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Wood burning would be the one
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UselessWood burning is a chemical reaction
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Biology
Which is a chemical reaction? ice melting salt dissolving water vaporizing wood burning
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Wood burning would be the one
Chemistry
Im really desperate right now 20pts q1: select all the signs of a chemical change from the list below. (you may need to select more than one for full points) question 1 options: evaporating bubbles (gas formation) dissolving color change q2: which of the following is an example of a chemical reaction that you ve seen in your everyday life? question 5 options: fire burning ice melting salt dissolving water freezing q3: select all the signs of a chemical change from the list below. (you may need to select more than one for full points) question 1
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P Answered by PhD
Q1: Bubbles (gas formation)
Dissolving ( if solute is an ionic compound)
Color change
Q2: Fire burning
Salt dissolving
Q3: Bubbles (gas formation)
Color change
Dissolving ( if solute is an ionic compound)
Explanation:
Bubbles (gas formation)
Gas formation is mostly taken as an indicator for a chemical reaction, mostly in acid base reactions. Because when acid and base reacts water and carbon dioxide produces.
Dissolving of salt
Dissolving of salt in water is an example of a chemical change. Because when we put salt (NaCl) in water it changes into its ions (Na⁺ Cl⁻) by losing or gaining electrons. These Ions have totally different properties from the parent salt. So it is a chemical change.
Color change
Mostly we take color change as an indicator of a chemical change but it is not necessary. For example when we add two colors in a beaker its changes into a 3rd color without any chemical reaction.
Fire burning
Fire burning is an example of a chemical change. For example during wood burning, a chemical reaction takes place which changes the into ash and CO₂. the reactants and products have totally different properties.
History
Which is a chemical reaction? wood burning ice melting salt dissolving water vaporizing
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P Answered by Specialist 8
(Wood burning) is a chemical reaction
History
Which is a chemical reaction? wood burning ice melting salt dissolving water vaporizing
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P Answered by Master 8
(Wood burning) is a chemical reaction
Biology
Huntington s disease is a dominant allele disorder. While looking at his family s pedigree, Parker noticed that 64 out of his 100 relatives were affected by this disorder. What is the value of q? What is the value of 2pq? How many people are dominant in Parker s family pedigree? How many people are heterozygous in Parker s family pedigree?
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P Answered by PhD 3
Answer:
a) Value of q=60%
b) value of 2pq=0
c) people who are dominant in Parker's family pedigree =64
d) number of heterozygous in Parker's family pedigree= 0
Explanation :
p2 + 2pq + q2 = 1 and p + q = 1
p = frequency of the dominant allele in the population
q = frequency of the recessive allele in the population
p2 = percentage of homozygous dominant individuals
q2 = percentage of homozygous recessive individuals
2pq = percentage of heterozygous individuals
Biology
If instead of the producers having 2,500 kcal, it dropped to 250 kcals, how do you think that would aect the population of all of the consumers? Would the ecosystem still be able to sustain (maintain, keep) large numbers of hawks? Explain why or why not
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It would affect the consumer population as the producer will go down. The consumer number will go up and the ecosystem will not be able to sustain the large numbers of hawks as it follows 10% rule.
Biology
Help me pretty please …………………
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P Answered by PhD
Answer:
32) Commensalism
33) Secondary succession
34) Exponential growth
35) Renewable energy
36) Ionic bond
37) Exponential growth
Biology
The light for the tank has been on all day and Kai measured the carbon in the air and found that it is decreasing. How is carbon moving between the air and the living things in the tank? What is happening to the amount of carbon living things? Explain your thinking as completely as possible
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Answer:
Plants use carbon from the atmosphere, and animals eat the plants, so the amount of carbon in living things is growing.similarly in the tank this flow of carbon occurs.
Explanation:
A well-sealed tank, according to the question, contains air, plants, and animals.Plants can undertake photosynthesis because light can enter the tank.Through respiration, the living creatures in the tank emit carbon in the form of carbondioxide (CO2) gas.
In the presence of sunlight, plants utilise this carbondioxide (CO2) to produce carbon-containing food (glucose).This is referred to as PHOTOSYNTHESIS.
Animals consume the plants, and the carbon stored in them is transmitted to them.When animals respire , they release this carbon back into the atmosphere as carbon dioxide.
As a result, carbon in the tank flows from living things (respiration) to the air before returning to plants (photosynthesis).
Biology
How are the spearers and the smarhers alike?
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Answer:
While spearers and smashers are structurally similar, spearers differ in the tips of their arms (smashers use a closed club-like fist, while spearers use an open, barbed snare) as well as their hunting strategy.
They differ in the tip of their arms.
Biology
Which design solution for acquiring lithium to use in rechargeable batteries is more sustainable? 1) Mining lithium via hard rock mining.OR 2)Extracting lithium from salars (briny lakes)
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2) Extracting lithium from salars
Hard Rock mining is not sustainable as it impact the environment
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