Answers
Answer:
B
Explanation:
The student is not able to move the box in D --> 55N, 0N. Since the net force is 0, it means that no force is being applied. So you will choose answer B from your options.
Hope this helps, thank you !!
Related Questions
By what factor does the average kinetic energy of helium atoms in a balloon change as the helium gas is heated from -100.0°C to 73°C? Show all calculations.
Answers
Answer:
Explanation:
is it possible for a balloon with initial pressure of 200 spa to naturally expand ... a sample of argon gas is at pressure 124 kpa and a temp. of 24 degrees C in a ... calculate volume that 2.25 moles of oxygen gas will occupy at standard temp. and pressure ... explain how avg kinetic energy of helium atoms changes as the temp ...
Solve the following problem with the correct number of significant figures.
5.31 cm + 8.4 cm + 7.932 cm
Multiple choice question.
A)
22 cm
B)
21.6 cm
C)
21.642 cm
D)
21.64 cm
Answers
2 Hgo 2 Hg + O2
1. How many grams of mercury (Hg) can be
produced from 3.55 moles of Hgo?
Answers
Answer:
712 moles of Hg are produced
Explanation:
Based on the reaction:
2HgO → 2Hg + O₂
Where 2 moles of HgO reacts producing 2 moles of Hg and 1 mole of O₂
To solve this question we need to find the moles of Hg produced, then, using its molar mass:
Moles Hg:
3.55mol HgO * (2 mol Hg / 2 mol HgO) = 3.55 mol Hg
Grams -Molar mass Hg: 200.59g/mol-:
3.55mol Hg * (200.59g/mol) =
712 moles of Hg are produced
what is hybridization
Answers
Answer:
Hybridization is the concept of mixing atomic orbitals into new hybrid orbitals suitable for the pairing of electrons to form chemical bonds in valance bond theory.
Hope this helps!
Someone please help me with this, i'll give you the brainliest answer and give you a 5 star rating!
Answers
QUICK!!!! please
Which of the following dilutions would produce 2.0M acid from 3.0M acid
A) 3.0mL acid and 2.0mL water
B) 2.0mL acid and 1.0mL water
C) 2.0mL acid and 3.0mL water
D) 1.0mL acid and 2.0mL water
Answers
Answer:
that's a difficult question
Explanation:
Sorry!!!!!
A fluid is a liquid or a(n) _____.
Answers
Answer:
gas...............................
Sound wave a has lower frequency than sounds wave b but both waves have the same amplitude . What must also be true of these two waves ?
Answers
Explanation:
Higher the frequency smaller will be the wavelength. Higher frequency have shorter wavelength and lower frequency waves have larger wavelength. Also, Beats are formed by the superposition of two waves with slightly different frequencies but with similar amplitudes. In time, waves switch between constructive interference and disruptive interference, giving the resultant wave a time-varying amplitude.
The true statement about these two waves is option C. Wave A has a lower pitch.
Sound waves:
Sound waves when traveling via air are known as longitudinal waves .
Since sound passes via air, the particles of air does not vibrate in a transverse manner. Also, amplitude controls the loudness while on the other hand, frequency controlled the pitch. That means, the more frequent the higher should be the pitch.
Therefore, the correct option is C.
Learn more about the wave here: https://brainly.com/question/1820914
How many moles are there in 3.9 grams of potassium
Answers
Answer:0.025576559594663 mole.
Explanation:
Please help!! I'll name you brainliest!!
Answers
Answer:
the awnsers are A and C
Explanation:
because
Can somebody help me please! Help would be much appreciated :))
Answers
Answer:
The first picture shows how the two H athoms finds each other. The second one, how these H athoms start's to form a covalent bond describing it by Lewi's estructure. And the last one, shows how the two athoms of H formed an H2 molecula.
Explanation:
Which processes occur when energy is removed from a substance
Answers
Answer:
Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.
A family pool holds 10,000 gallons of water. How many cubic centimeters is this?
Answers
Answer:
3.785412e+7cm³
Explanation:
Have a nice day.
How do you create a sedimentary
rock?
Help please!!!!15 points
Answers
D. conduction and induction
8. Which phrase describes grounding?
A. charging an object by polarization
B. providing a safe path for electrons to flow
C. changing a substance from a conductor to an insulator
D. using a device that prevents the flow of electric current
Answers
The answer that you are looking for is
Answer:
B
Answer:
D
Explanation:
using a device that prevent the flow of electric current.
This is your answer because it describes it
which one of these is NOT a unit for a reaction rate. 1) g/mL 2) M/min
Answers
G/ml is not a unit of time this the answer
What causes Earth’s major wind patterns?
Question 1 options:
Radiant energy from the sun strikes Earth unevenly.
The density of ocean water changed wind patterns
The latitudes of different areas
The Earth is spinning
Answers
Answer:
A.
Explanation:
The sun unevenly hits the Earth, causing wind to form and move around the poles; never constant.
Answer:
A is correct i just took the quiz and got it right
Explanation:
When using pH paper, the pH of a solution can be determined by looking at the _______ of the paper.
Answers
Colour
Hope this helps
There are 9.88x1023 molecules of O2 available.
a.How many moles of O2?
b. How many grams of CO2 can form?
Answers
Answer:
1.64 moles O₂
Explanation:
Part A:
Remember 1 mole of particles = 6.02 x 10²³ particles
So, the question becomes, how many '6.02 x 10²³'s are there in 9.88 x 10²³ molecules of O₂?
This implies a division of given number of particles by 6.02 x 10²³ particles/mole.
∴moles O₂ = 9.88 x 10²³ molecules O₂ / 6.02 x 10²³ molecules O₂ · mole⁻¹ = 1.64 mole O₂
_______________
Part B needs an equation (usually a combustion of a hydrocarbon).
For the formation of hydrogen iodide, H2(g) + 12(g) - 2HI(g) the value of the
equilibrium constant at 700K is 54.7. If one mole of H2 and one mole of 12 are the
only materials initially present, what will be the equilibrium concentrations of H2,
12, and HI.
Answers
Answer:
t 700 K, the equilibrium constant for the reaction;
H
2(g)
+I
2(g)
⇌2HI
(g)
is 54.8.
If 0.5 mol litre
−1
of HI
(g)
is present at equilibrium at 700 K, what are the concentrations of H
2(g)
and I
2(g)
assuming that we initially started with HI
(g)
and allowed it to reach equilibrium at 700 K.
How many moles are in 1.6g HCl ?
Answers
Answer:
0.0438825768068512
Explanation:
use a calculator online, you wont have to wait
Use the following terms in the same sentence chemical reaction and precipitate
Answers
Answer: Precipitate is a sign that a chemical reaction has occurred.
define sedimentary, metamorphic, igneous
Answers
Answer:
these are all types of rocks
sedimentary are formed through the accumalation of different material from earths surface. Like the grand Canyon!
Metamorphic rocks are formed from heat, preasure, or a combination. Found mostly near tectonic plates meet.
Igneous are molten rock.
Explanation:
Sedimentary- a rock that has formed from sediment deposited by water or air
Metamorphic- a rock that has transformed by heat,pressure,or other natural causes
Igneous- a rock that has been solidified by lava or magma
H2O2 → H2O + O2
This is showing the reaction that we used in elephant’s toothpaste. Write and balance this equation on your own sheet of paper. If 24.53 g of hydrogen peroxide decompose, how many grams of water are produced.
Answers
Answer:
75.47
Explanation:
AS WE CANT WEIGHT AIR THE ANSWER IS CORRECT
How are different ions determined?
Answers
Phosphates are formed when phosphorus reacts with
A. carbon.
B. oxygen.
C. nitrogen.
Answers
Option B is correct. Phosphates are formed when phosphorus reacts with Oxygen
A phosphate group is formed from the bonding of four oxygen atoms to a phosphorous atom. The chemical reaction is as shown:
P + O₄ -> PO₄
P is the symbol of phosphorus
O is the symbol of oxygen
When both elements combine, they form phosphates.
Hence we can conclude that Phosphates are formed when phosphorus reacts with Oxygen
Learn more here: https://brainly.com/question/13652744
9. _____________ have a mass number of 0.
10. Particles found in the nucleus are called ______________________.
11. _____________________________ is when electrons are released by a hot filament.
12. The number of protons and neutrons in an element is called the _______________ number.
13. ____________________ was the first atomic bomb dropped.
14. _________________ would be an example of a spontaneous change to the nucleus.
15. _____________ decay results in the release of two protons and two neutrons.
16. __________________ are particles that would be attracted to a positively charged plate.
17. __________________________ coined the word radioactivity.
18. ____________________________________ is used to produced radioactive isotopes by
forcing nuclear reactions.
19. During __________________, the nucleus of a Uranium 235 atom is split into lighter
elements, neutrons, and energy.
20. _________________ are the fastest form of radiation.
21. The number of protons in an element is called the _______________ number.
22. Irene Curie used ___________________ as the source of alpha particles for her research.
23. Uranium goes through _____________ decay ____________ (a number) times to produce
Plutonium.
24. ________________ is a raw Uranium ore which was central to the discovery of radioactivity.
25. The ____________________ was cited in the letter signed by Einstein as having ore with
high concentrations of U-235.
Answers
Answer:
sheeesh thats a lot
Explanation:
Answer:
9. Neutronium
10. Protons and Neutrons
11. cathode
12. mass
13. Little Boy
14. Radioactive decay
15. Alpha
16. Electrons
17. Marie Curie
18. Nuclear fission
19. fission
20. Gamma
21. atomic
22. aluminum foil
23. beta/ 2
24. X-rays
25. Einstein–Szilárd letter
Why is it true to say that calcium carbonate
has both ionic and covalent bonds? the
Answers
Answer:
Calcium carbonate (CaCO3), essentially, is an ionic compound having the bivalent calcium and carbonate ions.
But the carbonate anion is a polyatomic species. The carbon atom is bonded to all the three oxygen atoms by covalent bonds - two carbon-oxygen single bonds and one carbon-oxygen double bond. Owing to resonance, the three carbon-oxygen bonds are also of equal length in the carbonate anion.
Any salt having a polyatomic ion invariably contains both ionic and covalent bonds.
A container of gas is initially at 0.500 atm and 298 K. What will the pressure be at 398 K?
Answers
Answer:
5
Explanation:
The Beryllium (Be) atom has 4 protons, 4 electrons (2 valence e- ), and 5 neutrons. It is on the 2nd period, so it has two electron shells
Answers
(diagram below)
1. has two electron shells, so draw two rings around the nucleus
2. has 4 electrons, and since the first shell always has two the second shell would have 2 as well (to add up to four). this makes sense, because the description says that Be has 2 valence electrons
3. Draw 4 protons inside the grey circle (the nucleus)
4. Draw 5 neutrons inside the grey circle too (the nucleus)
they don't have to be in any particular order, hope this helps!
Beryllium (Be) atom has 5 neutrons, 4 electrons and 4 protons. It has two electron shells as it is in the second period of the periodic table.
Only two electrons can fit in the first shell, which is the innermost shell. Beryllium has two electrons in its initial shell. There are additionally 2 electrons in the second shell, which is the outermost shell for beryllium. Valence electrons are the moniker for these outermost electrons.
The electron configuration of beryllium is 1s² 2s², where the superscript refers to the number of electrons in each orbital and shell. The two electrons in the 1s orbital of the first shell are denoted by the symbol 1s², while the two electrons in the 2s orbital are denoted by the symbol 2s².
Learn more about electron configuration, here:
https://brainly.com/question/29157546
#SPJ6