Answers
Answer:
answer is electron cloud model
Related Questions
what sea animals have moveable spines that they use for protection
Answers
Answer:
sea urchins
Explanation:
Answer:
sea urchins
Explanation:
i took the test
1) How many moles of hydrogen gas can be produced if 0.57 moles of hydrochloric
acid, HCl, reacts with excess solid zinc according to the following chemical
equation?
2 HCl + Zn → Hz + ZnCl2
Answers
Answer: 0.28 mol H2
Explanation:
0.57mol HCl 1mol H2
2mol Hcl
Hydrochloric acid and zinc show the displacement reaction to produce hydrogen gas and zinc chloride. 0.57 moles of hydrochloric acid and excess zinc react to produce 0.28 mol H₂.
What is a displacement reaction?A displacement reaction is the removal of one of the elements from the reactant with highly active species of the reactivity species to produce the products. It can be a single or double displacement reaction.
The balanced chemical displacement reaction is given as:
2 HCl + Zn → H₂ + ZnCl₂
Here, two hydrochloric acids react with zinc to form one mole of hydrogen gas and one mole of zinc chloride.
Given,
Hydrochloric acid = 0.57 moles
Using proportions to calculate moles as:
If 2 moles of HCl = 1 mole H₂
Then, 0.57 moles = X moles
X = 0.57 ÷ 2
= 0.28 mol H₂
Therefore, 0.57 mole HCl produces 0.28 moles of hydrogen gas.
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Mr. Green gave his students a set of items.
They had a toothpick, pencil, paper clip, safety pin, nail, and dime. He also gave them a magnet. He told them to predict which items are magnetic.
How can they test their predictions?
A.
weigh each of the items
B.
see which items stick to the pencil
C.
measure each of the items
D.
see which items stick to the magnet
Answers
Answer:
D. see which items stick to the magnet
Explanation:
To predict which items are magnetic, the students will have to test whether or not each item is attracted to the magnet. Only objects that are magnetic stick to a magnet, so all of the items that stick to the magnet should be magnetic.
Hopefully that's helpful! :)
which colour would you expect ekasilicon to be
Answers
Answer:
it would ether be gray to black or silver to gray and black
Explanation:
because of my calculation ekasillicon would be that color because of the eyes and because of your color seeing .
Name the 4 properties of waves.
Answers
Answer:
the 4 properties of waves are frequency, amplitude, wavelength, and speed.
Explanation:
Why is acetic acid called weak acid?
Answers
Answer:
because...it is not strong enough proton donor to be entirely converted to hydronium ions in aqueous solution...
Explanation:
lemme know whether that was helpful!
A mechanical pencil is 14 cm long. What is its length in mm?
Answers
Answer:
140mm................
When magnesium (Mg) metal is burned in the presence of oxygen (O2), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different than the individual properties of magnesium and oxygen because magnesium oxide is a compound and cannot be separated __________.
Answers
Answer:
a compound
Explanation:
Which of the following is the strongest covalent bond?
Single bond
Double bond
Triple bond
Hydrogen bond
Answers
Answer:
Triple bond is the strongest bond
Triple bonds are stronger than the equivalent single bonds or double bonds, with a bond order of three.
Answer:
single bond.In a single covalent bond, when the electrons are shared between two s orbitals, the resulting bond is a sigma (σ) bond . Sigma bonds are the strongest covalent chemical bonds....!!
Microscopes are used to see tiny organisms. The specimen is thin kept on the grid in this microscope, and can be magnified more than a million times and can be viewed in the monitor. Name the Microscope
Answers
Answer:
The electron microscope is the answer.
What is photosynthesis?
Answers
Explanation:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
Answer:
photosynthesis is the process of making food by green plants by using sunlight,carbon dioxide, water.
Please help need to turn in
Answers
Answer:
2. d
3. i
4. e
5. j
6. g
7. a
8. f
9. b
Explanation:
do a few searches when you have time to deepen understanding!
6. g
4. e
9. b
2. d
7. a
10. h
1. c
3. f
a volume of .5650 will exert
Answers
Answer: A volume of .5650 what? And what unit will be considered?
Calculate the number of moles in 1.622 grams of boron.
Answers
Answer:
0.147
Explanation:
Moles equals mass over AR/MR so 1.662 over 11 gives 0.147
In the modern periodic table elements are arranged in order based on the number of:
Answers
Explanation: The elements in the modern periodic table are arranged in order of their atomic numbers, which is the number of protons in the nuclei of the atoms of an element. Each element has a unique atomic number.
distinguizh between the 4 states ofmatter
Answers
Answer:
There are four natural states of matter: Solids, liquids, gases and plasma. ... Solids have a definite shape, as well as mass and volume, and do not conform to the shape of the container in which they are placed. Solids also have a high density, meaning that the particles are tightly packed together.
Explanation:
hope this helps! goodluck & enjoy the rest of ur day or night.
The angle formed by the nuclei of two surrounding atoms with the nucleus of the central atom in a structure is called a(n) ________angle. The value predicted for such an angle using the VSEPR theory would be 180 degrees, based upon geometry alone. This is referred to as the___________ bond angle. In practice, this value often deviates from the predicted value for various reasons.
Answers
The bond angle obtained based on the geometry of the molecule alone is known as the predicted bond angle.
When a compound is formed, the less electronegative atom in the compound is called the central atom in the molecule. The angle formed by the nuclei of two surrounding atoms with the nucleus of the central atom in a structure is called a bond angle.
The bond angle is usually based on the geometry of the molecule. The expected geometry can be deviated for certain reasons such as the presence of lone pairs on the central atom in the molecule. The bond angle obtained based on the geometry of the molecule alone is known as the predicted bond angle.
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Reactions cannot occur without a certain minimum amount of energy. What is this minimum amount of energy called?
the activation energy
the activated complex
the kinetic energy of reactants
the potential energy of products
Answers
It should be
“the activation energy”
What was the first person who invented a light bulb
Answers
Answer:
Thomas edison would be you're asnwer
Answer: The person who invented the light bulb was Thomas Edison
Explanation:
A 0.03 mol sample of NH4NO3 (s) is placed in a 1 L evacuated flask, which is then sealed and heated. The NH4NO3 (s) decomposes completely according to the balanced equation above. The total pressure in the flask measured at 400 K is closest to which of the following? (The value of the gas constant, R, is 0.082 L atm mol-1 K-1.)
a. 3 atm
b. 1 atm
c. 0.5 atm
d. 0.1 atm
e. 0.03 atm
Answers
The total pressure in the flask measured at 400 K is 1 atm
The correct answer to the question is Option B. 1 atm
From the question given above, the following data were obtained:
Number of mole (n) = 0.03 mole Volume (V) = 1 L Temperature (T) = 400 KGas constant (R) = 0.082 atm.L/Kmol Pressure (P) =?Using the ideal gas equation, we can obtain the pressure in the flask as follow:
PV = nRT
P × 1 = 0.03 × 0.082 × 400
P = 1 atmTherefore, the total pressure in the flask measured at 400 K is 1 atm
Learn more on ideal gas equation: https://brainly.com/question/4147359
Answer: a: 3 atm
Explanation:
0.03 mol NH4NO3 decomposes into 0.09 mol of gas total, thus we multiply 0.09 by 0.082 and 400K to get our answer of about 3 atm.
Nivel de energia maximo de 20Ca
Answers
Elements join together to form_____.
Answers
Answer:
compounds
Explanation:
A student dissolves ethanol (C2H5OH) in distilled water. In another container, he dissolves CaCl2, in distilled water. Will either of the solutions conduct electricity? If so which one?
Plz Help!
Answers
Answer: The CaCl2 solution will conduct electricity.
Answer:
i think that the CaCl2 solution will conduct electricity
Explanation:
im not sure but if im wrong im sorry
wsphorus-SL 3. In the isotope B-11, what does the 11 represent?
Answers
Answer:
Here boron-11 means the name of the element is boron and the mass number is 11
Explanation:
Elements that are usually dull, brittle and do not conduct electricity are know as______.
Points: 46
Answers
Answer:
nonmetal
Explanation:
.........
...
.
what element has 12 protons 12 neutrons and 11 electrons
Answers
Answer:
sodium atom
Explanation:
Part 1: Name the type of chemical reaction that occurs when magnesium chloride
solution (MgCl2) reacts with sodium carbonate solution (Na2CO3).
Part 2: Explain why aluminum (AI) would react with copper chloride (CuCl2) but not with
magnesium chloride (MgCl2).
Answers
Mg is ahead of Al in the electrochemical series and more reactive than Al hence Al does not react with MgCl2.
A chemical reaction is said to have occurred when new substances are formed. The reaction between magnesium chloride solution and sodium carbonate solution is a double decomposition reaction since the cations exchange anion partners in the product;
MgCl2(aq) + Na2CO3(aq) ------> MgCO3(s) + 2NaCl(aq)
We must note that a single replacement reaction depends on the relative positions of metals in the electrochemical series. Al can react with CuCl2 because Al is more reactive than copper and ahead of Cu in the electrochemical series. On the other hand, Mg is ahead of Al in the electrochemical series and more reactive than Al hence Al does not react with MgCl2.
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Give one use of magnesium chloride
Answers
Answer:
Magnesium Chloride is used as a precursor magnesium metals.
Explanation:
A protozoan gains shelter as it lives in the intestine of a termites, helping the termite to be able to digest the wood that it eats. This symbiotic relationship between the termite and protozoan is known as:
Answers
Answer:
The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of mutualism. Thank you for posting your question here at brainly. I hope the answer will help you.
formulas and nomenclature binary ionic compounds worksheet
Answers
To name the binary ionic compounds it is necessary to observe which is the metal and the non-metal that compose them.
This name is made as follows:
The name of the metal is shown.The name of the non-metal is presented in abbreviated form.Add the suffix "ide" at the end.An example of this can be seen in the binary ionic composite KCL that receives the name Potassium Chloride, since potassium is the metal and chlorine is the non-metal.
It is important to remember that binary ion compounds are electrically charged ionic molecules formed by a metal and not a non-metal.
You can find more information about ionic bonds at the link below:
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