Answer:
d i believe
Explanation:
Answer:
It's 100% B, The book on the table.
Explanation:
When a comet enters the solar system, it curves toward the sun. Which statement describes why the sun does not move when a comet is nearby?
Answer:
Explanation:
When a comet enters the solar system it curves towards the Sun due to the Sun's gravitational pull. Every celestial object in the universe has a gravitational pull whose force is dependent on the object's mass. The larger the object is the more gravitational pull it will have. The Sun is the largest object in our Solar system and therefore has the most gravitational pull. This is why the comet curves toward the Sun, but the opposite does not happen because the comet's gravitational pull is not strong enough to pull the Sun.
how many atoms are present in the compound (nh4)2cr2o7
Answer:
2,8,2,and,7
Explanation:
In 2011, fires in Bastrop County, Texas were the most damaging wildfires in Texas history. The fire spread through the pine trees and scorched nearly 5,700 acres of Bastrop State Park. The majority of the Houston toad’s habitat was lost, and the Lost Pines Forest was greatly affected. As ecological succession began, which of these most likely appeared in the Bastrop forest area first?
A.Shrubs and trees
B. Newly developed topsoil
C.Weeds and grasses
D.Lichens on fallen trees
The most likely appeared in the Bastrop forest area first is to be considered as the C.Weeds and grasses.
What is ecology?It is the study that represents the relationships between a living organism that involved the human, and the physical environment.
It is at the individual, population, community, ecosystem, etc.
Hence, the option c is correct.
Learn more about an area here: https://brainly.com/question/14403188
How to convert the mass of a substance to the number of moles of a substance, and moles to mass
Answer:
Explanation:
To convert the mass to moles, divide the mass by the atomic weight of the element or compound.
To convert back to mass from the moles, multiply the moles by the atomic weight of the element or compound
What is the ratio of the effusion rate of the helium to methane? (round to hundreds)
Answer:
2.00
Explanation:
From Graham's law; the rate of effusion is inversely proportional to the square root of the relative molecular mass.
Let the rate of effusion of Helium be R1
Let the rate of effusion of Methane be R2
Let the molecular mass of Helium be M1
Let the molecular mass of Methane be M2
Hence;
R1/R2 = √M2/M1
R1/R2 = √16.0294/4.0026
R1/R2 = 2.00
Most of earths fresh water is in glaciers
True or false
PEASE HELPP
Answer:
True
Explanation:
The amount of space is ___ and a common unit is ___.
A. mass, gram
B. volume, gram
C. mass, mL
D. volume, mL
Answer:
c
Explanation:
Give the formula for trinitrogen hexafluoride
What temperature kelvin would .97mol of gas be to occupy 26L at 751.2mmHg?
Answer: 322.56 Kelvin
Explanation:
Use the Ideal Gas Law
[tex]PV=nRT[/tex]
R is the gas constant
T is the temperature in Kelvins
P is the pressure in atmospheres
V is the volume in liters
n is the number of moles of gas
First, the mm of mercury need to be converted to atmospheres using the conversion factor 1atm = 760 torr.
[tex]751.2mmHg (torr) =0.988atm[/tex]
Now plug everything in
[tex](0.988)(26)=(0.97)(0.0821)T\\T=322.56K[/tex]
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.
You are growing a garden and notice that the soil is always wet. What type of soil do you have?
Sand
Silt
Clay
Loam
Answer:
Clay
Explanation:
clay does not allow water to flow
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:
What do normal people call it?
Explanation:
crystal rocks blue ig
.
.
i don’t know:(
please help!
Answer:
its b , Symmetrical and nonpolar
Explanation:
Its c
Answer:
Explanation:
Give the number of protons, electrons and neutrons in one atom of Carbon.
Answer:
6 protons, 6 neutrons, and 6 electrons.
Explanation:
someone please help me with this????
Answer:
D po ayan po ang sagot ko salamat po
balance the equations
Answer: a) [tex]H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O[/tex]
b) [tex]PCl_3+3H_2O\rightarrow P(OH)_3+3HCl[/tex]
c) [tex]2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.
The balanced chemical equations are :
[tex]H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O[/tex]
[tex]PCl_3+3H_2O\rightarrow P(OH)_3+3HCl[/tex]
[tex]2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2[/tex]
Electrotonic configuration of potassium 19K ion equal the Electrotonic configuration of
1) ⁸0
2) ¹¹Na
3) ¹⁸Ar
4) ¹⁷C1
Pls help me i have been seeing people giving out the wrong answers on purpose and I just don't want that so pls
Answer:
B
Explanation:
Answer:
I think the answer is B. I need 20 characters but I can't think of anything else to type.
WILL VOTE BEST & GIVE 25 POINTS - PLEASE ANSWER
Your mom needs some pills from the Walgreens pharmacy for her diabetic medication. If one of the
pills weighs 650mg and the technician weighs exactly 15.6g of pills, how many pill were dispensed
and placed into the pill bottles. Show all work with units.
Answer:
24 pills
Explanation:
650 mg/1000 = 0.65 g
(There are 1000 mg in one g)
15.6g/0.65g=24
When KCL dissolved in ethanol, what is the intermolecular attraction between K+ ions and ethanol molecules?
Answer: Ion-Dipole
Explanation: I took the CK-12 practice and got it right
When KCL dissolved in ethanol, the intermolecular attraction between K+ ions and ethanol molecules is ion - dipole interaction.
What is an ion dipole interaction ?The term ion-dipole interaction is defined as the intermolecular force of attraction between cation or anion and a molecule. It is present in the solution where ionic compounds dissolve in polar solvents.
Due to the polar O-H group's presence in the molecule, ethanol is a polar substance. Thus, the molecule has a dipole moment. The dipole's positive end rests on hydrogen, and its negative end rests on oxygen.
K+ ions can interact with the ethanol's negative end of the dipole through ion-dipole interaction when KCl is dissolved in the alcohol.
Thus, When KCL dissolved in ethanol, the intermolecular attraction between K+ ions and ethanol molecules is ion - dipole interaction.
To learn more about an ion dipole interaction, follow the link;
https://brainly.com/question/13950662
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Calculate the pH if the pOH = 7.4
Round your answer to two decimal places.
i need points
Explanation:
A solution has [H+] = 7.65*10^-3 what is the [OH-] in the solution?
Answer:
The hydroxide ion concentration in an aqueous solution, [OH-], in mol L-1, can be calculated if the pOH of the solution is known.
pOH is defined as the negative logarithm (to base 10) of the hydroxide ion concentration in mol L-1 pOH = -log10[OH-]
Explanation:
How does density affect the organization of earth?
A : The densest material is closest to the center
B : The density material is farthest from the center.
C : The densest material is near the center
D : Density differences allow Earth materials to mix freely. ( science by the way )
Answer:
Earth has layers because of density. Dense materials such as iron sank to the middle of the Earth, the center of its gravity. Less dense materials stayed at the top.
Explanation:
hope this help:)
The answer to the question, How does density affect the organization of earth is A : The densest material is closest to the center
The earth is made up of different layers namely,
The crustThe upper mantleThe lower mantleThe outer core andThe inner core.Each layer goes from topmost to inner most and the density of each layer increases as we moves closer to the center of the earth.
So, the densest material is closest to the center.
So, the answer to the question, How does density affect the organization of earth is A : The densest material is closest to the center
Learn more about density of the earth here:
https://brainly.com/question/14505036
how many moles are in 5g of Na2CO3?
a) 0.047
b) 1
c) 2
d)21.2
Answer:
0.047
Explanation:
Data : 5g , Na2CO3
Formula:
Molecular mass of Na2Co3 = no.of atomic mass x no. of atom
moles = mass÷ molecular mass
molecular mass = 2(23)+1(12)+3(16)
=106amu
moles = 5÷106
= 0.047 Ans:
What is the freezing point of solution that has 185.25 grams of Ca(OH)2 (formula mass = 74.1) dissolved in 2,500 grams of water at standard pressure?
Answer:
The freezing point depression ∆T = KF·m where KF is the molal freezing point depression constant and m is the molality of the solute. Rearrangement gives: mol solute = (m) x (kg solvent) where kg of solvent is the mass of the solvent (lauric acid) in the mixture. This gives the moles of the solute.
Explanation:
Does this help at all??
The thin muscular wall that separates the right side of the heart from the left side is called the
What part of a chemical is represented by the letters
Answer:
It's compound? It's chemical compound would be represented my letters or numbers
Answer:
The letters in a chemical formula are the symbols for the specific elements. So for example, H means hydrogen, O means oxygen, S means sul fur, C u means copper, F means fluorine, Fe means iron and Au means gold.
Explanation:
Yea, Hope I helped
Brainly appreciated
what is the name of the world's first scientist?
Answer:
Aristotle is considered by many to be the first scientist, although the term postdates him by more than two millennia. In Greece in the fourth century BC, he pioneered the techniques of logic, observation, inquiry and demonstration.
Explanation:
hope this help:))
3) What are the three types of sedimentary rocks?
Answer:
clastic, organic, and chemical