Answer:
2d
Explanation:
2d nije moguće. moguće je samo 3d do 7d. provjeri periodni sustav!
ako ne razumiješ, obrati mi pažnju
A fuel was burned for 5 min, increasing the temperature of 10.0 g of water with a density of 1.00 g/ml by 9.0 oC. The fuel released _____ ca
The fuel released 90 calories of heat.
Let suppose that water experiments an entirely sensible heating. Hence, the heat released by the fuel is equal to the heat absorbed by the water because of principle of energy conservation. The heat released by the fuel is expressed by the following formula:
[tex]Q = m\cdot c \cdot \Delta T[/tex] (1)
Where:
[tex]m[/tex] - Mass of the sample, in grams.[tex]c[/tex] - Specific heat of water, in calories per gram-degree Celsius.[tex]\Delta T[/tex] - Temperature change, in degrees Celsius.If we know that [tex]m = 10\,g[/tex], [tex]c = 1\,\frac{cal}{g\cdot ^{\circ}C}[/tex] and [tex]\Delta T = 9\,^{\circ}C[/tex], then the heat released by the fuel is:
[tex]Q = (10\,g)\cdot \left(1\,\frac{cal}{g\cdot ^{\circ}C} \right)\cdot (9\,^{\circ}C)[/tex]
The fuel released 90 calories of heat.
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The chemical symbol for helium is H
Answer:No, it is He
Mark me brainlieist
plate movements on earths crust creates?
Answer:
Earthquakes and Volcanos?
Explanation:
I'm a little unsure about my answer, however, I do have some insight backing my answer. Earthquakes happen when the plate tectonics shift into each other, causing them to collide. Then for volcanos, the plate tectonics shift from convection current and molten rock from the mantle come to the surface.
I want help solving this question
Answer:
1.04 is the amount he should take every day but it is not in the options, so estimate to the nearest value.
Explanation:
It is Option C If C is 1.0.
it is probably option A as it is the closest to 1.04.
you must clarify the question And options more.
World War 2 was a
war.
continental
civil
global
Pls helppppp
Answer:
so slaves can have there own rights,so the states can still be united and it would be backwards to only have 7 8 9 states
Explanation: please mark me as brainlist
A chemist carefully measures the amount of heat needed to raise the temperature of a 1.05 kg sample of a pure substance from 1.9 °C to 19.7 °C. The
experiment shows that 4.39 kJ of heat are needed. What can the chemist report for the specific heat capacity of the substance? Be sure your answer has the
correct number of significant digits.
х
?
Now
[tex]\\ \sf\longmapsto Q=mc\Delta T[/tex]
[tex]\\ \sf\longmapsto c=\dfrac{Q}{m\Delta T}[/tex]
[tex]\\ \sf\longmapsto c=\dfrac{4390}{1.95(17.8)}[/tex]
[tex]\\ \sf\longmapsto c=\dfrac{4390}{18.69}[/tex]
[tex]\\ \sf\longmapsto c=234.8J/kg°C[/tex]
what group of elemets form sugar
Answer:
Sugar is a molecule made up of 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms that is white in color. It is formed of the elements carbon, hydrogen, and oxygen (C12H22O11). Sugar is a carbohydrate, which means it is made up of these three components like all other molecules.
Explanation:
Hope it helps:)
Which products are the result of a neutralization reaction? (1 point)
A)hydrogen and hydroxide
B)water and a salt
C)a titrant and an analyte
D)an acid and a base
Answer:
B) water and salt is the result of neutralization reaction
Water and salts are the product of a neutralization reaction.
NEUTRALIZATION REACTION:
Neutralization reaction is a type of reaction between an acid and a base to form a salt and water. In a neutralization reaction, the hydrogen ion (H+) and hydroxyl ion (OH-) are released from the acid and base respectively and are combined to form water. An example is the reaction between hydrochloric acid (HCl) as an acid and sodium hydroxide (NaOH) as a base to form sodium chloride (NaCl) as salt and water (H2O). Therefore, water and salts are the product of a neutralization reaction.Learn more at: https://brainly.com/question/20038776?referrer=searchResults
You push on an object for 3 seconds. During those 3 seconds, the object 10 points
moves 0.65 m. After you stop pushing, the object moves another 0.20 m.
Which distance should you use to calculate work?*
A 0.20 m
B 0.65 m
C 0.85 m
Answer:
C.) 0.85m
Explanation:
If you moved it for 3 seconds and it went 0.65m then continued to move for another 0.20m you would just add the two numbers together.
0.65+0.20=0.85m
The Lewis dot model of a molecule (Phosphorous Chloride) is shown.
A. The electronegativity difference between phosphorous and chlorine is greater than 1.7.
B. Each chlorine has three non-bonded pairs and one bonded pair of electrons.
C.Phosphorous has three non-bonded pairs and one bonded pair of electrons.
D.Phosphorous has three valence electrons in the outermost energy level.
Answer:
B
Explanation:
Each chlorine atom has 7 valence electrons. One from each of the Chlorine atoms bonded with one Phosphorous atom, leaving the rest of the pairs, 3 pairs each adding up to six, unbonded
The Lewis dot model of a molecule ( Phosphorous Chloride ) is each chlorine has three non-bonded pairs and one bonded pair of electrons. Therefore, option B is correct.
What is lewis model ?Lewis' model demonstrated that, as long as the opportunity cost of labor to the capitalist sector is low, low wages and poverty will continue to exist in a labor surplus economy.
The Richard Lewis model of cultural diversity proposes that all cultures can be divided into three categories: linear-active, multi-active, and reactive. The Lewis model is a triangle made up of these three distinctly different cultural groupings.
The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
Thus, option B is correct.
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4.25 x 10^24 atoms N
Answer:4.25 x 10^24 atoms N
Explanation:
all you have to do is the equatequation in the calulator and there you go.
What is the force required to pull a spring 0.5m if the spring constant is -3N/m
Answer:i think its right because i had this one before
2u+3u+8u=0
Hello please please help me with this question please help PLEASE PLEASE HELP
errrrrrrrrrrrrreeeeeeeeeeeerrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
PLS HELP!
For which properties can a student design an investigation of the electrostatic forces between molecules in a substance?
A. melting point and boiling point, but not surface tension and vapor pressure
B. surface tension and vapor pressure, but not melting point and boiling point
C. boiling point, but not melting point, surface tension, or vapor pressure
D. melting point, boiling point, surface tension, and vapor pressure
To determine the melting point of ice, which procedure would best help measure the melting point temperature?
A. Mix ice with water until equilibrium is reached but some ice remains that is no longer melting.
B. Mix ice with water until equilibrium is reached but some ice remains that is still melting.
C. Mix ice with water until just before equilibrium is reached but some ice remains that is no longer melting.
D. Mix ice with water until just before equilibrium is reached but some ice remains that is still melting.
Answer:
1. D: melting point, boiling point, surface tension, and vapor pressure
2. I’m not too sure about the second one. Maybe D Mix ice with water until just before equilibrium is reached but some ice remains that is still melting. However I am unsure. So do not take my word for it
Explanation:
The properties that a student can design an investigation of the electrostatic forces between molecules in a substance are melting point, boiling point, surface tension, and vapor pressure.
To determine the melting point of ice, which procedure would best help measure the melting point temperature is to Mix ice with water until equilibrium is reached but some ice remains that is still melting.
Intermolecular forces are regarded as the forces of attraction or repulsion that exist or act between close particles of atoms, molecules, or ions.
The slow heating rate at the melting point is important in order to get an the measurement.
When an individual heat ice, its temperature often rises, but as soon as the ice starts to melt, the temperature stays constant until all the ice has melted.
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Which of the following statements is true?
Select one:
The molecules of liquid water have less kinetic energy than those of water
vapor
The molecules of liquid water interact with one another, and those of water
vapor do not
The molecules of liquid water and water vapor have a different atomic
composition
The molecules of liquid water are bigger than the molecules of water vapor.
What is the difference between agar and pectin?
Answer:
Both come from vegetable sources; pectin is a soluble fiber found in plants, while agar comes from various species of algae. Chemically, they're closely related, and both consist of long strands of sugar molecules.
Explanation:
Describe how cooking marshmallows over a campfire could demonstrate all three forms of heat transfer.
ecuación iónica de
Ba(CIO4)2 y K2SO4.
i don't remember yeah yosj
An alkyne with the molecular formula C4H6 was reduced with sodium (Na) in liquid ammonia (NH3). Ozonolysis of the resulting alkene afforded only one aldehyde product. What is the IUPAC name of the alkene that was formed by reduction of the starting alkyne
Since the ozonolysis of the resulting alkene gave only one aldehyde, the starting material is but -2- yne.
Alkynes are a functional group characterized by the presence of the carbon - carbon triple bond. When an alkyne is reacted with sodium (Na) in liquid ammonia (NH3), the alkyne is converted to an alkene.
Alkenes undergo ozonolysis in which ozone is added across the double bond to form an ozonide. In the case, ozonolysis of the resulting alkene afforded only one aldehyde product. The alkyne starting material is but -2- yne.
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which turkey (15lb or 25lb) will thaw faster and why?
Answer:
15lb
Explanation:
A 15lb pound of turkey will thaw faster compared to 25lb because it's not only smaller but the weight of the turkey affects how temperature circulates throughout.
Hope this helps :)
The turkey weighing 15 lb will thaw faster as it has lesser mass, and required less time.
Thawing has been the process of warming up the substance for converting freezed to a soft liquid and solid. The time required for thawing has been proportional to the energy required to change the substance state.
The turkey has been given of weight 15 lb and 25 lb. The more the weight, there has been more energy has been required for thawing.
Thus, 15 lb turkey will thaw faster as compared to the 25 lb turkey.
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One significant difference between gases and liquids is that:
A) a gas assumes the shape of its container, a liquid does not
B) a gas is made up of molecules, a liquid is not
C) a gas assumes the volume of its container, a liquid does not
D) None of all
E) a gas is always a mixture, a liquid is not
F) a gas may consist of both elements and compounds, a liquid may not
Answer:
A
Explanation:
all the other answers are wrong or not applicable. hope this helps :)
What is the volume percentage of 18 L of isopropanol in 45 L of water?
The volume percentage of 18 L of isopropanol in 45 L of water is 28.57%
Total solution = volume of water + volume of isopropanol
Total solution = 18L + 45L
Total solution = 63L
Volume of isopropanol = 18L
% volume of 18L isopropanol = 18/63 * 100
% volume of 18L isopropanol = 1800/63
% volume of 18L isopropanol = 28.57%
Hence the volume percentage of 18 L of isopropanol in 45 L of water is 28.57%
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What is the daily functions of the Stomach and Intestine?
I need the correct answers now please!!
Answer
Your stomach is a muscular organ that digests food. It is part of your gastrointestinal (GI) tract. When your stomach receives food, it contracts and produces acids and enzymes that break down food. When your stomach has broken down food, it passes it to your small intestine.
Explanation:
Can you guys help me answer this ?
Answer:
the picture is kinda blurry
Explanation:
3. When Group 2 elements form ions, they
A. gain two electrons
B. lose two electrons
C. gain two protons
D. lose two protons
Answer:
don't understand make it clear
tu sabias que existe el automovil que funciona solo con agua y hay otro que solo funciona con h2? pero lastimosamente estados unidos matò al creador para que no quebraran las petroleras con sus intereses
Dios mío, vaya, eso es una locura, no lo sabía, pero gracias por la información. :)
Please help asap!!!!!!!
Answer:
30
Explanation:
What is the charge of the ion formed when nitrogen obeys the octet rule?
The octet rule is the understanding that most atoms seek to gain stability in their outer most energy level by filling the s and p orbitals of the highest energy level with eight electrons.
Nitrogen has an electron configuration of 1s²2s²2p³ this means that nitrogen has five valence electrons 2s²2p³ .
Nitrogen seeks out three additional electrons to fill the p orbital and gain the stability of a noble gas, 1s²2s²2p⁶ .
However, now nitrogen has 10 electrons and only 7 protons making it a -3 charge anion
N−³.
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is
a.kerosene
b.air
c.alcohol
d.petrol
(pls give answer fast)
Answer:
air is the option so yeah it's right
compare how the water particles in the pot are behaving to how the water particles in the steam above the pot are behaving.
Answer: If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapor as it gets warmer.
The water particles in a pot of boiling water are behaving very differently from the water particles in the steam above the pot.
The water particles in the pot are tightly packed together. They are constantly moving, but they are not free to move around as much as the water particles in the steam.
The water particles in the steam are much farther apart. They are also moving much faster than the water particles in the pot. This is because the steam has been heated to the boiling point, which means that the water molecules have enough energy to escape from the liquid state and become a gas.
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