Answer:
I believe it would be the last 2
Explanation:
the 4th one is magnesium and something else but that's with decomposition and so is the last one. the first three has water and oxygen and stuff that doesn't rly do decomposition
1. Which of the following are biotic factors in an ecosystem? *
O Rain, sunlight, and plants
O Plants, animals, bacteria
O Temperature, animals, plants
O Animals, minerals in the soil, rain
Answer:
plants animals bacteria
Giving brainliest, please HELP!
Answer:
C!
Explanation: Makes since brainlist please!
Which of the following is a property of water?
Will give brainliest!
Which of the following is the molecule with highest number of covalent bonds?
1.O2
2. N2
3. NH3
4. CO2
which of the following pairs would have larger size ? Explain your answer
a) k or k+
b) Br or Br-
c) O2- or F-
Answer:
k
br-
o2- ion
Explanation:
a/k ion has a larger size than k+ ion bc of the size of the radius it is always smaller compared to the parent ion .
b/bc it is an anion and it always has a large size compared to the parent ion (the same thing as the first one)
c/both the anions are isoelectornic species .Since the nuclear charge of O2- ions is small,its size is therefore more than the F- ion
Why can ionic table salt and covalent rubbing alcohol both dissolve in water?
Answer:
please don't trust those scam links
Given the following reaction: 2NH3(g) + 3Cl2(g) → N2(g) + 6HCl(g)? How many grams of chlorine must react to produce 16 L of nitrogen gas at 1.2 ATM and 23 °C?
Consider the N₂ gas produced:
Pressure, P = 1.2 atm
Volume, V = 16 L
Gas constant, R = 0.08206 L atm / (mol K)
Temperature, T = (273 + 23) K = 296 K
Gas law: PV = nRT
Then, n = PV/(RT)
No. of moles of N₂, n
= 1.2 × 16 / (0.08206 × 300)
= 0.79 mol
According to the given equation, mole ratio Cl₂ :
N₂ = 3 : 1
No. of moles of Cl₂ needed
= (0.79 mol) × 3
= 2.37 mol
Mass of Cl₂ needed
= (2.37 mol) × (35.5 × 2 g/mol)
= 168 g
Interview with tom zambrano why does tom zambrano think that renewable energy science is a good choice for a career?
Zambrano thinks that renewable energy science is a good choice for a career it reproduciable and eco friendly
What is Renewable Energy
Renewable energy science can be defined as the study of the various types of energy that can be reproduced even after been deplited.
Examples of renewable energy is the Solar, Wind, Geothermal Enegy etc.
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This Is the sample response on edge:
There will many opportunities in the field of renewable energy science and engineering. It is an exciting field, with a lot of variety and room for new ideas.
- Have it on edge, Have a good day :)
can waves travel through empty space? why?
Answer:
Elctromagnetic waves can travel through empty space.
Explanation:
Waves that may pass through matter or empty space are known as electromagnetic waves. The electromagnetic field, like the other basic fields, penetrates the whole universe, including the region we refer to as empty space. There are no fields in space. The medium through which electromagnetic waves travel is called the electromagnetic field.
What else can you use besides vinegar for dying eggs?.
You can use lemon or lime juice as a 1 to 1 replacement for vinegar in egg dye recipes.
For example, if the recipe calls for 1 teaspoon (4.9 mL) of vinegar, use 1 teaspoon (4.9 mL) of lemon or lime juice.
You can use fresh or bottled lemon or lime juice. Both will work the same way.
Hope this helps :))
Who developed the first scientific atomic theory?
Answer:
John Dalton
Explanation:
John Dalton (1766-1844) is the scientist credited for proposing the atomic theory. This theory explains several concepts that are relevant in the observable world.
map
What is a possible elevation for point X?
Question 5 options:
1750 m
1550 m
1650 m
1701 m
Answer: 1650 hope i got it in time.
Explanation:
Answer:
C
1650
Explanation:
Verified Answers With Verified Results
An unknown substance is found to have a high melting point. In addition, it is a poor conductor of electricity and does not dissolve in water. The substance most likely contains
Answer:
It contains lonic crystals
Explanation:
If the order of a reaction with the regard to reagent A is 2, when the concentration of A doubles, the rate will
Answer:
Rate will double
Explanation:
Since the concentration of A is doubling the rate of reaction will also double, since in this scenario concentration is proportional to rate of reaction. So if the concentration of A were to triple the rate of reaction would also triple.
Describe the properties of the transuranium elements.
Nuclear properties. Isotopes of the transuranium elements are radioactive in the usual ways: they decay by emitting alpha particles, beta particles, and gamma rays; and they also fission spontaneously. The table lists significant nuclear properties of certain isotopes that are useful for chemical studies.
hope this helps
Give an example of a change that the ecosystem was able to recover from and return to equilibrium.
Answer:
The Fox is at the top of the food chain; so, the other animals could increase in population and the fox could return
Moderate drought is an illustration of a shift that the prairie ecosystem was able to adapt to and return to balance. The amount of water that is accessible to both plants and animals reduces during a drought, which affects both plant development and the number of herbivores.
A forest ecosystem can recover from fire because diverse creatures play distinct functions in various ways and locations. Many species' dispersed habitats enable them to resprout or grow from seeds that are ignited by fire, protecting populations from being entirely wiped off.
Ecosystems are living things that are susceptible to a wide range of abiotic and biotic perturbations brought on by the forces of nature and/or human activities.
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Which of the designations are accurate for the fatty acid?.
Answer:
Fatty acid is considered unsaturated if it contains at least one double bond. It is called monounsaturated if it contains one double bond and polyunsaturated if it contains more than one double bond.
Explanation:
i hope i helped you
The specific heat of a substance is the amount of energy needed to raise the temperature of:.
the specific heat capacity is the energy needed to raise the temperature of 1kg of that substance by 1 degree
How many grams of oxygen gas occupy 12.3 L of space at 109.4 kPa and 15.4oC?
Show all work and include units for each number.
Use sig fig rounding on your answer.
17.93 grams of oxygen gas occupy 12.3L of space at 109.4 kPa and 15.4°C. Details about how to calculate mass can be found below.
How to calculate mass?The mass of a given gas can be calculated by multiplying the number of moles of the substance by its molar mass.
However, the number of moles of the gas must be calculated first as follows:
PV = nRT
Where;
P = pressure = 1.0796941atmV = volume = 12.3Ln = number of molesT = temperature = 288.4K R = gas law constant = 0.0821 Latm/molK1.079 × 12.3 = n × 0.0821 × 288.4
13.27 = 23.68n
n = 13.27/23.68
n = 0.56mol
Mass = 0.56 × 32
mass of oxygen gas = 17.93g
Therefore, 17.93 grams of oxygen gas occupy 12.3L of space at 109.4 kPa and 15.4°C.
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Convert 2500 calories to kilocalories or nutritional calories
Answer:
2.5 kilo calories
Explanation:
1 Calories = 0.001 Kilocalories
10 Calories = 0.01
Kilocalories 2500
Calories = 2.5 Kilocalories
Answer:
2.5 kilocalories.
Explanation:
2500 divided by 100 to get to kilo is 2.5
I need help ASAP!!!!!!!!!!!!!!!!!!!
last one? don't take my word though
Explanation:
the suns heat is related to nuclear fusion
The brain and spinal cord work together to allow the body to think and react to the environment.
What is the spinal cord?
a cell
a tissue
an organ
an organ system
Answer:
B . a tissue
Explanation:
SnO2 + 2H2Sn + 2H2O
If you form 42.5g of H2O from the above reaction, how many moles of H2 were present at
the start of the reaction
Answer: 2.36 moles
Explanation:
Using 1 g/mol for the atomic mass of hydrogen and 16 g/mol for the atomic mass of oxygen, we get that the gram-formula mass of water is 1(2)+16=18 g/mol. Thus, 42.5 grams of water is the same as 2.36 moles.
From the reaction, we know that for every 2 moles of water produced, 2 moles of dihydridotin are consumed. In each mole of dihydridotin, there is 1 mole of hydrogen, meaning that 2 moles of hydrogen are consumed.
Thus, the answer is 2.36 moles.
What is the final step in scientific polling?
A. interpreting the results
B. selecting the sample
C. presenting carefully worded questions
D. identifying the universe
Answer:select and control A. interpreting the results
Explanation:
g. Name a separating method for each of the question. (3)
I. Sodium chloride from the sodium chloride salt solution
II. Pure water from the sea water
III. Sand from the mixture of sand and salt solution
What is the Molecular Formula for Fiber?
Answer:
Description. Dietary fiber is mostly derived from the plant cell wall. It mainly includes cellulose, hemicellulose, pectic polysaccharides, oligosaccharides, resistant starch, and lignin.
Explanation:
I hope help you and thanks for heart and rate my answer
Explain what "LEO the lion goes GER" means based upon what you have learned
"LEO the lion goes GER" means based upon the oxidation and reduction reactions.
What is oxidation and reduction reaction?Oxidation reactions are those reactions in which lossing of electrons are taking place from the substrate molecule and in reduction process gaining of electrons is done by substrate molecules.
The phrase "LEO the lion goes GER" is used in the context of oxidation and reduction reactions. Meaning of the terms:
LEO → Lose electrons = oxidation
GER → Gain electrons = reduction
Hence the given line is based on oxidation and reduction.
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Answer:
Leo: lose electron(s) = oxidation. Ger: gain electron(s) = reduction.
Explanation:
Devices that are made to replace injured or damaged body parts are called
• A. Prosthetic devices
• B. Scaffolds
C. Genetically engineered devices
D. Artificial intelligence
Answer:
Prosthetic Devices
Explanation:
I’m a genius and it’s the answer :D
A 748 L hot air balloon sits on a table at 26.7oC. If the balloon is heated to 48.3oC, what is the new volume?
The new volume of the hot air balloon is 801.9L.
As the temperature of the hot air balloon on the table is increased, the its volume also increases.
Charle's lawCharle's law states that the volume of an ideal gas is directly proportional to the absolute temperature provided pressure is kept at constant.
It is expressed as;
V₁/T₁ = V₂/T₂
Given the data in the question;
Initial volume V₁ = 748LInitial temperature T₁ = 26.7°C = 299.85KFinal temperature T₂ = 48.3°C = 321.45KFinal volume V₂ = ?To calculate the new volume we subtsitute our given values into the expression above.
V₁T₂ = V₂T₁
V₂ = V₁T₂ / T₁
V₂ = ( 748L × 321.45K ) / 299.85K
V₂ = 240444.6LK / 299.85K
V₂ = 801.9L
The new volume of the hot air balloon is 801.9L.
As the temperature of the hot air balloon on the table is increased, the its volume also increases.
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How many grams of nickel would be electroplated by passing a constant current of 7.2 A through a solution of NiSO4 for 90.0 min
The amount of nickel that would be electroplated by passing a constant current of 7.2 A through a solution of NiSO₄ for 90 min is 11.83g.
How much charge will be deposited by equivalent mass?Equivalent mass of any substance will be electroplated by 96485 coloumb of charge.
Equivalent mass of Ni in NiSO₄ = 58.7/2 = 29.35g
So that 96485 coloumb of charge = deposited 29.35g of Ni
Also charge will be calculated by usimg the below equation as:
Q = (I)(t), where
I = current = 7.2 ampere
t = time = 90 min = 5400 sec
Q = (7.2)(5400) = 38,880 coloumb
By using both the equations of coloumb, we calculate the grams of Ni electroplated by 38,880 coloumb charge as:
Mass of Ni = (29.35g)(38,880/96,485)
Mass = 11.826 grams = 11.83g
Hence required mass of nickle is 11.83 grams.
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