Answer:
It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects
What is the molecular polarity of calcium hydroxide
Answer:Calcium hydroxide is a polar compound. 2. Carbonates are insoluble in water unless it is combined with NH4+ or any group 1A ion. It is a colorless crystal or white powder and is produced when quicklime (calcium oxide) is mixed, or slaked with water.Ca(OH)2 is an ionic compound, in which Ca is the cation and OH is the anion. Ca (calcium) has a charge of 2+, since it is in group 2 on the periodic table.
Explanation: hope this helps and have a great night
Please help me I need this really quick
Answer:
Produce CO2 = Both
Produces oxygen = Both
Use CO2 in photosynthesis = Both
Use O2 in cellular respiration = Both
Hope this helps! :)
A hot air ballon will rise in air because:
Answer: C
Explanation:
Hot air is a lot less dense for a few reasons. Hot air essentially means the particles have more kinetic energy, and move around a lot more. Cold air is dense because the particles move a lot less, have less energy, and are closer together.
Answer:
A
Explanation:
Since the balloon itself is heavier than air, it must be filled with a large volume of something much lighter—either hot air or a very light gas, such as helium. Because the combined weight of the balloon and the gas is less than the weight of an equal volume of surrounding air, the balloon rises.
I need 11 12. 13. 14. 15. And 16 please and thank you ❤
Answer:
11.) Radio
12.) Microwave
13.) Infrared
14.) Ultraviolet
15.) X-Ray
16.) Gamma Ray
Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.
Explain the following statement from the text: “Magnets exert magnetic force as a result of magnetic field.
Answer:
All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction.
Magnets exert magnetic force as a result of magnetic field attraction between opposite poles and magnetic field repulsion between same poles.
What are magnets?Magnets are the substance in which north and south poles present and they show attraction towards the different poles and repulsion towards the same pole.
Due to presence of this poles magnets have their own magnetic field and direction of this field governs from north to south pole. Due to this magnetic field magnets exert magnetic force towards some metals like iron and show attraction.
Hence, due to presence of different poles in a magnet, they exerts magnetic force.
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An artificial reef is intended to affect the ocean ecosystem by — А A removing pollution from the water B В providing shelter for marine organisms causing sediment to erode into deeper waters D preventing people from overfishing along the shore
Answer:
B
Explanation:
just answered
An artificial reef is intended to affect the ocean ecosystem by providing shelter and habitat for marine organisms causing sediment to erode into deeper waters. Hence, option C is correct.
What is artificial reef ?An artificial reef is a human-made underwater structure, typically constructed with the purpose of enhancing marine biodiversity, providing habitat for marine organisms, and promoting recreational activities like fishing, diving, and snorkeling.
Artificial reefs can be created from a variety of materials, such as concrete, metal, tires, and sunken ships. The reef structure can also increase the overall biodiversity of an area by creating a new habitat for species that may not have been present before.
Additionally, the presence of an artificial reef can help to reduce pressure on natural reefs by providing an alternative location for fishing and other activities. However, artificial reefs are not typically used as a means of removing pollution from the water or preventing erosion.
Therefore, option C is correct.
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I have these orgo problems for homework and I have no idea where to even begin. We have to find missing reagents and products based on regioselectivity and stereoselectivity. Any help or explanations would be greatly appreciated!!
Answer:
Honestly makes no sense sorry :(
Explanation:
I can try though.. There are three types of selectivity possible for any synthesis: (i) Chemoselectivity is deciding which group reacts. (ii) Regioselectivity is where the reaction takes place in that group. (iii) Stereoselectivity is how the group reacts with respect to the stereochemistry of the product.
A stereospecific mechanism specifies the stereochemical outcome of a given reactant, whereas a stereoselective reaction selects products from those made available by the same, non-specific mechanism acting on a given reactant. Of stereoisomeric reactants, each behaves in its own specific way.
I tried to explain it the best I could.
Hopefully this helps you :)
Feel free to correct me If it was wrong
Balance the following equation. ___MgCI2+ ___ AgNO3-->___Mg(NO3)2
Answer:
MgCI2+ ___ AgNO3-->___Mg(NO3)2
i think u put 2 before NO3
Explanation:
Is salt water considered a mixture or a solution?
Answer: Salt water is a solution because it has these two characteristics: it has the same concentration of each of its parts throughout the solution, and it can be separated by some physical process.
Explanation: Literally learning about this in my science class XD
PLEASE HELP !!!! This is a models of chemistry question
Answer:
The 2.8 hrs one i think???
hope this helps
Explanation:
helllppp i have a test!!!!
A compound has a molar absorptivity of 40.9 cm ^ - 1 * M ^ - 1 at 293 nm. If a 1.00 cm cuvette is used, and the absorbance found to be 0.111, what is the concentration of the sample ?
Answer:
0.00271 M
Explanation:
To solve this problem we can use the formula:
A = ε * C * lWhere A is the absorbance, ε is the molar absorptivity, C is the molar concentration and l is the optical path length.
We input the data given by the problem:
0.111 = 40.9 cm⁻¹M⁻¹ * C * 1.00 cmAnd solve for C:
C = 0.00271 MThe study of chemicals is called chemistry.
The correct answer is 0.00271 M
To solve this problem the formula is used as follows:-
A = ε * C * l
The data is given as follows:-
A is the absorbance,ε is the molar absorptivity, C is the molar concentration l is the optical path length.
[tex]0.111 = 40.9 * C * 1.00[/tex]
After solving the equation the value of C is as follows:-
[tex]C = 0.00271 M[/tex]
Hence, the correct answer is 0.00271.
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How many atoms of oxygen are on the reactants side of this balanced equation?
2AgNO3 (aq)+ Cu(s) —Cu(NO3)2 (aq)+ 2Ag(s)
12
2
3
6
Answer:
Explanation:
I tried to figure it out but my head wasn’t working sorry
5 What does 2Na2O mean?
Answer:
2 Na2O means two molecules of Sodium oxide.
mark me please
Body Color is a ___________
Variation
Trait
Feature
Observation
Hello,
After doing the Knewton assignments and watching some videos. I really do not understand some basics concepts of Energy. One of the questions is asking: Which of the following objects has more kinetic energy than does potential energy?
a) a compressed spring in a pinball machine just before the ball is launched.
b)a rollercoaster motionless at the top of the track.
c) a yo-yo before it is released
d)the pendulum of a grandfather clock at the lowest point of its arc of motion.
I thought that the answer was b, but the correct answer was c). I did not understand the explanation. It says " Kinetic energy is the energy of motion. Each of the objects above are motionless—with stored potential energy—except for the clock. At the bottom of its arc it will have the greatest kinetic energy, which is then converted to potential energy as it swings back up to one side"
So if someone could explain this better I would so good.
Which of the following is not a type of thematic map? Help please
Answer:
Option c is the answer....
what is 1.01 km to mm in scientific notation
Answer:
= 3.456 × 1011
Explanation:
Newton's Law of Gravity says that any the effect of gravity between two objects depends on what two factors?
Answer:
Explanation:
you sack
What will be the volume occupied by 100 grams of oxygen gas
at STP?
Answer:70L
Explanation:
The volume occupied by 100g of oxygen gas at STP is 70L.
1 mole of a gas at STP occupies 22.4 L volume.
The same goes for oxygen gas, [tex]O_2[/tex]. 1 mole of [tex]O_2[/tex] occupies 22.4L volume.
Now the molar mass of [tex]O_2[/tex] is = 32g
So the number of moles of [tex]O_2[/tex] in 100g is
n = 100/32
n = 3.125 moles
Volume occupied by 3.125 moles or 100g of [tex]O_2[/tex] is
V = 3.125 × 22.4 L
V = 70 L volume is occupied by 100g of oxygen gas.
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An object has a mass of 15.2 g and a volume of 8.9 mL.
What is the density of the object?
Answer:
recordando también que ** 1mL = 1cm ^ 3 **
(como ** 1 dm ^ 3 = 1 L **)
1 This animal has a backbone, nurses its offspring: likes to gnaw, has a bushy tail: climbs trees; has reddish fur on its
back and has white fur on its belly.
Answer: American red squirrel
Explanation:
The American red squirrel is the smallest squirrel. The color of the fur may vary from season to season. The color of the squirrel can also vary depending of the environment in which it lives. In summer the black stripe appears on the sides over the white fur. It has a backbone and like other mammals nurses the offsprings. It has a bushy tail. It is a native of North America. Red fur appear on the back and white on the belly. Strong claws, strong muscles, and compact body are other key features of the squirrel.
Pls help I’ll mark brainliest pls pls pls
Answer:
the tea was not hot sugar dissolves quickly and hot water than cold
What is the density of a brick with a mass of 150gm and the sides are 2cm long 5cm high and
5cm wide?
Weathering, erosion, and deposition by water, wind, and ice are interactions between
which two of Earth's systems?
which of the following is not found in the tropical rainforest?
a.ilang - ilang b. wild pigs c.ferns d. shark
Answer:
B. Wild Pigs!!!!!!!!
Help me please 18-22
Answer:
-4
Explanation:
Balance each of the following equations by placing coefficients in front of the formulas as needed MgO(s) Mg(s) + 02(8) ZnCI.(ag)
Is the equation wrong. Such a equation cannot be formed. pls enter the write equation i will help you
14) Propane, C3H8, is a hydrocarbon that is commonly used as fuel for cooking.
a) Write a balanced equation for the complete combustion of propane gas, which yields CO2(g) and
H2O(l).
b) If 10.0 g of propane undergo combustion, how many moles of oxygen will be consumed?
c) Assuming that air is 21.0 percent O2 by volume, calculate the volume of air needed to completely
combust 10.0 g of propane at 30oC and 1 atm
d) If the combustion of propane produces 2220 kJ/mole, how much energy is produced when 30.0 g
of propane undergoes complete combustion?
e) If the process described in d) above occurs in a calorimeter containing 8.25 kg of water, calculate
the change in temperature of the water that would be observed.
How many grams of propane, C3H8, are needed to make 140 grams of water?
Answer:
85.6 g
Explanation:
Step 1: Write the balanced combustion equation
C₃H₈ + 5 O₂ ⇒ 3 CO₂ + 4 H₂O
Step 2: Calculate the moles corresponding to 140 g of H₂O
The molar mass of H₂O is 18.02 g/mol.
140 g × 1 mol/18.02 g = 7.77 mol
Step 3: Calculate the moles of C₃H₈ needed to produce 7.77 moles of H₂O
The molar ratio of C₃H₈ to H₂O is 1:4. The moles of C₃H₈ needed are 1/4 × 7.77 mol = 1.94 mol.
Step 4: Calculate the mass corresponding to 1.94 moles of C₃H₈
The molar mass of C₃H₈ is 44.10 g/mol.
1.94 mol × 44.10 g/mol = 85.6 g
(a) calculate the %ic of the interatomic bond for the intermetallic compound tial3. (b) on the basis of this result, what type of interatomic bonding would you expect to be found in tial3?
Answer:
See explanation
Explanation:
We know that
%ic of the interatomic bond = [1 - e^-(XA - XB)^2/4] * 100%
Now;
XA = electronegativity of Ti = 1.61
XB = electronegativity of Al = 1.54
Substituting values;
%ic of the interatomic bond = [1 - e^-(1.61 - 1.54)^2/4] * 100%
%ic of the interatomic bond = 0.12%
Given the low %ic of the interatomic bond, the bond is metallic.
The percent ionic character is 0% and the type of interatomic bonding would be metallic.
The percent ionic character can be determined by using the formula,
[tex]1-exp{-0.25(Xa-Xb)^{2} ][/tex]
• In the given equation, Xa and Xb refers to the electronegativities of the elements.
• The intermetallic compound given is TiAl₃.
• Based on the electronegativity table, the electronegativity of Al or Xa is 1.5 and the electronegativity of Ti or Xb is 1.5.
Now putting the values in the above formula we get the % ionic character,
[tex]= 1-exp [-0.25 (Xa -Xb)^{2}]*100%\\\\\\=1-exp [-0.25 (1.5 -1.5)^{2}]*100%\\[/tex]
[tex]= 0 percent[/tex]
Thus, the ionic bond character is 0% and the compound TiAl₃ comprises two metals, it exhibits metallic bonding.
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