El acero esta compuesto por Hierro y Carbono
Which statement about Niels Bohr's atomic model is true?
O Higher orbits have lower energies.
Each orbit has a specific energy level.
Electrons can exist in any energy level.
O Orbits close to the nucleus have no energy.
Hurry.
Answer:
o
Explanation:
Answer:
Each orbit has a specific energy level.
Explanation:
Bohr model
as insoluble ...... can be separated from a liquid by filtration on centrifugation
Answer:
by centrifugation
Explanation:
in such cases filtration cannot be used for separation
PLS HELP ASAP I WILL GIVE BRAINLYY
A tree is an example of an object that contains chemical energy
True or false
please help
Answer:
false
Explanation:
Does anyone know how to do this?
Answer
find out the number of moles and use the molar ratio (numbers in front of formulas (in this case they are all 1) to determine how many moles of each product you are going to get theoretically
n=m/M is the equation to use to get moles here
30.8 gm/32.04 g/mol=0.9612 moles of the methanol and also of the formaldehyde so
0.9612 moles of the formaldehyde x molar mass (M) 30.73 g/mol= 29.54 gm which is the theoretical yield you already have the actual yield of 24.7 gm
then divide the actual by the theoretical to get the % yield which is 83.6%
Explanation:
HELP ASAP PLEASE
Place the correct figure to represent the reaction below. (Remember that energy is rising on the vertical (y) axis and the reaction progress is on the horizontal (x) axis.)
C12H22O11 + 11 H2SO4 12 C + 11 H2SO4 + 11 H2O
Answer:
It is the bottom left one
Explanation:
Just did it in OW
If 0.05 mol of I2 were actually produced in a reaction starting with 15 grams of CO what is the percent yield of I2
Answer:
6.2
Explanation:
I AM SMOooOooOooORTno but really trust the processSubstances, such as litmus paper or red cabbage juice, that turn color based on the pH of the solution are called ___.
solutes
solutions
indicators
solvents
Answer:
soluteswws
Explanation:
in which group in the periodic table do we not find metal A.Group 1 B.Group 2 C.Group 3 D.Group 5
Answer:
Group 5
Explanation:
Using method of elimination:
A. Group 1
Also known as the Alkali metals group. It contains metals such as lithium and sodium. This option is incorrect.
B. Group 2
Also known as the Alkali Earth metals group. It contains metals such as Magnesium and calcium. This option is incorrect.
C. Group 3
It contains metals such as Aluminium and scandium. This option is incorrect.
D. Group 5
This is the correct option. The elements in these group are non metals. Examples include Nitrogen.
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Grade 8 Science Winter Interim
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Question 3
Twoiron balls are dropped from a height of 100 meters One Dal Frame A) is not moving when it is dropped and the second ball is moving horizontally at a constant velocity of 10 m/s when it is dropped (Frame B). The balls follow the
trajectories indicated by the arrows and fall for 4,52 s before hitting the ground. (Ignore air resistance)
Frame A
Frame B
1kg
-10%
10kg
True or False: The amount of water has and will always remain about the same?
Answer:
In the world? I would say no, but at the same time there are a lot of variables to consider in this. But I'd say no. Just my opinion.
Explanation
Answer:
False the amount of water on earth has decreased over the years
Explanation:
Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope? Match each label to the correct cell part. Question 5 options: Golgi Apparatus Nucleus Endoplasmic Reticulum Mitochodrion Ribosome Lysosome
1.
2.
3.
4.
5.
6.
Answer:
Hello I saw you guys were having trouble please put me as the brainiest
Explanation:
1. Golgi Apparatus
2. Nucleus
3. Endoplasmic Reticulum
4. Mitochondrion
5. Ribosome
6. Lysosome
The process of water changing from a liquid to solid is called?
Answer:
freezing
Explanation:
When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt. ... The reverse of the melting process is called freezing. Liquid water freezes and becomes solid ice when the molecules lose energy.
hope it becomes helpful to you ☺️☺️
good luck
Suppose you a 2 of 10M solution and poured 4 liters of water into it. What would be the new concentration of the solution?
Explanation:
tgfghhuigyhjgguigutyjiouuluuirtugyirechjgAnswer:
3.33M
Explanation:
M1V1=M2V2
M1 = 10M
V1=2L
V2=6L
M2 = M1V1/V2 = 10x 2/6 = 3.33 M
hlo ;) lol im banned and my name is kimboslicer it is so sad my accout is bloked 4 23:12
Answer:
lol im sorry man
Explanation:
Answer:
My old acc got banned
Explanation:
A weight of 8.7 N is attached to a spring that has a spring constant of 190 N/m. How much will the spring stretch?
Given values are:
Force, Fs = 8.7 NSpring constant, k = 190 N/mAs we know the relation,
→ [tex]Fs = K\times x[/tex]
or,
→ [tex]x = \frac{Fs}{k}[/tex]
By putting the values, we get
[tex]= \frac{8.7}{190}[/tex]
[tex]= 4.6\times 10^{-2} \ m[/tex]
Thus the response above is right.
Learn more about spring constant here:
https://brainly.com/question/15404289
how many molecules are present in a sample of carbon dioxide, CO2 with a mass of 168.2g?
Answer:
2.3 X 10^24 atoms CO2
Explanation:
Answer:
2.30 x10²⁴ molecules CO2
Explanation:
Convert mass of CO2 to moles
Convert moles of CO2 to molecules using Avogadro's number.
168.2 g CO2 x 1 mole CO2 / 44 g CO2 x 6.022 x10²³ molecules CO2 / 1 mole CO2
= 2.30 x10²⁴ molecules CO2
What is the difference between cleavage and fracture
if carbon dioxide is broken down. what element will it give?
help plsssssssssssssssssssssss
Answer:
b chemical - thermal and mechanical
Explanation:
energy stored in food in is chemical, so it would only make sense of b) was the answer
High-speed winds transfer more energy to the ocean’s surface, creating bigger waves.
Question 10 options:
True
False
Answer:
I think that would be true. The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves. Therefore, a wave's size depends on wind speed, wind duration, and the area over which the wind is blowing
Answer: True.
Explanation: Yes, waves get energy from the wind through friction, so you see those waves get bigger each time. The longer the winds blows, the more friction, and energy it's getting, meaning better, and deadly waves. The wind can sometimes cause tsunamis if the its blowing too hard.
Which has the larger change hydration in each pair of a)Na+ Or cs+ b)Sr+2 or Rb+ c)Na+ or Cl- d) O-2 or F- e)OH- or SH-
Answer:
See explanation
Explanation:
The size of the hydration enthalpy of a system depends on the attraction between the ions and the water molecules. Stronger attractions exist between water and smaller ions. The smaller the ion, the higher the hydration enthalpy is.
In the first pair, Na+ is smaller than Cs+ hence Na+ has a larger change in hydration enthalpy.
In the second pair, Sr2+ is smaller than Rb+ hence Sr2+ has a larger change in hydration enthalpy.
In the third pair, Na+ is smaller than Cl- hence Na+ has a larger change in hydration energy.
F- is smaller than O2- hence F- has a larger change in hydration energy.
OH- is smaller than the SH- hence the OH- has a larger change in hydration energy.
True or false: All molecules or atoms in a substance have the same amount of kinetic energy at a given temperature?
Answer:
false
Explanation:
Difference in neutrons in a molecule means that molecules have different masses. They will always have different energies
another example: water has less energy as a liquid than as a gas
I’ll really appreciate it if you help me on this one .
Answer:
Beautiful, scary, a different experience, full of imaginations.
Fish can be killed by a sudden increase in water
A. Temperature
B. Level
C. Density
D. Color
Answer:
i think it is A
Explanation:
Answer:
Explanation:
A. Most definitly Temperature!
true or false plz help
Answer:
True
animals can only reproduce sexually
Explanation:
Answer:
It's true, I said true the other time but someone already answered so that's why i couldn't answer right now
Explanation:
calculate the molarity of the solution in a flask that contains 2.50 moles of potassium sulfate in 125 mL of solution
Answer:
0.02 M
Explanation:
Molarity = moles/volume (L)
125 mL =0.125L
M = 2.5/0.125 = 0.02 M
what gives off greenhouse gases
Answer:
the combustion of fossil fuels, such as coal, oil, and natural gas, to produce electricity.
What is the mass of chlorine in 3.9 x 1019 molecules of Cl2?
Explanation:
A photon is a quantum of EM radiation. Its energy is given by E = hf and is related to the frequency f and wavelength λ of the radiation by
E=hf=hcλ(energy of a photon)E=hf=hcλ(energy of a photon),
where E is the energy of a single photon and c is the speed of light. When working with small systems, energy in eV is often useful. Note that Planck’s constant in these units is h = 4.14 × 10−15 eV · s.
Since many wavelengths are stated in nanometers (nm), it is also useful to know that hc = 1240 eV · nm.
These will make many calculations a little easier.
All EM radiation is composed of photons. Figure 1 shows various divisions of the EM spectrum plotted against wavelength, frequency, and photon energy. Previously in this book, photon characteristics were alluded to in the discussion of some of the characteristics of UV, x rays, and γ rays, the first of which start with frequencies just above violet in the visible spectrum. It was noted that these types of EM radiation have characteristics much different than visible light. We can now see that such properties arise because photon energy is larger at high frequencies.
Glucose is produced through the process of photosynthesis
and is shown below. How many atoms of hydrogen are
present in one molecule of glucose?
6
3
12
24
As shown in the picture, the chemical formula for glucose is C6H12O6. This means that there are 6 carbons, 12 hydrogens and 6 oxygens in one molecule of glucose.
Your Answer: 12