Answer:
A palavra 'composto' também vem do latim, e significa literalmente 'compor' alguma coisa. Então esta é a composição que podes ver no frasco à direita. O composto é uma composição de todos os tipos de substâncias orgânicas que se decompõem com o tempo e se tornam húmus. O húmus é uma unidade homogênea.
Explanation:
Answer:
below...
Explanation:
The main difference between Compost and Humus is that the Compost is a organic matter that has been decomposed and recycled as a fertilizer and soil amendment and Humus is a any organic matter that has reached a point of stability.
Use the Word Correctly in a Sentence
Ion
A piece of wood that measures 3 cm by 6 cm by 4 cm has a mass of 80 g. What is the density of the wood? If the density of water is 1 g/mL, would the wood float in water? Explain.
Answer: yes
Explanation:
The core of earth is made of iron and nickel the outer core is so hot that it melts metal. The inner core is solid. What causes these diffrences
Answer:
The inner core is solid by intense pressure of all the layers above it.
Explanation:
The inner core is made up of heavy elements such as iron and nickel. It therefore possesses an unusually high pressure that makes the expanded inner core which arose from effects of high temperature to be nullified.
Thus, we can say that the inner core is solid by intense pressure of all the layers above it.
ANSWER NEEDED ASAP!!
How many grams of Cl2 {molar mass = 70.9 g/mol} gas can be produced
when 0.98 L of HCl reacts with an excess of O2 at STP?
4HCI (g) + O2 (g) --> 2012 (g) + 2H20 (g)
[remember sig figs and don't include units in your answer]
A lab requires 20.5g of KNO₃. How many moles of KNO₃ are being used in the lab. Your answer should include a correct numerical set up. What is the approximate percent by mass of the water in the hydrated salt? [Show all work.] *
Answer:
the answer is 0.2
Explanation:
we have a formula that mole= reacting mass/ molar Mass and the molar Mass of KNO3 is 101 so since mole is reacting mass/ molar Mass and our reacting mass is 20.5 then divided it by 101 it is equal to 0.2
The following statements were stated by a politician who was paid by the nuclear energy lobby in a debate in favor of nuclear energy:
a. Nuclear energy doesn’t produce a byproduct because the atoms disappear.
b. Nuclear energy produces no polluting gas in its reaction.
c. Nuclear energy does not contribute to global warming.
d. Nuclear energy has low mining and transportation effects on environment.
Which statement is false and should not be used to argue in favor of nuclear energy?
A) Statement A
B) Statement C
C) Statement D
D) Statement B
Answer:
d
Explanation:
the best state ment is d lol
Describe the motion of the water molecules as the vapor pressure increases?
Answer: As for vapor pressure being higher at higher temperatures, when the temperature of a liquid is raised, the added energy in the liquid gives the molecules more energy and they have greater ability to escape the liquid phase and go into the gaseous phase.
Explanation:
The motion of the water molecules as the vapor pressure increases is:
The water molecules have greater energyAccording to the movement of the water molecules in a pressurized environment where the vapor and the temperature are increased, there is an increased ability to change from liquid to gas.
As a result of this, the water molecules has greater energy as they are subjected to increased levels of temperature and vapor pressure which makes them have more energy and to be more unstable.
Read more here:
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All changes in phase (solid-liquid-gas) are
Answer:
States of matter
Explanation:
Three states of matter
Carbon dioxide and oxygen are both ___ found in the air.
Answer:
gases
Explanation:
Answer:
the Carbondioxed and oxygen are both a gass found in the air
Biomes are characterized by temperature, precipitation, and the plant and animal communities that live there.
True or false?
What volume is occupied by 2.33 miles of an ideal gas at 0.953 atm and 44°C
Answer:
6663.6
Explanation:
Which 0.1 M solution has a pH greater than 7?
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1. C6H1206
2.CH3COOH
3.КСІ
4.KOH
Answer:
4) KOH
Explanation:
Trust
0.1 M KOH has a pH greater than 7.
What is pH?
The pH of a solution is a measure of hydrogen ion (H+) concentration, which is, a measure of acidity.
What is POH?The pOH of a solution is measure of hydroxide ions (OH).which is a measure of basicity.
The pH of
CH3COOH is 2.88..КСІ is 7KOH is 12∴According to the question the pH greater than 7 is KOH
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If the football indoors had a volume of 5.33 L at 21degrees celsuis, what is the volume of the football outside where the temp is 10C (temp must be in K) MUST SHOW WORK
Answer:
5.13 L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 5.33 L
Initial temperature (T₁) = 21 °C
Final temperature (T₂) = 10 °C
Final volume (V₂) =?
Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = 21 °C
Initial temperature (T₁) = 21 °C + 273
Initial temperature (T₁) = 294 K
Final temperature (T₂) = 10 °C
Final temperature (T₂) = 10 °C + 273
Final temperature (T₂) = 283 K
Finally, we shall determine the final volume. This can be obtained as follow:
Initial volume (V₁) = 5.33 L
Initial temperature (T₁) = 294 K
Final temperature (T₂) = 283 K
Final volume (V₂) =?
V₁/T₁ = V₂/T₂
5.33 / 294 = V₂ / 283
Cross multiply
294 × V₂ = 5.33 × 283
294 × V₂ = 1508.39
Divide both side by 294
V₂ = 1508.39 / 294
V₂ = 5.13 L
Thus, the new volume of the football is 5.13 L
describe each of the three states of matter (solid, liquid, gas)
Explanation:
In a solid particles are firmly together and are stuck in a regular pattern
in a liquid particles still touch but arent in a fixed pattern
in a gas particles move quickly in all directions
hello,
someone help me plz
Q. A small amount of Ferrous sulphate is heated in hard glass tube.
a) Write the balanced chemical reaction involved.
b) Name the type of reaction taking place.
Answer:
[tex]a)\ 2FeSO4 \xrightarrow{\text{Heat}} SO_3+SO_2+Fe_2O_3\\b)\ Decomposition\ Reaction[/tex]
Explanation:
Ferrous Sulphate[tex](FeSO4)[/tex] is generally found as Lime-Green Crystals. On heating, these crystals almost immediately turn white-yellow. They then, break down to produce an anhydrous mixture of Sulphur Trioxide [tex](SO_3)[/tex], Sulphur Dioxide [tex](SO_2)[/tex] as well as Ferric Oxide [tex](Fe_2O_3)[/tex].
We can hence, frame a skeletal equation of this reaction and try to balance it.
Hence,
[tex]FeSO4 \xrightarrow{\text{Heat}} SO_3+SO_2+Fe_2O_3[/tex]
Now,
a)In order to balance it through the 'Hit &Trial Method', we'll follow a series of steps:
1. First, lets compare the number of Fe (Iron) atoms on the RHS and LHS. We find that, the no. of Fe Atoms on the RHS is twice the number of Fe Atoms on the LHS. We hence, add a co-effecient 2 beside [tex]FeSO_4[/tex].
2. Now, Iron atoms, Sulphur Atoms and Oxygen atoms occur 2, 2, 8 respectively on both the sides:
Hence, As all the other elements as well as iron, balance, we've arrived upon our Balanced Equation :
[tex]2FeSO4 \xrightarrow{\text{Heat}} SO_3+SO_2+Fe_2O_3[/tex]
b) We know that, decomposition reactions are [generally] endothermic reactions in which Large Compounds decompose into smaller elements and compounds. Here, as Ferrous Sulphate decomposes into Sulphur Dioxide, Sulphur Trioxide and Ferric Oxide, the reaction that occurs here is Decomposition Reaction.
The chemical formula for gold (III) oxide
ionic compounds
Answer:
Gold(III) oxide (Au2O3) is an inorganic compound of gold and oxygen with the formula Au2O3. It is a red-brown solid that decomposes at 160 °C. (Au203 <---)
If 0.0015 moles of NaOH is dissolved in 11 L of water, what is the pH of the
solution?
Answer:
pH = 10.15
Explanation:
NaOH is a strong base so it dissolves completely.
Calculate your [OH-] first by dividing the moles of OH- by the volume.
0.0015 mol OH- / 11 L = 0.00014
Then, calculate the pOH:
pOH = -log[OH-] = -log(0.00014) = 3.85
pOH + pH = 14, so pH = 14 - pOH = 14 - 3.85 = 10.15
2.00g of Copper wire was added to 50.0 mL of a 0.050M solution of Silver Nitrate. The reaction
produced solid silver and aqueous copper II Nitrate. The silver precipitate was collected and
dried. It was determined that the mass of the silver precipitate was 0.24 g. Use this information
to determine the theoretical yield, limiting reactant, and percent yield.
Answer:
See explanation
Explanation:
Now, the equation of the reaction is;
Cu(s) + 2AgNO3(aq) --------> Cu(NO3)3 (aq) + 2Ag(s)
Number of moles of silver precipitate = 0.24/108 g/mol= 0.0022 moles
Number of moles of AgNO3 = 50/1000 * 0.050 = 0.0025 Moles
If 2 moles of AgNO3 yields 2 moles of Ag
Then 0.0025 moles of AgNO3 yields 0.0025 * 2/2 = 0.0025 moles of Ag
Number of moles of Cu = 2.00g/63.5 g/mol = 0.03 moles
If 1 mole of Cu yields 2 moles of Ag
0.03 moles of Cu yields 0.03 moles * 2/1 = 0.06 moles of Ag
Hence AgNO3 is the limiting reactant
Theoretical yield of Ag = 0.0025 moles of Ag * 108 = 0.27 g
Actual yield of Ag = 0.24 g
Percent yield = actual yield/theoretical yield * 100
Percent yield = 0.24/0.27 * 100
Percent yield = 88.8%
You are melting a chocolate and accidentally have the stove up to high. the chocolate starts to burn on the bottom of your pot. Physical or Chemical Change?
Answer:
it is a chemical change because it can't be change back to it normal position when it gets burnt
What is the percent composition (by mass) of MgBr2?
Answer:
13.2% Mg, 86.8% Br
Explanation:
Mg has a molar mass of 24.31g/mol.
Bromine has a molar mass of 79.90 g/mol.
There is one mole of Mg and two moles of Br in the compound:
79.90x2 + 24.31 = 184.11
So the total molar mass of MgBr2 is 184.11.
A percent tells us a part of a whole, so we will divide each part of the mass into the whole mass.
24.31g Mg / 184.11g MgBr2 = .132
159.8g Br / 184.11g MgBr2 = .868
Multiply these decimals by 100 to make them into a percent.
.132 x 100 = 13.2% Mg
.868 x 100 = 86.8% Br
Indicate which aqueous solution has the highest boiling point elevation. (Kb for water = 0.512 °C/m)
Answer:
carbon tetrachloride
Explanation:
Boiling point elevation of a liquid or a compound is defined as the boiling point of a liquid that is that will be higher when some other other compound is added. It means that the solution has a higher boiling point than the solvent. When a non volatile solute is added to the pure solvent like water, it results in the highest boiling point elevation.
Carbon tetrachloride, Kb = 5.03°C/m shows highest boiling point elevation when it is used to make a 0.10 m non - electrolyte solution.
show the path to the formation of sodium calcium and aluminum bases please help me
Answer:
i hope this helps :)
Explanation:
please mark brainlest
Answer:
dunno
Step-by-step explanations:
Based on what you have learned about the units for measuring thermal energy, complete the following passage.
The unit often used in chemistry and physics to measure energy, such as for work or electrical current, is the
. We can also use this unit, as we did in this lab, for measuring
. This is a property that is quantified by the energy needed per
of material to raise the temperature by one
. The unit for this measure is therefore
.
Answer:
1.joule 2.specific heat 3.gram 4.degree Celsius 5.J/g°CExplanation:
I did the lab
Thermal energy is represented in the units joules J. It is the energy needed to raise the temperature by one degree celsius.Per gram this energy is called as specific heat capacity with the unit J/°Cmol.
What is heat capacity?Heat capacity of a substance is the heat energy required to raise the temperature of the substance by one degree celsius.
If the heat capacity is measure per one mole of a substance it is called specific heat capacity. It is an intensive property whereas heat capacity is an extensive property.
The given passage can be completed as follows:
The unit often used in chemistry and physics to measure energy, such as for work or electrical current, is Joule (J). We can also use this unit, as we did in this lab, for measuring heat capacity.
This is a property that is quantified by the energy needed per one gram of material to raise the temperature by one degree celsius.The unit for this measure is therefore J/°Cg.
To find more about heat capacity, refer the link below:
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You and a friend are swimming at your grandparent's house one toasty
summer afternoon. You have music playing through the Bluetooth speaker
on the pool deck, but every time you go underwater, you can hear the
noise, but you cannot understand the words of the song. What would
explain this phenomenon? *
Sound waves travel faster in a gas than they do in a liquid, which is why you cannot
understand the words,
Sound waves travel faster in a liquid than a gas, our ears are just not designed to
translate the faster moving waves,
Sound waves cannot travel at all in a liquid, which is why you cannot understand the
words and it's a miracle you can even hear the music at all,
Sound waves travel at the same speed regardless of the medium; your grandfather is
turning the music on and off when you go underwater and the noise you hear is the
song stuck in your head,
Answer:
Sound waves travel faster in a liquid than a gas, our ears are just not designed to translate the faster moving waves.
Explanation:
Sound waves are mechanical waves which travel through vibrating the medium (the "stuff") they're traveling through. This means they actually move faster through materials that are more dense, and will move more quickly through liquid than gas, and a solid than a liquid. However, our ears are adapted to "translating" sound waves in air rather than water, so we don't understand the music well when the waves move through the water.
A similar idea explains why our vision is blurry underwater; light waves travel at a different speed (slower, not faster!) in water and our eyes perceive this change in speed as blurriness.
Ture or False: air has its components spread evenly, so it is considered a homogenous mixture.
Answer:
True.
Explanation:
The composition of a mixture is varied by altering the proportions of its constituents. True. Solutions are heterogeneous since the ratio of solute to solvent does not remain the same throughout the solution.
Which of the following represents the molecules of one compound and
atoms of one element?
Answer:
i think its b.c but I'm not sure
Answer:
A
Explanation:
A is element as all of them look the same
b is mixture of atoms
C is mixture of atoms and compounds
D is just atoms
E is mixture of element and compound
what is the percent composition of potassium phosphate? show your work
Answer:
35.62%
Mass percent composition of K = 0.3562 x 100% Mass percent composition of K = 35.62%
Explanation:
An experiment requires 0.38 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.38 M base? Answer in units of mL.
Answer:
480 mL
Explanation:
15L of 0.38M of NH3(aq.) means that we require 15x0.38 moles of NH3.
this is to be provided by 15M x V.
Where V is volume in Liters.
These are equal
⇒15M x V = 15x 0.48
Hence, Volume required V = 0.48L =480mL
Ohio Achievement Test Coach Science, Grade 5
10. Bob first blows whistle hard. Then he blows the same whistle gently. What
changed when Bob blew the whistle the second time?
POSTTEST
A pitch
B. volume
C. pitch and volume
D. frequency
The amount of solar radiation changes due to the
WILL MARK BRAINLIEST!!
Due to the variations in the sun-earth distance.
Hope it helps *-*