What is the source of energy that is released in an exothermic reaction? what absorbs the energy that is released ?
Explain why the following statements are true:
1) All matter is made up of atoms.
2) An electron with a proton equals a neutral charge.
3) All atoms are in constant motion.
please explain using complete sentences and will give brainliest to the best answer
PLEASE EXPLAIN ALL OF THE CHOICES!!!!! THX
Will mark as Brainliest.
Which of the following is an exothermic reaction?
melting ice
dissolving ammonium nitrate in water to cool the water
dissolving sugar in water
condensation
How many grams of He are present in 8.0 L of gas at STP
Sunlight is energy that comes from the sun. How is that energy produced?
A. Molecules break down, releasing chemical energy.
B. Uranium atoms split apart, releasing nuclear energy.
C. Hydrogen atoms fuse together into Helium, releasing nuclear energy
D. Molecules are created, releasing chemical energy
I'm pretty sure its C but I want to get a second opinion.
Answer:
the answer is C
Explanation:
this is the reaction that happens inside the sun: every four Hydrogen Ions fuse together forming on Helium Ione and the difference in mass between the four Hydrogen Ions and the one Helium Ione is converted into nuclear energy.
Both algae and amoeba are in the domain Eukarya. Which of the following characteristics do they most likely share?
They both belong to the plant kingdom.
They both have cells with no nucleus.
They both have cells with membrane-bound organelles.
They both belong to the animal kingdom.
Answer: They both have cells with membrane- bound organelles.
Explanation:
The domain eukarya includes the eukaryotic organisms, which range in diversity from single celled to multicellular. These organisms have cells that have membrane bound organelles, nucleus is present in them. These organisms range from simple to complex life cycles.
Hence, both algae and amoeba which belong to domain eukarya have membrane bound organelles in their cells.
Answer:
C, They both have cells with membrane-bound organelles.
Explanation:
I did the module exam
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which statement describes the role of decomposers in the carbon cycle?
A they release the carbon that remains in the bodies of dead organisms.
B they prevent carbon from escaping into the atmosphere
C they absorb carbon dioxide in the atmosphere
D they change carbon dioxide into a form that organisms can use.
Answer:
Your answer would be A.
Explanation:
I took a quiz with the same exact question
The equation Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) is an example of which type of reaction?
Answer : This is an example of single-displacement reaction.
Explanation :
Single-displacement reaction : It is a type of reaction in which the more reactive metal displaces the least reactive metal from its solution.
It is represented as :
[tex]A+BC\rightarrow AC+B[/tex]
where A is the most reactive metal and BC is the compound in which the B is the least reactive metal which is displaced by the most reactive metal A.
The given balanced reaction is,
[tex]Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)[/tex]
This reaction is an example of single-displacement reaction in which the magnesium metal displaces the hydrogen metal from its solution to give magnesium chloride and hydrogen gas as a product.
Hence, the given reaction is an example of single-displacement reaction.
Why are sound recordings needed to preserve sound information
What evidence do scientists have that Earth has been hit by large objects, like asteroids, in the past? Check all that apply.
Through which of the following processes is carbon directly transferred between living organisms and the environment?
Answer:
The answer is carbon cycle.
Explanation:
The carbon cycle is an important process for living organisms. As plants prepare their food through photosynthesis and is also an important source of fossil fuels for human activities.
Therefore carbon atoms are regenerated again and again in the carbon cycle process. This recycling process takes place between livings and nonliving things in the environment and also within the earth biosphere.
Abundance supply of carbon is necessary to carry out the biological processes. The entire carbon cycle is actually made up of sourced and sinks elements.
How hot or cold is Mercury
What is a physical property of water?
A) liquid at room temperature
B) not flammable
C) pH of 7
D) reacts with sodium
How many milliliters are in 22 mm3?
what is the molecular formula of compound x?
How many moles of BaSO4 are formed if 0.5 moles of Na2 SO4 react with 60 g of BaCl2? Na2 SO4 + BaCl2 → BaSO4 + 2NaCl
Answer: 0.29
Explanation:
[tex]Na_2SO_4+BaCl_2\rightarrow BaSO_4+2NaCl[/tex]
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\textMolar mass}}[/tex]
Putting values in above equation, we get:
[tex]\text{Moles of}BaCl_2}=\frac{60g}{208g/mol}=0.29mol[/tex]
Moles of [tex]Na_2SO_4[/tex] = 0.5 moles
According to stochiometry, 1 mole of [tex]BaCl_2[/tex] reacts with 1 mole of [tex]Na_2SO_4[/tex]
Thus 0.29 moles of [tex]BaCl_2[/tex] will react with 0.29 moles of [tex]Na_2SO_4[/tex]
Thus [tex]BaCl_2[/tex] is the limiting reagent as it limits the formation of products and [tex]Na_2SO_4[/tex] is the excess reagent.
1 mole of [tex]BaCl_2[/tex] produces = 1 mole of [tex]BaSO_4[/tex]
0.29 moles of [tex]BaCl_2[/tex] will produce= 0.29 moles of [tex]BaSO_4[/tex]
HQ5.49 Use standard enthalpies of formation to calculate the standard enthalpy of reaction for the following reaction: 2 H 2 S(g) + 3 O 2 (g) → 2 H 2 O(l) + 2 SO 2 (g) ΔH ∘ rxn
The reactant Zn is an
element
an ionic compound
a molecule
an oxide.
A (n) blank is a vent or fissure in the earths surface through which magma and gases are expelled
Answer:
Volcanoes
Explanation:
The volcanoes are the features on the earth's surface through which the magma comes out along with other gases.
The formation of the volcano is associated with the divergent and the convergent type of plate boundary. Due to this motion and subduction of heavier plates, the plates at greater depth melts and mixes up with the uprising magma. This magma then rises up towards the surface in the over-riding plate, forming volcanoes, from where the magma erupts on the surface forming lava along with the emission of various gases such as carbon dioxide, sulfuric acid, and hydrogen sulfate.
What is a type of mineral
Solar Nebula definition
The solar nebula is the original rotating cloud of gas and dust that formed the solar system, which under its gravity collapsed to form the Sun at its center, with the remaining materials eventually forming the planets and other celestial bodies.
Explanation:Definition of Solar Nebula
The term solar nebula refers to the vast, rotating cloud of gas and dust from which the solar system was formed about 4.5 billion years ago. This flattened cloud of cosmic raw material is the precursor to the sun and the planets in our solar system. As gravity caused the solar nebula to collapse, it became hotter and denser at its center, forming the Sun. The remaining material then coalesced into the planets, moons, and other bodies that orbit the Sun. Similarly, the Orion Nebula is a current example of a stellar nursery, where new stars and planets are being formed, likened to a contemporary analog of our own early solar nebula. Unlike the solar nebula which has completed its lifecycle, many young stellar nebulas or circumstellar disks can be observed today, reflecting various stages in the planetary formation process.
how many liters of laughing gas are in 0.98 moles stp
3H2 + N2 ===> 2NH3
GIVEN: 44.8 L of H2 at STP.
answer: mols of N2.
By applying ideal gas equation,
[tex]P\times V=n\times R\times T[\tex]
Where, P= pressure of gas
V=volume of gas
R=Gas constant
n=Number of moles of gas
T=Temperature
At STP, each gas has a defined value of pressure, volume and temperature.
P= 1 atm
R=0.0821 L atm mol⁻¹ K⁻¹
T= 0°C or 273 K
Putting all the values in the equation will give:
[tex]1\times V=0.98\times 0.0821\times 273[\tex]
V = 22 L
So the answer is 22 L.
Can you please answer number 8 thanks
which of these are the largest? asteroids, comets, meteors, or are they all the same size?
Answer:
most likly comets but could be asteroids
Explanation:
hope it helps sorry the there wrong depeest apologise thanks
Carbohydrates are made up of three of the six major molecules found in living things. The general chemical formula for a carbohydrate is CH2O. Which elements combine to make a carbohydrate? Explain why the answer is correct. A. copper and colbat B. chlorine and oxigen C. carbon, helium and oxygen D. carbon, hydrogen and oxygen. Please answer ASAP
the gas left in an used aerosol can is at a pressure of 103 kPa at 25 degrees celsius if this can be thrown into fire what is the pressure of gas when it's temperature reaches 928 degrees Celsius
Answer:
415.11 kPa
Explanation:
The gas law to be applied here is Gay-Lussac's law. Gay-Lussac's law states that the pressure of a given mass of gas is directly proportional to it's temperature (in kelvin) provided volume remains constant.
The formula for the law is
P₁/T₁ = P₂/T₂
where P₁ is initial pressure (103 kPa)
P₂ is final pressure (unknown)
T₁ is initial temperature (25°C + 273 = 298K)
T₂ is final temperature (928°C + 273 = 1201K)
From the formula,
103/298 = P₂/1201
P₂ = [tex]\frac{103 * 1201}{298}[/tex]
P₂ = 415.11 kPa
415.11 kPa is the pressure of the gas when it temperature reaches 928°C.
Earth's path around the sun is _____.
a) eliptical
b) circular
c)random
d) triangular
Helpp pleaseeeeeeeee
Answer:
The Sarah will arrive at 5.00 P.M..
Explanation:
Distance covered by Sarah = D = 30 miles
Time taken by Sarah to travel 30 miles = T
Speed by which Sarah cycling = S = 10 mile/hr
[tex]Speed=\frac{Distance}{Time}[/tex]
[tex]Time = \frac{Distance}{Speed}[/tex]
[tex]T=\frac{30 mile}{10 mile/hr}=3 hr[/tex]
Sarah will reach her grandmother's house in 3 hours.
If she leaves the home at 2.00 P.M. ,then she will reach at her grandmother's house by 5.00 P.M..
How will the arrangement of salt particles most likely change?
Answer:
Salt particles will diffuse and towards where it is less that is left !!
so your answer is A !! left through diffusion !!
Explanation:
As part of a science experiment, Jose did a test for starch on a slice of apple and a slice of potato. The yellow-orange iodine solution stayed the same color when it was put on the apple, but it became black on the potato. Why did the iodine solution change color on the potato? A. The iodine evaporated into a gas. B. The iodine mixed with the colors of the potato so it looked black. C. The iodine burned the potato and turned it to ash. D. The iodine reacted with the potato to form a new substance.
Answer:
The iodine reacted with the potato to form a new substance.
Explanation: