Answer:
Explanation:
Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too. Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground.
A B C D ............
Answer:
I think gamma, I'm not sure tho
help..................
Answer:
Volcanic eruption
Explanation:
a crater is this bowl shaped hole in the ground, and it is caused by a meteorite or volcanic activity
Which element has chemical properties most similar to carbon (C)?
A. Lithium
B. Silicon
C. Titanium
D. Neon
Answer:
b
Explanation:
Silicon has the chemical properties that are most similar to those of carbon
What is electrolysis
Answer:
Electrolysis is the process by which ionic substances are decomposed (broken down) into simpler substances when an electric current is passed through them. Electricity is the flow of electrons or ions.
Explanation:
hope it helped:)))))
Name the 6 kinetic factors
Please help fast. I will give brainliest!
Answer:
c=-1+x=varible+a=(5)^3
Explanation:
facts
How many particles of CuCr2O7 are present in a 64.5 gram sample?
1.39 × 10²³ particles CuCr₂O₇
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 64.5 g CuCr₂O₇
[Solve] particles CuCr₂O₇
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of Cu - 63.55 g/mol
[PT] Molar Mass of Cr - 52.00 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of CuCr₂O₇ - 63.55 + 2(52.00) + 7(16.00) = 279.55 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 64.5 \ g \ CuCr_2O_7(\frac{1 \ mol \ CuCr_2O_7}{279.55 \ g \ CuCr_2O_7})(\frac{6.022 \cdot 10^{23} \ particles \ CuCr_2O_7}{1 \ mol \ CuCr_2O_7})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 1.38944 \cdot 10^{23} \ particles \ CuCr_2O_7[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.38944 × 10²³ particles CuCr₂O₇ ≈ 1.39 × 10²³ particles CuCr₂O₇
Can somebody help please
Answer:
98 moles of H₂O.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2HCl + CaCO₃ —> CaCl₂ + H₂O + CO₂
From the balanced equation above,
1 mole of CaCO₃ reacted to produce 1 mole of H₂O.
Finally, we shall determine the number of mole of H₂O produced by the reaction of 98 moles of CaCO₃. This can be obtained as follow:
From the balanced equation above,
1 mole of CaCO₃ reacted to produce 1 mole of H₂O.
Therefore, 98 moles of CaCO₃ will also react to produce 98 moles of H₂O.
Thus, 98 moles of H₂O were obtained from the reaction.
This is hard, isn't it? please help me though. PLEASE
What is the answer:
C4H8+H2=
Find the mass of 1.59 mol of NH3.
Please show the work if you can!
Answer:
25.4/km=3
Explanation:
what is the effect of light on valence electrons?
Answer:
When a small amount of external energy in the form of light is applied to the conductor, the valence electrons gain enough energy from the light to break the bonding with the atom and they jumps into the conduction band.
The effect of light on valence bis absent negative charges in the valence band, correspond to electrons elevated to the conduction band. When the semiconductor is lit, current flow is increased by both electrons and holes.
Why are valence electrons important?The outermost or valence shell electrons, known as valence electrons, are crucial because they shed light on an element's chemical characteristics and are the ones that are acquired, lost, or shared during a chemical reaction.
In general, when an atom's outermost electron shell is full, it is at its most stable and least reactive.
Thus, The valence electrons get enough energy from the light to break their link with the atom and move into the conduction band when a modest amount of external energy in the form of light is delivered to the conductor.
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12) Balance the following chemical equation:
Zn +
H3PO4
Zn3(PO4)2 +
H2
Answer:
Sorry I am not very good at chemistry.
Explanation:
What is the correct IUPAC name for the acid: H2Lv
How do changes to genes in body cells differ from changes to genes in egg and sperm cells?
Answer:
These genetic changes are not present in a parent's egg or sperm cells, or in the fertilized egg, but happen a bit later when the embryo includes several cells. As all the cells divide during growth and development, cells that arise from the cell with the altered gene will have the mutation, while other cells will not.
Explanation:
How do ethnics affect scientific research ?
Answer:
A
Explanation:
scientists should not be allowed to conduct research that is harmful to others.
How many moles of NaCl are contained in 100.0 mL of a 0.20 M solution?
Answer:
0.02 mol.
Explanation:
A H2CO3 (aq) ---> CO2 (g) + H2O (l) B H2SO4 (aq) + 2NaOH (aq) ---> Na2SO4 (aq) + 2H2O (l) C 2H2 (g) + O2 (g)----> 2H2O (l) D AgNO3 (aq) + NaOH (aq) ---> AgOH (s) + NaNO3 (aq) Which equation above represents a precipitation reaction?
Answer: [tex]AgNO_3(aq)+NaOH(aq)\rightarrow AgOH(s)+NaNO_3(aq)[/tex]
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The equation which represents a precipiation reaction is:
[tex]AgNO_3(aq)+NaOH(aq)\rightarrow AgOH(s)+NaNO_3(aq)[/tex]
How is stoichiometry used to calculate the amount of product produced?
A. Stoichiometry measures the amount of product obtained.
B. Stoichiometry determines the molar mass of the product.
C. Stoichiometry calculates the grams of the limiting reagent.
D. Stoichiometry relates moles of product.
Answer:
Stoichiometry relates moles of reactant to moles of product
Explanation:
Just took the quiz :)
Answer:
Stoichiometry relates moles of reactant to moles of product.
Explanation: :)
Most of Earth's atmosphere is made up of nitrogen gas. Nitrogen can also
exist as a solid, liquid, or plasma. Four samples of nitrogen are each in a
different state but have the same mass. Which statement about the relative
amounts of thermal energy in the samples is true?
Answer:
it should be B (i did this wrk before)
Explanation:
The following symbol (<-->) means
Answer:
Greater than or less than
What is the molarity to the nearest hundredth of a solution made by dissolving 1.71 moles of NaOH in enough water to produce an 875 mL solution? (REMINDER THE VOLUME MUST BE IN L. 1000 ML = 1 L)
Answer:
Explanation:
50 is the volume
Answer: 1.95 mol/l
Explanation: molarity = concentration = amount of substance/volume.
Also v = n/V= 1.71 mol/ 0.875 litres= 1.9542857 mol/l
In the Haber reaction shown below, _______?is the
limiting reactant if equal moles of each reactant are used.
3H2 + N2 -> 2NH3
Answer: hydrogen
Explanation:
2. What is the pressure of a fixed volume of hydrogen gas at 30.0°C if it has a pressure of 1.11 atm at 15.0°C?
Answer:
1.17
Explanation:
1.17 hope this helps
The initial pressure of the fixed volume of the hydrogen gas as the pressure and temperature decreased is 1.17atm.
What is Gay-Lussac's law?Gay-Lussac's law states that the pressure exerted by a given quantity of gas varies directly with the absolute temperature of the gas.
It is expressed as;
P₁/T₁ = P₂/T₂
Given the data in the question;
Initial pressure P₁ = ? Initial temperature T₁ = 30.0°C = 303.15KFinal pressure P₂ = 1.11atmInitial temperature T₂ = 15.0°C = 288.15KWe substitute our values into the expression above.
P₁/T₁ = P₂/T₂
P₁T₂ = P₂T₁
P₁ = P₂T₁ / T₂
P₁ = ( 1.11atm × 303.15K ) / 288.15K
P₁ = 336.4965 / 288.15K
P₁ = 1.17atm
Therefore, the initial pressure of the fixed volume of the hydrogen gas as the pressure and temperature decreased is 1.17atm.
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50 points if its right In the Northern Hemisphere, choose ALL that apply
Question 2 options:
Summer solstice occurs when the Earth's North Pole is tilted toward the sun.
Fall and Spring Equinoxes occur when days and nights are equal in length.
The tilt and revolution of the Earth causes the seasons
Winter solstice occurs when the Earth's North Pole is tilted away from the sun.
Answer:
All are correct
Explanation:
I took the test
Answer: pick all
Explanation:
i got 100% on my qiuz
UGRENT! Please help showing all work
Answer:
a. Oxygen
b. 2.62 g of NO
c. 85.2%
Explanation:
Let's see the presented reaction:
4NH₃ + 5O₂ → 4NO + 6H₂O
4 moles of ammonia react to 5 moles of oyxgen in order to produce 4 moles of NO and 6 moles of water.
To determine limting reagent, we need moles of each reactant. Let's calculate them:
3.25 g /17 g/mol = 0.191 moles
3.50 g /32 g/mol = 0.109 moles
4 moles of amonia react to 5 moles of oxygen
Then, 0.191 moles will react to (0.191 . 5) / 4 = 0.238 moles
We only have 0.109 moles available and we need 0.238, so the oxygen is the limting reactant.
5 moles of O₂ can produce 4 moles of NO
So, our 0.109 moles will produce (0.109 . 4) /5 = 0.0872 moles
We convert the moles to mass: 0.0872mol . 30g/mol = 2.62g
(Yield produced / Theoretical yield) . 100 = %
(2.23g / 2.62g) . 100 = 85.2%
If the initial rate of H2 to disappear is 2.0 moles per second, what is the rate of appearance of NH3 at the same time? N2(g) 3 H2(g) ⇌ 2 NH3(g)
Answer:
1.33 moles per second
Explanation:
From the balanced equation of reaction, 3 moles of H2(g) need to disappear/be consumed before 2 moles of NH3(g) can be formed/appear.
According to reaction law, the rate of disappearance of reactants is equal to the rate of appearance of products.
Now, only 2 moles per seconds of H2 has disappeared initially;
3 moles H2 is needed for 2 moles NH3
2 moles H2 will give; 2 x 2/3 = 4/3 or 1.33 moles
Hence, if the initial rate of disappearance of H2 is 2.0 moles per second, the initial rate of appearance of NH3 would be 1.33 moles per second.
Drag each item to show if it is matter or not matter.
light bulb added to
sunlight
heat
lamp
matter
light bulb
not matter
which type of window is double glazed window
Answer:
Hope this helps and have a good day!
Explanation:
Double glazed is a fancy term for a window that has two panes of glass. There are also triple glazed windows (three panes). The multiple panes of glass in a single window frame helps with insulation.
Which one of the following to all methods of heat transfer require?
a. A difference in thermal energy
b. A liquid or gaseous state
c. Direct physical contact
d. The movement of particles
Answer:
A
Explanation:
A difference in thermal energy
The study of chemicals is called chemistry.
The correct answer is A.
According to the law of thermodynamics, It states that heat transfers from the high temperature to the low temperature.
According to the question, heat transfer must require the temperature difference between the two systems and allow to flow from high temperature to low temperature.
Hence, the correct answer is A that is a difference in thermal energy
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