Answer:
2
Explanation:
because there are 2 sodiums and 2 chlorines on the right side
Where is the color rock located?
The ionic mobility of alkali metal ions in aqueous
solution is maximum for
Answer:
Rb+
hope it's right:)
..................................
Question 1 (1 point) Saved Please choose all that describe a series circuit. (If you did not attend live session and take notes, make sure you watch the recording before taking this assessment.) If there are many bulbs in a circuit with a battery (cell), it is very likely that the light will be brighter with each additional bulb. The electrons have multiple pathways to travel. The amount of current is the same at every point in a series circuit. A series circuit has no resistors. All of the parts of a series circuit-power source, wires, and devices-are connected along the same pathway
Answer: All of the parts of a series circuit-power source, wires, and devices-are connected along the same pathway, All of the parts of a series circuit-power source, wires, and devices-are connected along the same pathway. These two are correct.
Explanation:
1. How much heat is required to melt 15 grams of ice at 0°C?
Given :
15 gram of ice is kept at 0°C.
To Find :
How much heat is required to melt 15 grams of ice at 0°C.
Solution :
We know, specific heat of Ice, L = 334 J/g.
Heat required to melt m gram of ice to water at 0°C is :
[tex]H = mL\\\\H = 15\times 334\ J\\\\H = 5010\ J\\\\H = 5.01\ kJ[/tex]
Therefore, heat is required to melt 15 grams of ice at 0°C is 5.01 kJ.
Chemistry Question, Don't really know how to do it lol.
Answer: 17.2 g
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} HgS=\frac{20.0 g}{233g/mol}=0.085moles[/tex]
The balanced chemical equation is:
[tex]4HgS(s)+4CaO(s)\rightarrow 4Hg(l)+3CaS(s))+CaSO_4(s)[/tex]
According to stoichiometry :
4 moles of [tex]HgS[/tex] produce = 4 moles of [tex]Hg[/tex]
Thus 0.085 moles of [tex]HgS[/tex] will require=[tex]\frac{4}{4}\times 0.085=0.085moles[/tex] of [tex]Hg[/tex]
Mass of [tex]Hg=moles\times {\text {Molar mass}}=0.085moles\times 200.6g/mol=17.2g[/tex]
Thus 17.2 g of [tex]Hg[/tex] will be produced form 20.0 g of HgS.
When 2.2 grams of NaCl are poured into a solution of salt, the Naci
dissolves. What can be determined about the original solution from this
observation?
Answer:
The solution was unsaturated
Explanation:
what word does not fit? water, salt, carbon dioxide, iron, and why
Answer:
iron
Explanation:
the rest are chemical compouds like h20 and NaCl and cabron dioxide is one too
What is the independent variable in the reactivity of metals with hydrochloric acid
An independent variable in chemical reactions showing reactivity of metals with hydrochloric acid is concentration of acid.
What is chemical reaction?Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.
There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical reactions:
1) inorganic reactions
2)organic reactions
3) biochemical reactions
During chemical reactions atoms are rearranged and reactions are accompanied by an energy change as new substances are formed.
Learn more about chemical reactions,here:
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What happens when a system loses energy
Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, system attains stability when a system loses energy.
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
q = n ×ΔH
where
q = amount of heat
n = no of moles
ΔH = enthalpy
n = w / M.M
w = given mass
M.M = molar mass
If the system loses a certain amount of energy, that same amount of energy is gained by the surroundings. The enthalpy value comes out to be negative. The reaction is called exothermic reaction. System attains stability when a system loses energy.
Therefore, system attains stability when a system loses energy.
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How to identify a chemical reaction
Explanation:
We can tell if a chemical reaction has taken place when one or more of the following things happen:
1.There has been a colour change inside the reaction flask.
2. A gas has formed. Usually we know a gas has formed when we can see bubbles.
3.A solid has formed.
hope this answer helps!!!
Explanation:
A Chemical Reaction Is Usally Accompaneid by easly observed physical effects such as the emissions of heat and light the information of a precipitate the evaluation of gas,or a color change
What are MEASURABLE PROPERTIES
Answer:
properties that have volume, mass, weight, length or circumference.
Explanation
these all can be measured
Hiya! I need to know a few things
Are the following compounds Ionic, covalent, or metallic?
NaI
lactose
iodine
Sn
Then these following I need to know if they are ionic, Nonpolar covalent, polar covalent, or metallic!
Iodine Chloride
Co(NO3)2
Sulfur, S8
Pb
Thank you in advance!
Answer:
metallic
Explanation:
Calculate the number of moles in 4.22x1022 molecules of H,O
Answer:
0.07 moles of water
Explanation:
Given data:
Number of molecules of water = 4.22×10²²
Number of moles of water = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules of water
4.22×10²² molecules × 1 mol /6.022 × 10²³ molecules
0.7 ×10⁻¹ mol
0.07 moles of water
A. A neap tide
B. A lunar eclipse
C. A spring tide
D. A solar eclipse
Please help!!! I’ll give brainlist
Answer:
the answer will be neap tide
TRUE or FALSE: The Periodic table is full of periodic trends and patterns.
True
False
Answer: false
Explanation:
What are subscripts?
Answer:
Subscripts are small numbers right next to the letters
Why are questions about philosophy religion not able to be answered through scientific inquiry be specific and use examples to support your answer
What is the oxidation state of Cl in HCIO2?
A. +3
B. -1
O C. -3
D. +4
Answer:
Bro,it's number A
+3
Explanation:
The oxidation number for chlorine in HClO2 is plus three because oxygen is more electronegative than chlorine and is assigned negative two for each oxygen and hydrogen had a plus one. The sum of oxidation numbers is equal to the charge on the molecule, in this case zero.
What happens when air masses collide?
Answer:
When two air masses collide they do not mix, instead they push against each other. If a cold air mass and a warm air mass meet then the warm air rises because it is lighter then cold air.The boundary where two air masses meet is called a front.
Explanation:
Have a fantaboulus daaaay, well ....thats all I have to saaaay!
I really need help on this please, I think C or A, but I don't really know??!
*WILL GIVE A BRAINIEST & 15 POINTS TO THE CORRECT ANSWER*
When an electron falls back to its original shell, the electron will...
A.) absorb energy as it goes to the excited state
B.) absorb energy as it goes to the ground state
C.) release energy as it goes to the excited state
D.) release energy as it goes to the ground state
B.) absorb energy as it goes to the ground state
Answer:
b
Explanation:
Do you agree or disagree with the scientists who downgraded Pluto?
Answer:
Maaaan f pluto
Explanation:
All my homies hate pluto
Well scientificly yes, I agree. This mainly is due to the fact that pluto does not meet the qualifications of a planet and behaves more similarly to the patterns of a dwarf planet. For example, pluto moves in an oblong cycle around the sun and not a "perfect circle". It almost seems that pluto is thrown off its path.
Which describes a property of water that allows plants to transfer it from their roots to their leaves? Water exhibits weak adhesion and cohesion, which allows capillary action to occur. Water exhibits strong adhesion and cohesion, which allows capillary action to occur. Water has low surface tension, which prevents capillary action from occurring. Water has high surface tension, which prevents capillary action from occurring.
Answer:
its b
Explanation:
Answer:
B. Water exhibits strong adhesion and cohesion, which allows capillary action to occur.
Metallic bonds allow for special properties. Which of the following are properties related to the existence of metallic bonds? Select all that apply.
ductile
good insulator
brittle
malleable
good conductor
Hydrochloric acid is stronger than carbonic acid.
True or False?
HELPPPPP PLEASEEE ILL MARK YOU BRAINLIESTTTTTT!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Ionic bonding occurs when atoms either gain or lose one or more valence electrons, resulting in the atom having either a negative or positive charge.
Through ionic bonding, an atom of each element will combine with the other to form a molecule, which is more stable since it now has a zero charge.
Explanation:
Answer:
Ionic bonding occurs when atoms either gain or lose one or more valence electrons, resulting in the atom having either a negative or positive charge.
Explanation:
Hope this helps!!:)
What percentage of a radioactive isotope remains after 4 half-lives?
Answer:
66.7%
Explanation:
hope this helps
Can a chemical bond be formed between the hydrogen cations H +?
Answer:
yes
Explanation:
Answer:
Yes it can
Explanation:
which of the following is a noble gas ?
What are the two properties of Graphite that are different from the properties of Diamond?
Answer:
Graphite is insoluble in water and organic solvents - for the same reason that diamond is insoluble. Attractions between solvent molecules and carbon atoms will never be strong enough to overcome the strong covalent bonds in graphite. conducts electricity.
Explanation:
Brainlest please?
