Answer:
calcium supplements
Explanation:
Which element, If combined with lodine, will have the greatest attraction for the lodine electrons?
C
P
B
HELP ME PLZ IT WILL MEAN A LOT
Answer:
1. B
2.C
Explanation:
I just used logic, it's been a while since I've done this but right now I'm in Honors Chemistry and I think I have the qualifications to answer this question. Sorry if I'm wrong.
During ____, the chromatin condenses to make ____.
prophase, chromosomes
metaphase, chromosomes
prophase, DNA
metaphase, DNA
Most of the carbon in the rocks that form Earth's mantle and crust was stored there when Earth formed. The rest of Earth's carbon is stored and exchanged in many ways.In a model of the carbon cycle, which process does NOT contribute directly to the storage of carbon within sediment?
Answer:
Photosynthesis.
Explanation:
In photosynthesis process, carbondioxide gas enters into plant leaves from which plant produces organic molecules such as glucose. This glucose helps the plant to increase it growth and complete development stages and finally the plant dies and buried in the soil so due to decomposition process, the carbon present in the plant body releases in the soil and become part of sediments. So indirectly photosynthesis process provides carbon to the soil.
Find the number of moles if you have 1.2 x 1048 copper atoms.
Answer:
1.993 × 10^(24) moles
Explanation:
From avogadro's number, we have that;
1 mole of atoms contain 6.022 × 10^(23) atoms
Therefore, 1.2 x 10^(48) atoms of copper will contain;
(1.2 x 10^(48) × 1)/(6.022 × 10^(23)) = 1.993 × 10^(24) moles
I'm very confused please help
Answer:
the food chain you mean
Explanation:
pollution than mosquitoes then alligators
help will make brainliest! :)
Answer:
im not sure, but i believe its T. the dew point is 76.
All of the following rivers are labeled on the map above except the __________ River.
A. Danube
B. Volga
C. Lena
D. Ob
What is an example of an initiation phase for an addition
polymerization reaction?
SELECT AN ANSWER
H-O* + CH3-CH3 ----> H-O-CH2-CH2*
H-O* + CH3-CH3 ----> H-O-CH2-CH2-O-H
H-O* + CH2=CH * ----> CH3CH2*
H-O* + CH2=CH2 ----> H-O-CH2-CH2*
Answer:
H-O* + CH3-CH3 ----> H-O-CH2-CH2*
H-O* + CH[tex]_3[/tex]-CH[tex]_3[/tex] → H-O-CH[tex]_2[/tex]-CH[tex]_2[/tex]* is an example of an initiation phase for an addition polymerization reaction. Therefore, the correct option is option A.
What is polymerization reaction?High-molecular-weight compounds known as polymers are created by the aggregation of several smaller molecules known as monomers. Polymers make up the natural and manmade fibres used in clothes as well as the polymers that have revolutionised society.
Two fundamental methods for creating polymers exist: (a) joining small molecules together by an addition reaction, and (b) joining molecules while getting rid of a stable small molecule like water. Condensation processes, which combine addition and elimination reactions, are what this later type of polymerization is known as. H-O* + CH[tex]_3[/tex]-CH[tex]_3[/tex] → H-O-CH[tex]_2[/tex]-CH[tex]_2[/tex]* is an example of an initiation phase for an addition polymerization reaction.
Therefore, the correct option is option A.
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Calculate the number of atoms in 3.21 mole of Mg?
Answer:
1.93 × 10²⁴ atomsExplanation:
The number of atoms in a substance can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 3.21 × 6.02 × 10²³
We have the final answer as
1.93 × 10²⁴ atomsHope this helps you
The burning of a sample of propane generated 1 04.6 kJ of heat. All of this heat was used to heat 500.0 g of water that had an initial temperature of 20.0/C. What was the final temperature of the water?
Answer: 70.0°C
Explanation:
Quantity of heat = Mass * Specific heat * Change in temperature
Quantity of heat = 104.6 KJ
Mass = 500.0 g
Specific heat of water is 4.18 J/g°C
Change in temperature assuming final temperature is x = x - 20
Units should be in grams and joules:
104,600 = 500 * 4.18 * (x - 20)
104,600 = 2,090 * (x - 20)
x - 20 = 104,600/2,090
x = 104,600/2,090 + 20
x = 69.8
= 70.0°C
Josie draws models of the particles within a substance. Which model best represents the particles in
a solid?
D
A
B
C
HELP!!
Which one is balanced?
WILL GIVE BRAINLEST!!!!
Answer:
B
Explanation:
I believe c is the answer but maybe wrong though
PLEASE HELP! SEE ATTACHED!
Answer:
Ans => C => 43.3%
Explanation:
2CO + O₂ => 2CO₂
Given 1g CO = 1g/28g·mol⁻¹ = 0.036 mol CO
b/c coefficient of CO = coefficient of CO₂ => moles CO₂ = 0.036 mol = 0.036mol x 44g/mol = 1.57 gCO₂ (theoretical yield)
%Yield = (actual yield/theoretical yield) x 100% = (0.68g/1.57g) x 100% = 43.3%
hi...need help....thank you..
Answer:
36 oxygen atoms
Explanation:
From the question given above, the following data were obtained:
Compound => 4Al₂(CO₃)₃
Number of Oxygen atom in the compound =?
The number of oxygen atom in the above compound can be obtained as follow:
4Al₂(CO₃)₃
Al = 4 × 2 = 8 atoms
C = 4 × 3 × 1 = 12 atoms
O = 4 × 3 × 3 = 36 atoms
From the simple illustration made above, there are 36 oxygen atoms in the compound.
30 POINTS!! ILL MAKE BRAINLIEST!!
Thanks! also that's a lot use a calculator.!
Which is the balanced version of the half-reaction below?
Answer:
The answer is B
Explanation:
Because H2S →S + 2Hpluswhat is convection,radiation,conduction?
Answer:
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission.
Hello! Does anyone know how the structural formula of 2, 2 dimethyl butane is? Please help!
Answer:
I have it.
Explanation:
Which circuit hook-up design will have the brightest light bulb?A - 1 battery 1 bulb, B - 2 batteries 1 bulb, C - 3 batteries one bulb, D 2 batteries the bulb is on the other end, E 1 battery and 1 bulb on the other end
Question 5 options:
A
B
C
D
E
Heres another for you guys!
Answer:
I believe it is E because the battery has a wire, a power source(the battery), and a bulb connected together thus making a full series circuit. Furthermore, the more batteries they are to a series circuit, the more dimmer the light bulbs will be.
1.What element is located at period 3, group 13?
2.Element at group 4, period 5?
Convert 4.5 x 10-3 to standard Notation
Posted today at 6:30 am
1
=
Answer:
0.0045
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example 4.5×10⁻³
In standard notation
4.5 / 10³
0.0045
The expanded notation is standard notation of writing the numerical values which is normal way. The numbers are written as they are, without the power of 10.
6
Which subatomic particle can be found revolving around the nucleus?
proton
neutron
electron
Answer : The correct option is, electron.
Explanation :
As we know that,
An atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.
The protons and the neutrons are located inside the nucleus or the center of the nucleus where the mass of the an atom is concentrated.
The electrons are located around the nucleus.
The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.
According to the question, the electron subatomic particle found revolving around the nucleus.
Hence, the correct option is electron.
Identify the chemical reaction Below:
Ca(OH)2 + HCI CaCl2 + H20
Answer:
Neutralizaion reaction!
Explanation:
Calciumhydroxide under Hydrochloric acid gives Calciumchloride with the formation of water.
What kind of energy can be transferred?
Help quick please.
Answer:
Any kind, as long as there is an action.
Answer:
Energy can be transferred from one form to another like kinetic energy to potential energy, light energy to heat energy, kinetic energy to electrical energy, light energy to chemical energy .etc ...
Explanation:
brainest please
what percent of the sun's energy is used by the living organism on earth
a. 1%
b. 10%
c. 20%
d. 35%
e. 50%
Answer:
1% A
Explanation:
2) A sample of argon has a volume of 5.0 Land the pressure is 650 mm Hg If the final temperature is
30. C, the final volume is 5.7 L, and the final pressure is 800. mm Hg, what was the initial temperature
of the argon?
Answer:
[tex]T_1 = -57.15^{\circ}C[/tex]
Explanation:
Given
[tex]P_1 = 650mmHg[/tex] --- Initial Pressure
[tex]V_1 = 5.0L[/tex] --- Initial Volume
[tex]V_2 = 5.7L[/tex] --- Final Volume
[tex]P_2 = 800mmHg[/tex] --- Final Pressure
[tex]T_2 = 30C[/tex] ---- Final Temperature
Required
Determine the initial temperature (T1)
This question will be solved using combined gas law which states:
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
However, the final temperature must be converted to degree kelvin
[tex]T_2 = 30C[/tex] --- Add 273.15
[tex]T_2 = 30k + 273.15 k[/tex]
[tex]T_2 = 303.15k[/tex]
Make T1 the subject in [tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
[tex]T_1 = \frac{P_1V_1T_2}{P_2V_2}[/tex]
Substitute values for P1, V1, T2, P2 and V2
[tex]T_1 = \frac{650 * 5.0 * 303.15}{800 * 5.7}[/tex]
[tex]T_1 = \frac{985237.5}{4560}[/tex]
[tex]T_1 = 216.060855263[/tex]
Approximate
[tex]T_1 = 216k[/tex]
Convert to degree Celsius
[tex]T_1 = 216k[/tex] --- Subtract 273.15
[tex]T_1 = 216 - 273.15[/tex]
[tex]T_1 = -57.15^{\circ}C[/tex]
Hence, the initial temperature is -57.15C
what are some similarities between polar and nonpolar molecules
Answer:
Explanation:
Polar bonds also often contribute to a net dipole moment of a molecule. This basically means that there are partial charges that make a molecule overall polar. One example might be water: in H20, oxygen is very electronegative, and hydrogen is less so. This means that oxygen is more negative and hydrogen is more positive. This is why water is cohesive (can stick together): The positive ends stick to the negative ends.
To solve this we must be knowing each and every concept related to polar molecule. Therefore, polar and nonpolar molecules are covalent compound.
What is polar molecule?A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms.
The term "polarity" refers to how unlike two molecules' electrical poles are from one another. If they are quite dissimilar, the species is said to be an extremely polar molecule.
Because of the more symmetrical distribution of the electrons, non-polar molecules do not have a lot of charges on their opposing sides. The fees are all offset by one another. Polar and nonpolar molecules are covalent compound.
Therefore, polar and nonpolar molecules are covalent compound.
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Explain how the need for energy is the driving force of the oxygen cycle.
Yet again earth science
Answer:
Engery is the driving force of the oxygen cycle is photosynthesis itself, which is responsible for the creation and maintenance of earth's atmosphere.Plants are able to use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen.
Answer:
Energy is the main force of the oxygen cycle and not to mention also photosynthesis, which is responsible for the creation of the earth's atmosphere. This would also mean that plants are the main focus of the Oxygen cycle and energy is needed to make plants. So without energy, no plants would exist! Not to mention the oxygen cycle wouldn't work without energy. Plants are also able to use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen.
Hope this helps! :)
Explanation:
When you drop things into bodies of water, some things sink and some things float. What determines this?
Answer: how dense the object is and if it has air in it.
Explanation:
Answer:
Density determines the situation.
The denser the body than water, it sinks in water
The less dense the body than water, it floats on water.