf
A fence around a garden
A letter in a mailbox
Answer:
A leaf falling to the ground.
Explanation:
The leaf is the only object in motion and is falling therefore the force of gravity is the unbalanced force.
Need help with these.
explain why diamond has a high melting point
Answer:
Each carbon atom is covalently bonded to 4 other carbon atoms in diamond. A large amount of energy is required to split these atoms apart. This is because of the fact that covalent bonds are strong.
In diamond 4 carbon atoms are strongly bonded with covalent bond and they form giant covalent structure which requires large amount of energy to break down, that’s why diamond has a high melting point. It does not conduct electricity.
Worth 40 Points❤ 10th grade chemistry
Answer:
FEGACBDExplanation:
Those are the answers in order, BUT the Goldstein and Rutherford ones are confusing me because Rutherford discovered protons and the nuclear atom. Through my research I also noticed that Goldstein contributed to the discovery of the protons made Rutherford, so I listed him as the one who discovered the proton.
I hope this helps! Have a wonderful night! :D
What is the ground-state electron configuration of chlorine and the number of valence electrons in it?
Explanation:
Chlorine is an element in group 7 on the periodic table.
It is the second element in this group of halogens
The element has a total of 17 electrons:
Ground state configuration = 1s² 2s² 2p⁶ 3s² 3p⁵
Valence electrons are the outermost shell electrons;
From the configuration: 3s² 3p⁵ is the valence shell
Number of electrons = 2 + 5 = 7