Answer:
CaS
Explanation:
Calcium sulfide is the chemical compound with the formula CaS.
describe some acidic oxides that can be prepared by the thermal decomposition of nitrates and carbonates.
Answer:
nitrogen dioxide and oxygen gas
Explanation:
the compounds are white solids and brown nitrogen dioxide and oxygen gases are also given off when heated.
Write the complete ground-state electron configuration of B^3+
No links please!
Answer:
Explanation:
[He] 2s2 2p1
4. Determine how many molecules are in 7.00 mol Fe2O3
I would divided it to get the anwser and then moloeces
Explanation:
Divide
I will mark brainlist
What is the concentration of a solution that contains 12 moles of solute in 4 liters of solution?
• 6M
• 12M
• 7M
• 3M
Answer:
Molarity of a solution is defined as number of moles of solute per litre of solution.Mathematically we can write
molarity = (number of moles of solute) / (volume of solution in litres)
It's units are mol/L also denoted by M.
So for this question answer is 6/2 =3mol/L Or 3M
Ammonia is made up of nitrogen and hydrogen. Nitrogen is in Group 15 of the periodic table, and hydrogen is in Group 1. Which statement about the bonds in a molecule of ammonia is correct?
Each nitrogen atom is bonded to two hydrogen atoms.
Each hydrogen atom is bonded to two nitrogen atoms.
Each nitrogen atom is bonded to three hydrogen atoms.
Each hydrogen atom is bonded to three nitrogen atoms.
In ammonia, each nitrogen atom is bonded to three hydrogen atoms.
The groups in the periodic table contain elements that share the same chemical reactivity while elements in the same period only have the same total number of shells.
Nitrogen is in group 15 while hydrogen is in group 1. In ammonia, each nitrogen atom shares three electrons with hydrogen atoms. Hence in ammonia, each nitrogen atom is bonded to three hydrogen atoms.
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A student practicing for track ran 250 meters in 25 seconds what was her speed in m/ seconds
PLEASE HELP ASAP I NEED HEP PLEASE ITS DUE TODAY
(May not be 100% correct as there may be more context, but I hope this helps! Have a nice day!)
We can tell it won't be Claim 1 as Claim 1 compares a reddish-brown substance to a gray/white substance.
I am going to go with Claim 3 is most supported by the evidence because of the three descriptions of the different substances, none of them match.
What is the molar mass of a gas with a density of 3.45 g/L at a
temperature of 280 K and a pressure of 100 kPa?
Answer:80.3
Explanation
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. The the molar mass of gas is 86.25g/mol.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density = Mass of the rock ÷volume marked on the graduated cylinder
In 1L of solution the mass of glass is 3.45 g
Ideal gas law
PV=nRT
P= pressure of gas = 100 kPa= 100000Pa=0.98atm
V=1L= volume of gas
n= number of moles=?
R= gas constant = 0.0821atmK⁻¹mol⁻¹
T= temperature=280 K
Substituting the values in ideal gas equation
P×V=n×R×T
P×V=n×R×T
0.98atm×1=n×0.0821×280 K
n=0.04mole
n= given mass ÷Molar mass
Molar mass = 3.45 g ÷0.04mole=86.25g/mol
Therefore the molar mass of gas is 86.25g/mol.
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Filtration is useful for separating
Answer:
insoluble solid from a liquid.
Answer:
Preparing coffee and tea
Explanation:
The process of releasing energy through the spitting of an atom is:
Answer:
When an atom splits into two parts, either through natural decay or when instigated within a lab, it releases energy. This process is known as fission.
Explanation:
Fission
It’s 10pm at 45°W. What time will it be at 45°E?
Answer:
11:30am
Explanation:
45 + 45 = 90
90 = 1 hrs 30 mins
10 pm + 1 hrs 30 mins
= 11:30 am
Silver plating uses the reaction How many moles of electrons must pass through an electrolytic cell for silver plating in order to plate 3 moles of ag
The number of mole of electron that must pass through an electrolytic cell for silver plating in order to plate 3 moles of Ag is 3 moles of electrons
We'll begin by writing the balanced equation for the reaction to determine how many mole of electron will yield 1 mole of Ag.
Ag⁺ + e —> Ag
From the balanced equation above,
1 mole of Ag required 1 mole of electron.
With the above information, we can obtain the number of electrons needed to produce 3 moles of Ag. This can be obtained as follow:From the balanced equation above,
1 mole of Ag required 1 mole of electron.
Therefore,
3 moles of Ag will also require 3 moles of electrons
Thus, 3 moles of electrons is needed to yield 3 moles of Ag
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nvm.mmmmmmmmmmmmmmmmmmmmm
o_o mmmmmmmmmmmmm hjkkkjc
Answer:
I'm not the animal Crossing
how does the muscular system depend on the skeletal system
Answer: Vertebrates move by the actions of muscles on bones. Tendons attach many skeletal muscles across joints, allowing muscle contraction to move the bones across the joint.
Explanation:
Answer: The muscular system works in conjunction with the skeleton to produce movement of the limbs and body.
Marking as brainliest!
Answer:
??????
Explanation:
50 POINTS !! I have a science project that I need help with its called pH
Project: Researching Acid Rain if anyone knows the answer or has down it before let me know.
Answer:
Acidic solutions are measured to have lower pH values than basic or alkaline solutions.
Explanation:
So basically acids have a lower pH than other liquids like water.
Write a half equation for each of the following.
a) The process at the positive electrode in the electrolysis of molten
calcium oxide.
b) The process at the negative electrode in the electrolysis of molten
potassium bromide.
Answer: Write a half equation for each of the following.
a) The process at the positive electrode in the electrolysis of molten
calcium oxide.
b) The process at the negative electrode in the electrolysis of molten
potassium bromide.
Explanation: a) The process at the positive electrode in the electrolysis of molten
calcium oxide.
2
The factors
on which
electronegativity depends
Upon
Atoms are thermally promoted to the excited state through collisions in the plasma. As they return to a lower energy state, they emit photons.
a. True
b. False
Answer:
True
Explanation:
Lab: Thermal energy transfer
Answer:Thermal energy transfer involves the transfer of internal energy.
Explanation:
Three types of thermal energy transfer are conduction, convection and radiation.
What volume (in mL) of water must you add to 25.0 mL of a 0.250 M NaBr solution to produce a 0.0275 M solution? Assume the volumes are additive.
Answer:
The volume of water added to make the diluted solution is 118.68 mL.
To solve this question, we'll begin by calculating the volume of the diluted solution. This can be obtained as follow:
Volume of stock solution (V₁) = 25 mL
Molarity of stock solution (M₁) = 0.250 M
Molarity of diluted solution (M₂) = 0.0435 M
Volume of diluted solution (V₂) =?
The volume of the diluted solution can be obtained as follow:
M₁V₁ = M₂V₂
0.25 × 25 = 0.0435 × V₂
6.25 = 0.0435 × V₂
Divide both side by 0.0435
V₂ = 6.25 / 0.0435
V₂ = 143.68 mL
Thus, the volume of the diluted solution is 143.68 mL
Finally, we shall determine the volume of water added to make the diluted solution.
Volume of stock solution (V₁) = 25 mL
Volume of diluted solution (V₂) = 143.68 mL
Volume of water added =?
Volume of water added = (Volume of diluted solution) – (Volume of stock solution)
Volume of water added = 143.68 – 25
Volume of water added = 118.68 mL
Therefore, the volume of water added to make the diluted solution is 118.68 ml
HOPE IT'S HELPFULMARK ME BRAINLIESTWhat is the answer?
Answer:
What sub
Explanation:
WILL MARK BRAINLIEST!!
A chemical reaction produces formaldehyde, with a chemical formula of CH2O. Carbon is in Group 4A, oxygen is in Group 6A, and hydrogen is in Group 1A on the periodic table. In one to two sentences, describe the bonds in a molecule of formaldehyde in terms of valence electrons.
The formaldehyde has the molecular formula HCHO. Two C-H bonds have been present in the structure, while there has been the presence of one C=O bond.
Carbon belongs to group 4A and has been consisted of four valence electrons. In order to complete its octet, carbon gets covalently bonded with the hydrogen of the 1A group consisting of 1 valence electron.
The covalent bond between carbon and hydrogen results in the complete octet of the hydrogen, however, carbon has 2 valence electrons to be bonded to complete the octet.
The oxygen has been belonging to group 6A and has been consisted of 6 valence electrons. In order to complete the octet, oxygen required 2 valence electrons. The carbon bonds with the oxygen with the double bond completing the octet of the oxygen and carbon.
For more information about bonds in formaldehyde, refer to the link:
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Answer:
The bonds in a molecule of formaldehyde are that there is 2 C-H bonds and one C-O bond present. Since carbon is in group 4A meaning it has 4 valence electron, Hydrogen has 1 valence electron, and oxygen has 6 valence electron. Carbon and Hydrogen valance electrons can complete carbons octet. The other two valence electron of carbon and the six valence electron of oxygen can complete oxygens octet.
Explanation:
Which solid object has the highest specific heat?
-aluminum
-silver
-wood
-ice
Answer:
Aluminum
Explanation:
Because aluminum temperature changed less than the copper's did under the same condition. This, the aluminum must require more energy to change its temperature
Atoms cannot be split up into anything smaller.
ANSWER :
A :They can be split into smaller pieces…it’s called a nuclear reaction.
B : Atoms cannot be created nor destroyed, and they are indestructible; they cannot be broken into smaller parts. This was based on the Law of Conservation of Mass.
IM SO CONFUSED RN WHICH IS CORRECT ANYONE SMART PLEASE HELP I GIVE BRAINLIEST
Answer:
A because nuclear reaction i think lol
Explanation:
A foliation
B. grains
C. igneous rock
D. lava
E lithification
1. a naturally occurring solid mixture made of
minerals, rock fragments, organic matter, or glass
2. the individual particles in rocks
3. type of rock that forms when magma or lava
cools and hardens
4. molten rock found inside Earth
5. molten rock that erupts onto Earth's surface
6. type of rock made of layers that are pressed or
cemented together
7. process through which sediment turns into rock
8. type of rock that results from changes that occur
in existing rocks
9. name for the original rocks that are changed into
metamorphic rocks
10. Metamorphic rock sometimes has this layered
appearance.
F.
magma
G. metamorphic
H. parent rock
i rock
J. sedimentary
Answer:
B.Grains
Explanation:
H.parent rock
Which process represents chemical weathering?
Process A: Waves in a River lift rocks which crash down to the river bed and break
Process B: Water in the cracks of rocks freezes and breaks open the rocks
Process C: An organic acid produced by rotting vegetation makes holes in rocks
Process D: Roots of plants push against rocks and make cracks in them
Answer:
The answer is Process B
Explanation:
the process B represents chemical weathering
The chemistry of anhydrides is similar to that of acid chlorides, although they react more slowly.
a. True
b. False
Answer:
both
Explanation:
Who is the Chief of GTOCP
Answer:
???
Explanation:
If you have a 200kg man and a 50 kg little girl standing at the top of a diving platform that is 8 ft. above a pool. Which person would have more potential energy? Explain why.
Answer:the 50 kg girl because she is 1/4th of the weight of the 200 kg man which would fall down faster causing him to have more kinetic energy and the little girl would have more more potential energy
Explanation: because in different …and ur stuck on question 10 of unit 4 guided notes
