Answers
Answer:
a. more mosquitos more malaria
b. DDT worked to keep malaria numbers down by killing mosquitos
c. silent spring's great PR campaign got it banned and with the help of the EPA it was banned almost worldwide and if it was not banned manufacturing it stopped
d. it will continue to increase and 100s of millions of dead will be stacked even higher from malaria
Explanation: it is a tragedy, not sure if that is what you were given to read but that is the side that is rarely told
the birds all dying was not correct, it is not a cartcinogen, it doesn't poison the ocean
here is an interesting quote that is rather telling about how some with power make their decisions
My own doubts came when DDT was introduced for civilian use. In Guyana, within two years it had almost eliminated malaria, but at the same time the birth rate had doubled. So my chief quarrel with DDT in hindsight is that it has greatly added to the population problem.
– Alexander King, cofounder of the Club of Rome, 1990
Absolutely horrific, he is saying that the problem with DDT is that it saved lives
Related Questions
Write the skeletal formula equation for: solid potassium, K, reacts with
chlorine gas, Cl2, to produce solid potassium chloride, KCI.
Answers
word equation is
Potassium metal + Chlorine Gas --------> Potassium Chloride
The chemical equation using symbols and formula is
K (s) +
C
l
2
(g) ---------> 2KCl (s)
the two reactants are Potassium and Chlorine gas , and the product is Potassium Chloride.
K (s) +
C
l
2
(g) ---------> 2KCl (s)
reactant side K = 1 product side K=2
Cl = 2 Cl =2
the number of Cl atoms on both the sides are equal, in order to balance the number of K atoms on both the sides, we add one K on the reactant side.
2K (s) +
C
l
2
(g) ---------> 2KCl (s)
reactant side K = 1 + 1= 2 product side K=2
Cl = 2 Cl =2
the equation is now balanced.
I’m very sorry if it’s wrong I tried my best
The reaction heated up 100 g of water in the beaker from 25 °C to 50.0 °C. The specific heat capacity of water is 4.184 J/g°C. Calculate the amount of heat energy that was released by the reaction.
Answers
Answer:
The amount of heat energy that was released by the reaction is 10,460 J.
Explanation:
Sensible heat is that which a body or an object receives or releases and causes its temperature to increase or decrease without affecting its molecular structure and therefore its state.
In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change). When a body is supplied or absorbed sensible heat, the temperature varies.
The equation that allows calculating heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case:
c= 4.184 [tex]\frac{J}{g*C}[/tex]m= 100 gΔT= Tfinal - Tinitial= 50 C - 25 C= 25 CReplacing:
Q= 4.184 [tex]\frac{J}{g*C}[/tex] *100 g* 25 C
Solving:
Q=10,460 J
The amount of heat energy that was released by the reaction is 10,460 J.
2
DI
-
U
3
ili
=
3
5
5
6
Explain how you think the availability of water affects human population size in a region.
Describe data from Task 1 that allows you to conclude this cause-and-effect
relationship between water availability and population.
Answers
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
What is the number of moles of 60.7 liters of oxygen molecules?
Answers
Answer:
2.17 moles of gas.
Explanation:
Given the reaction: 2 H2 + O2 => O2 = 2 H2O.
What is the total mass of water formed when 497.80 g of oxygen reacts with hydrogen?
Answers
1:2 mol ratio so multiple by 2
= 31.1125 mol of water
Mass = mol x Mr
= 31.1125 x 18 = 560.025g
Choose the words or phrases that correctly complete the paragraph.
Mia decided to research the hydrosphere for a class project. She is focusing on the ways the ocean varies in salinity, temperature, and depth. As you descend into the ocean, the water temperature
Choose-increases, heats,lose force,decreases(for both)
, while the water pressure
Choose...
.
Answers
Answer:
As you descend in the ocean water temperature and pressure decrease.
Explanation:
"Cold water has a higher density than warm water. Water gets colder with depth because cold, salty ocean water sinks to the bottom of the ocean basins below the less dense warmer water near the surface. The sinking and transport of cold, salty water at depth combined with the wind-driven flow of warm water at the surface creates a complex pattern of ocean circulation called the 'global conveyor belt.'" - National Ocean Services
PLS HELPP
1. Take two water molecules and bring them close together. The hydrogen of one water molecule is attracted to what part of the other water molecule?
_____________________________________________________________
2. This attraction between parts of two different polar molecules is called __________ bonding.
_________________________________________________________________
3. Which type of bond holds the oxygen and hydrogen atoms together within a water molecule?
____________________________________________
4. Pull the hydrogen off of the oxygen in a single water molecule. Which bond is stronger, a hydrogen bond or a covalent bond?
_____________________________________________
Answers
Answer:
The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak.
Explanation:
:)
2.) Hydrogen Bonding
3.) Covalent Bonds
4.) Covalent Bond
Write about an object's motion in your own words.
Answers
Answer:
An objects motion is called kinetic energy. Which is energy that is cause by movement or motion
Explanation:
Answer:
An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. An object in motion with a velocity of 2 m/s, East will (in the absence of an unbalanced force) remain in motion with a velocity of 2 m/s, East. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. Objects resist changes in their velocity
Explanation:
an object that is not changing its velocity is said to have an acceleration of 0 m/s/s. Thus, we could provide an alternative means of defining inertia
Calculate the pH if the pOH = 7.4
Round your answer to two decimal places.
Answers
i need points
Explanation:
Therefore 14 - pOH will give you the answer.
14 - 7.4 = 6.6
The pH is 6.6
A sample of xenon gas occupying 10.0 mL is collected in a laboratory at 27°C and 1.25 atm. What is the volume of the gas at standard conditions?
Answers
Imagine that you have 100g of water.
You start dissolving KNO3 in the water and you find that after you've dissolved about 55 g of KNO3, you can't dissolve any more; it just sinks to the bottom.
Approximately what is the temperature of the water?
Round your answer to the nearest whole number and submit the number only; no units.
Answers
Answer:
Explanation:
So, just find 55 on the solubility side and with your finger just move to the right untill you touch the line you should get in between 46-48. I would go more for 48.
Hope you have a wonderful day!
All of the following are forms of water in the atmosphere EXCEPT _________.
Group of answer choices
A. ozone
B. precipitation
C. ice
D. vapor
Answers
Answer:
OZONE
Explanation:
HOPE IT HELP
MARK ME AS BRAINLIEST
What number should replace the question mark to show the number of C6H1206 (glucose) molecules in a balanced
chemical equation?
Answers
Describe Connections in a Text
Describe the connection between coal power and nuclear power from Turn on the Power. Use the
ideas from the Compare Ideas in a Text activity to describe how the ideas are alike and different.
Coal power and nuclear power are
alike because they both...
Coal power and nuclear power are
different because coal power...
and nuclear power...
Answers
Answer:
thanks
Explanation:
Calculate the number of moles of nitrogen dioxide, that contain 4.0*1023 nitrogen dioxide molecule.
Answers
0.66 mol NO₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
4.0 × 10²³ molecules NO₂ (Nitrogen dioxide)
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 4.0 \cdot 10^{23} \ molecules \ NO_2(\frac{1 \ mol \ NO_2}{6.022 \cdot 10^{23} \ molecules \ NO_2})[/tex]Multiply/Divide: [tex]\displaystyle 0.664321 \ mol \ NO_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
0.664321 mol NO₂ ≈ 0.66 mol NO₂
An aluminum ion has 13 protons, 14 neutrons, and 10 electrons. What is the charge of the aluminum ion?
Answers
Answer:
the charge of the aluminum ion is +3
What did scientists believe about caloric? State two examples of the scientific phenomena that the caloric theory explained
Answers
Answer:
that it was difficult, bc they didnt accept the particle model of matter, air molecule get warmer and explains charles law (i think)
In this experiment, you made observations of the ______
and the ____
You used these observations to write the ____
Answers
In this experiment, you made observations of the reactant and the product.
You used these observations to write the balanced chemical equation.
What is chemical equation?The symbolic representation of chemical reaction is called chemical equation.The chemical equation should be balanced.
To learn more about chemical equation here.
https://brainly.com/question/12047033
#SPJ3
Answer:
{first part} reactants, products, balanced chemical equation, classify the reaction
{second part} color change, formation of a gas, formation of a solid
Explanation:
edg 23'
Besides radium, what other world-altering discoveries can you think of that both
led to advancement, and also tragedy?*
Answers
Answer:
I'm not really sure but might be D
One other world-altering discovery that led to both advancement and tragedy is the discovery of nuclear power. Nuclear power has been harnessed for its ability to generate large amounts of energy.
Nuclear science has had significant advancements in various sectors, such as electricity production, medicine, and space exploration. However, the same discovery also led to tragic incidents like the bombings of Hiroshima and Nagasaki during World War II.
These tragic events highlighted the destructive power of nuclear energy and raised concerns about its safety and potential for misuse. Despite the tragic consequences, nuclear power continues to be an important source of energy, but the focus has shifted towards developing safer and more sustainable nuclear technologies.
Learn more about nuclear science,here:
https://brainly.com/question/6593254
#SPJ4
What is the pH for a solution that has an OH ion
concentration of 1.0 x 10^4 M?
Select one:
7
4
10
5
Answers
pOH = -log[OH].
So pOH = 4
pH=14-pOH
pH = 10
Most of earths fresh water is in glaciers
True or false
PEASE HELPP
Answers
Answer:
True
Explanation:
Explanation:
Most of oceans are salt water.
BUT lakes, ponds, springs, glaciers, etc are fresh water
help me on question
pleaseeeeeee
Answers
how many kilocalories of heat are involved in changing the temperature of each of the following: a) 25.0 g ice from -4.00 °c to 0 °c
Answers
3. Find the molar mass of the following compounds:
a. Ammonia NH3
b. Iron (II) Nitrate Fe(NO3)2
Answers
Answer: a.4
Explanation:
n=1
h=3
What scientist use the scientific method to determine if cold was a substance?
Answers
Answer:
diamns
Explanation:
10
10
40
32
O
O
20
10
10
O
20
20
305
2 read the thermometer and fill in the temperature in Celsius and feharient
Answers
Answer:
10-10 above the 0 is positive and the ones below is - (negitive)
Explanation:
what are the group of magnesium and nitrogen ? write the balanced chemical equation for the reaction between two element . what type of chemical reaction is it .
Answers
Explanation:
Magnesium - Group 2
Nitrogen - Group 5
The balanced equation for the reaction is given as;
3Mg + N₂ --> Mg₃N₂
Type of reaction;
Synthesis / Direct Combination
How does chemistry help the environment?
Answers
Answer:
Chemistry can help us to understand, monitor, protect and improve the environment around us.
Explanation:
I hope this helps u! :D
An aluminum (Al) boat anchor has a mass of 6800 grams. How many
moles of aluminum are in the boat anchor?
Answers
Molar mass of Al -26.982
6800/26.982= 252.02 mol
pls answer if you do ty so much
Answers
Answer:
c
Explanation: