What are the five evidences that a chemical change has taken place ?

Answers

Answer 1

Answer:

Odor, temperature change, precipitate formation, production of gas bubbles, and a color change!

Explanation:

No explanation needed really.


Related Questions

What is displacement of metals?

Answers

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Featured snippet from the web
Displacement reactions. Displacement reactions occur when a metal from the electrochemical series is mixed with the ions of a metal lower down in the electrochemical series. The atoms of the more reactive metal push their electrons on to ions of the less reactive metal. An example can be seen below.
It occurs when a metal from the electrochemical series is mixed with ions of a metal lower down in the electrochemical series.

The high temperature on Friday was 8 degrees above zero. The low temperature was 3 degrees below zero. Which expression gives the average of the low and high temperatures?

a
Left-bracket negative 3 + (negative 8) right-bracket divided by (2) Right-bracket

b
(negative 3 + 8) divided by 2

c
(negative 3 + 8) divided by (negative 2)

d
Negative (3 + 8) divided by 2

Answers

Answer:

B

Explanation:

The negative goes by the 3 because it is 3 degrees below zero. To find averages, you add the numbers and divide by how many numbers there are. in this case, it would be (-3+8)/2

what systems do you use when you have a scrape knee

Answers

Answer:

cleaning alcohol. polisporin. and bandades

Explanation:

Answer:

You use the immune system

Explanation:

it play a crucial role in the process of wound healing

Matter at rest will:
A. gain Mass
B. Stay at rest
C. Move on its own
D. Gain kinetic energy​

Answers

Answer:

D. Gain kinetic energy

Which of following are natural factors that can cause extinctions?


I. climate change

II. asteroid impacts

III. volcanic eruptions

IV. changes in oxygen levels in seawater

A.

I, II, III, and IV

B.

I, II, and III only

C.

II and III only

D.

I and IV only
i need help asap

Answers

Answer:

A is the answer. so it's correct

Where is DNA located in your body?

Answers

Answer:

DNA is in the nucleus of nearly every cell in your body.

Explanation:

DNA is housed in the nucleus because it is the genetic material and needs to be protected.

Answer:

The DNA is located in the nucleus.

Explanation:

Humans and animals are EUKARYOTES which means we have a nucleus, where the DNA is stored. PROKARYOTES do not have a nucleus to the DNA is stored in the cytoplasm.

~Anna

A carbohydrate is broken down into smaller sugars, this is an example of what type of energy?

A.chemical
B.mechanical
C.sound
D.nuclear

Answers

The answer is: A
Chemical energy

Provide a summary of biologist Stephen Stearns’ findings in how Natural Selection may be working today in humans.

Answers

Answer:

Stephen Stearns states that natural selection doesn't mean the survival of the fittest organisms, but rather this mechanism is illustrated by the selective reproduction of the fittest. Natural selection can be classified into distinct types, including directional, disruptive and stabilizing selection, which are in turn based on sexual selection. These types of selection are driven by different outcomes that have different dynamics.

In ecology, what is meant by the term "community"?​

Answers

Answer:

A community is a ecosystem without the abiotic features such as lakes, rocks and the sun. It consists of only populations of species.

Answer:

In ecology, a community is a group or association of populations of two or more different species occupying the same geographical area at the same time, also known as a biosynthesis.

Explanation:

2. What are the two types of ecological succession?

Answers

Answer:

There are two main types of succession, primary and secondary. Primary succession is the series of community changes which occur on an entirely new habitat which has never been colonized before. For example, a newly quarried rock face or sand dunes.

Explanation:

Answer:

Ecological succession is a process of change in ecosystems that takes place over time, and that we can observe both in time and in space. ... There are two types, the primary sequence and the secondary sequence.

"I hope it helps you it was a pleasure to help you".

Explanation:

33 indica si las siguientes frases son verdaderas o falsas y corrige las falsa A) la competencia es una relación exclusivamente interespecífica B )los parásitos pueden matar al huésped C ) las poblaciones gregarias son aquellas en las que existe una jerarquía entre los individuos D) en las poblaciones coloniales individuos de distintas especies crecen unidos entre sí E) En las relaciones de mutualismo y comensalismo una de las especies resulta indiferente a la relación F) La cooperación entre individuos beneficia tanto a estos como a la población G) La simbiosis es una relación beneficiosa para ambas especies

Answers

The answers to these question are the following:

A) False

B) True

C) False

D) False

E) False

F) Flase

G) True

Explanation:

A) Competency can also be intraspecific

B) Parasites often cause the death of their hosts

C) There are gregarious organisms whose populations have no defined hierarchies

D) Colonial populations may be formed by organisms from the same species  

E) Mutualism is a beneficial association for both species

F) Not necessarily, there are cases where this type of association only benefits to individuals

F)  Symbiosis is the association among organisms from different species that benefits both species

Which resource is a renewable resource?
A. Coal
B. Gemstones
C. Metal
D. Trees

Answers

the answer is d. tress

Answer:

d. trees

Explanation:

cuz i took the quiz on edge

WILL MARK BRAINIEST PLS HELP!
Using the traits and alleles from this chart, indicate the possible genotype(s) for the following plants:
22. Homozygous wrinkled ……………………………………………………………..
23. Homozygous round …………………………………………………………………..
24. Round heterozygous…………………………………………………………………..
25. Green hybrid…………………………………………………………………..
26. Heterozygous green pods…………………………………………………………………..
27. Yellow pods…………………………………………………………………..
28. Short stems…………………………………………………………………..
29. Tall stems…………………………………………………………………..
30. Yellow seeds…………………………………………………………………..
31. Pure tall stem ………………………………………………………………….
32. Homozygous tall stem…………………………………………………………………..
33. Heterozygous tall stem…………………………………………………………………..

Answers

Answer:

look below

Explanation:

22. rr x rr

23. RR x RR

24 Rr x Rr

25. ??

26. Gg x Gg

27. gg x gg

28. ll x ll

29. Ll x LL

30. YY x YY, Yy x Yy

31. LL x LL , Ll x Ll

32. LL x LL

33. Ll x Ll

The pH of a solution determines the charge of certain R groups. The pH of pineapple fruit ranges from 3.5 to 5.2. Predict the effect on the activity of bromelain if it is used in a product with a pH of 11.

Answers

Answer:

The activity of Bromine will reduce

Explanation:

Bromine is found in pineapple stem with pH range of 3.5- 5.2 this implies that the environment where bromine is found is acidic hence when taken to a product whose pH is 11 which is basic then its performance will be low because its can only function well in an acidic medium.

pH ranges tell whether a substance is acidic, basic or neural.

Acid range from 3.5-6

7- neutral

8 above is basic

This is about knowing the behaviour of some elements in different PH Values.

The activity of bromelain will decrease in a product with a pH of 11. .

We are told that the PH of pineapple fruit is of the range of 3.5 - 5.2. In reality, this also includes it's stems and the plants as well. This falls into the acidic range because PH less than 7 is acidic.Now, these stems, plants and fruits of pineapple usually contain bromelain. This implies that bromelain does its' work in an acidic environment since pineapple has an acidic PH.

If bromelain is used in a product with a PH of 11, it means it is being used in a basic environment because a PH greater than 7 indicates a basic nature. This means bromelain will not function as well as it did in the acidic environment and as such the activity of bromelain here would decrease.

We can now conclude that the activity of bromelain will decrease in a product that has a PH of 11.

Read more at; https://brainly.com/question/6904846

Help.. 14 _____ are substances that can cause cancer.
15
Scientists join cancer cells with antibody-producing white blood
cells to produce _____.

Answers

Answer:

14. Carcinogenic

15. Not sure. I believe it is monoclonal antibodies.

5 PLZ HELP 12points+
Select the correct answer.
If the population of rabbits in this ecosystem decreased dramatically because of certain environmental changes, which organisms’ food supply would decrease?

A.
owl and snake
B.
jackal and wildcat
C.
green plant and mouse
D.
goat and wildcat

Answers

Answer: B, the jackal and wildcat

Why is the nitrogen cycle important for the survival of organisms in an ecosystem? A. The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms. B. The nitrogen cycle keeps organisms from consuming nitrogen in their ecosystem. C. The nitrogen cycle allows all organisms in an ecosystem to consume nitrogen instead of consuming each other. D. The nitrogen cycle stores nitrogen in safe places, keeping it from entering an ecosystem.

Answers

Answer: A.) The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms.

Explanation: Nitrogen is an essential nutrient for plants and a significant component of proteins, which all animals need to grow, reproduce and survive. The nitrogen cycle converts nitrogen into compounds that plants and animals can use.

Which explanation below is the most accurate regarding animal and plant adaptations for survival in a desert biome

Answers

Answer:

i think its C sorry if I'm wrong

Explanation:

The most accurate regarding animal and plant adaptations for survival in a desert biome is

Animals in this biome tend to have scaly skin to save water and stay cool; plants have thick roots that capture water.

What is the desert biome?Deserts are extremely dry environments that support a diverse range of plants and animals. Deserts are classified into four types: hot and dry deserts, semi-arid deserts, coastal deserts, and cold deserts.Plants adaptationPlants in the desert are succulent, storing water in fleshy leaves, stems, or roots. Water absorption is well developed in the root system. The stem in these pants also performs photosynthesis. Their stems and leaves have a thick cuticle that protects them from excessive transpiration. To avoid excessive water loss, desert plants use the CAM pathway.Animals adaptationAnimals in the desert exhibit a variety of adaptations. Snakes, for example, come out in the open only at dawn or dusk. To avoid the heat, some small desert animals live in burrows.Camels, for example, store fat in their hump. This allows them to go a long time without food or water.

Thus, we can conclude that Animals in this biome tend to have scaly skin to save water and stay cool; plants have thick roots that capture water. which is option C.

You can learn more about the desert biome here:

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During photosynthesis blank energy is converted into blank energy

Answers

Answer:During photosynthesis solar energy is converted into chemical  energy

Explanation:

i think this is pretty easy so fill in the blanks and i’ll give you 15 points

Answers

Answer:

producers, energy, carbon dioxide, oxygen

which bone layer holds calcium and other minerals

Answers

Answer:

In addition to its mechanical functions, the bone is a reservoir for minerals (a "metabolic" function). The bone stores 99% of the body's calcium and 85% of the phosphorus. It is very important to keep the blood level of calcium within a narrow range. If blood calcium gets too high or too low, the muscles and nerves will not function. In times of need, for example, during pregnancy, calcium can be removed from the bones. This process is carefully regulated by hormones and is discussed more completely in the section about hormones.

Explanation:

Answer:

its the um (dont quote me ) phophorus im pretty sure

Explanation:

The cardiovascular system includes all of the following EXCEPT?
A.
Veins
B.
Arteries
C.
Capillaries
D.
Neurons

Answers

Answer:

D

Explanation:

The cardiovascular system does not include Neurons (D). The cardiovascular system is also known as the circulatory system..i think :/

Hope this helps, if it doesn't please let me know :)

Answer:

D, Neurons

Explanation:

cardiovascluar sysetm does not include neurons as neurons are molecules.

Choose an organism to use as an example.

Answers

Answer:

Bacteria

Explanation:

humans, plants, fungi and bacteria are a type of organism

WHO CAN HELP ME WITH MY HOMEWORK ILL GIVE 50 POINTS AND BRAINIEST :COMMENT ME IF U WANNA HELP

Answers

Answer:

yooo i gonna help

Explanation:

Answer:

Slatt.

Explanation:

Thanks For The Points Slime.

Which of the following molecules link together to form starch? A. Glucose B. Galactose C. Fructose

Answers

A : glucose molecules

If you drive at 100 m/s for 36,000 s how far will you go ?

Answers

Answer:

Distance = 3,600,000 m

Explanation:

Distance = Speed × Time

Distance = 100 × 36,000

Distance = 3,600,000 m

true or false aerobic cellular respiration produces more atp then anaerobic cellular respiration

Answers

Answer:

true

Explanation:

What do you think the word biodiversity means? Why is biodiversity important for the stability of ecosystems?

Answers

Biodiversity is the variety and variability of life on Earth. Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. Such as A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.

Answer:

Biodiversity refers to the variety of species in an ecosystem. Generally, ecosystems with high biodiversity are more likely to survive environmental changes. Therefore, biodiversity is important to ecosystem stability.

Suzy knows that an individual’s sex is determined by sex chromosomes. She knows that females have two X chromosomes and males have one X and one Y chromosome. She creates the Punnett square cross below to show sex inheritance. She wants to know which parent determines the sex of a baby---is it the mother, father, or both? Complete this cross. What would you tell Suzy? Why? Suzy knows that an individual’s sex is determined by sex chromosomes. She knows that females have two X chromosomes and males have one X and one Y chromosome. She creates the Punnett square cross below to show sex inheritance. She wants to know which parent determines the sex of a baby---is it the mother, father, or both? Complete this cross. What would you tell Suzy? Why?

Answers

Both. When you put xx and xy on a punnet square there are equal amounts male and female

She creates the Punnett square cross below to show sex inheritance. She come to know that both parent determines the sex of a baby and it is when you put xx and xy on a punnet square there are equal amounts male and female.

How Human sex gets decided?

Human sex gets decided by the function of SRY gene which possessed by with or without of Y chromosome. The hormone of anti-mullerian and testosterone produced from cells when activating the SRY gene. It generally confirms the development of single-male reproductive systems.

The scenario in humans, the sex ration gets affected by the male parent's hormone level. Also, in XY sex evaluation system, the sperm of male takes part in X or Y chromosome whereas the ovum from female contributes to X chromosome. This greatly results in offspring - either male (XX) or female (XY).

Therefore, She creates the Punnett square cross below to show sex inheritance. She come to know that both parent determines the sex of a baby and it is when you put xx and xy on a punnet square there are equal amounts male and female.

Learn more about Punnett square on:

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the following facts are true about resource A


. it grows in nature and takes about five years to reach a mature size.

.it can be replanted after it is cut down

resource A is most likely an.

A. inexhaustible resource

B. nonrenewable resource

C. recycled material

D. renewable resource​

Answers

Answer:

Option D, renewable resource

Explanation:

A renewable resource is the resource  which can be replenished after every use. Or in general the time taken by it to replenish must be small. For instance, fossil fuels too are renewable but the time taken by them to renew is too high and hence they are also considered as non-renewable.  

Also renewable resources can be used again and again.  

Hence, option D is correct

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