The students study the equations for the reactions of Na and Mg with H2O to explain the outcomes of the reactions. Which observation would provide the best evidence that matter is conserved in the reaction of Na and H2O?

A The number of atoms of Na is the same on both sides of the equation.

B The number of electrons and protons in Na is equal to the number of electrons and protons in H and O.

C The mass of Na and H2O that reacts is greater than the mass of H2 produced.

D The mass of NaOH produced is equal to the mass of H2O that is changed into steam as the Na explodes into flames.

Answers

Answer 1

Answer:

A is the corret answer

Explanation:

The number of atoms of na is the same on both sides


Related Questions

what is role of degenerating corpus luteum if fertilisation takes place in the Fallopian tube?​

Answers

Explanation:

the main purpose of the corpus luteum is that it pulses out hormones, including progesterone. But if the egg isn't fertilised, the corpus luteum stops secreting progesterone.

____, which can be natural or artificial, are chemical substances added to food to slow the growth of the microorganisms that cause food to spoil.

Group of answer choices

Preservatives

Alcohols

Esters

Herbicides

Answers

Answer:

Preservatives

Explanation:

How do matter and energy interact in a food web or energy pyramid model?​

Answers

Answer: The higher up the pyramid the less energy there is.

Explanation: There is more competition

Answer:

At each link upward in a food web, only a small fraction of the matter consumed at the lower level is transferred upward, to produce growth and release energy in cellular respiration at the higher level. ... At each link in an ecosystem, matter and energy are conserved.

Explanation:

Gases in the air that are present in very small amounts are called ______
gasses.

Answers

Answer:

trace

Explanation:

The number of different species and the number of individual organisms describes...

A. An ecosystem

B. The biome

C. The biodiversity

Answers

The number of different species and the number of individual organisms describes the biodiversity

1. Which of the following is NOT a key factor important to the development of human society?
A. Access to clean water
B. Access to fertile soil
C. Access to cities
D. Access to natural resources

Answers

C., it’s the only answer that doesn’t include basic human needs.

Access to cities is not a key factor important to the development of human society, but clean water, fertile soil, and Access to natural resources all are needed, hence option C is correct.

What are factors important to the development of human society?

The preagricultural (hunting and gathering) stage, the agricultural stage, and the industrial stage are thus the at least three primary stages of societal evolution or civilizations.

Clean water is essential to our way of life because it creates a habitat for species and places to fish, paddle, surf, and swim. Our economy is reliant on clean water to operate and thrive. This includes industries like manufacturing, agriculture, tourism, recreation, and energy generation.

They support tax revenue, income, and the fight against poverty. Natural resource-related industries generate employment and frequently form the backbone of poorer towns' economies.

Therefore, natural resources are fundamentally important, so they must be managed responsibly.

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Which of the following organisms on the food web shown above is a primary consumer

A: duck
B: rabbit
C frog
D green plants

Answers

Answer:

rabbit

Explanation:

Light rays from an object are refracted by the what?

Answers

Answer:

Explanation:

glass i think

Any incident ray traveling parallel to the principal axis of a converging lens will refract through the lens and travel through the focal point on the opposite side of the lens. Now suppose that the rays of light are traveling through the focal point on the way to the lens.

Question 5

5 pts

Jonathan consumes five 12 ounce beers throughout the day. How many additional

calories has he added to his diet?

710 kcals

630 kcals

490 kcals

280 kcals

Answers

The given options must be in the calories in approximate value.

Answer:

The best answer is - 710 calories approximately.

Explanation:

One ounce of the beer provides 12 calories and as it is given that Jonathan drinks five 12 ounce beers throughout the day then,

12 ounce = 12 × 12 × 5

=  144 × 5

= 720 calories

Thus,  it is found out that he has added 710 calories approximately to his diet additional.

What is classification

Answers

Answer:

the action or process of classifying something according to shared qualities of characteristics

Explanation:

Parents pass traits to their offspring through____? *

Answers

heredity duehvaiabshsvshba

Which of the following structures help the cell remove wastes:

A: Vesicles
B: Mitochondria
C: Golgi Complex
D: Endoplasmic Reticulum

Answers

Answer:

Vesicles help the cell remove wastes

Answer:

Lysosomes break down waste products within the cell and transport the remains out of the cell. They contain enzymes that help them do this.

Explanation:

i hope you understand

What do we call people who donate plasma?

Answers

Answer:

If I remember correctly we call them blood donors.

Explanation:

I hope this helped.

Bye!

They make up just 2 in 50 people, their plasma is universal. This means their plasma can be used by anyone. At noncommercial donation sites, people can donate plasma every 28 days, up to 13 times a year.

PUNTOS POSIB!
25 Zoogeographic regions are characterized by the presence of specific groups of animals. These
regions are determined by the taxonomic or phylogenetic relationships of animals. The map
shows the zoogeographic regions proposed by the naturalist Alfred Russel Wallace in 1876.
Zoogeographic Regions
Nearctic
Palearctic
Ethiopian
KEY
Neotropical
Geographical barriers
such as mountains or
bodies of water
Australasian
The similarities of organisms in which two areas numbered above provide the best evidence
for common ancestry between the organisms in both locations?
O 5 and 6

Answers

Answer: Well, lets think about it they both have common ancestry . Two common things you can take is you can ask yourself what different parts one has and what one does not have to find the answer. for any more help let me know!

Explanation: Have a great day :)

A punnet square is used to determine what?

Answers

Answer:

predict genotypes

Explanation:

Answer: genotype

Explanation: A Punnett Square is a helpful tool that helps to predict the variations and probabilities that can come from cross-breeding. This includes predicting crossing plants, animals, and even humans with each other.

In the following DNA sequence: CCC ATG GAG what do the T and C represent?

Answers

Answer:

T represents Thymine

C represents Cytosine

A represents Adenine

G represents Guanine

Explanation:

If you have anymore question just let me know :)

T represents Thymine, C represents Cytosine, A represents Adenine and G represents Guanine.

What is the structure of DNA?

Humans and nearly all other species carry their genetic information in DNA, also known as deoxyribonucleic acid. The DNA of an individual can be found in almost all of their cells.

Deoxyribonucleic acid (DNA) is made up of the four nucleotides A, C, G, and T. These nucleotides are linked together by a backbone made up of alternating phosphate and deoxyribose sugar residues. The complementary pairs of these nitrogen-containing bases are governed by their capacity to generate hydrogen bonds.

DNA is located inside the nucleus, a specific region of the cell, in eukaryotic species.

Therefore, chromosomes are the name for this DNA that has been packed.

 

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What do the components of the skeletal system allow a
person to do?

Answers

The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals.

why doesnt photosynthesis occur in the deep ocean

Answers

Answer:

hey

Explanation:

There is no sunlight is the answer as photosynthesis occurs in the presence of sunlight only with the help of Chlorophyll.

-brainly

The ocean is very, very deep; light can only penetrate so far below the surface of the ocean. As the light energy travels through the water, the molecules in the water scatter and absorb it. ... In the aphotic zone; all that's left of sunlight is a dim, dark, blue-green light, too weak to allow photosynthesis to occur.

What percentage of mass of human body is made up of oxygen

Answers

Answer:

65% of oxygen

Explanation:

To name a few: Oxygen-65%, Carbon-18%, Hydrogen-10%

Answer: I believe the percentage of mass in human body that is made up of oxygen is 61% or something like that but I'm not sure.

is anyone dominant for every trait is anyone recessive for every trait if not what does this show about dominace and recesssiveness of traits in people

Answers

There are traits assigned weather they are dominant or recessive. Ex. Brown hair is dominant. Blonde hair is recessive. Brown eyes are dominant, blue eyes are recessive

In fish, having two fins (F) is dominant over having pne fin (t).
Complete the punnett square to show a cross between a
heterozygous two finned fish with a one finned fish. What are
the genotype and phenotype possibilities?

Answers

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

4. Though all humans start off the same way, give a brief explanation about what make us all so different

Answers

Answer:

knolage and past experiences

Explanation:

what makes humans so different is how we were born and rained so 2 hummers were born and raised in the same way

.When animals breathe, they take in oxygen and give off carbon dioxide. How is photosynthesis like or unlike this process?

Answers

One of the first things taught in biology class is that animals breathe in oxygen and exhale CO2, while plants take in CO2 during the day and release oxygen. In a process called “photosynthesis,” plants use the energy in sunlight to convert CO2 and water to sugar and oxygen.

Once they have carbon dioxide and water, they can use solar energy to create food. Another gas called oxygen is a by-product of the production of plant nourishment. The leaves emit this oxygen into the atmosphere.

What animals breathe, take in oxygen give carbon dioxide?

The act of breathing in oxygen and exhaling carbon dioxide is generally referred to as respiration. The phrase is more precisely used to describe the chemical process that organisms undertake to extract energy from food, a process that normally entails the inhalation of oxygen and exhalation of carbon dioxide.

Therefore, One of the first concepts covered in biology class is that, whereas plants absorb CO2 throughout the day and release oxygen, animals breathe in oxygen and exhale CO2. Plants use the energy from sunlight to transform CO2 and water into sugar and oxygen through a process known as “photosynthesis.”

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1. In the process of (selective breeding / natural selection/hybridization/

DNA replication), plants or animals with desired traits are mated. By repeating

the process over many generations, useful plant strains or animal breeds are

developed. The process is an example of (bioremediation / natural selection /

biotechnology / feedback inhibition).

Answers

Answer:

selective breeding; biotechnology

Explanation:

Selective breeding is a type of artificial selection that consists of crossing plants/animals with desirable and heritable phenotypic traits in order to increase the frequency of such traits in progeny. Selective breeding can be considered as one of the first biotechnological techniques applied by humans. In the past, the selective breeding technique has allowed obtaining domesticated animals (e.g., dogs from wild wolves) and domesticated crops from their wild ancestors (e.g., maize from its wild ancestor teosinte).

What are 2 major concerns about copper mining?

Answers

Answer:

Land degradation. Increased deforestation. Water and air pollution from particles of sulphuric acid, which severely affect those residing near mines.

hope this helps and please give brainliest!

These include taxes and royalties, relations with workers, local communities and environmental groups, resource nationalism, and political and legal instability. In that respect, the problems in the copper industry are like those that have held back oil production outside North America.

i dont know what to do for this​

Answers

Answer:

1. find the temperature in the area for longitude.

2. fine the times, and record them

Explanation:

Helppppp please What characteristic of water
means that clear water is not
necessarily clean water?
A. the density of the water
B. high specific heat capacity
C. the temperature of the water
D. ability to act as a universal solvent

Answers

Answer:

B

Explanation:

Ability of water to act as a universal solvent means that clear water is not necessarily clean water. Therefore, option (D) is correct.

What is clean water?

Clean, safe water is defined by the USGS as "water that won't hurt you if you come in touch with it." Although drinking water is often mentioned when discussing clean water, clean water is also crucial for all residential uses.

It is impossible to smell, taste, or even see the microscopic contaminants that pollute water, such as bacteria, viruses, and parasites. Therefore, just because your water is clear doesn't imply it's okay to drink.

Therefore,  due to the fact that water is a universal solvent, meaning that it is capable of dissolving a wide range of substances with relative ease clear water is not considered clean.

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I needhelp with this plzzz

Answers

Answer:

you just need to create a hypothesis using the scientific enquiry and then put a fluid and try to find out the answer.

...........................................

Answers

Answer:

...............................................................................................................

Identifying Structures and Functions of the Brain Identify the structures of the brain. Label A Label B

Answers

200 is the address of your business

FIRST PART:

✔ Cerebellum (Lable A)

✔ Brain stem (Label B)



SECOND PART:

✔ Cerebellum

helps in coordination and balance

✔ Hippocampus

involved in memory formation and recall

✔ Brain stem

is responsible for involuntary processes such as breathing, swallowing, and blood circulation

Explanation: The other is wrong and didnt even try but these are the right answers on edge......hope this helps!! :D

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