Answer:
insoluble solid from a liquid.
Answer:
Preparing coffee and tea
Explanation:
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
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.
What is the symbol of the new atom?
Also, is the atomic number 86?
Answer:
Rn
Explanation:
Rn is the symbol for radon with the atomic number of 86
Which of the following is a physical property of water?
O À
It is a liquid.
OB.
It reacts with many substances.
OC.
both of the above
4. Determine how many molecules are in 7.00 mol Fe2O3
I would divided it to get the anwser and then moloeces
Explanation:
Divide
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.
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.
why is it difficult to measure the mass of an atom?
Answer:
It's difficult to measure the mass of an atom because they are simply so tiny. It's not like we can just put it on a weighing scale, as it wouldn't show up at all
Answer:
Because atoms are much too small to measure individually and do not have charges, there is no convenient way to accurately measure absolute atomic masses.
How would you determine whether or not your precipitate was pure?
Explanation:
All precipitation gravimetric analyses share two important attributes. First, the precipitate must be of low solubility, of high purity, and of known composition if its mass is to reflect accurately the analyte's mass. Second, it must be easy to separate the precipitate from the reaction mixture.
The chemistry of anhydrides is similar to that of acid chlorides, although they react more slowly.
a. True
b. False
Answer:
both
Explanation:
7. What specific information about the atomic structure do the periods and groups give you?
Periods tell you...
Groups tell you...
Considering the definition of period, group and electronic configuration:
Periods tell you the energy level.Groups tell you number of electrons in the last occupied level or valence shell.The elements are arranged in horizontal rows, called periods, and in columns, called groups.
The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).
There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level.
Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4. These 4 sub-levels are called: s, p, d, f.
The placement of the elements in the periodic table is done taking into account the electronic configuration.
In each period, the elements whose last level of their electronic configuration coincides with the number of the period appear.
On the other hand, in each group appear the elements that present the same number of electrons in the last occupied level or valence shell.
In summary:
Periods tell you the energy level.Groups tell you number of electrons in the last occupied level or valence shell.Learn more:
brainly.com/question/19710066?referrer=searchResults brainly.com/question/20985070?referrer=searchResults brainly.com/question/13980678?referrer=searchResults brainly.com/question/8140611?referrer=searchResults brainly.com/question/21267620?referrer=searchResults brainly.com/question/8001694?referrer=searchResultsWhat is evidence?
A. A type of package
B. An expert on a topic
C. A claim made by a product
D. Data that support a hypothesis
Answer:
D. Data that support a hypothosis
Explanation:
Evidence needs to support a claim
Answer:
data that support a hypothesis
A student practicing for track ran 250 meters in 25 seconds what was her speed in m/ seconds
2
The factors
on which
electronegativity depends
Upon
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:
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
Learn more: https://brainly.com/question/24268101
Write the complete ground-state electron configuration of B^3+
No links please!
Answer:
Explanation:
[He] 2s2 2p1
Explain the second law of thermodynamic
About:
Explain the second law of thermodynamic
Answer:
The second law of thermodynamics is the law of physics which states that it is impossible to construct a heat engine operating in a cycle that solely converts the heat energy obtained from a reservoir at a certain temperature into mechanical work entirely.
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Hope it is useful...Marking as brainliest!
Answer:
??????
Explanation:
how many particles does one mole of sodium nitrate contain?
Hint: A mole is the entity that denotes 6.022×1023 particles.
86-proof bourbon has a molarity of 7.4 M ethanol, C2H5OH. Determine the number of millimoles of ethanol in a 750 mL bottle.
Answer:
Molarity of ETHL in a 750 ML bottle is 43777.5
Explanation:
Because 1 mole of ETHL is 58.37ML multiply it by 750ML
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
What is the answer?
Answer:
What sub
Explanation:
Calculate the mass of water produced when 2.65 g of butane reacts with excess oxygen.
Answer:The reaction of butane with sufficient/excess oxygen is as follows:
2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H₂O
To work out how much water is produced, we first need to convert 2.64g of butane to moles by dividing it by butane's molecular mass, which is 58g/mol. From this we can see that we have roughly 0.045mol of butane. Since 0.045 is 0.022 of 2, we multiply this to get 0.22mol of water produced. The last thing to do is to multiply this by 18g (the molecular mass of water) to get 3.96g of water produced.
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:
https://brainly.com/question/4905584
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:
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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Cấu hình electron nguyên tử của nitơ là
Answer:
1s2 2s2 2p3
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.
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.
