Answer:
the words to identify them is them in kaps right
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.
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.
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
PLS HELPPP How many moles of oxygen atoms (not molecules) are present in 6.41×1025 molecules of dinitrogen pentoxide (N2O5)? 1. 532 mol 2. 106 mol 3. 32 × 1025 mol 4. 266 mol
Answer:
(4) 266 moles
Explanation:
We have Dinitrogen Pentoxide N2O5
6.41*10^25 molecules are given
No of Moles of N2O5 = [tex]\frac{No of Molecules }{Avogadro's Number}[/tex]
= [tex]\frac{6.41 * 10^25}{6.022*10^23}[/tex]
= 106.5 mol
Now using Unitary Method
2 Mole of Nitrogen pentoxide require 5 mole of Oxygen to form N2O5
1 mole of N = [tex]\frac{5}{2}*O[/tex]
In 106.5 mole of N = [tex]\frac{5}{2}*106.5[/tex] = 266.25 mole
So, 6.41*10^25 molecules of N2O5 will require 266.25 mole of Oxygen atoms.
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:
Are we the only person in the universe?
Answer:
no..? how would we be the only person in the universe
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.
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 .
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]
. 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
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
Help with this please
Is tap water electrolytes or nonelectrolytes?
Is sugar solution electrolytes or nonelectrolytes?
Is lactic acid solution electrolytes or nonelectrolytes?
Answer:
electrolytes yes it is
Explanation:
i'm built different
i will do anything just pls answer this like anythting
Answer:
second
Explanation:
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:
Determine between what two integers the square root of a number is
Answer:
If you have your square roots for memory, you know that the square root of 36 is equal to 6. Use a calculator to check your work. Take the square root of 36, as well as the square roots of the two integers surrounding 36, and make sure that the square root of 36 is between the square roots of the two integers.
Explanation:
Multiply 4 2/3 and 1 2/7
Answer:
6
Explanation:
First, turn the mixed numbers into improper fractions.
4 2/3 = 14/3
1 2/7 = 9/7
Next, find the LCM of the denominators of the fractions.
3: 3, 6, 9, 12, 15, 18, 21
7: 7, 14, 21, 28, 35, 42
Then, we can see that 21 is the LCM of 7 and 3 so then we see how many times we had to multiply to get that number.
9/7 x 3/3 = 27/21
14/3 x 7/7 = 98/21
Last you just multiply straight across and simplify if needed.
27/21 x 98/21 = 6/1
6/1 = 6
mark brainliest if helped :D
What volume of 1.60 M hydrochloric acid solution (HCI) is required to neutralize 48.0 mL of 0.200 M sodium
hydroxide solution (NaOH)?
Answer:
Volume of HCl require = 6 mL
Explanation:
Given data:
Volume of HCl require = ?
Molarity of HCl solution = 1.60 M
Volume of NaOH = 48.0 mL
Molarity of NaOH = 0.200 M
Solution:
Formula:
M₁V₁ = M₂V₂
By putting values,
1.60 M×V₁ = 0.200 M×48.0 mL
V₁ = 0.200 M×48.0 mL/1.60 M
V₁ = 9.6 M .mL /1.60 M
V₁ = 6 mL
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.
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.
Which of the following Do plants gain form sunlight
... You didn't attach anything
Which one of these is NOT a sign of chemical change? *
Fire
Bubbles
Liquid
Light
Heat
Cold
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.
Is this question an error or am I missing something?
Answer:
ur missing something`
asap! first to answer correctly gets 10 pts plus brainliest! :)
Answer:
c
Explanation:
c first quarter waxing half moon
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
Which era did we live on in 2008
Answer:
21st century
Explanation:
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!!
Explain why helium (He) is stable (unreactive), but hydrogen (H) is unstable (reactive)
Answer:
Helium is stable because it has 1 shell and the first shell can only have 2 electrons. Hydrogen is unstable because it has 1 shell but only 1 electron.
Compare and contrast the daughter cells of mitosis and meiosis.
Answer:
For the most part, in mitosis, diploid cells are partitioned into two new diploid cells, while in meiosis, diploid cells are partitioned into four new haploid cells.The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred.
Explanation: