Answer:
IT îs said that the cell separarea water into its constituent elemente hidrogen and oxigen . Turn the hidrogen will ne burned ți obtain energy nu restoring the water molecules.
What type of solution do you create if you put 50g of NH4Cl in 100g of water at 70 degrees C
Answer:
hi
Explanation:
Why burning of fuel is a chemical change give 5 reasons to support your answer
Answer:
Explanation:
1. New substances such as carbondioxide and water is formed.
2. There is evolution of gas bubbles. Gases are released.
3. There is either the absorption of energy or release of energy in form of light and energy.
4. The reaction is irreversible i.e it cannot be reversed, it is permanent once the reaction take place.
5. There is a change in both odor and smell.
A chemical change is a change where new substances are formed due to changes in the properties.
Within a period, the nuclear charge increases as you move from left to right across the
periodic table. Again, in one sentence explain the reason for this increase. Be sure to
use your own words. PLEASE HELP
Answer:
The answer is Ionization energy.
Explanation:
Ionization Energy. The ionization energy tends to increase as one moves from left to right across a given period or up a group in the periodic table.
1. How would you describe a wave to someone
who has never seen one before?
Answer:
I would describe it as a amount of water that builds up and jumps up into the air and then splashes back down into the water like it was never there.
Explanation:
Draw electron-dot structure of cyclohexane.*
Answer:
Draw the example below
Hope this helps
Hope it helps.
If you have any query, feel free to ask.
Is freezing point depression a colligative property?
Answer:
Yes it is a colligative Property
Explanation:
There is freezing point depression, boiling point elevation, Osmotic Pressure, Vapor Pressure Lowering
3 A partial desert food web is shown.
Coyote
Jackrabbit
€
Kangaroo
rat
Seeds
Shrubs
Which type of organism is missing from this food web?
A. Decomposer
B. Predator
C. Consumer
D. Producer
ОА
In cellular respiration, living things use sugar to produce energy.
True or false
What risks does nuclear waste pose to Earth or the sun or outer space?
Answer:
It could pollute other planets. Nuclear waste might be attracted by the gravitational pull of the sun and disintegrate there instead. The waste storage spacecraft could crash into a planet, moon, or another astronomical body. It could be dangerous for other life forms out there.
Explanation:
How many grams of aluminum is produced when 82.4 grams of aluminum chloride
decomposes into chlorine gas and aluminum metal?
2AICI: - 2 Al + 3C12
Answer:
16.6 g of Al are produced in the reaction of 82.4 g of AlCl₃
Explanation:
Let's see the decomposition reaction:
2AlCl₃ → 2Al + 3Cl₂
2 moles of aluminum chloride decompose to 2 moles of solid Al and 3 moles of chlorine gas.
We determine the moles of salt:
82.4 g . 1mol/ 133.34g = 0.618 moles
Ratio is 2:2. 2 moles of salt, can produce 2 moles of Al
Then, 0.618 moles of salt must produce 0.618 moles of Al.
Let's convert the moles to mass → 0.618 mol . 26.98g /mol = 16.6 g
What is a phase change that occurs when a solid transitions directly into a gas state without becoming a liquid?
A. sublimation
B. boiling
C. condensation
D. deposition
How are the environments of a desert and a tundra different? A tundra is at a higher latitude than a desert. A tundra is more humid than a desert. A tundra is much warmer than a desert. A tundra receives less precipitation than a desert.
Answer: a tundra is at a higher latitude than a desert.
The environments of a desert and a tundra different because tundra is at a higher latitude than a desert. Therefore, option A is correct.
What is the main difference between a desert and a tundra?Temperature is the primary distinction between desert and tundra biomes. The desert has very warm temperatures, which can become extremely hot at times.
Extreme temperatures in some deserts can exceed 130 degrees Fahrenheit. Tundras are extremely cold, with many areas remaining frozen throughout the year.
Tundra regions typically receive less than 25 centimeters (10 inches) of precipitation per year, making them deserts. For six to ten months of the year, they have long, cold winters with high winds and average temperatures below freezing.
Thus, option A is correct.
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Cell theory states:
l.All living cells must have a cell wall.
ll.All living cells require glucose for survival
lll.A cell is the basic unit of life.
A. l only
B.ll only
C.lll only
D. l and lll
Answer:
C
Explanation:
cell theory states:
all living things are made of 1 or more cells
all cells come from pre-existing cells
the cell is the basic unit of structure
Aqueous sodium hydroxide reacts with carbon dioxide gas to yield soluble sodium carbonate and liquid
water. What is the chemical equation?
Explanation:
i have done
see the picture
and please mark me brainiest
Explain the process of photosynthesis.
Answer:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.
Explanation:
Brainliest please
.What is the KE of a baseball that has a mass of 100 kg and is traveling at 5 m/s?
Answer:
1250joules
Explanation:
The kinetic energy is energy in motion and it's formula is
KE =1/2MV^2
M represent mass which is 100Kg.
V represent velocity which is 5m/s
Therefore, KE = 1/2×100×5× 5
= 50 × 25
KE= 1250joules
What was the name of the super continent that existed when all the
continents were connected? *
O Pangea
O Megacontinent
Ultra continent
O Karen
Answer:
Pangea
Explanation:
Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million years ago, and began to break apart about 175 million years ago. Forming into what we have today :)
How much carbon dioxide will be formed if 12.5 grams of oxygen reacts with 7.2 grams of propane (C3H8 )? Balanced equation: C3H8 + 5 O2→ 3 CO2 + 4H
Answer:
10.3125 grams of carbon dioxide will be formed.
Explanation:
The balanced reaction is:
C₃H₈ + 5 O₂→ 3 CO₂ + 4 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles participate in the reaction:
C₃H₈: 1 mole O₂: 5 molesCO₂: 3 moles H₂O: 4 molesBeing the molar mass of the compounds:
C₃H₈: 44 g/mole O₂: 32 g/moleCO₂: 44 g/moleH₂O: 18 g/molethen by stoichiometry of the reaction, the following amounts of mass participate in the reaction:
C₃H₈: 1 mole* 44 g/mole = 44 gO₂: 5 moles* 32 g/mole= 160 gCO₂: 3 moles* 44 g/mole= 132 gH₂O: 4 moles* 18 g/mole= 72 gThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, it is possible to use a simple rule of three as follows: If by reaction stoichiometry 44 grams of propane react with 160 grams of oxygen, 7.2 grams of propane react with how much mass of oxygen?
[tex]mass of oxygen=\frac{7.2 grams of propane*160 grams of oxygen}{44 grams of propane}[/tex]
mass of oxygen= 26.18 grams
But 26.18 moles of O₂ are not available, 12.5 grams are available. Since you have less mass than you need to react with 7.2 grams of propane, oxygen O₂ will be the limiting reagent.
Then you can apply the following rule of three: if by stoichiometry of the reaction 160 grams of oxygen form 132 grams of carbon dioxide, 12.5 grams of oxygen will form how much mass of carbon dioxide?
[tex]mass of carbon dioxide=\frac{12.5 grams of oxygen*132 grams of carbon dioxide}{160 grams of oxygen}[/tex]
mass of carbon dioxide= 10.3125 grams
10.3125 grams of carbon dioxide will be formed.
What does the second quantum number (1) describe?
The second quantum number (l) describes which sublevel the electron is in
plsssss help !! what are the steps to convert from atoms, compounds, formula units, ect to moles
Answer:
Explained below.
Explanation:
From avogadro's number, we know that;
1 mole = 6.022 × 10^(23) atoms, molecules, protons e.t.c.
Now,to convert from atoms, compounds, formula units, etc to moles, what we will do is just to divide the amount of the particle value given in the specific units by avogadro's number.
For example, to convert 23 × 10^(20) atoms to moles, we will have;
Number of moles = (23 × 10^(20))/(6.022 × 10^(23)) moles = 0.00382 moles
. Given the following pOH's, calculate the pH for the solution:
a) pOH = 4.18 b) pOH = 12.35
4. Given the following pH's, calculate the pOH for the solution:
a) pH = 6.2 b) pH = 9.55
Answer:
a) pH = 9.82 b) pH = 1.65
a) pOH = 7.8 b) pOH = 4.45
Explanation:
pOH + pH = 14 for all of these solutions.
pH is a quantitative measure of the acidity or basicity of aqueous or other liquid solutions.
3.a)Given;
pOH = 4.18
To Find;
pH = ?
We know that
pH + pOH = 14
pH = 14 – pOH
pH = 14 – 4.18
pH = 9.82
Thus, The pH of the solution is 9.82
b)Given;
pOH = 2.35
To Find;
pH = ?
We know that
pH + pOH = 14
pH = 14 – 2.35
pH = 14 – 2.35
pH = 11.65
Thus, The pH of the solution is 11.65
4. a)
Given;
pH = 6.2
To Find;
pOH = ?
We know that
pH + pOH = 14
pOH = 14 – pH
pOH = 14 – 6.2
pOH = 7.8
Thus, The pOH of the solution is 7.8
4. b)
Given;
pH = 9.55
To Find;
pOH = ?
We know that
pH + pOH = 14
pOH = 14 – pH
pOH = 14 – 9.55
pOH = 4.45
Thus, The pOH of the solution is 4.45
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What is the mass of 500 mL of
1.0 M of H2O?
Answer:
In order to obtain a volume of
1 L
,
500 mL
of water must be added to the original solution of
500 L
.
Explanation:
Which statement about planetary orbits is correct?
O A. The planets travel in perfect circles around the sun.
O B. The planets travel in perfect circles around Earth.
O C. The planets travel in ellipses around the sun.
OD. The planets travel in ellipses around the moon.
Answer: C planets dont travel in perfect circles and they do not orbit earth they orbit the sun and they ellipse around the sun. this is the correct answer do not lsiten to the other person
Explanation:
The statement which is correct about planetary orbits is the planets travel in ellipses around the sun.
What are orbits?Orbits is the path of the motion, in which planets do revolutionary motion in a particular sequence.
In the solar system, sun is present at the center and all the planets do revolution around the sun in their orbits which are ellipse in their shape. Elliptical shape of the orbits is due the large distance of planets from the sun which reduces the speed due to less gravitational force of sun on that object.
Hence, option (C) is correct i.e. The planets travel in ellipses around the sun.
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Write a story about a family who uses a solar cooker and to stay healthy and safe.
Write out the balanced chemical equation for the reaction for when phosphate calcium reacts with lead chloride
Answer:
Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
(b) Zinc + Silver nitrate → Zinc nitrate + Silver
(c) Aluminium + Copper chloride → Aluminium chloride + Copper
(d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chlorid
Explanation:
How does the length of a lunar month compare to the average length of a month in a standard 365-day calendar?
b) Explain the importance of photosynthesis for plants.
Answer:
Green plants and trees use photosynthesis to make food from sunlight, carbon dioxide and water in the atmosphere: It is their primary source of energy. The importance of photosynthesis in our life is the oxygen it produces. Without photosynthesis there would be little to no oxygen on the planet.
What is used up in and stops a chemical reaction?
Answer:What is used up in and stops a chemical reaction? (a) percent yield (b) limiting reactant (c) theoretical yield (d) excess reactant
The correct option is (b)
Explanation:
A chemical reaction is a chemical combination,rearrangement or disintegration of chemical substance(s) (called reactants) to form new chemical substance(s) (called products).
A limiting reactant is the reactant that is totally used up during the course of a reaction. When this reactant is used up, it limits the amount of products formed and eventually stops the chemical reaction.
Explanation:
The limiting reagent is the reactant that is used up completely. This stops the reaction and no further products are made. ... This method is most useful when there are only two reactants. The limiting reagent can also be derived by comparing the amount of products that can be formed from each reactant.
hope this helps have a nice day❤️
A levee is a human-made feature that is designed to reduce the damage done by a.lighting b.floods c.earthquakes d.landslides
Answer:
not sure but I think its b
Answer:
the answer is about your question isb.floods
HCI + Zn --> H2 + ZnCl2
(Zinc in hydrochloric acid)
single replacement
double replacement
synthesis
decomposition
Answer:
Single replacement
Explanation:
Zn replaces the halogen (Cl) from HCl
It is a single replacement reaction