Can somebody help me plz
Answer:r=1.2 d=2.4
Explanation:
Radius is half the diameter and the diameter is 2.4 m
Answer:
Divide the 2.4 by 3.14
Explanation:
Most females have one X and one Y (XY) sex chromosome.
true or false
Answer:
falseeee a female has two X's and the male has XY
Explanation:
learned this in biology last year
(M1)(M2)+(M2)(P2)=(12.000000)(.9890)+(13.003354)(.1100)=amu
Answer:
The answer would most likely be 4.0004
Explanation:
How far does a car travel if its traveling 15 m/s for 28 seconds.
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.
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25. Complete the following nuclear reaction: (2 pts)
- 92 U → 4-2He + 231 - Th
Answer:
7
Explanation:
What is condensation ?
Answer:
gvapor or gas to liquid
Explanation:
water which collects as droplets on cold surface when humid air is in contact with it
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.
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%.
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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.
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
Which of the 3 molecules: Methane, Propane, Butane would release the most energy when combusted?
Answer:
butane
Explanation:
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
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.
Salinity is another word for
Question 3 options:
saltiness
density
temperature
depth
Answer:
Saltiness
Explanation:
There is no step-by-step. It h us is what it is.
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 ...
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
help me with this question please !
Answer:
its C
Explanation:
Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity.
Answer: I wanna say B
Explanation:
It makes the most scenes out of all of those answers let me know if im right:)
PLEASE HELP!!!What are the factors of climate change
Answer:
According to The genic variations in atmospheric compositions and proper use of land or the other factors the cahs climate change
What is thought to cause the Earth's magnetic field
Answer:
It is caused by currents of electricity that flow in the molten core.
Using the empirical formula, calculate the formula weight of the compound. Use the periodic table to help you.
Type the correct answer in the box. Round your answer to three decimal places.
Answer:
The formula weight of the compound is
46.069 g/mol.
Explanation:
Determine the molar mass from the empirical formula (C2H6O) by multiplying the molar mass of each element in the compound by the number of atoms of it and adding the resulting masses of the elements:
molar mass of C2H6O = (2 × 12.011 g/mol) + (6 × 1.008 g/mol) + (1 × 15.999 g/mol) = 46.069 g/mol.
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.
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
what type of reaction is Fe(NO3)3 + 3NaOH → Fe(OH)3 + 3NaNO3
Answer:
it's a double displacement reaction
Explanation:
Plants use evaporative cooling.
Question 4 options:
True
False
Answer:
true
Explanation:
ever heard of "plant perspiration"?
Looking at the Periodic Table, how can you determine if an element is a metal, metalloid or nonmetal?
Answer:
It depends on where it's located on the periodic table.
Explanation:
Metals are on left side of the periodic table except Hydrogen (H), which is a nonmetal, then there's the staircase, which has the metalloids, and on the right of the staircase are the nonmetals.
Which of these would be a good insulator of electricity?
Group of answer choices
Steel
Rubber
Copper
Aluminum
Answer:
Rubber
Explanation:
Answer:
copper
Explanation:
Why the recombinant DNA is reintroduced into the bacterium?
NUCLEAR REACTIONS
complete the nuclear reaction...
125
125
53
53
y HeeHn
ODRAG
The correct option for the following reaction is [tex]\gamma[/tex].
In the given reaction we can easily see that the reaction is already complete as a nuclear equation. There is no need for the product to balance the equation as it is not a chemical reaction where reactants and products interact to form new substances.
In this question we can see that a radioactive isotope of iodine-125 ( [tex]^{125}_{53} I[/tex] ) is decaying to produce another isotope of iodine-125 ( [tex]^{125}_{53}I[/tex] ) this process is called beta decay.
As no new element is required to balance the reaction we can say that the answer to this is [tex]\gamma[/tex] as it doesn't add up anything to the reaction.
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1. What is the volume
occupied by 20.4 liters of
CO2 at 1200 Torr when it is
at STP
Answer:
Explanation:
From your question you’ll have to assumethat the temperature is constant,since you do not have an initial temperature.
If thats the case thrn you can use;
P1V1=P2V2 to calculate the second volume.
P1=1200 torr
P2=760 torr
V1 = 20.4L
The volume occupied by 20.4 liters of Carbon dioxide (CO₂) at 1200 Torr when it is at Standard temperature pressure is 32.21 L.
How we calculate the volume?Volume of gas can be calculated by arranging the ideal gas equation as:
P₁V₁ = P₂V₂, where
P₁ = given pressure = 1200 Torr
V₁ = given volume = 20.4 L
P₂ = standard pressure = 760 Torr
V₂ = to find?
Here, we consider the moles and temperature of gas is constant, on putting all these value on the above equation we get:
V₂ = (1200 × 20.4) / 760 = 32.21 L
Hence, 32.21 L is the required volume.
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