Answer:
Explained below
Explanation:
When we heat a liquid, what happens is that the molecules of the liquid will absorb heat and thus develop kinetic energy that will make them move faster.
Now, as the liquid begins to boil, bubbles of will be formed inside the liquid and then rises to the surface. Now, when the temperature of the reaches 100°C which is the boiling point of a liquid, the molecules at the top of the liquid begin to change to gaseous state and escape in form of vapour.
which of the following chemical equation shows the formation of sodium hydroxide (NaOH) and hydrogen gas (H2)
from the reaction of solid sodium (Na) and water (H2O)
Answer:
Explanation: reaction is 2 Na(s) + 2 H2O (l) ⇒ 2 NaOH (aq) + H2(g)
Answer:look at the picture below
Explanation:
NEED HELP ANSWERING THIS QUESTION
I-Ö-I I--I.
I-U-I •I-O-I.
I-Ö-I
B.
D.
Which is the correct Lewis structure for ethylene, C2H4?
.
I-0-I I-0-I
I.-O-I
II
E.
I-U-I
エーローエ
OA. A
OB. B
Ос. с
OD. D
A.
Answer:
I think the answer is A.
please give thanks if it helps
and sorry if it doesn't help.
HELP ME!!! Is it right? Or wrong
Your bond Line notation is missing a carbon.
What is a control?
a variable or variables that you must keep constant during an experiment
a variable or variables that you manipulate during an experiment
a variable or variables for which you cannot account
a variable or variables that change with the independent variable
Answer:
a is the answer
please mark it brainliest
Answer:
A control variable (or scientific constant) in scientific experimentation is an experimental element which is constant and unchanged throughout the course of the investigation.
Explanation:
Which of these are the starting materials for cellular respiration?
a. Carbon dioxide and water
b. oxygen and sugar
c. Water and sugar
d. Water and oxygen
Answer:
the material will be water and oxygen
weak orange juice is an example of
Answer:
Orange Juice itself is very acidic with a pH of 3. One main component which provides the vitamin C in the orange is citric acid. Citric Acid is a weak acid (C6H8O7), and weak acids are only partially ionized in solutions such as water.
Explanation:
What volume in milliliters of H20 you need during preparation of 100 milliliters of 14.00 M H2SO4 solution starting with bottle of 17.5 M H2SO4? (Round your answer to closest integer)
Answer:
20 mL
Explanation:
We can determine the required volume of the concentrated (17.5 M) H₂SO₄ solution by using the C₁V₁=C₂V₂ formula:
17.5 M * V₁ = 14.00 M* 100 mLV₁ = 80 mLAs out of the 100 mL of the final solution, 80 mL are from the concentrated H₂SO₄ solution, the remaining 20 mL are of water (H₂O).
Answer meeeeeeeeeeee
I need help with this because it's easy for you guys but I don't understand it
Answer:
from nitrogen fixation in plants, lightning and bacteria
Explanation:
Does a radio have electrical and mechanical energy
Answer:
Electrical
Explanation:
Please help! Due today!
Answer:
five(5) of them
sorry if I'm wrong
All elements in Group 18 are called________________ _______________ and are ______________, which means they don’t readily react with other elements.
Answer:
All elements in Group 18 are called noble gases and are nonreactive which means they don’t readily react with other elements.
Explanation:
As NH4Cl dissolves in water, and cools the solution,
a. delta H is negative, and delta S is negative
b. delta H is positive, and delta S is negative
c. delta H is negative, and delta S is positive
d. delta H is positive, and delta S is positive
Answer:
d. delta H is positive, and delta S is positive
Explanation:
The process of dissolution of NH4Cl is:
NH4Cl(s) → NH4+(aq) + Cl-(aq)
As the solution is cooled, the process is absorbing energy, that means ΔH > 0. (ΔH < 0 when the heat is released).
As there are produced 2 ions from 1 solid molecule, the disorder is increasing and ΔS > 0
The right answer is:
d. delta H is positive, and delta S is positiveWhich of the following statements is true regarding soundwaves?
a. Soundwaves travel as longitudinal or transverse waves depending on the medium they’re traveling through.
b. Soundwaves travel as transverse waves only.
c. Soundwaves travel as longitudinal or transverse waves depending on the temperature of the medium.
d. Soundwaves travel as longitudinal waves only.
Answer: Soundwaves travel as longitudinal or transverse waves depending on the temperature of the medium.
Explanation: i think its C
2. Why is it difficult for us to go up in a mountain than go down?
A We are moving against gravity
B. We are pulled by the wind
C. We are moving towards gravity.
D. None of the above
Farth
help
Answer:
We are moving against gravity
Plzzzzz help... What causes specific lines to appear in a line spectrum?
Answer:
Spectral lines are produced by transitions of electrons within atoms or ions. As the electrons move closer to or farther from the nucleus of an atom (or of an ion), energy in the form of light (or other radiation) is emitted or absorbed.…
Explanation:
Specific lines appear in a line spectrum because produced by transitions of electrons within atoms or ions.
What are spectral lines?Spectral lines are produced when the electrons undergoes transitions within atoms or ions. When the electrons move far or near to nucleus of any atom, radiation of particular wavelength is emitted or absorbed.
These emitted light is represented as they are moving from one state to the another.
Thus, specific lines appear in a line spectrum because produced by transitions of electrons within atoms or ions.
Learn more about spectral lines.
https://brainly.com/question/27494244
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Which best describes valence electrons?
A. all the electrons in an atom
B. the electrons closest to the nucleus
C. the electrons in the outermost orbital
How many miles of N are in 0.179g of N2O?
Answer:
8.14x10⁻³ moles of N
Explanation:
In order to solve this problem first we convert 0.179 grams of N₂O into moles, using its molar mass:
0.179 g ÷ 44 g/mol = 4.07x10⁻³ mol N₂OThen we convert N₂O moles into N moles, using the data given by the compound's formula (that there are two N moles per N₂O mol):
4.07x10⁻³ mol N₂O * [tex]\frac{2molN}{1molN_2O}[/tex] = 8.14x10⁻³ mol NTake a look at the following chemical equation. Complete the following: balance the equation, explain how the conversation of matter supports your answer, and identify the type of reaction.
Answer:
2 NaOH + H₂SO₄ ⇒ Na₂SO₄ + H₂O
We can see that Lavoisier's law of conservation of matter is obeyed because we have the same type and amount of elements on both sides of the equation.
Neutralization reaction.
Explanation:
Let's consider the following unbalanced equation. This is a neutralization reaction.
NaOH + H₂SO₄ ⇒ Na₂SO₄ + H₂O
First, we will balance Na atoms by multiplying NaOH by 2.
2 NaOH + H₂SO₄ ⇒ Na₂SO₄ + H₂O
Then, we get the balanced equation by multiplying H₂O by 2.
2 NaOH + H₂SO₄ ⇒ Na₂SO₄ + H₂O
We can see that Lavoisier's law of conservation of matter is obeyed because we have the same type and amount of elements on both sides of the equation.
Use the drop-down menus to answer the questions.
What would be a reasonable value for the vapor pressure of 1-heptene at 100°C?
Answer:
800 mm Hg
Explanation:
I took the class
Answer:
Use the drop-down menus to answer the questions.
What would be a reasonable value for the vapor pressure of 1-heptene at 100°C?
✔ 800 mm Hg
Does respiratory happens in the lungs true or false?
Answer:
True
Explanation:
Answer:
True
Explanation:
the lungs is a part of respiratory system, so it is true; its main job is to remove Co2 from your body and bring in fresh air
Which best identifies the function of fruits?
a. Fruits contain seeds that will develop into new plants
b. Fruits save and protect seeds for fertilization
c. Fruits give the plant food.
d. Fruits transfer pollen
Explanation:
i am not sure but i think is C
At what temperature does 100g
fertiliser dissolve in 100ml of water
Answer:
please give me brainlist and follow
Explanation:
About 110 g . Explanation: Your tool of choice here will be the solubility graph for potassium nitrate, KNO3 , in water.
All gases at the same temperature have the same kinetic energy; however, this does not necessarily mean the gas molecules move at the same speed. At 25°C, which gas will have move the slowest?
Kr (molar mass=83.80 g/mol)
He (molar mass = 4.00 g/mol)
Ne (molar mass = 20.18 g/mol)
Ar (molar mass= 39.95 g/mol)
Answer:
Kr (molar mass=83.80 g/mol)
Explanation:
as it is the heaviest i think
The curved surface in the night sky on which stars appear to be fixed is called the
orbital path
celestial sphere
ecliptic plane
star chart
Answer:
Celestial Sphere
Explanation:
When you look at the night sky, the stars appear to be fixed to an apparently curved surface above the observer. This surface is called the celestial sphere.
plz brainiest, thx, hope this helped
calculate the relative molecular mass of Ma(HCO3)2
Answer:I believe you mean Mg(HCO3)2. Since I have never heard of the element MA. but if you are calculating using mg(HCO3)2 your molar mass/ molecular mass will be 146.3387
Explanation:
Even when the temperature of a pan of water is less than the boiling point, water still evaporates. This is because
a. the speeds of individual molecules varies
b. conservation of energy
c. of convection
d. radiation
Si-4) AN= 14 AM= 28
e= n=
Answer:
have a good day
Explanation:
During a lunar eclipse on Earth what would an observer
on the Moon see?
Answer:
They would see the moon turn red.
Explanation:
A gas has a volume of 10 L at 200 K and a pressure of 1.5 atm . What would the volume of the gas be at 300 K and 2atm of pressure ?
Answer:
hi
Explanation:
I'm just figuring this out what am I doing