Answer:
Seaborgium is an artificially produced radioactive chemical element, it's appearance is unknown, it probably has a silvery white or metallic gray colour. The most stable isotope Sg 271 has an half life of 2.4 minutes.
write a general equation for the reaction of an alkali metal with water.
Answer:
Alkali metals are highly reactive metals. These metals are that much reactive that they can even explode in the air as well. When alkali metals and water react with each other, there is a formation of metal hydroxide and the evolution of hydrogen gas.
The general representation of metal is A. so, the general equation for the reaction of an alkali metal with water is given below.
2A(solid)+2H2O(liquid) -------> 2AOH(aqeous)+H2(gas)
A student fills two syringes: one with air and the other with an equal volume of
water. After capping the syringes, the student applies the same amount of
pressure to the plungers and records observations about the change in volume.
Based on the particle model of matter, which of the following statements best
explains the student's observations that the volume of the gas decreases greatly
but the volume of the liquid does not change noticeably?*
Gases expand to fill their containers but liquids do not because particles of gases are
free to move but particles of liquids are fixed in position.
Gases take the shape of their containers but liquids do not because gas particles
have the ability to flow but liquid particles do not.
Gases can have larger changes in volume than liquids can because gas particles
expand and contract but liquid particles do not.
Gases are more readily compressed than liquids are because there is more space
between the particles in a gas than in a liquid.
Here we need to see the differences between a liquid and a gas, and how that affects the volume and effects of pressure on them.
The correct option is:
Gases are more readily compressed than liquids are because there is more space between the particles in a gas than in a liquid.
So we have two syringes, one with air and the other with water.
The student applies the same amount of pressure to both of them, but as water is denser than air, in a given change dV of volume in the syringe, the mass of water is larger than the mass of air.
This means that for the same pressure, we should expect the change in volume to be smaller in the syringe with water.
Why this happens?
Gases are more readily compressed than liquids are because there is more space between the particles in a gas than in a liquid.
This means that for the air is easier to be compressed (the distance between particles is larger, so the same pressure compresses more a gas than a liquid) and exit the syringe than for the water, and this translates to the change in volume per unit of pressure applied, which is larger for gases than liquids.
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does the character of a bond become more covalent or ionic when the difference in electronegativity of the bonded atoms increases?
Answer:
The grater the difference in electronegativity, the more ionic the bond
hello can anyone help?
Potassium, K, forms a compound with fluorine, F
Which statements about this compound are correct?
1) The compound is ionic.
2) The formula of the compound is KF.
3) The compound is soluble in water.
A) 1 2 and 3
B) 1 and 2 only.
C) 1 and 3 only
D) 2 and 3 only
Answer:
A ) 1, 2 and 3
Explanation:
1 ) is correct because,
K donates 1 electron
F gain 1 electron from K.
If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.
2 ) is correct because,
K + F -----> KF
3 ) is correct because,
KF is soluble in cold water; very soluble in hot water.
Describe what does happen to the electrons when metal atoms are bonded together.
Answer: In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions. Metals are shiny.
Explanation: Hope this helped!
how many sulfide ions are in 15 dg of sodium sulfide?
There are 1.16x10²² sulfide ions (S²⁻) in 15 dg of sodium sulfide (Na₂S).
The equation for sodium sulfide is the following:
Na₂S → 2Na⁺ + S²⁻ (1)
So from equation (1), we can see that in 1 mol of sodium sulfide we have 1 mol of sulfide ions and 2 moles of sodium ions.
First, let's find the number of moles of Na₂S
[tex] n_{Na_{2}S} = \frac{m_{Na_{2}S}}{M_{Na_{2}S}} [/tex] (2)
Where:
[tex]m_{Na_{2}S}[/tex]: is the mass of Na₂S = 15 dg = 1.5 g
[tex]M_{Na_{2}S}[/tex]: is the molar mass of Na₂S = 78.0452 g/mol
The number of moles of Na₂S is (eq 2):
[tex] n_{Na_{2}S} = \frac{1.5 g}{78.0452 g/mol} = 0.0192 \:mol [/tex]
We can find the number of ions of S²⁻ with Avogadro's number, knowing that the number of moles of Na₂S is equal to the number of moles of S²⁻ (eq 1).
[tex] ions_{S^{2-}} = \frac{6.022 \cdot 10^{23} \:ions}{1\:mol}*0.0192 \:mol = 1.16 \cdot 10^{22} \:ions [/tex]
Therefore, there are 1.16x10²² sulfide ions in 15 dg of sodium sulfide.
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An element X exists in three forms A, B and C in the ratio 1:2:3. If C has 10 protonsand the number of neutrons in A, B and C are 10, 11 and 12 respectively,Give the following:(i) Representation of form C of the element X(ii) Electronic configuration of form B of the element(iii) Calculate the average atomic mass.
x21 +ANSWER
(i) Ne-22
(ii)1s2s22p6
(iii)21.3
An element X exists in three forms A, B and C in the ratio 1:2:3. If C has 10 protons and the number of neutrons in A, B and C are 10, 11 and 12 respectively,Give the following:(i) Representation of form C of the element X(ii) Electronic configuration of form B of the element(iii) Calculate the average atomic mass.
(i)C has 10 protons and 12 neutrons so a mass of 10 +12 =22
element 10 is Neon (Ne) so this isotope is Ne-22
(ii) they all have the sane atomic number so the same number of electrons
with an electronic structure of 1s2s22p6
(iii) A weighs 20, B weighs 21, C weighs 22
the ratio is 1:2:3
weighted average weight is therefor
(1X20 +2X21 +3X22)/6 =21.3
WILLL GIVE BRAINLIEST IF YOU ANSWERRR PLEASEEEE IM LITERALLY BEGGING YOU I PUT THIS QUESTION IN SOO MANY TIMES I HAVEN'T GOTTEN AN ANSWER PLEASEEE HELPPP
Answer:
The answer is 375.54 g of AgBr
Explanation:
Mass (g) = Concentration (mol/L) x volume (L) x Molecular Weight of AgBr (g/mol)
Mass = 2M x 1L x 187.77 g/mol
Mass = 375.54g
If you increase the force on an object, its acceleration increases. True or false
Answer:
true
Explanation:
from Newton's second law of motion ,we can understand that acceleration of a body is directly proportional to the force applied on it and inversely proportional to its mass ,so as the force applied increase,the acceleration also increases
Which of the following is a liquid someone help!!!!!
All live things (plants included) must turn food into _________ that can be used (___________), and then release waste products.
Earth science!
Answer:
I think it is
1. energy
2. respiration
What is the formula for Water?
Name full name element's name
Answer:
2 Hydrogen atoms and 1 Oxygen atoms makes water
Explanation:
Hope this helps^^
Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,
Explanation: i hopes it helps :)
______Is analyzed by qualitative methods
A. The identify of the poison used in a murder.
B. The amount of poison used in a murder.
C. The location of the poison used in a murder.
D. The method used by the suspect to kill the person.
Answer:
A. The identify of the poison used in a murder.
Explanation:
a sheet of pure aluminum loses heat. what will happen to the aluminum atoms
Answer:
they will slow down i think
Explanation:
losing heat means it cools down so atoms are slower
What does a
map
scale measure?
Answer:
Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.
Explanation:
For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.
What is the element name for mg2SiO4
Answer:
forsterite
Explanation:
how many different products are formed from the dehydrohalogenation of 2-bromobutane?
Answer:
3 1-butene, Z-2-butene, and E-2-butene.
Explanation:
Since 2-butene exists as two stereoisomers, three products are possible from the reaction of potassium ethoxide with 2-bromobutane. The products are, of course, 1-butene, Z-2-butene, and E-2-butene.
write the formulas of alkanes that contain three, five, seven, and nine carbon atoms
Answer:
Explanation:
Name Number of Carbon Atoms Molecular Formula
methane 1 CH4
ethane 2 C2H6
propane 3 C3H8
butane 4 C4H10
How does a balanced chemical equation demonstrate the Law of Conservation of Mass? (1 point)
O it shows that only physical changes follow the Law of Conservation of Mass
O it shows that no atoms have been gained or lost during the reaction
O it shows that the properties of the elements stay the same after the reaction
O it shows that all compounds remain bonded after the reaction
Explanation:
A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow. enjoy
Answer:
It show that no atoms have been gained or lost during reaction
Explanation:
NO LINKSSSS PLEASE!!!
Which of the following is an example of a gas solution?
Select one:
a. Air in water.
b. Antifreeze in water.
c. Bronze alloy.
d. Helium in air.
d- Helium in air me air is made up of various gases
What is the name of this alkene?
Answer:the name is cc bc it 4920 and hehe i just want points thank you
Explanation: lol did wsiw skwks thanks for points
A compound formed from a metal and a non-metal will have which type of bond?
A. Covalent
B. Hydrogen
C. Ionic
D. Atomic
it's an ionic bond
btw i love your profile picture never understand is one of my favorites
Is there a relationship between atomie radius and electronegativity? Why or why not?
Answer:
Yes
Explanation:
Electronegativity is the tendency for atoms to keep electrons closer to them. So, if the atoms are smaller there, there is a stronger pull on the electrons to keep them closer. So, the larger the atom get, due to electron shielding, it become less electro negative. I hope this help. You might get a better explanation from Khan Academy's video on Electronegativity
Answer:
A relationship is intuitively expected
Does electronegativity relate to atomic radius? A relationship is intuitively expected between electronegativity and radius: the size of an atom is determined by the distribution of electrons around its nucleus. The closer the electrons are to the nucleus, the more tightly they are bound, thus increasing the electronegativity of the atom.
Explanation:
what happens when chocolate get heated?
hope it helps
Please help me with chem, it would be very appreciated!
why it is necessary to draw a Lewis diagram before predicting the shape of a molecule
To determine the shapes of molecules, we must become acquainted with the Lewis electron dot structure. Although the Lewis theory does not determine the shapes of molecules, it is the first step in predicting shapes of molecules. The Lewis structure helps us identify the bond pairs and the lone pairs.
Please mark BRAINLIEST.
why the core is metallic and the lower mantle is not.
Answer:
due to the overlaying layers of strata (layers of earth) an high pressure is created at the core. due to this it behaves like an solid rether than being a liquid... the lower mantle is not solid because in this case the overlaying strata doesn't produce that much pressure on it..
Explanation:
brainliest plz
as a bystander, the _______ approach doesn’t work when drugs or alcohol are involved, as the person you’re trying to stop is more likely to become defensive or hostile.
When trying to step into an argument or misunderstanding between people as a bystander with drugs and alcohol involved, the direct approach won't work.
When trying to make peace between quarelling individuals as a bystander, the direct approach would fail if alcohol or drugs is being held as the prsin might see you as a villian. Only when the person knows and trusts you will this approach work. Hence, when drugs or alcohol is involved, other methods of rendering help should be employed.Therefore, the direct approach won't work in the this scenario.
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Help meeeeeeeeeeeeeee
Answer:
4) 2Na + Cl2 → 2NaCl
5) 2Mg + O2 → MgO
6) 2H2 + 2O2 → 2H2O
Explanation:
4) In order for it to be well balanced, yeah you've got to add 2 in front of Na before the reaction and after the reaction.
5) Add 2 in front of Mg bcuz of the same reason in number 4 but you don't have to add 2 in front of the others bcuz it's alrd well balanced.
6) Tbh for this one, it got me staring at my cat until he freaks out but like yeahh, I tried :')
1. Given the word equation:
sodium chlorate → sodium chloride + oxygen
Which type of chemical reaction is represented by
this equation?
A) double replacement
B) single replacement
C) decomposition
D) synthesis
Answer:
Decompositon
Explanation:
Sodium chlorate → Sodium Chloride + Oxygen
Sodium chlorate is reactant.
Sodium chloride + Oxygen is the product.
Definition : -
Decomposition reaction is a chemical reaction in which a single reactant breaks down to simpler products.
Bromine is an element that often gains an electron to become a negatively charged ion. Potassium is an element that often loses an electron to become a positively charged ion.
Why are bromine and potassium likely to react with one another?
Bromine needs to gain one more electron to have a noble gas configuration or 8 valence electrons, & potassium needs to lose one so they make a transference of electrons in an ionic bond.
What are the functions of ionic bonding?Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities, and is the primary interaction occurring in ionic compounds.
Ionic bonding results in compounds known as ionic, or electrovalent, compounds, which are best exemplified by the compounds formed between nonmetals and the alkali and alkaline-earth metals.
The charge of a cation or anion is denoted as a superscript after the formula of the ion. A + sign denotes a positive charge resulting from loss of electrons. A - sign denotes a negative charge resulting from gain of electrons.
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