25. Complete the following nuclear reaction: (2 pts)
- 92 U → 4-2He + 231 - Th
Answer:
7
Explanation:
ASAP PLEASE!!!!!!!! Organic chem
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
Plants use evaporative cooling.
Question 4 options:
True
False
Answer:
true
Explanation:
ever heard of "plant perspiration"?
Which of the following is not a part of the digestive system
A. Mouth
B.Esophagus
C.Intestines
D.Kidneys
Answer:
Kidneys •_•
Hope this helped <3
What is the percent by mass of fluorine in CaF2?
65%
24%
49%
51%
The percentage of fluorine in the given compound is 49%.
The given compound;
CaF₂
The molecular mass of the given compound is calculated as follows;
CaF₂ = (40) + (19 x 2)
= 40 + 38
= 78 g/mol
The mass of fluorine in the given compound = 38 g/mol
The percentage of fluorine in the given compound is calculated as follows;
[tex]= \frac{38}{78} \times 100\%\\\\= 48.7 \%\\\\\approx 49\%[/tex]
Thus, the percentage of fluorine in the given compound is 49%.
Learn more about percentage of element in a compound here: https://brainly.com/question/21044245
How many grams are in 3.1 moles of aluminum oxide?
0.03g
316.08g
32.89g
Answer:
316.08g
How many moles Al2O3 in 1 grams? The answer is 0.0098076450122103. We assume you are converting between moles Al2O3 and gram. You can view more details on each measurement unit: molecular weight of Al2O3 or grams This compound is also known as Aluminium Oxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Al2O3, or 101.961276 grams. Note that rounding errors may occur, so always check the results.
Which of the 3 molecules: Methane, Propane, Butane would release the most energy when combusted?
Answer:
butane
Explanation:
what is 412.12 reduced to two significant figures?
Answer: 410
Explanation:
Drop the retaining numbers 1 and 2 after the decimal and then round the 2 in 412 to 0 because any number less than 5 rounds to 0. 0 shouldn’t count as a sig fig.
what type of reaction is Fe(NO3)3 + 3NaOH → Fe(OH)3 + 3NaNO3
Answer:
it's a double displacement reaction
Explanation:
Is the following statement true or false:
Cellular respiration only occurs in animal cells.
Question 1 options:
True
False
Answer:
False
Explanation:
Humans and plans do it as well
Answer:
False
Explanation:
Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals.
Which PAIRS below are PHASE CHANGES that occur at the same temperature? (Choose the 2 correct statements.) *
Freezing and Condensation
Freezing and Melting
Vaporization and Condensation
Melting and Vaporization
Answer:
I would say C and D
Explanation:
Hope this helps my good friend :)
According to the forces of attraction, the phase changes that occur at the same temperature are vaporization and condensation, melting and vaporization .
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
Learn more about forces of attraction,here:
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explain the geological process that results in the formation of minerals!!
will give brainly!
Answer: The four main categories of mineral formation are: (1) igneous, or magmatic, in which minerals crystallize from a melt, (2) sedimentary, in which minerals are the result of sedimentation, a process whose raw materials are particles from other rocks that have undergone weathering or erosion, (3) metamorphic, in which
Explanation:
Answer:
The four main categories of mineral formation are: (1) igneous, or magmatic, in which minerals crystallize from a melt, (2) sedimentary, in which minerals are the result of sedimentation, a process whose raw materials are particles from other rocks that have undergone weathering or erosion, (3) metamorphic.
What is the average speed of 3043 km from houston to seattle in 5.5 hours rounded to the nearest hundredth
Answer:
The average speed is 553.27[tex]\frac{km}{hour}[/tex]
Explanation:
Speed is the physical magnitude that shows and expresses the variation in position of an object and as a function of time. In other words, the speed relates the distance traveled by an object in the unit of time.
The average speed is the quotient of the space traveled by an object and the time it takes to cover the path:
[tex]speed=\frac{distance}{time}[/tex]
In this case:
distance: 3,043 kmtime: 5.5 hoursSo, replacing in the definition of speed:
[tex]speed=\frac{3,043 km}{5.5 hours}[/tex]
Solving:
speed= 553.27[tex]\frac{km}{hour}[/tex]
The average speed is 553.27[tex]\frac{km}{hour}[/tex]
1. Find the mass of 0.89 mol of CaCl2.
Answer:
97.9
Explanation:
m= n*M
M CaCl2= 40+ 35.5*2= 110
m= 0.89*110= 97.9
The mass of the given mole of [tex]CaCl_2[/tex] is required.
The mass of the given compound is 98.78 g.
Molar mass of [tex]CaCl_2[/tex]
[tex]M=40.078+35.453\times 2=110.984\ \text{g/mol}[/tex]
n = Number of moles = 0.89 mol
Mass is given by
[tex]m=Mn\\\Rightarrow m=110.984\times 0.89\\\Rightarrow m=98.78\ \text{g}[/tex]
The mass of the given compound is 98.78 g.
Learn more:
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In two or more complete sentences describe the relationship between traits, genes, chromosomes and DNA?
Answer:
Chromosomes threads of DNA that make up a twisty, coiled shape. DNA strands carry genes, and traits are influenced by the genes that people get from their biological parents.
Explanation:
I got this from goggle ...
Calculate AH for the following reaction.
C2H4(g) + H2(g) → C2H6(g)
(ΔHf° for C2H4(g) = 52.5 kJ/mol; ΔHf° for C2H6(g) = -84.7 kJ/mol)
a. -137.2 kJ
b. -32.2 kJ
c. 32.2 kJ
d. 137.2 kJ
Answer:
a.-137.2 kJ
Explanation:
If the first example symbol used is addition you can copy the plus and follow it how to solve the next!And also if the negative or positive sign.
What is Redox reaction? What is oxidized, reduced, oxidizing, and reducing agent?
Answer:
Explained below.
Explanation:
- Redox reaction is defined as any type of chemical reaction whereby the oxidation number of a participating chemical atoms/elements undergo changes.
- The atom that is oxidized is the one that has an increase in it's oxidation number.
- The atom that is reduced is the one that has a decrease in its oxidation number.
- The reducing agent is defined as the atom that is oxidized.
- The oxidizing agent is defined as the atom that is reduced.
how many moles are in 160.4 grams of calcium hydroxide show work
Answer:
2.1648562314118083
Explanation:
1 mole = 74.09268.
We assume you are converting between grams Calcium Hydroxide and mole.
Plus you will need to round up the number for answer
Why is overuse of resources a problem ?????
Answer: the overuse of resources will lead to a decline of the resources, the question was a little non specific so this was the best I could do :)
Explanation:
How far does a car travel if its traveling 15 m/s for 28 seconds.
PLEASE HELP!!!
Used to determine an elements reactivity
A. atomic number
B. atomic mass
C. valence electrons
D. electron cloud
Answer:
it is c
Explanation:
the number of electrons in the outermost shell of an atom determines its reactivity
Why the recombinant DNA is reintroduced into the bacterium?
Which of these would be a good insulator of electricity?
Group of answer choices
Steel
Rubber
Copper
Aluminum
Answer:
Rubber
Explanation:
Answer:
copper
Explanation:
5. How would the food web in Figure 7 change if the numbers of red foxes were
greatly reduced by hunters?
Help meee
Answer:
I cant help you because you didn't provide a picture for the graph
Explanation:
____________ acceleration involves speeding up, while ____________ acceleration involves slowing down. a. positive, negative c. positive, braking b. negative, positive d. both a and c
Answer:
Positive acceleration involves speeding up, while negative acceleration involves slowing down.
Explanation:
I am so sorry if I was wrong!
Answer:
no just no
Explanation:
The half reaction of an oxidation-reduction reaction shows that iron gains electrons. What does this electron gain mean for iron?
A.
It is neutralized.
B.
It is oxidized.
C.
It is reduced.
D.
It has dissolved.
E.
It has precipitated.
Answer: C. It is reduced.
Explanation:
Answer:
C
Explanation:
Because it is reduced.
What is thought to cause the Earth's magnetic field
Answer:
It is caused by currents of electricity that flow in the molten core.
What are the three components of soil texture?
Hurry please help!
Answer: sand, silt, and clay.
What causes hydrogen bonding? A.attraction between ions, B.motion of electrons, C.bonding of a covalently bonded hydrogen atom with an unshared electron pair, D.sharing of electron pairs between two adjacent hydrogen atoms
2. When two oppositely charged particles are brought near each other, they produce a torceted the stone
shows the force around two changed particles
Which force do the arrows represent?
A an unbalanced force
B. a frictional force
C.an electrical force
D.a gravitational force
Answer:
A
Explanation:
An unbalanced force is your answer.