Answer:
D
Explanation:
usa testprep!!!!!
Which one of the next salts is the most soluble in water, if: Ksp (BaCO3) = 5.1 • 10-9 mol2 / l2; Ksp (CaCO3) = 4.8 • 10-9 mol2 / l2; Ksp (BaSO4) = 1.1 • 10-10 mol2 / l2? *
Answer:
Explanation:
Ksp (BaCO₃) = 5.1 x 10⁻⁹
Ksp (CaCO₃) = 4.8 x 10⁻⁹
Ksp (BaSO₄) = 1.1 x 10⁻¹⁰ = .11 x 10⁻⁹
Since solubility product of BaCO₃ is greatest , its solubility is maximum .It is to be noted that all of them will be giving only two number of ions after dissolution in water .
BaCO₃ = Ba⁺ + CO₃⁻
Ksp = [ Ba⁺²] [ CO₃⁻² ]
= [ Ba⁺²]²
[ Ba⁺²] = √ Ksp
similarly we can find equations for others .
Does anyone have the Convection Cells Gizmo Answer key???!!!!!
I NEED IT TO PAST SCIENCE CLASS PLEASE
Answer:
Explanation:A zone in a fluid where hot fluid rises while cold fluid sinks, resulting in a circulation of fluid.
Calculate the density of an aluminum block with a volume of 100 cm3 and a mass of 270g.
Answer:
2.7 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{270}{100} = \frac{27}{10} \\ [/tex]
We have the final answer as
2.7 g/cm³Hope this helps you
Help asap pls i'll give brainiest for the best answer
What may happen if the oceanic plates stop moving?
Erosion would change the color of Earth's surface.
There would be no new island formations.
Volcanoes and earthquakes will destroy life on Earth.
Chemical weathering would not create unique landscapes.
Answer:
There would be no new island formations.
Explanation:
the plates simply dont move so nothing happens
when they do mountains, volcanoes, trenches, exct. form
Answer:
There would be no new island formations.
Explanation:
Hope it helps!!
please help asap!!!
Rotational movements as a result of hot magma rising and cooler magma sinking are called
a- convection currents
b- tectonic shifting
c-magnetic inversions
Answer:
a
Explanation:
a convection currents
Chemical or physical change pls help
9 physical
10 physical
11 physical
12 chemical
13 physical
14 chemical
15 physical
If it does not change the chemical makeup which is shown if it makes a change in color, temp, sound, or produces gas, its just a physical change.
. Write a balanced equation for the
combustion of propane,
C3H8
When balanced, the equation indicates
that moles of
O2 are required for each mole of C3Hg8
Answer: C3H8 + 5O2 = 3CO2 + 4H2O
Explanation:
1. First start by writing out the unbalanced equation
2. Count all the atoms on both sides of the equation
C = 3 C =1
H = 8 O=3
O = 2 H =1
3. Start by balancing the carbon atoms. What would it take to have 3 Carbon atoms on the left? You would add a 3 in front of the carbon atoms on the left side to match the carbon atoms on the right.
4. Now Try balancing the H atoms. You have 8 H atoms on the right and 1 H atom on the left. To balance these out you would need to add a 4 in front of the H atom which gives you 8 on both sides.
5. Now balance out the oxygen atoms. Since we added coefficients to the compounds on the left we now have 10 oxygen on the left 4x1=4 + 3x2=6 now balance out the right side of the equation by adding a 5 in front of the O2 5x2 Oxygen gives you 10.
I hope this helps
Who has a higher frequency X-ray or, radio waves?
Answer:
radio waves
Explanation:
A graph titled Energy Transferred for 50 grams of Metal with vertical axis Energy (Joules) and horizontal axis Type of Material. The first bar labeled sand goes up to 4 Joules. The second bar labeled aluminum goes up to 5 Joules. The third bar labeled steel goes up to 2.5 Joules. The fourth bar labeled lead goes up to 0.75 Joules. In an experiment, 50 g of each material were placed in a calorimeter with the same starting water volume and temperature. Which is the best interpretation of the chart? Lead has the highest specific heat of the four materials shown. The energy transferred and type of material are inversely proportional to each other. Different materials have different abilities to transfer energy. Mass and type of material are proportional.
Answer:
C
Explanation:
trust me got it right on e2020
Answer:
C. Different materials have different abilities to transfer energy.
Explanation:
How I do this? and I need help like now!
Answer:
1ohm
Explanation:
Consider the reaction of lead(II) nitrate reacting with sodium phosphate to create lead(II) phosphate and sodium nitrate. If 37.1 g of lead(II) phosphate was created in the reaction, how much (mass) sodium phosphate was originally needed to produce this amount of product
Mass of sodium phosphate needed : 7.54 g
Further explanationReaction
3Pb(NO₃)₂ + 2Na₃PO₄ → Pb₃(PO₄)₂ + 6NaNO₃
mol Pb₃(PO₄)₂(MW=811.54272 g/mol)
[tex]\tt \dfrac{37.1}{811.54272}=0.046[/tex]
mol Na₃PO₄ = mol Pb₃(PO₄)₂=0.046
mass Na₃PO₄(MW=163,94 g/mol) :
[tex]\tt 0.046\times 163.94=7.54124~g[/tex]
Which one of these is NOT a sign of chemical change? *
Fire
Bubbles
Liquid
Light
Heat
Cold
asap! first to answer correctly gets 10 pts plus brainliest! :)
Answer:
c
Explanation:
c first quarter waxing half moon
Which of the following Do plants gain form sunlight
... You didn't attach anything
How many electrons do you need to be considered to have octect? Will Hydrogen and Chlorine share electrons or transfer electrons to each other? Explain your answer. What element has an octect of two valence electrons? How does octect work? What is the difference between ionic and covalent bonds? How is the chemical bond formed in an inonic compound?
Answer:
(1) The outermost shell should have Eight electrons to complete or called as octet and attain stability.
(2) Hydrogen and Chlorine share Electrons with each other and form Covalent bonding.
(3) Hydrogen forms an octet by obtaining an electron, and Helium is the only element that has an octet with two electrons.
(4) The octet rule states that an atom should attain eight electrons in the outermost shell to get stability, However we have exceptional like Hydrogen and helium.
(5) In Ionic bond there is a formation of Ions of the elements in a compound, like in NaCl there will be Na+ and Cl-.
(6) While in Covalent bond there is sharing of electron between the atoms included like O2.
(7) In ionic bond there is an electrostatic force of attraction while in Covalent bond the is a mutual sharing of electrons.
what ionic are compounds used in our daily life?
Answer:
Explanation:
NaCl sodium Chloride as ordinary salt
Naf sodium fluoride is used in toothpaste which we use every day
What would happen to the moons orbit if the earth disappeared
What functions are performed by the Brainstem?
Answer:
baning and stuff XD
Explanation:
Answer: regulation of breathing
Ability to sense pain
Regulation of circulatory system
Explanation:
The correct name for Mgl, is -
F magnesium iodide
G magnesium iodite
H magnesium (II) iodide
J magnesium diiodide
What molecule is needed for photosynthesis to occur?
Question 2 options:
glucose
oxygen
water
Answer:
i think it is the 2nd one
Explanation:
Scientists now know that most elements come in more than one version. The different versions are called ____________. The difference between them is the number of neutrons in the nucleus.
Answer:
Isotopes
Explanation:
Scientists now know that most elements come in more than one version. The different versions are called Isotopes. The difference between them is the number of neutrons in the nucleus.
Isotopes usually differ in the mass number of the elements which is the reason why they also have a different neutron number. They may also differ in physical characteristics but would most likely have common chemical properties.
Are we the only person in the universe?
Answer:
no..? how would we be the only person in the universe
A gas experts a force of 5,610 N over an area of 0.342 m2. What pressure does the gas expert in Pa?
Answer:
16,403.5 PaExplanation:
The pressure exerted by the gas can be found by using the formula
[tex]p = \frac{f}{a} \\ [/tex]
f is the force
a is the area
From the question we have
[tex]p = \frac{5610}{0.342} \\ 16403.508...[/tex]
We have the final answer as
16,403.5 PaHope this helps you
A topographic map with 4 regions labeled. Region 1 is an area with no contour lines near the railroad. Region 2 is an area with few contour lines. Region 3 is an area with several contour lines close together with index contour line labeled 450. Region 4 is an area with few contour lines.
Which area is the flattest?
1
2
3
4
Answer:
Region one because an area that has contour lines close together means that the area is steep. but in region ones case it has no contour lines meaning the area is flat.
Answer:
A. 1
Explanation:
Which has the greater N-O bond length, NO 2 -1 or NO 3 -1 ?
Answer:
NO 2-1
Explanation:
In an experiment temperature and the amount of NaCI dissolved in water were studied researchers changed the temperature of the water to see if it effects in the amount of NaCI being dissolved They conducted two tests one changing the temperature and another without changing the temperature the temperature change affected the amount of NaCI dissolved in water in this experiment the dependent variable is
Answer:
Dependent variable: Amount of NaCI dissolved in water
Explanation:
In an experiment, the DEPENDENT VARIABLE is the variable that the experimenter measures. It is the variable whose response is dependent on the independent variable.
In this experiment, researchers were studying the temperature and the amount of NaCI dissolved in water i.e. how a change in temperature affected the amount of NaCl dissolved. They conducted two tests one changing the temperature (experimental group) and another without changing the temperature (control group) the temperature change. It is clear that the RESPONDING/DEPENDENT VARIABLE IN THIS EXPERIMENT IS THE AMOUNT OF NACL DISSOLVED.
On the periodic table, groups are elements with similar *
O Atomic Number
O Atomic properties
O Atomic Mass
O None of the Above
Answer:
atomic number
Explanation:
hope this will help u(maybe)
A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. Elements fits into a group of elements with similar properties.
I NEED HELP ASAP!!!!!! IM ON TIMER.
If hydrofluoric acid is a stronger acid than acetic acid, which statement is most likely true?
O The conjugate acid of hydrofluoric acid is weaker than that of acetic acid.
O The conjugate acid of hydrofluoric acid is stronger than that of acetic acid.
O The conjugate base of hydrofluoric acid is weaker than that of acetic acid.
O The conjugate base of hydrofluoric acid is stronger than that of acetic acid.
Answer:
C: The conjugate base of hydrofluoric acid is weaker than that of acetic acid.
Explanation:
I took the quiz and I put the answer that the other guy put and got it wrong but then it showed me the right answer which is C
Which era did we live on in 2008
Answer:
21st century
Explanation:
Compare the electric repulsion of the protons in the uranium nucleus (element 92) with the repulsion of the protons in the nucleus of barium (element 56).Which repulsion is larger?
Answer:
uranium nucleus
Explanation:
The charge on protons is positive. Hence repulsion is to be expected between the like charges.
The magnitude of repulsion between protons increases with the number of protons present in the nucleus.
Uranium possess 92 protons while barium possess only 56 protons. Hence uranium having a larger number of protons will experience a larger repulsion in its nucleus compared to barium.