Answer:
A
Explanation:
it is A because all of the other ones are opinions.
Answer:
A
Explanation:
The original list from the Stockholm Convention on Persistent Organic Pollutants (POPs) of 12 hazardous chemicals, called the ____________________, which includes DDT and eight other chlorine-containing persistent pesticides, PCBs, dioxins, and furans.
Answer:
The dirty dozen.
Explanation:
This is mainly seen in the control of hazardous waste and its regulations through treaty in the control of persistent organic pollutant(POPs). This regulation is seen to occur in 12 widely used persistent organic pollutants; these are seen to have the ability to absorb and store tissues that make them fatty especially in humans and also animals found in the higher trophic levels or in the food web. That being said, it can be noted that the dirty dozen can move or even attain hundreds, or thousands of levels towards the environ and also in other cases, transporting them through air or water as the case may be.
Which form of erosion would be the slowest?
Answer:
wind is the correct answer
In an atom model, the first energy level can hold _____ electrons, the second level can hold _____ electrons, and the third level can hold _____ electrons.
Answer:
In an atom model, the first energy level can hold 2 electrons, the second level can hold 8 electrons, and the third level can hold 18 electrons.
Explanation:
The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).
There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level. Electrons with less energy will be spinning at level 1. Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4. These 4 sub-levels are called: s, p, d, f. In the sub-level s there can only be a maximum of 2 electrons, in p there can be a maximum of 6 electrons, in the sub-level d 10 electrons and finally in the sub-level f there can be a maximum of 14 electrons.
In level 1 there is only one sub-level, which will be the s. In level 2 there are 2 sub-levels, the s and the p. At level 3 there are 3 sub-levels s, p and d. And at level 4 there are 4 sub-levels, the s, the p, the d and the f.
Then, in an atom model, the first energy level can hold 2 electrons, the second level can hold 8 electrons, and the third level can hold 18 electrons.
5. Calculate the time required to deposit 0.37g of Silver from a silverNitrate solution using a current of 2.5A( Charge of Ag in AgNO3 is + 1)
Time required : 132.2 s
Further explanationGiven
mass of Silver = 0.37 g
current = 2.5 A
Required
time do deposit
Solution
Faraday's Law :
[tex]\tt W=\dfrac{e.i.t}{96500}[/tex]
e = ar/valence (valence Ag = 1)
i = current
t = time = s
[tex]\tt 0.37~g=\dfrac{108/1\times 2.5~A\times t }{96500}\\\\t=132.2~s[/tex]
The SI unit for length is?
Answer:
Metre
Explanation:
the SI unit of length is Metre
Answer:
The SI unit for length is Meter
A 23.7 g piece of iron at 54.9 C is cooled and releases 338 J of heat. The specific heat of iron is 0.450 J/gC. What is the final temperature of the iron?
Answer:
39
Explanation:
cux it is
Answer: 23.3 °C
Explanation: The one above is wrong
is p2 polar or no polar
Answer:
Non-polar
Explanation:
The way to determine if something is polar is by subtracting their electronegativity values. The two atoms in this molecule are both phosphorous which have equal electronegativity values (since they are both phosphorus). Anything minus itself will equal 0. If the final difference between the electronegativity values is less than 0.4, it will be non-polar. Since the result is 0, P2 is non-polar.
In P₂ molecule there is absence of partial charges, thus the molecule has been nonpolar.
The molecules have been differentiated based on polarity as polar and nonpolar molecules. The molecules that have been comprised of the difference in the electronegativity of the elements and develop partial charges have been termed polar compounds.
The compounds with no difference in electronegativity and absence of partial charges are termed nonpolar molecules. In the P₂ molecule, there have 2 phosphorus molecules with the same electronegativities.
Since there has been an absence of polarity in the molecule, the molecule of P₂ is nonpolar.
For more information about polar molecules, refer to the link:
https://brainly.com/question/24775418
how many group and periods are there in modern periodic table
Answer:
there is 7 periods and 18 groups
Explanation:
How many moles are in 34.2 g Ca
Answer:
0.855 moles are present in 34.2 g of Ca
What may be the most important tool to use for collecting data when conducting an investigation into how thermal energy affects metals? goggles beaker thermometer graduated cylinder
Answer:
thermometer
Explanation:
The most important tool to use when collecting data relating to how thermal energy affects metals would be the thermometer.
The thermometer is an instrument used to measure temperatures and the temperature of a body is a measure of the amount of thermal energy present in the body.
In order to obtain data relating to how thermal energy affects metals, the most important variable to take note of would be the thermal energy of the metals and this can only be done by the thermometer.
what you could get from each meal and what you would need that nutrient for
Answer:
You can get calcium from foods and it helps to build strong bones. You can also get iron from food and it helps with blood health. Vitamin C and D3 are also common and help with immune health and D3 and biotin helps with the growth of hair, nails and skin health.
Explanation:
what is meant by polimer
Answer:
i don't knoblol
Explanation:
i don't know lol
Answer:
a compound of high molecular weight derived either by the addition of many smaller molecules, as polyethylene, or by the condensation of many smaller molecules with the elimination of water, alcohol, or the like, as nylon. a compound formed from two or more polymeric compounds.
Explanation:
HOPE IT HELPS YOU:))
Find the volume of oxygen with a density of 0.001331 g/ml that has a mass of 250.0 g.
Answer:
187,828.7 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 we have
[tex]volume = \frac{250}{0.001331} \\ = 187828.70025...[/tex]
We have the final answer as
187,828.7 mLHope this helps you
Who do you think we (humans) are more related to bats, or chickens?
Answer:
prolly chickens
Describe in three sentences how Ca (Calcium) can get a positive two charge?
In order to become stable, Potassium, K, will _______ and have a resulting charge of _____.
A)gain an electron, +1
B)gain 7 electrons, +7
C)lose an electron , +1
D)gain 7 electrons, -7
Answer:
D
Explanation:
it doesn't matter how many protons k has all the answers have electron with the positive charge when is negative the question is trying to distract you D is the only one that would use the electrons sign correctly
The ionization energies for successive removal of electrons from sodium are as follows: 496kJ, 4562kJ, 6912kJ, and 9544kJ. What does the jump in ionization energy indicate
Answer:
It is difficult to remove electrons from cations because one or more electrons are already lost and hold of nucleus on remaining electrons increase
Explanation:
CH4(g) + 2O2(g) = CO2(g) + 2H2O(g)
How many moles of CH4 are required to react completely with 0.08 mole of O2?
Answer:
0.04 moles of CH₄ are required
Explanation:
Given data:
Number of moles of CH₄ required = ?
Number of moles of O₂ present = 0.08 mol
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
now we will compare the moles of oxygen and methane.
O₂ : CH₄
2 : 1
0.08 : 1/2×0.08 = 0.04
Thus, 0.04 moles of CH₄ are required.
6. What is (are) the product(s) in this reaction?
CO2(g) + H2O(l) → H2CO3(aq)
a.
HCO3
b. H2O only
c. CO2 only
d. CO2 and H2O
Answer:
This type of reaction almost always produces a gas. The following are examples of decomposition reactions: Heating mercury (II) oxide produces oxygen gas: 2HgO (s) → 2Hg (l) + O2 (g). Leaving the cap off the carbonated soft drink bottle allows the carbonic acid to release carbon dioxide: H2CO3 (aq) → H2O (l) + CO2 (g). Hope this helps :)
Answer:
H2CO3
the product is H2CO3 because it is on the right side of the arrow where as the others are on the left side of the arrow (making them reactants)
What does one mole of oxygen and one mole of carbon dioxide have in common?
Answer:
Equal number of moles
Explanation:
Thats life
the outer skin makes the surfboard more expensive. Suggest two reasons why an outer skin is added to the polystyerene core.
(2 marks)
Answer:
It helps it not to break or crack. It is like an outer shell to protect it.
Explanation:
Which of the following is NOT a product of photosynthesis?
A. glucose
B. energy
C. oxygen
D. carbon dioxide
B is the answer..............
Answer:
D. Carbon Dioxide
Explanation:
Carbon is what enters the plant. It isn't a product of the plant.
What did the Curies conclude about radioactivity based on their studies?
A. The amount of radioactivity is an extensive property because it varies as the amount of material varies.
B. The amount of radioactivity is an extensive property because it remains constant as the amount of material varies.
C. The amount of radioactivity is an intensive property because it varies as the amount of material varies.
D. The amount of radioactivity is an intensive property because it remains constant as the amount of material varies.
Answer:
c
Explanation:
In animals, energy is produced by the:
A. chloroplast
B. endoplasmic reticulum
C. mitochondria
D. nucleus
Answer:
C. Mitochondria
Explanation:
What is happening to the total amount of water on earth?
Olt is increasing.
Olt is decreasing.
Otisn't changing.
Answer:
It isnt changing
Explanation:
It stays basically the same becuase it is considered a constant
The atomic number of polassium and
calcium is 19 and 20 respectively and they
belong to the same period.
Who among them would have smaller atomic size
Explanation:
Atomic radius decreases from left to right in a period.
Therefore Calcium would have a smaller atomic size.
The amount of resistance to a change in motion an object demonstrates is a direct function of its:
Answer:
Newton second law maybe?
What does a ground wire do?
Answer:
A ground wire helps those positive charges get to the ground in a safe, direct and controlled way, where they can be discharged without the risk of electrical shock or fire. Shock Absorber Excess electrical charges are common in any home.
Explanation:
:3
A bicycle weighs 780. pounds. If the pressure exerted by its
tires on the ground is 30.5 pounds per square centimeter, what
is the area of one of the two tires that's in contact with the
road? (This will be half as much as the pressure exerted by
both tires.)
Answer:it’s 12.8cm^2 and I saw that last anwser and he’s not wrong but yeah I had trouble figuring it out but it’s just force divided by area for both tires multiply that by 2
Explanation:
A bicycle weighs 780. pounds. If the pressure exerted by its tires on the ground is 30.5 pounds per square centimeter, the area of one of the two tires that's in contact with the road is 12.8cm².it’s just force divided by area for both tires multiply that by 2.
What is pressure ?Pressure is defined as the force applied perpendicular to an object's surface per unit area over which that force is distributed. Gauge pressure is the pressure in relation to the surrounding atmosphere. Pressure is expressed using a variety of units.
Pressure is defined as force per unit area of surface; the SI unit of pressure is the pascal (Pa), which is defined as one newton per square metre (N/m2). An object's pressure is proportional to the force it exerts and inversely proportional to the area over which the force is exerted.
The physical force exerted on an object is defined as pressure. The force applied per unit area is perpendicular to the surface of the objects. F/A is the basic pressure formula (Force per unit area).
Thus, the area of one of the two tires that's in contact with the road is 12.8cm².
To learn more about the pressure, follow the link;
https://brainly.com/question/29341536
#SPJ2
Which product contains a strong base that would most likely completely dissolve in water?
drain cleaner
ammonia
baking soda
antacid
Answer:
Drain Cleaner
Explanation:
I just took the test and got it right :)
drain cleaner............................
