Answer:
2000
Explanation:
it is verified by scientists
3440 kJ is the energy that is required to vaporize 2 kg of aluminum. The elemental source of energy upon earth is said to be the sun.
What is energy?On earth, energy comes in a variety of ways. The elemental source of energy upon earth is said to be the sun. Energy is seen as a quantifiable property in physics that may be transferred form an item to carry out work. Thus, we might characterise energy as the capacity to engage in any sort of physical action. So, to put it simply, we may describe energy as:
The capacity to perform work is energy. Energy "can neither be created neither destroyed but must instead be converted forms one form to another," according to the rules of conservation of energy. The SI unit for energy is called a joule.
Q = m× Lvapor
=m×293.4 kJ/mol
=3440 kJ
Therefore, 3440 kJ is the energy that is required to vaporize 2 kg of aluminum.
To know more about energy, here:
https://brainly.com/question/1932868
#SPJ7
Which label best classifies all three of these steps?
A chemical reaction takes place.
Reactants are gathered in chloroplasts.
Energy is used to make food.
Oxygen is produced and stored in the plant.
Answer:
a
Explanation:
a
Answer:
Reactants are gathered in chloroplasts.
Explanation:
Photosynthesis is a process unique to autotrophic organisms like plants. It is the process whereby plants use energy from sunlight to make their own food (chemical substance). The photosynthetic process occurs in two stages in the Chloroplast viz: Light dependent stage and light-independent stage.
In the light dependent stage, the plant captures energy from sunlight via its Chlorophyll pigment and uses it to break down water molecules (H2O) in a process called PHOTOLYSIS OF WATER. This process brings about the electrons and protons needed to form NADPH and ATP molecules respectively. This process occurs in the thylakoid membrane of the CHLOROPLAST.
In the light independent stage, also known as Calvin cycle, the plant uses the NADPH and ATP molecules produced in the light stage to reduce Carbondioxide (CO2), which enters through the stomata of the plant, and power the formation of glucose molecule (C6H12O6).
Hence, based on the steps listed by Jeremy for the photosynthetic process, the gathering of reactants (CO2, H2O and light energy) in the Chloroplast of the plant best classifies those steps
At 1.4 atm of pressure a gas has a volume of 111 ML at what pressure will the gas have a volume of 85 ML.
Answer:
The pressure will be 1, 83 atm
Explanation:
We use Boyle Mariotte's formula: for a given mass of gas at constant temperature, the pressure and volume vary inversely proportionally. We convert the unit ml into L: 111/1000= 0,111 L and 85/1000= 0,085 L.
P1xV1=P2xV2
P2= (P1xV1)/V2=(1,4 atm x 0,111L)/0,085L=1,83 atm
Consider this reaction mechanism: Step 1: Mo(CO)6→ Mo(CO)5 + CO Step 2: Mo(CO)5 + P(CH3)3→ Mo(CO)5P(CH3)3 Which of these is an intermediate
Answer:
Mo(CO)5 is the intermediate in this reaction mechanism.
Explanation:
The reaction mechanism describes the sequence of elementary reactions that must occur to go from reactants to products. Reaction intermediates are formed in one step and then consumed in a later step of the reaction mechanism.
In this reaction mechanism, Mo(CO)5 is the product of 1st reaction and then it is used as a reactant in 2nd reaction. So, Mo(CO)5 is the reaction intermediates.
The overall balanced equation would be,
Mo(CO)6 + P(CH3) ↔ CO + Mo(CO)5 + P(CH3)3
Answer:
In terms of molecularity, Step 1 is
⇒ unimolecular
and Step 2 is
⇒ bimolecular.
Explanation:
EDGE 2023
What definition BEST describes a watershed?
Select one:
Area that collects precipitation and drains it to the lowest point
Consists only of rivers, lakes, and streams
Place where all water is stored underground
All of the rain water of a specific area
The best definition of a watershed is Option(A) Area that collects precipitation and drains it to the lowest point.
What is a watershed ?A watershed is the area of land where all of the water that drains off at its lowest point of it goes into the same place- a river, stream or lake. The smallest watersheds are the drainage areas for small streams and lakes. It can also be at the lowest point like a creek or a river.
To learn more about watershed, refer -
https://brainly.com/question/3097550
#SPJ2
If an atom has 17 protons, 14 neutrons, and 20 electrons, what is the atom's electrical charge?
A. -3
B. -4
C. +4
D. -7
Answer:
-3
Explanation:
Vitamin A is a very large organic molecule composed of twenty atoms
of carbon, one atom of oxygen and thirty atoms of hydrogen. How
many atoms total are in TWO molecules of vitamin A.
Select one:
84
68
34
102
Answer:
102
Explanation:
(20+1+30)*2
you add the total number of atoms that can be found in one molecule of vitamin A then multiply by 2
Final answer:
To find the total number of atoms in two molecules of vitamin A, we multiply each type of atom by two and add the totals together, resulting in 102 atoms.
Explanation:
The question is asking to calculate the total number of atoms in two molecules of vitamin A, based on the given composition of one molecule of vitamin A. According to the question, a single molecule of vitamin A contains 20 carbon atoms, 30 hydrogen atoms, and 1 oxygen atom. To find the total number of atoms in two molecules, we simply multiply the number of each type of atom by two and then add up the totals.
For carbon: 20 atoms × 2 = 40 atoms
For hydrogen: 30 atoms × 2 = 60 atoms
For oxygen: 1 atom × 2 = 2 atoms
Adding these together gives us:
40 (carbon) + 60 (hydrogen) + 2 (oxygen) = 102 atoms
Convert 5 moles H2O to liters
PLEASE HELP ME ! A group of students performed an experiment in which they dropped a cube of metal into a graduated cylinder of water. The initial temperature of the water was 25 'C. The mass of the water was 50 g
After energy in the form of heat was transferred to the water, its temperature was 35 C. Based on the evidence, how much energy was transferred between the metal and the water?
0.2 cal
10 cal
so call
• 500 cal
The amount of energy transferred between the metal and the water is 500 cal.
Explanation:The amount of energy transferred between the metal and the water can be calculated using the formula:
Energy = Mass of water × Specific heat of water × Change in temperature
Given that the initial temperature of the water was 25 °C and the final temperature was 35 °C, and the mass of the water was 50 g, we can substitute these values into the formula:
Energy = 50 g × 1 cal/g °C × (35 °C - 25 °C)
= 500 cal
Therefore, 500 cal of energy was transferred between the metal and the water.
The most highly concentrated hydrochloric acid is 12 M. What volume of a 12 M stock solution of HCL should be diluted in order to produce 6.0 L of 0.50 M HCL?
A. 1.0 L
B. 3.0 L
C. 250 mL
D. 500 mL
The volume of that 12M stock solution of HCL must be diluted to generate 6.0 L of 0.50 M would be:
C). 250 mL
Find the volumeGiven that,
Stock solution of HCL = 12 M
Amount of HCL to be produced = 6.0 L of 0.50 M
To find,
The volume of stock solution = (0.5 × 6)/12
= 0.25 l
By converting 0.25 liters into ml,
= 0.25 × 1000
= 250 ml
∵ 250 ml is the amount of HCL required.
Thus, option C is the correct answer.
Learn more about "Volume" here:
brainly.com/question/1578538
A sample of gas occupied 250.0 mL at 30.0 C. What volume will it have at 60.0 C, assuming the pressure remains constant?
Answer: 274.75 mL
Explanation:
Initial volume of gas V1 = 250.0 mL
Initial temperature of gas T1 = 30.0 C
Convert temperature in Celsius to Kelvin
(30.0°C + 273 = 303K)
New volume V2 = ?
New temperature T2 = 60.0 C
(60.0°C + 273 = 333K)
Since, volume and temperature are involved while pressure is constant, apply the formula for Charles law
V1/T1 = V2/T2
250.0 mL/303K = V2/333K
Cross multiply
250.0 mL x 333K = 303K x V2
83250 = 303V2
V2 = 83250/303
V2 = 274.75 mL
Thus, the volume will be 274.75 mL
Which elements make up a water molecule?
hydrogen and nitrogen
oxygen and nitrogen
oxygen and carbon
hydrogen and oxygen
Answer: it’s d on edunuity. (Hydrogen and oxygen)
Explanation:
how many grams of zncl2 will be produced from 32.0 g of zn and 13.0 g of cucl2
Answer: 13.2g of ZnCl2
Explanation:
What physical property of materials depends on the ability of electrons to move
easily?
A Solubility in water
B Electrical conductivity
C Low melting point
D Brittleness
The physical property that depends on the ability of electrons to move easily is electrical conductivity, which is characteristic of materials like metals that are good conductors of electricity.
B is correct
Explanation:The physical property of materials that depends on the ability of electrons to move easily is electrical conductivity. Materials with high electrical conductivity, such as metals, allow electrons to flow through them with ease, facilitating the flow of electric current.
Examples include silver and copper, which are widely used in electrical wiring and components due to their excellent conductivity. In contrast, materials with low electrical conductivity or insulators, like rubber or glass, do not allow electrons to move freely, inhibiting the flow of electric current.
When considering the options provided, solubility in water and melting points are not directly related to the movement of electrons, and brittleness is a mechanical property that describes how easily a material can break or shatter.
Learn more about Electrical Conductivity here:https://brainly.com/question/31668005
#SPJ2
what elements make up a molecule of a glucose?
Answer:
All carbohydrates, including sugar, therefore contain the same three elements: carbon, hydrogen and oxygen. Different arrangements of these elements form single units to make different types of carbohydrates. Glucose, for instance, is a single-unit carb with six carbon atoms, 12 hydrogen atoms and six oxygen atoms.
Explanation:
Final answer:
A molecule of glucose is composed of carbon, hydrogen, and oxygen, with the chemical formula C6H12O6, featuring six carbon atoms, twelve hydrogen atoms, and six oxygen atoms arranged in a specific structure.
Explanation:
The elements that make up a molecule of glucose are carbon (C), hydrogen (H), and oxygen (O). The chemical formula for glucose is C₆H₁₂O₆. This indicates that each glucose molecule consists of six carbon atoms, twelve hydrogen atoms, and six oxygen atoms. These elements are arranged in a specific structure where each carbon atom forms four bonds connecting to other carbon atoms, as well as to hydrogen and oxygen atoms. The six carbon atoms form the backbone of the glucose molecule, with the oxygen and hydrogen atoms attached to this carbon chain.
Darwin developed the theory of evolution. Which of these observation is the best evidence for the theory of evolution?
A) Humans have very diverse traits today.
B) There appear to be missing links in the evolutionary chain.
C) Life on earth has been found to date back billions of years.
D) DNA found in older primate fossils resemble those of humans today.
Answer: It's D
Explanation:A and B cant be it and C has nothing to do with it because it doesnt talk about evolution while D does that the older fossils resemble us
C. Which molecule is not linear?
a H₂O
b. CO₂
c. N₂
d. Cl₂
Answer:
I think the answer is
(H2O) water molecule
Which are caused by global warming?
a. Extreme weather conditions
b. Displaced animal habitats
C. Sea level rising
d. All of the above
What to do when tired and can not sleep?
Answer: listen to relaxing music
if you have 0.5 grams of CaCl2 dissolved to make 15mL of solution, what is the molarity of the solution?
Answer:
0.3M
Explanation:
Molarity of a solution is given by;
M=n/v
Where;
n= number of moles of solute = mass of solute / molar mass
v= volume of solution
n= mass of CaCl2 / molar mass of CaCl2
Mass of CaCl2 = 0.5
Molar mass of CaCl2 = 40 + (2×35.5)
= 111g/mol
n = 0.5/111 = 0.0045mol
volume, v= 15mL = 15/1000 L = 0.015L
Note that molarity is in mole per liter, hence we convert 15mL to L. 1mL=1/1000L
M =0.0045/0.015
M=0.3mol/L
Therefore, the molarity of the solution is 0.3M
PLEASE ANSWER !!!
2H2 + O2 —> 2H20 + energy
What type of reaction is represented by this equation ?
- decomposition
-double replacement
-Single replacement
-synthesis
Answer: synthesis reaction.
Explanation:
The type of reaction represented by the equation is synthesis reaction.
Definition of synthesis reactionA synthesis reaction is simply defined as reaction in which two or more substances react to produce a single new substance which has characteristics different from the reactants.
Considering the equation given, we can conclude as follow:
2H₂ + O₂ —> 2H₂0 + energy
The reaction is a synthesis reaction since H₂ and O₂ combined to produce a single product i.e H₂O
Learn more about synthesis reaction:
https://brainly.com/question/24936069
What property is used to calculate the ph of a solution
A. The hydrogen ion concentration in mol/L
B. The hydrogen ion concentration in ppm
C. The hydrogen ion concentration in mg/dL
D. The hydrogen ion concentration in mol/kg
help if u help ill give you a rhino
Final answer:
The pH of a solution is calculated using the hydrogen ion concentration in mol/L (molarity) by taking the negative logarithm of that concentration.
Explanation:
The property used to calculate the pH of a solution is A. The hydrogen ion concentration in mol/L. To calculate pH, we first measure the concentration of hydrogen (H+) ions in moles per liter (molarity). Then, we take the negative logarithm of this concentration to find the pH value. For instance, a concentration of 0.01 M H+ ions results in a pH of 2 because the negative log of 0.01 is 2. The pH scale typically ranges from 0 to 14, with 7 being neutral. A pH less than 7 indicates an acidic solution, while a pH greater than 7 indicates a basic solution.
Can a chemical reaction happen with only one substance? For example, if you select water as the first substance but you don't add another substance, will a chemical reaction happen or not?
Explanation:
Yes, a chemical reaction can happen with only one substance.
A typical example of such reaction is the radioactive decay.
Radioactive decay is the loss of elementary particles from an unstable nucleus, ultimately changing the unstable element into another more stable element. .
When radioactive elements are let alone, they decompose to form stable harmless elements.
An example of radioactive decay is attached in the image below;
Answer:
No
Explanation:
A chemical reaction cannot happen with water alone. This is because, a chemical reaction must involve collision of particles from different reactants in order to give a product. No chemical specie can react with itself without some kind of interaction with another chemical specie which may or may not enter into the rate equation for that reaction.
Only nuclear reactions are spontaneous and involve only one reactant for spontaneous radioactive decay.
I swear is it just me or I struggling with science!
help
Explanation:
The term mutualism refers to a relationship in biology or sociology that is mutually beneficial to two living things. This relationship can be within the species, between living things from two different species, between individuals in a society and between two societies.The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed.when organisms compete for resourcesto get waterplease like and Mark as brainliesthow many grams of Fe can be produced if 12 mol CO and 12 mol Fe2O2 are allowed to react?
3CO(g) + Fe2O3(s) ----> 2Fe(s) + 3CO2(g)
Answer:
Assume that:
n = number of moles
m = mass of substance
M = molar mass (equivalent to atomic weight in the periodic table)
n
=
m
÷
M
The mass (m) of Fe is found.
Your next step is to find the molar mass (M) of Fe.
The molar mass of Fe is 55.9 g/mol.
To find the number of moles for Fe:
n = 112 grams
÷
55.9 g/mol = 2.003577818 moles of Fe(don't round because this is not your final answer or you'll get inaccurate final answer)
Hope it helps you
Plz mark brainliest and follow me ❤❤❤❤
Explanation:
what is a cause of cemical weathering?
A. sunlight
B. wind
C. gravity
D. acids
Answer:
D. acids
Explanation:
I hope this helped
According to cell theory _____.
Answer:
Every single living thing are comprised of cells. Cells are the fundamental units of structure and capacity in living things. New cells are delivered from existing cells.
If 75 ml of water is added to 125 ml of a 0.45 M NaOH solution. what will be the molarity of the diluted solution be?
Vouransion
Answer:
2.25M
Explanation:
C1V1 = C2V2
25×C1 = 125 × 0.45
C1 = 125×0.45/25
C1 = 2.25M
CaCl2 + Na2CO3 → CaCO3 + 2 NaCl
1. How many moles of calcium carbonate (CaCO3) are produced when
8.45 moles of calcium chloride react (CaCl2)? *
Answer:
8.45 moles are produced
Explanation:
CaCl₂ + Na₂CO₃ → CaCO₃ + 2 NaCl
From the equation, we can see that for every 1 mole of CaCl₂ and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl
to calculate how many moles of CaCO₃ ,we simply multiply multiply each by the 8.45 moles of CaCl₂ which will reacts
these is because for every 1 mole of CaCl₂ and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl
therefore we have every 1x8.45(8.45) mole of CaCl₂ and 1x8.45(8.45) mole Na₂CO₃ will give 1x8.45(8.45) mole of CaCO₃ and 2x8.45(16.9) moles of NaCl
8.45 moles are produced in the reaction
Answer:
8.45 moles
Explanation:
The balanced equation for the reaction is given below:
CaCl2 + Na2CO3 → CaCO3 + 2NaCl
From the balanced equation above,
1 mole of calcium chloride (CaCl2) produced 1 mole of calcium carbonate (CaCO3).
Therefore, 8.45 moles of calcium chloride (CaCl2) will also produce 8.45 moles of calcium carbonate (CaCO3)
From the illustration above, 8.45 moles of calcium carbonate (CaCO3) are produced.
1. List the three states of water shown here.
Answer: solid,liquid & gas
Explanation:
Three states of water
Water in the solid state e.g Ice block
Water in the liquid state e.g fluids
Water in the gaseous state e.g vapour
Which electromagnet is stronger and why?