Which equation represents the standard enthalpy change of formation of water .....
1. Which equation represents the standard enthalpy change of formation of water .....
Jawaban:
equation represents the standard enthalpy change of formation of water
is 2H2(g)+O2(g)→2H2O(l)
2. 4) Which of the following represents all the possible values of x that satisfy the equation below? X X x − 3 2x 2 *
Nilai x memenuhi persamaan yaitu x = 0 atau x = 4. Soal ini berkaitan dengan materi mencari nilai x dari suatu persamaan.
Penjelasan dengan langkah-langkahDiketahui :
Koreksi soal, mungkin maksud Anda persamaan x/(x-3) = 2x/2
Ditanyakan :
Solusi dari permasalahan tersebut
Jawab :
Langkah 1
x / (x - 3) = 2x / 2
Jika dipindah ruas akan menjadi :
x . 2 = 2x . (x – 3)
Selanjutnya kita lakukan operasi
2x = [tex]2x^{2}[/tex] – 6x
0 = [tex]2x^{2}[/tex] – 8x
0 = 2x (x – 4)
x = 0 atau x = 4
Jadi, x yang memenuhi adalah x = 0 atau x = 4
Pelajari Lebih LanjutMateri tentang mencari nilai x dari suatu persamaan brainly.co.id/tugas/26215307
#BelajarBersamaBrainly #SPJ1
3. which graph represents the solution of the inequality -12x > 36
Jawaban:
the working and the answer are shown in the pic.
semangat belajar;))
4. 1. The local service center advertises that it charges a flat fee of $50 plus $8 per mile to tow a vehicle. Write an equation that represents the total cost (C) of a service for m miles of towing. 2. A fitness club opens with 80 members. Each month the membership increases by 15 members. Which equation represents the relationship between the number of months the club has been opened, x, and the total fitness club membership, y?
Jawaban:
i dont kbow sorry u question so hard to me sorry
5. Which of the following word is spelled correctly? Milege Expectant Oversite Aknowledge
Jawaban:
Oversite dan Expectant.
Penjelasan:
Milege seharusnya Mileage dan Aknowledge seharusnya acknowledge.
Semoga membantu, mohon kalau bisa brainliest answer.
6. Ionic equation between calcium carbonate and an acid
Jawaban:
CaCO3 + HCl - Calcium Carbonate + Hydrochloric Acid.
Jawaban:
CaCO₃ (s) + 2HCl (aq) ---> CaCl₂ (aq) + H₂O (l) + CO₂ (g)
Discussion
The chemical formula for calcium carbonate is CaCO₃ which is formed from Ca²⁺ ions and CO₃²⁻ ions. Meanwhile, hydrochloric acid solution has the chemical formula HCl.
Correction questions
The correct reaction product is a solution of chloride, water and carbon dioxide gas, according to the following equation:
CaCO₃ (s) + HCl ---> CaCl₂ + H₂O + CO₂ (not yet equal)
Balance the Cl atoms
CaCO₃ (s) + 2HCl (aq) ---> CaCl₂ (aq) + H₂O (l) + CO₂ (g) (already equivalent)
While the reaction that produces sodium sulfate and water is:
2NaOH (aq) + H₂SO₄ (aq) ---> Na₂SO₄ (aq) + 2H₂O (l)
7. What is the equation of axis of symmetry of the given quadratic equation? * y = x2 – 8x - 9
Jawaban:
x = 4
Penjelasan dengan langkah-langkah:
x = -b/2a
= -(-8)/2(1)
= 4
Jawaban:
x = 4
Penjelasan dengan langkah-langkah:
semoga membantu:)
8. 5. Which part of tongkonan represents human'sworld?The outside of the house.b. The inside of the house.C. The space under the fioor.d. The yard of the house.The middle of the building.
Jawaban:
b.The inside of the house
siisiahshshdhhshsgshvdgdhshbxhxhbxjxhxjxjjx
9. Which of the following statements correctly describes the motion of the car shown by the velocity time graph
Mana dari pernyataan-pernyataan berikut benar menjelaskan gerakan mobil yang ditunjukkan oleh kecepatan waktu grafik.
10. word equation for reaction between calcium and water
Jawaban:
Jawaban ada di gambar ya
Penjelasan:
Semoga membantu dan jadikan jawaban tercerdas ya :)
11. Apply the aims of a diary, and choose which one of these notes best represents the characteristics of a diary.
Terjemahan
Inggris - Indonesia
Inggris :
Apply the aims of a diary, and choose which one of these notes best represents the characteristics of a diary.
Indonesia :
Terapkan tujuan buku harian, dan pilihlah buku harian mana.
12. Which of the following statements best represents a difference between short-run and long-run cost?
manakah dari pernyataan-pernyataan berikut yang paling mewakili perbedaan antara jangka pendek dan jangka panjang?
mungkin yang kmu maksud translate annya ya?
13. which graph represents the solution of the inequality -12x > 36
Jawaban:
the working and the answer are shown in the pic.
semangat belajar;))
14. find the equation of the straight line which has a gradient of 2 and which passes through the point (2,1).
y-y1=m(x-x1)
y-1=2(x-2)
y=2x-4+1
y=2x-3
mungkin gitu(?)
15. Which of the force diagrams in the figure correctly displays all of the horizontal forces exerted on the cart by the surrounding air?
Jawaban:
The force that propels a rocket is that the force provided by _______.
the expelled gas pushing on the rocket
When hitting a tennis ball with your racquet, the force on the ball has the same magnitude as the force on the _______.
racquet
A Volkswagen bug and a Volvo truck have a head-on collision. Which statement is true?
The magnitudes of both forces are the same.
A heavy crate is attached to the wall by a light rope, as shown in the figure. Another rope hangs off the opposite edge of the box. If you slowly increase the force on the free rope by pulling on it in a horizontal direction, which rope will break? Ignore friction and the mass of the ropes.
Both ropes are equally likely to break.
(Since the attached rope doesn't have to support any weight (as it did in the vertical case), the tension is the same in both ropes.)
Earth pulls on Moon. What is the reaction?
Moon pulls on Earth.
Which force is greater, the Earth's pull on the Moon, or the Moon's pull on the Earth?
Both pulls are the same
Since the Moon pulling on the Earth and the Earth pulling on the Moon are a reaction pair, the strengths of the two forces must be equal to each other.
If the cannon's recoil is the result of an equal and opposite reaction, why is the cannon's acceleration lower than the shell's acceleration?
The cannon has more mass than the shell.
(Since the cannon has more mass than the shell, it will have a lower acceleration because both objects experience the force. This can be understood from Newton's second law (a=F/m).)
Since movement of an object or system requires that a net force be applied to it, how can this occur if all action forces have opposite and equal reaction forces?
The action force doesn't act on the same object as the reaction force.
(Newton's second law can be applied to each of the objects. In fact, this explains why the two objects can have different resulting accelerations.)
n Lesson 3 of the tutorial, the horse is pulling a cart. What allows the horse to accelerate forward even though the cart is pulling back on the horse?
The force of friction the ground exerts on the horse is larger than the force the cart is pulling back on the horse.
(The net force exerted on the horse must be to the right if the horse accelerates to the right. The only two horizontal forces acting on the horse are friction (pushing forward) and the cart (pulling backward), so the friction force must be stronger.)
Which of the following is NOT a statement or consequence of Newton's third law?
There can never be only one force acting on an object
(Newton's third law doesn't specify how many forces can act on any one object (it just states that each of the forces will have a reaction force acting on other objects).)
Penjelasan:
sorry if wrong or don't understand
16. find the equation of the circle whose radius is 5 which touches the circle x² + y² - 2x -4x -20 = 0
Penjelasan dengan langkah-langkah:
x² + y² - 2x -4y -20 = 0
cari titik pusatnya dulu
x = –(–2)/2 = 1
y = –(–4)/2 = 2
jadi pusatnya (1, 2)
dengan r=5
kita cari titik potongnya
dengan :
(a+1)/2 = 5
a + 1 = 2(5)
a = 10-1
a = 9
(b+2)/2 = 5
b+2 = 2(5)
b = 10-2
b = 8
Persamaannya menjadi :
(x - a)² + (y - b)² = r²
(x - 9)² + (y - 8)² = 5²
x² - 18x + y² - 16y + (-9)² + (-8)² - 5² = 0
x² + y² - 18x - 16y + 81 + 64 - 25 = 0
x² + y² - 18x - 16y + 120 = 017. Let y+2x=3 be the equation of the line which meets the curve 2xsquare -3xy=14. Find the coordinates of the points of intersection of the line and the curve.
the intersect points are (-7/8 , 19/4) and (2,-1)
18. The recommended daily calcium intake for a 20-year-old is 1,000 milligrams (mg). One cup of milk contains 299 mg of calcium and one cup of juice contains 261 mg of calcium. Which of the following inequalities represents the possible number of cups of milk m and cups of juice j a 20-year-old could drink in a day to meet or exceed the recommended daily calcium intake from these drinks alone?
Jawaban:
maaf isengg
Penjelasan dengan langkah-langkah:
maaf yaaaa maaffff
19. Which formula represents the empirical formula of a compound? A.H202 B.C6H12 c. C2H4 D.CH4O
Jawaban:
b.c6h12
Penjelasan:
maaf kalo salah
20. Which of the following represents the number two tenths in decimal form?a. 0.20000 c. 0.002000b. 0.40000d. 2.00000
Jawaban:
A: two tenths is equal to zero point two
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