Answer:
Normally, it explains that matter cannot be created or destroyed. It demonstrates different chemical reactions that help show the different transformations of the matter but will never destroy it or create it.
True or False: An equation is balanced by changing subscripts as needed
True
False
Answer: False
Explanation:
You have a graduated cylinder with 10 mL of water in it.
You add 300 g of lead weights, and the volume of the
water rises to 40 mL. What is the density of the lead?
Answer:
The answer is 10 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 300 g
volume = final volume of water - initial volume of water
volume = 40 - 10 = 30 mL
We have
[tex]density = \frac{300}{30} = \frac{30}{3} \\ [/tex]
We have the final answer as
10 g/mLHope this helps you
1. When electrical energy is used what type of energy is also produced and considered to be waste energy? Thermal energy Mechanical energy Nuclear energy Radiant energy
Answer:
Energia solar: é proveniente de uma fonte inesgotável: o Sol. Os painéis solares possuem células fotoelétricas que transformam a energia proveniente dos raios solares em energia elétrica. Tem a vantagem de não produzir danos ao meio ambiente.
Energia nuclear: energia térmica transformada em energia elétrica, é produzida nas usinas nucleares por meio de processos físico-químicos.
Energia eólica (ar em movimento): ela já foi utilizada para produzir energia mecânica nos moinhos. Atualmente é usada com o auxílio de turbinas, para produzir energia elétrica. É atraente por não causar danos ambientais e ter custo de produção baixo em relação a outras fontes alternativas de energia.
A energia elétrica também pode se transformar em outros tipos de energia ao chegar às residências ou em indústrias. Exemplos:
Energia térmica: quando vamos passar roupas, a energia elétrica é transformada em energia térmica através do ferro de passar.
Energia sonora e energia luminosa: recebemos iluminação em casa pela transformação da energia elétrica que, ao passar por uma lâmpada, torna-se incandescente, e o televisor nos permite receber a energia sonora.
Energia mecânica: usada nas indústrias automobilísticas para trabalhos pesados.
explain all ways your atom and symbol for it would change if you removed 2 electrons from the atom
Each atom/element has an electron configuration
The electron configuration shows the energy level of the electron
Each electron configuration has 4 quantum numbers, namely n, l, ml, and ms
n = the principall = the angular momentum / azimuthal ml = the magnetic ms = the electron-spinWe make an example of the element Mg which is in group 2 with the atomic number 12
Electron configuration of Mg: [Ne] 3s² or 1s² 2s² 2p⁶ 3s²
if Mg removes 2 electrons then Mg will form a positive ion (cation) Mg²⁺
This cation is included in the monatomic ion because it is formed from one element (in contrast to the polyatomic ion, which is formed from two or more elements such as SO₄²⁻, ClO₃⁻)
Electron configuration of Mg²⁺ : 1s² 2s² 2p⁶
So atoms can be positively or negatively charged depending on removing or attracting electrons
hey Google please how what types of elements are crop in P block right with example
Answer:
The elements of groups 13, 14, 15, 16, 17, 18 are called p block elements.examples: boron (B), aluminium (Al), gallium (Ga), indium (In), thallium (Tl),and so on
Explanation:
the neuron of the basic unit of structure and _____of the nervous system
I NEED THIS ASAP
thank you
Answer:
with out answer choices i will assume dendrites
Explanation:
What is the chemical formula for the limiting reactant in the reaction shown? Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.
1. What is the chemical formula for the limiting reactant in the reaction shown?
Answer: NO
2. Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.
Answer: 2NO + 2H2 —-> 2H2O + N2
Taking into account the definition of limiting reagent and balanced reaction, you get:
NO is the limiting reagent.The balanced reaction is 2 NO + 2 H₂ → 2 H₂O + 1 N₂What is the chemical formula for the limiting reactant in the reaction shown?The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
The reagent in excess will be the one that is not completely exhausted during the reaction, that is, they are those that are partially consumed, "excess" amount of that reagent. This is because the amount of product obtained from the reaction will always depend on the amount of limiting reagent in the reaction.
In this case, you can see that you have two reactants: NO and H₂. Having 4 moles of NO and 5 moles of H₂, you can see that no moles of NO are present in the products, but there is 1 mole of H₂.
This indicates that NO is the limiting reagent, since it is completely consumed, while there is 1 mole of H₂ in excess.
In summary, NO is the limiting reagent.
Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.Taking into account that the reagents are in stoichiometric proportions when the reagents are combined with each other without any of them, you can observe that the chemical equation is:
4 NO + 4 H₂ → 4 H₂O + 2 N₂
Dividing by 2 to get the lowest whole-number coefficients, the balanced chemical reaction is:
2 NO + 2 H₂ → 2 H₂O + 1 N₂
Learn more:
https://brainly.com/question/15235721what is a group that does not change and represents a normal pattern of response
Answer:
Constant
Explanation:
Trust
What is the relationship between the number of particles and the overall pressure?
When the volume of the gas is decreased, do the gas particles get smaller?
Yes or No?
Answer:
The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law). Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of molecules
Explanation:
this occurs when energy is added or removed
Answer:
melting
Explanation:
What happens to the pressure if the gas volume is cut in half while n and I are
held constant?
Answer: You can use Boyle's law, which states that pressure is inversely related to volume when other variables are held constant. If the final pressure of a gas is half of the initial, the volume must double if temperature is to remain the same.
Explanation:
By mistake, a quart of oil was dumped into a swimming pool that measures 25.0 m by 30.0 m. The density of the oil was 0.750 g/cm3. Assuming the oil spread into a uniform, thin layer over the water, how thick was the oil slick?
The oil slick thick = 1.256 x 10⁻⁴ cm
Further explanationVolume is a derivative quantity derived from the length of the principal
The unit of volume can be expressed in liters or milliliters or cubic meters
The conversion is
1 cc = 1 cm3
1 dm = 1 Liter
1 L = 1.06 quart
so for 1 quart = 0.943 L
[tex]\tt 0.943~L=0.943\times 10^{-3}m^3[/tex]
Volume of oil dumped = volume of swimming pool
[tex]\tt 0.943\times 10^{-3}~m^3=25\times 30\times h(h=thick)\\\\h=\dfrac{0.943\times 10^{-3}}{750~m^2}=1.257\times 10^{-6}~m=\boxed{\bold{1.256\times 10^{-4}~cm}}[/tex]
What is the darkest layer of soil at the top of the photograph called?
A. Aggregate
B. Subsoil
C. Bedrock
D. Topsoil
Answer: D.)Topsoil
Explanation: Have agriculture
what does gravity cause causes
Answer:
position, speed and acceleration
Which statement best explains why heating a liquid affects its viscosity?
O The molecules move faster at higher temperatures and overcome attractions more easily.
O The molecules move faster at higher temperatures, and the attractions between them increase.
O The molecules move slower at higher temperatures and overcome attractions more easily
The molecules move slower at higher temperatures, and the attractions between them decrease.
Answer:
A
Explanation:
took test I'm pretty sure and found respond else where
Answer:
A) The molecules move faster at higher temperatures and overcome attractions more easily.
Explanation:
Edg 2020
What is NOT an example of evidence of a super continent?
Question 5 options:
Fossil Record
Continuous Chain
Ocean Currents
Climate
A supercontinent is a landmass that consists of an aggregate mass of entire earth lithospheric landmasses. Pangaea was the last supercontinent that split about 200 million years ago.
The German geologist Alfred Wegener gave numerous pieces of evidence to support his theory of continental drift. These theories include fossil records, glacial chains, coal despites. In some places, he has also mentioned the presence of a similar climate type.Hence the option C is correct.
Learn more about the not an example of evidence of a supercontinent.
brainly.com/question/25322191.
Determine what elements are denoted by the following electron configurations:
1s22s22p63s23p4s23d104p65s1
Answer:
Electron Configurations - Solutions
Note: The electron configurations in this worksheet assume that lanthanum (La)
is the first element in the 4f block and that actinium (Ac) is the first element in the
5f block. If your periodic table doesn’t agree with this, your answers for elements
near the f-orbitals may be slightly different.
1) sodium 1s2
2s2
2p6
3s1
2) iron 1s2
2s2
2p6
3s2
3p6
4s2
3d6
3) bromine 1s2
2s2
2p6
3s2
3p6
4s2
3d104p5
4) barium 1s2
2s2
2p6
3s2
3p6
4s2
3d104p6
5s2
4d105p6
6s2
5) neptunium 1s2
2s2
2p6
3s2
3p6
4s2
3d104p6
5s2
4d105p6
6s2
4f145d106p6
7s2
5f5
6) cobalt [Ar] 4s2
3d7
7) silver [Kr] 5s2
4d9
8) tellurium [Kr] 5s2
4d105p4
9) radium [Rn] 7s2
10) lawrencium [Rn] 7s2
5f146d1
11) 1s2
2s2
2p6
3s2
3p4
sulfur
12) 1s2
2s2
2p6
3s2
3p6
4s2
3d104p6
5s1
rubidium
13) [Kr] 5s2
4d105p3
antimony
14) [Xe] 6s2
4f145d6
osmium
15) [Rn] 7s2
5f11 einsteinium
16) 1s2
2s2
2p6
3s2
3p6
4s2
4d104p5 not valid (take a look at “4d”)
17) 1s2
2s2
2p6
3s3
3d5
not valid (3p comes after 3s)
18) [Ra] 7s2
5f8
not valid (radium isn’t a noble gas)
19) [Kr] 5s2
4d105p5 valid
20) [Xe] not valid (an element can’t be its own electron configuration)
Which of the following is a result of intermolecular forces
A. Hydrogen bonds
B. Electronegativity
C. Double bonds
D. Covalent bonds
4. A 100.0 mL sample of 0.2516 M aqueous barium chloride was treated with an excess of sulfuric acid. The
resulting barium sulfate precipitate was filtered, dried, and found to have a mass of 4.9852 g. Compute the
percentage yield of barium sulfate in this process.
How do you find the mass number of an isotope?
Answer:
The mass number of an isotope is the total number of protons and neutrons in an atomic nucleus. If you know that a nucleus has 6 protons and 6 neutrons, then its mass number is 12. If the nucleus has 6 protons and 7 neutrons, then its mass number is 13.
Explanation:
365,000,000 scientific notation
0.20dm
2. How many grams of salt, NaCl need to be dissolved in 0.50dm of solution to
make a 0.20moldm solution?
Answer:
I don't no sorry. ਕਿਉੁਂਕਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ 478figxigxurRyyv ਸ੍
Chlorine is a highly electronegative atom and yet CCl4 is not polar. Why might this be?
WILL GIVE BRAINLIEST AND 5 STAR+THANKYOU!
Answer:
3.2-2.5 = 0.7 pretty small difference
Explanation:
im his bruda
Is this a compound,mixture or solution? (10 points)
Answer:
it is a compound it is a solution when they say they are ablle to seperate it give out they did not mix it
Explanation:
I'm not sure which category this is. But please help me on this!!
Two piles of heavy boxes must be lifted onto a shelf. Each pile has 20 boxes and each box is the same size and weight. Tom and Claudia are each responsible for a pile. Tom lifts each box straight up from the pile to the shelf. Claudia places a long, gradual ramp that leads from the pile to the shelf. She pushes each box up the ramp until it rests on the shelf.
(Tom used more force.)
Compare the distance each person moved each box. Who moved the boxes a longer distance?
Answer:
Tom
Explanation:
Simply because we see Claudia used a shortcut. Tom uses more physical force than Claudia, since Claudia only had to push the boxes into there required shelves.
The density of zinc is 7.13 g/mL. What would be the volume of a 300.0 g sample of this metal?
Answer:
The answer is 42.08 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass of metal = 300 g
density = 7.13 g/mL
We have
[tex]volume = \frac{300}{7.13} \\ = 42.07573632...[/tex]
We have the final answer as
42.08 mLHope this helps you
a drop of water has a volume of about 0.05 mL. How many molecules of water are in a drop of water?
Answer:
20 drops
Explanation:
What are two things with the same volume but different masses?
Answer:
an ice cube and paper cube with the same dimensions
Explanation:
an example is an ice cube and a cube with the same dimensions made of paper. these have the same volume, but different masses because the particles are packed differently and in different amounts.
What is the term called ¨I nutted
Answer:
it mean i cumed
Explanation:
identify the PowerHouse of a cell
A. Golgi
B. lysosome
C. ribosomes
D. nucleus
E. mitochondrion
F. cytoplasm
G. rough endoplasmic reticulun
H. membrane