Answer:
no it is a heterogeneous mixture because salt and pepper are not mixed uniformly.
Answer fast! All transition metals have _______ valence electrons.
Answer:
2 Answers. Most transition metals have 2 valence electrons. Valence electrons are the sum total of all the electrons in the highest energy level (principal quantum number n). Most transition metals have an electron configuration that is ns2(n−1)d , so those ns2 electrons are the valence electrons.
Explanation:
A metal block with a temperature of 30°C is placed inside a bowl of water with a temperature of 45°C. Which of the following will occur when the metal block is placed inside the Bowl water?
Answer: The water will cool down
Explanation:
Both the water and the metal block will reach Thermal equilibrium which is a state where neither of them will be transferring energy (heat) to the other because they are now of the same temperature.
For instance, if you put a cold can in water to warm it up, the water will keep reducing in temperature while the cold can increases in temperature until both the can and the water have the same temperature.
The same logic applies here. The metal block is cooler than the water so the water will cool down and the metal block will get more heat until both of them achieve a temperature somewhere between the temperatures that both the water and the block started off with.
Two students made the Lewis dot diagrams of H2O. The diagrams are as shown.
Which student drew the correct Lewis dot diagram?
A. Only Student A
B. Only Student B
C. Both Student A and Student B
D. Neither Student A nor Student B
Answer: only student A
Explanation: i’m
not a teacher just a student cheating helping kids<3
Lewis structure depicts the shared and the nonshared valence electron in the molecule. The diagram made by student A is correct. Thus, option A is correct.
What is Lewis dot structure?Lewis dot structure is the representation of the lone pairs of electrons or the unshared valence electron pair of the atom or the molecule. They also represent the shared bonds between the same or different atoms.
The structure follows the octet rule and represents the shared, lost, or gained electron as the dot above or at the side of the atom. In a water molecule oxygen has 6 electrons in the outer shell and hydrogen has one each.
The hydrogen is in bonds with the oxygen atom that shares the electron between them to complete their octet. Two pairs of electrons on oxygen are non- shared and are represented as lewis dots above the oxygen atom.
Therefore, only student A correctly drew the lewis structure.
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What is one source of CO?
Answer:
Carbon monoxide (CO)—a colorless, odorless, tasteless, and toxic air pollutant—is produced in the incomplete combustion of carbon-containing fuels, such as gasoline, natural gas, oil, coal, and wood. The largest anthropogenic source of CO in the United States is vehicle emissions.
Explanation:
Hope this helps- good Luck! ^w
to find the mass number you add the protons + the electrons
true or false
Answer:
false. you add the protons and neutrons
Answer:
false..
mass no. =protons + neutrons
Explanation:
mrk as brainliest Pls and follow me..
I'm new here
Hydrogen is considered a___________________
Answer:
《HOPE IT WILL HELP YOU 》
Explanation:
Alternative fuel under the energy policy act of 1992.
Two descriptions about physical quantities are given below:
Quantity A: It remains constant.
Quantity B: It depends on gravitational pull.
What quantities are these most likely describing?
a Both Quantity A and Quantity B are mass.
b Both Quantity A and Quantity B are weight.
c Quantity A is weight and Quantity B is mass.
d Quantity A is mass and Quantity B is weight.
Answer:
quantity A is mass and quantity B is wieght
Answer:
D. is correct, like the first person said
Explanation:
How many atoms of sodium are in 3.80 mol of sodium, Na?
Answer:
2.29 × 10²⁴ atoms Na
Explanation:
Step 1: Define
Avagadro's Number: 6.02 × 10²³ atoms, molecules, formula units, etc.
Step 2: Stoichiometry
[tex]3.80 \hspace{3} mol \hspace{3} Na(\frac{6.02(10)^{23} \hspace{3} atoms \hspace{3} Na}{1 \hspace{3} mol \hspace{3} Na} )[/tex] = 2.2876 × 10²⁴ atoms Na
Step 3: Simplify
We have 3 sig figs.
2.2876 × 10²⁴ atoms Na ≈ 2.29 × 10²⁴ atoms Na
How does the electron-cloud model describe electrons? (1 point)
The anci position of an electron can be known.
An electron can be found at certain distances from the nucleus. An electron has a high probability of being in certain regions.
Each electron follows a specific path around the nucleus.
Answer:
An electron has a high probability of being in certain regions.
What is the density if the Mass is 138g and the Volume is 100mL?
Answer:
1.38 g/ml
Explanation:
density is equal to mass divided by volume so divide 138 by 100 and your answer would be 1.38
hope it helped
[URGENT. WILL GIVE BRAINLIEST] explain how distance and the number of protons in the nucleus affects the force of attraction between electrons and protons
Answer: kk mark the other dude brainlist
Explanation:
How can you tell the most abundant isotope?
A. It has the largest mass.
B. Its mass is farther from the average.
C. It’s mass is closest to the average.
Answer:
C: the mass is closest to the average
is there any way the pandemic helps this society?
[tex]22 \times 12[/tex]
Answer:
u meant the answer to this ques
Explanation:
22
×12
------
44
22 ×
----------
264
-----------
or the answer can be 22×12=264
What is the electron configuration for helium (He)?
A. 1s1
B. 1s2
C. 1s22s1
D. 1s22s2
Answer :
B. 1s2
this is your answer....
The electronic configuration is the system of the electron distribution in the shells of the atom. The electronic configuration for He is 1s² as it is a noble gas. Thus, option B is correct.
What is electronic configuration?The electronic configuration is the depiction of the electrons in the orbital level of the atoms around the nucleus. The electrons are distributed in the four orbitals namely, s, p, d, and f.
The orbitals have different sub-levels and can accommodate a different number of electrons. The electronic configuration of helium atom with atomic number 2 can be written as, 1s².
The s orbital can accommodate only two electrons in them and helium having only two electrons gets completely filled. Helium being the inert gas has the most stable configuration.
Therefore, 1s² is the electronic configuration of He.
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HelpMe please !!!!!!!! Hey
Answer:neutralization
Explanation:The reaction of an acid with a base is called a neutralization reaction. The products of this reaction are a salt and water.
Answer:
neutralization
Explanation:
i think
Tiny water droplets in the air disperse the white light of the sun into a rainbow. What is the energy of a photon from the red portion of the rainbow if it has a frequency of 4.57 × 10^14s^–1?
The answer is :
3.02 X 10–19 J
PLEASE HELP ILL GIVE BRIANLIST ANSWER
Describe how evaporation and condensation work together to create earth's water cycle
Answer: when water is evaporated from the earth whether that be from bodies of water or plants, when it goes up higher, the temperature drops, causing the water droplets to condense, which means form water. This creates clouds and when the clouds get too big and full, precipitation (rain) happens and the rain falls to the earth. This cycle is then repeated.
Explanation:
The earth has three main chemical layers, these layers formed from a process called
Answer:
The process of forming the iron - rich core, the low density crust which is also rich in silicon, oxygen, aluminum, and the intermediate density mantle rich in silicon, oxygen, and magnesium is called the differentiation. Thus, the answer to this item is letter A.
Explanation:
All of the following are ways energy is transferred EXCEPT ______.
use of batteries
movement of waves
movement of objects
movement of heat
Answer:
use of batteries
Explanation:
while im not 100% on this, I know the energy transferred between objects is heat and all three of the other answers cause heat or movement of objects and batteries do not.
Energy can be transformed from one form to the other and can tranfered from one medium to the other. All the given are ways through which energy is transferred except the movement of objects.
What is energy conservation?Energy can neither be created nor be destroyed. Thus total energy of a system will be conserved. However, energy can be transformed from one form to the other.
For example in batteries the chemical energy is converted into electrical energy where, the energy is transferred to different electrical components.
Similarly, the electrical energy is converting to mechanical energy and we make the devices working. When an object stays at rest the energy stored in it is called potential energy.
The energy generated by virtue of motion of a body is called kinetic energy. Therefore, movement of an object results in the transformation of potential energy into kinetic energy. But here the energy is not transferred to any other thing.
Movement of heat is the transfer of thermal energy.Movement of waves is the transfer of energy. Thus option C is correct.
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Bohr shows that electrons stay in discrete energy levels around the nucleus.
A. True
B. False
Answer:
that is definitely false at least i think it is.
Explanation:
What is the mass of a 350 cm3 sample of pure silicon with a density of 2.336 g/cm3?
Answer:
The answer is
817.6 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume of silicon = 350 cm³
density = 2.336 g/cm³
It's mass is
mass = 350 × 2.336
We have the final answer as
817.6 gHope this helps you
Answer:
817.6g
Explanation:
The formula is [ m = dv ] where d = density and v = volume.
m = 2.336*350
m = 817.6
Best of Luck!
which of these is a chemical property of a material?
I need help with this question
Answer:
Calcium Sulfide. The Lewis Structure shows it as CaS
Explanation:
Calcium is considered a metal on the periodic table, while sulfur is a non-metal. Calcium has a 2+ ionic charge while sulfur has a 2- ionic charge. Since you want a charge of 0, the Calcium ionic charge of 2+ and the sulfur ionic charge of 2- cancel out, since 2+(-2)= 0
PLEASE HELP!! What is the chemical equation for soot?
Answer:
C3H
Explanation:
Initially these primary suit particles have roughly the composition and each is actually made up of several thousand carbon Adams the empirical formula suggest cycle is highly unders and unsaturated made structural element
Answer:
C3H)n
Explanation:
How are beta particles similar to alpha particles?
The beta particles are similar to alpha particles in the way that they both are used in the treatment of cancer.
What are the types of radioactive particles?Alpha particles, beta particles, and gamma rays are the three most frequent forms of radiation.
Two protons and two neutrons are joined together to form the alpha particle, which is positively charged.When a neutron becomes a proton and a high-energy electron, it generates a beta particle. The proton remains in the nucleus, but the electron is released as a beta particle from the atom.Similarity between beta and alpha particle is that they both are used in the treatment of cancer.
Hence both particles are used in the treatment of cancer.
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How many molecules are in the following formula?
2(NH4)3PO4
Answer:15 I think
Explanation:
how many grams in a kilogram,how many quarts are in a pint and if how many ml of h20 = 1g
Answer:
1 g + 10 g
Explanation:
Answer:
there are a thousand grams in a kilo
How do solute concentrations affect the rate of osmosis within the cell?
Answer:
Image result for How do solute concentrations affect the rate of osmosis within the cell?
Concentration gradient - The movement of osmosis is affected by the concentration gradient; the lower the concentration of the solute within a solvent, the faster osmosis will occur in that solvent.
I think this is it^^^
Explanation:
What is the scientific notation of 65000?
Answer:
the answer is 6.5 x 10^4
Answer:
6.5 x 10^4
Explanation:
Who was the first person to come up with the idea of the "atom?"
Answer:
Democritus
Explanation:
Democritus first introduced the idea of the atom almost 2500 years ago. Democritus was an important philosopher however if your talking about how the atom is today look at first rudimentary pudding model by JJ Thomson first design then its Neils Bohr whos model we look at today
