How can you tell whether a change in matter is caused by a chemical reaction? ​

Answers

Answer 1

Answer:

Potential signs that chemical reactions have occurred include a change in color, change in temperature, formation of a gas, and formation of a precipitate.

Gas Bubbles Appear. Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas.

Formation of a Precipitate.

Color Change.

Temperature Change.

Production of Light.

Volume Change.

Change in Smell or Taste.

Explanation:

Hope this helps!


Related Questions

For what reasons do elected officials mostly use social media?

Answers

Answer:

Elected officials mostly use social media because most people are on social media.

Explanation:

The reasons are as follows.

Social Media is a large platform and many people are on the various platforms many times during a single day. So these officails can broadcast their information and hundreds and thousands of people will see it.

2
What kind of consumer activity would most likely be influenced by the Clean Air and Water Acts?
A.
tourism
В.
Internet spending
C.
savings
D.
charitable giving

Answers

The kind of consumer activity would be A. Tourism

the highest mountain in the world​

Answers

Answer:

Mt.Everest a.k.a Sagarmatha......

Mount Everest is the highest mountain above the water surface, but Mauna Kea is actually higher but mostly lies under the water.
;)

In which area of Canada is the population?

Answers

Answer: The majority of Canada's population is concentrated in the areas close to the Canada–US border.

Its four largest provinces by area (Quebec, Ontario, British Columbia, and Alberta) its most populous

Explanation:

One reason the declaration of independence is worded like the declaration of sentiments is to suggest that

Answers

Answer:

B. women's rights are just as important as American independence.

Explanation:

sorry if its wrong

Answer:women's rights are just as important as American independence.

Explanation:

brainliest

what did grandmother devise for every christmas an every birthday the boy in the striped pajamas

Answers

Answer:

she would make up a play with costumes so that Gretel, Bruno, and her could do a play

Which of the following new technologies helped the U.S. defeat German U-boats?
A.sonar and radar
B.jet-fueled boats
C.tanks
D.metal airplanes​

Answers

c should be the correct answer

Put yourself in the place of President Wilson and Americans as World War I ended. A horrible war was coming to an end, and America and its allies were about to find victory. In your opinion, which of these issues would be a concern for Americans as World War I drew to a close? Check all of the boxes that apply. avoiding future overseas wars maintaining the coming peace preventing future world wars keeping America's options open

Answers

Answer:

maintaining the coming peace

preventing future world wars

Explanation:

Supposing I'm President Wilson the United States, or one of the Americans as World War I ended as considering the impending victory of the United States and its allies, I believe the issues that would be a concern for Americans as World War I drew to a close are:

1. maintaining the coming peace

2. preventing future world wars

This is because, despite the potential victory, there are still Americans that lost their lives during the war.

Also, it affected the home front of the Americans in terms of socioeconomic and political issues.

Not only that, the death of humans generally because of war is not good enough for humanity.

Hence, there is a need to maintain peace and prevent future wars.

Answer:

1. avoiding future overseas wars

2. maintaining the coming peace

3. preventing future world wars

4. keeping America’s options open

Explanation: All of them are correct :)

Edge 2021

PLSS HELP ME ASAP!! I WILL GIVE U BRAINLYEST!!!
Junteenth is when Tx finally got word that the war was over and slaves were free. What was the
cause of Tx being so late to find out about these things?

Answers

Answer:

they refused to do it I think

Answer:

well a lot of people in Texas didn't like the blacks. they didn't wants slaves to be free.

Explanation: sorry if this doesn't helps u :( hope it dose :)

20 After the Civil War, southern states adopted Black Codes to
F punish plantation owners for the use of slavery
G support Radical Reconstruction objectives in the South
H limit the impact of the Thirteenth Amendment
promote the activities of the Freedmen's Bureau

Answers

Answer:

h. limit the impact of the thirteenth amendment

Explanation:

i’m taking the test

Answer:

Impact the effect of the thirteenth amendment

Explanation:

" In an effort to regulate the labor force and reassert white supremacy in the postwar South, former Confederate state legislatures soon passed restrictive laws denying blacks legal equality or political rights, and created “black codes” that forced former slaves to sign yearly labor contracts or be arrested and jailed for vagrancy. "

Need Help ASAP quickly please. Do not put links please.

Create a sentence that summarizes the ideologies of communism.

this is for History.

Answers

Answer:

For the ownership of the means of production into the hands of the WORKERS (not the government), and to abolish the commodity form which in simple terms, a true communist society would be a stateless, classless, and moneyless society.

Explanation:

So no, the USSR, China, and other "communist" nations arent communist, they are state-capitalists using actual definitions.

What was the effect of the Selective Service Act?
O
A. It required men from ages 21-30 to register for the military draft.
B.
It encouraged women to take on new jobs to support the war effort.
C. It made it legal for African Americans to fight in racially integrated units.
O
O
D. It granted citizenship to American Indians so they could serve in the army.

Answers

A. It required men from ages 21-30 to register for the military draft.

Explanation:

The Selective Service Act required men from ages of 21-30 to register for the military draft. This act was passed in 1917 and was created to get soldiers for the war effort. This was also the first peacetime draft that the United States has ever had.

As you may know, World War I was happening in 1917. The United States had joined World War I late, just a year before it ended. About a month after the United States had joined the war, the Selective Service Act was passed. This was to ensure that the United States had enough soldiers to fight if needed.

Before World War I happened, the United States did not have a big military compared to other countries. When problems started to arise and the United States finally joined World War I, the military started to expand and even the draft was created.

Which term best describes the relationship between early settlers and American Indians in the Puget Sound region?

cooperative
distant
hostile
unstable

Answers

Answer:

Hostile

Explanation:I got this right on a quiz

A-

cooperative

It's right I finished the quiz

What was a result of farming improvements in ancient China?

pls hurry im timed and i need this

Answers

I will answer but what is the options

need help asap
What is the Korean DMZ?
the peace treaty between North and South Korea
the extreme nationalist party in South Korea
the capital of North Korea
the empty area between North and South Korea

Answers

Answer:

the peace treaty between North and South Korea.

Explanation:

The demilitarized zone (DMZ) is a border barrier that divides the Korean Peninsula roughly in half. It acts as a buffer between SK and NK.

Answer: Sorry if this is a bit late but the answer is D) the empty area between Northa and South Korea

Explanation: The "DMZ" is the Demilitarized Zone between North and South Korea. It serves as an empty buffer zone between two countries still at war.

Somebody tell me about the trex evolution

Answers

Answer:

Fossils reveal the T-rex arose from small dinosaurs. Tyrannosaurus rex began life as a small dinosaur and developed into a giant super predator over the course of 20 million years. Newly uncovered fossils, according to scientists, have a missing link in the evolution of dinosaurs.

Explanation:

Hope this helps!

Please mark me as Brainlineast.

Why was Black History month started by Carter G. Wilson?

Answers

Answer:Woodson developed "Negro History Week". He believed "the achievements of the Negro properly set forth will crown him as a factor in early human progress and a maker of modern civilization."

Explanation:

What new invention was supposed to make it easier to conquer enemy trenches?

tanks

poison gas

machine guns

airplanes

Answers

Answer:

I think the answer is poison gas.

Explanation:

hdhrhehehshe

What the debate for Dred Scott v. Sanford?

Answers

Answer:

Whether Dred Scott a salve was free or not

Explanation:

Dred Scott was a slave in Missouri who moved with his owner in the free territory (Illinois and Wisconsin) before moving back to Missouri. Dred Scott sued for their freedom on the grounds that while they were living in free territory that freed them from slavery.

He took his case through several courts and finally it was decided by the Supreme Court that having lived in a free state did not make him free. It also states as he was someone's property he was not a citizen and could not sue in federal court. He was not a U.S. Citizen.

This was decision was rendered void with the passing of the Thirteenth and Fourteenth Amendments.

Do you agree or disagree with Biden’s views on unions?

Answers

Answer:

yes i do because maybe he could be a big hand into changing the unions to improve usa

Explanation:

guys, please help me its just ur opinion.

Do you believe in the motto "government is best that governs least"? Why or why not?

Answers

No because people need to be under control at certain aspects

how did Israel and Palestinian resolve conflict
*keep simple*​

Answers

Simple naaa Moreover, the UN has “repeatedly stated that Jerusalem remains a final status issue”, he continued, “the city’s future can only be resolved on the basis of international law and through negotiations between the parties”.

Unilateral proposal

Last week United States President Donald Trump proposed his ‘Vision for Peace, Prosperity and a Brighter Future’ that would legalize Israeli settlements in the West Bank and East Jerusalem and also allow Israel to annex around 30 per cent of the West Bank.

Michael Link, UN Special Rapporteur on the situation of human rights in Palestine, referred to it as “a one and a half State solution".

For his part, the Secretary-General responded by recalling the UN’s longstanding commitment to realize a two-State solution, with Israelis and Palestinians “living side by side in peace and security within recognized borders, on the basis of the pre-1967 lines.”

“The position of the United Nations on the two-State solution has been defined, throughout the years, by relevant Security Council and General Assembly resolutions by which the Secretariat is bound”, he upheld.

Human sufferingSuffering continues

Meanwhile, human suffering prevails throughout the occupied Palestinian territory, said the UN chief, including the “dire socio-economic conditions” facing the two million Palestinians living in the Gaza Strip.

“Projects implemented by UN agencies and other donors are bringing a measure of relief, but far more needs to be done”, explained the UN chief.

Ultimately, Gaza also requires political solutions: “On its own, no amount of humanitarian or economic support will resolve either the situation in Gaza or the broader conflict”, he said.

Restrictions must be eased on the movement of goods and people to and from Gaza, with the goal of ultimately lifting them.

“I call on Palestinian leaders to engage constructively with Egypt and others to advance intra-Palestinian reconciliation”, Mr. Guterres stated, repeating his pleas to Member States to “ensure reliable funding for UNRWA [UN Relief and Works Agency for Palestine Refugees in the Near East] to fully continue its vital work on behalf of Palestinian refugees”.

On its own, no amount of humanitarian or economic support will resolve either the situation in Gaza or the broader conflict -- UN chief
Elections ‘long overdue’

Holding “long overdue general elections” in Palestine, including East Jerusalem, will be “a crucial step” towards renewed legitimacy for national institutions and “reuniting the Palestinian people under a single, legitimate and democratic Palestinian national government”, according to the UN chief.

“As my Special Coordinator of the Middle East Process recently said to the Security Council, we are hopeful that the Palestinian President will very soon issue the decree scheduling legislative and presidential elections and that Israel will allow voting in East Jerusalem as well”, he said.

UN’s diamond anniversary

In marking the Organization’s 75th anniversary, Mr. Guterres flagged, “we need a renewed commitment to uphold the values of the Charter as our shared framework of cooperation for realization of the rights of future generations of Israeli and Palestinians”.

“Rest assured of my full commitment and that of the United Nations” for a “just and comprehensive peace” between Palestinians and Israelis “living side by side” as two States, concluded the Secretary-General

Which group had better educational opportunities and therefore were better educated?
A) Ottoman Turks
B) Armenians
C) Neither, they had equal opportunity

Answers

A ottoman Turks I think

The 16th ammendment (graduated income tax) and 17th ammendment (direct election of senators) were originally ideas of what 1890s successful 3rd party who never won a presidential election

Answers

Answer:

Populist party

Explanation:

The 16th amendment (graduated income tax) and 17th amendment (direct election of senators) were originally ideas of POPULIST PARTY (an 1890s successful 3rd party who never won a presidential election)

This is evident in the fact that though the Populist Party never won a Presidential election, they were more successful in influencing the political landscape of the United States during their existence.

Some other legacies of the Populist Party are:

1. expansion of currency and credit structure

2. Railroad legislation

3. Postal saving banks

4. Subtreasury plan.

what supreme court decision was overturned in Brown v. Board of education of topeka?

a. Dred Scott v. stanford
b. Hazel wood v. Kuhlmeier
c. Plessy v. Ferguson
d. Tinker v. Des Moines

Answers

Answer:

c. Plessy v. Ferguson

Explanation:

Board of Education of Topeka on May 17, 1954 is perhaps the most famous of all Supreme Court cases, as it started the process ending segregation. It overturned the equally far-reaching decision of Plessy v. Ferguson in 1896.

What does "musikwissenchaft” translate to? *
•Musictonomy
•Musicology
•Musicwannabe
•Musicoctology

PLEASE HURRY

Answers

Answer:

Musicology.

Explanation:

Who is depicted in the image below?

Answers

Answer:

freud

Explanation:

Sigmund Freud is depicted in the image.

Who is Freud and why is he famous?

Sigmund Freud was an Austrian neurologist who's perhaps most called as the founding father of psychoanalysis. Freud developed a set of therapeutic techniques centered on talk remedy that involved the usage of techniques consisting of transference, free association, and dream interpretation.

Conclusion: Freud's personality principle (1923) saw the psyche structured into three parts (i.e., tripartite), the identification, ego, and superego, all developing at different stages in our lives. These are systems, not parts of the brain, or in any way physical.

learn more about psychoanlysis here https://brainly.com/question/7203736

#SPJ2

Name some of the economic troubles of France.

Answers

Answer:

High Unemployment. The unemployment rate in France, though improving in recent quarters, remains stubbornly high. ...

Lagging Competitiveness. ...

Sluggish Growth.

Explanation:

Answer:

France's main economic challenges in 2019 are to tackle its high rate of unemployment, increase competitiveness, and combat sluggish growth.

High Unemployment. The unemployment rate in France, though improving in recent quarters, remains stubbornly high. ...

Lagging Competitiveness. ...

Sluggish Growth.

7. which was the city-states where fighting and warfare was taught to the people.
help me please this is due today

Answers

Athens and Sparta :)))

The scientific theories developed by Copernicus, Galileo, and Newton resulted in
renewed commitment to the teachings of the Catholic Church
B
support for the Earth-centered theory of the universe.
challenges to the traditional teachings of the Catholic Church,
an increased awareness of the writings of Martin Luther

Answers

The correct answer is B
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