Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, stealth technology works (in two major ways) by using coating materials other than the normal coating materials or by changing the shape of the aircraft.
Normally, the coating material of the aircraft are always produced in a way that they can be able to reflect antenna signals back to radar antenna. However, with stealth technology, other coating materials have been developed that absorbs the radar energy instead of reflecting it. Also, conventional aircrafts have a rounded shape which makes the body easily reflect some radar signals back to the radar antenna but stealth aircrafts have a flat surfaces and pointed edges instead; this enables the aircraft to reflect radar signals away from the radar antenna.
The nuclear symbol for uranium-235 should be written as
O U-235.
225
92 U
233
143U
OU
Answer:
²³⁵₉₂U
Explanation:
²³⁵₉₂U
The nuclear symbol of U- 235 should be written as;
235 is the mass number of uranium. The mass number is written as the superscript before the symbol of the element.
92 is the atomic number of uranium. It is written as the subscript before the symbol of the element.
If more solute can be dissolved in a solvent, the solution is
Answer:
A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved. At 20°C, the maximum amount of NaCl that will dissolve in 100. g of water is 36.0 g.
Answer: unsaturated solution.
A scientist studying stars can estimate the temperatures of stars by their?
What happens if you try to move the atoms very close together?
Answer:
When you try to move the atoms two close, their positive nuclei repel each other. 2. A covalent bond is an electric force of attraction between two atoms that share outer electrons. ... The protons in each nucleus are repelling each other strongly, it takes more energy to move the atoms closer together at this point.
Explanation:
how many moles are in 174g of NaCL?
FISH BOWL REAL IT IN ITZ ME AND MY FREIND GO BUDD WORK WORK. LOLLLLLL
Answer:
58.44277 grams
Explanation:
Im in middle school and I know this! LOL
PLEASE HELP ME!!
Identify which is the true statement about polar and nonpolar molecules. Explain why.
A. polar molecules always have nonpolar bonds.
B. Non polar molecules always have polar bonds.
C. Nonpolar molecules can have polar bonds.
D. Polar molecules never have polar bonds.
In a lab investigation, one group of students (group A) measures the speed of a 0.1 kg toy car to be 2.5
m/s at the bottom of a ramp. Another group of students (group B) measures the speed of the car to be 3 m/s at the bottom of the ramp. The car's starting position at the top of the ramp is 1 m high. Calculate the kinetic energy of the car for group A
Answer:0.98 J
Explanation:
PE=mpg
PE=0.1x9.8x1
PE=0.98J
42/19K ——->0/-1e+a/bC
Answer:
?
Explanation:
8. Well-aerated soils have the _______________ smell of good soil.
9. Loam soil contains 10 to 20 percent _______________ , 40 percent _______________ and 40 percent _______________ .
Answer:
9 is clay, silt, sand in that order
Explanation:
Loam soil contains 10 to 20 percent clay, 40 percent silt and 40 percent sand. Less than 50% of the soil is made up of minerals; the remainder is made up of organic matter and void space.
What is Loam soil?Clay, sand, plus silt are the three minerals that make up loam soil. Loam is the best soil for growing plants when mixed in the appropriate amounts. Less than 50% of the soil is made up of minerals; the remainder is made up of organic matter and void space.
In loam soil, little will grow without the latter two. The ideal combination of clay, sand, plus silt will provide the void where minerals, organic materials, water, and air may support life. Loam soil contains 10 to 20 percent clay, 40 percent silt and 40 percent sand. Basalt transforms into clay-like soil, whereas granite decomposes into silty sands.
Therefore, loam soil contains 10 to 20 percent clay, 40 percent silt and 40 percent sand.
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Complete the sentence. The lower the hydrogen ion concentration, the ______ the pH. higher lower closer to 7 closer to 0
Answer:
the higher the pH
Explanation:
Answer:
Hes right i took the quiz
Explanation:
Describe how the location along a specific latitude on Earth relates to the average high temperature. Explain your reasoning...?
Here is the actual question from before, I forgot to put the question in 0-0
Answer:
Evaluate \dfrac {9}m+4
m
9
+4start fraction, 9, divided by, m, end fraction, plus, 4 when m=3m=3m, equals, 3.
Explanation:
7. This part of the brain controls memory, and long term abuse of marijuana can permanently
damage it.
(5 Points)
Frontal Lobe
Cerebellum
Hippocampus
Amygdala
Answer:
Hippocampus
Explanation:
The main parts of the brain involved with memory are the amygdala, the hippocampus, the cerebellum, and the prefrontal cortex.
Memory impairment from marijuana use occurs because THC alters how the hippocampus, a brain area responsible for memory formation, processes information.
Can someone help me plz :/
I think its the
2nd one
How many atoms of oxygen (O) are represented in the chemical formula shown below?
2 CO2
1 atom of oxygen
2 atoms of oxygen
6 atoms of oxygen
4 atoms of oxygen
Answer:
4 atoms of oxygen
Explanation:
2 atoms of oxygen gas O2
Answer:
4 atoms of oxygen
Explanation:
The given chemical formula is:
2CO₂
Unknown is the number of atoms;
There are :
C : 2 atoms of carbon
O: (2 x 2) atoms of oxygen in the given molecule
4 atoms of oxygen
C.
If 150 grams of oxygen are produced, how many moles of sodium chlorate decomposed
Answer:
3.13 moles of sodium chlorate are decomposed.
Explanation:
Given data:
Mass of oxygen produced = 150 g
Number of moles of sodium chlorate decomposed = ?
Solution:
Chemical equation:
2NaClO₃ → 2NaCl + 3O₂
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 150 g/ 32 g/mol
Number of moles = 4.7 mol
Now we will compare the moles of oxygen with sodium chlorate.
O₂ : NaClO₃
3 : 2
4.7 : 2/3×4.7 = 3.13 mol
3.13 moles of sodium chlorate are decomposed.
The net force on a vehicle that is accelerating at a rate of 1.15 m/s2
is 1,800 N.
What is the mass of the vehicle?
Answer:
1565.2 kgExplanation:
The mass of the vehicle can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]a = \frac{1800}{1.15} \\ = 1565.217...[/tex]
We have the final answer as
1565.2 kgHope this helps you
The equilibrium constant, Kc, for the reaction H2 (g) + 2 (g) 2H (g) is 54 at 425 ºC. If the equilibrium mixture contains 0.030 M H and 0.015 M 2 , the equilibrium concentration of H2 is______.
Answer:
[H₂] = 0.0011M
Explanation:
Based on the chemical equation:
H₂(g) + I₂(g) ⇄ 2HI(g)
And Kc is defined as:
Kc = [HI]² / [H₂] [I₂]
Where Kc = 54
And [] represents equilibrium concentration of each compund.
Replacing:
54 = [0.030M]² / [H₂] [0.015]
[H₂] = [0.030M]² / 54* [0.015]
[H₂] = 0.0011M
10. A water molecule is made up of one oxygen atom and two hydrogen atoms. Why is water
considered a
pure
substance?
1 point
M
A. Water can be broken down by physical means.
B. Water can be combined with other substances by physical means.
C. Each water molecule is identical.
D. Water molecules are made up of different types of atoms
Chemical reactions happen when
Answer:
Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products
Explanation:
Explain where you would find the three different types of muscles (cardiac, smooth and skeletal) and how these different types of muscles are used in the body.
Explanation: Skeletal muscle, attached to bones, is responsible for skeletal movements. The peripheral portion of the central nervous system (CNS) controls the skeletal muscles. Thus, these muscles are under conscious, or voluntary, control. The basic unit is the muscle fiber with many nuclei. These muscle fibers are striated (having transverse streaks) and each acts independently of neighboring muscle fibers.
What is the difference in the molecular formula of 2 successive members of the homologous series of a carbon additive?
What is the relationship between the electronic configuration, group and period numbers?
Can someone please answer this.
Answer: the number of circles in the electronic configuration of an element is represented in the periodic table as the period number that element is situated in. the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in.
Explanation: hope it helps :)
( i need help on this one )
The following statement is an example of Newton's Second Law“ that it is much easier to carry your backpack when it is empty rather than when it’s full of textbooks”.
True
False
The following statement is an example of Newton's Third Law“When you are standing in a subway train and the train suddenly stops but your body continues to move forward”
True
False
Answer:
1. False
2.True
Explanation:
What are 4 signs that chemical reaction had occurred?
Answer:
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (bubbles)
Precipitate (formation of a solid)
There are 5 so you can choose 4.
The four signs that a chemical reaction has occurred are as follows:
Change in color.Alteration in temperature.Change in the state along with precipitation.The evolution of gas in form of bubbles. What is a Chemical reaction?A chemical reaction may be defined as a process that significantly involves the chemical transformation of one set of chemical substances to another. This process involves the utilization of substances known as reactants that are transformed into other substances known as products.
Every chemical reaction involves the four signs which are mentioned above. These signs are delivered by chemical reactions along with determined products. But the mass of the reactants and products always remains the same. Precipitation is only visualized in specific reactions with the possessions of certain characteristics.
Therefore, the four signs that a chemical reaction has occurred are well-mentioned above.
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How many bonds are there in the molecule Br2
Answer:
covalent bonds please mark me brainliest
Based on the image below, what is the atmospheric pressure?
1) 0.5 atm
2) 1 atm
3) 1.5 atm
4) 2 atm
5) it is impossible to tell
Answer:
1 atm
Explanation:
Given:
Atmospheric pressure = 760 torr
Find:
Atmospheric pressure in atm
Computation:
We know that ;
1 torr = 0.00131579atm
So,
760 torr = 760 x 0.00131579atm
760 torr = 1 atm (Approx)
Atmospheric pressure in atm = 1 atm
The diagram below has an atmospheric pressure of 760 torr. The
atmospheric pressure will be 1 atm.
This is calculated by converting Torr to atm which are both units of pressure.
The standard conversion formula is
1 torr = 0.00131579atm.
This means that
760 torr = 760 x 0.00131579atm
760 torr = 1 atm
Atmospheric pressure in atm is therefore 1 atm.
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is there sodium in C2H6
Answer:
No
Explanation:
C is carbon and H is hydrogen
Answer:
There is not sodium (Na) in C2H6.
Sodium on the periodic table is Na and if present in a molecule would be shown in the chemical formula i.e. NaOH or NaCl. C2H6 is an ethane with a two carbon chain.
Heat passes from__________ to ________________
Answer:
How does heat move?
Heat moves in three ways: Radiation, conduction, and convection.
Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. This is how the heat from the Sun gets to Earth. In fact, all hot things radiate heat to cooler things. When the heat waves hits the cooler thing, they make the molecules of the cooler object speed up. When the molecules of that object speed up, the object becomes hotter.
Explanation:
Create a one-sentence summary that explains why hydrogen gas does react easily and spontaneously
due in 20 minutes help
Answer: Hydrogen belongs to group 1 metal elements in the periodic table.
Explanation:
The hydrogen is a highly active metal. It has a single electron in its valence shell and it can donate its electron to other metal atoms. Thus forming metal hydrides. The hydrogen when ignited it reacts with oxygen and burns explosively this is indicative of high reactivity and spontaneous reactivity of hydrogen atom.
