Chemistry Middle School

Which of the following occurs when there is a chemical reaction? (Mark all that apply.)
a. the reactants don't change
b. bonds between atoms break
c. atoms rearrange
d. new bonds form
e. new substances form
f. there is no product

Answers

Answer 1
The atoms one is right I did this last year

Related Questions

If you start with 5.5 liters of hydrogen peroxide (H2O2), how many molecules of oxygen gas (O2) will be produced?

Answers

Answer:

2.75 mol O2

Explanation:

2 H2O2 = 2 H2O + O2 is the formula

heres a picture of the work

Ans is 2 oxygen atoms

PLEASE HELP!!!!!!!! giving brainlist

Answers

Answer:

I can only give the answer for the first page.

Explanation:

1. Thermal energy always moves from hot objects to cold objects.

2. When two states of matter reach the same temperature, it is called thermal equilibrium.

hot to cold thermal radiation

A disease caused by the inflammation of mucus membranes inside the bronchial tubes. There are more than 3 million U.S. cases a year.

Answers

Inflammation can have causes that aren't due to underlying disease. Examples include injuries such as sprains and strains, overuse, or insect bites.

Does an acidic solution contain hydroxide ions? Explain your answer.

Answers

Answer:

Yes but there are more hydrogen ions than hydroxide ions.

An acidic solution contains a large concentration of hydronium ions than hydroxide ions. Yes, an acidic solution contains hydroxide ions.

What are hydroxide ions?

Hydroxide ions are produced from the ionization of water molecules carrying the positive charge on hydrogen.

A solution contains both the hydroxide OH⁻ and hydronium ions H⁺.

In order to make a solution acidic, a solution must contain more hydronium ions compared to hydroxide ions.

Yes, an acidic solution contains hydroxide ions.

Learn more about hydroxide ions.

https://brainly.com/question/25883474

#SPJ2

( 15 points to whoever replies quickest no links pls ) a farmer has used a fertiliser containing ammonium nitrate, potassium nitrate and ammonium sulphate on his fields but some may have leached into a nearby river. If a sample of river water was tested, what colour would the flame be if there was fertiliser contamination

Answers

If water of the river was tested there would be orange color flame.

What is fertilizer?

Millions of tons of air, natural gas, and mined ores are transformed into plant nutrition products based on the three crucial nutrients nitrogen, phosphorus, and potassium by the fertilizer industry.

The process begins by combining nitrogen from the air with hydrogen from natural gas at high temperature and pressure to produce ammonia, which is then used to make nitrogen-based fertilizers, the largest product category. Natural gas is used as a raw material for about 60% of the time, while the remaining 40% is used to power the synthesis process.

The nitric acid created from the ammonia is combined with it to create nitrate fertilizers like ammonium nitrate (AN). Urea can also be made by combining ammonia with liquid carbon dioxide. To create UAN (urea ammonium nitrate) solution, both of these products can be combined with water.

Therefore, If water of the river was tested there would be orange color flame.

To learn more about fertilizers, refer to the link:

https://brainly.com/question/3204813

#SPJ2

What type of worm has a circulatory system?
Nematodes
Segmented worms
Roundworms
Flatworms

Answers

Your answer will be Segmented worms. Segmented worms have a closed circulatory system in which blood is enclosed in blood vessels.

If Enough Thermal energy And change of state, write each sentence.
Write (solid), (liquid), or (gas) to complete each sentence
If enough Thermal energy is added to a liquid, it will change to a

___________

Please explain in simple terms.
Spam = remove
Googling it = Remove

Answers

Answer:

If enough thermal energy is added to a liquid lets say cold it will freeze turning it into a solid. they same for a solid if enough thermal energy is added it can turn to a liquid or a gas.

Explanation: Its science.

Answer:

gas

Explanation:

I don't know, just it is gas bc the atoms gain space and move freely and yeah

some students observe four different lab investigations. The students record their observations in a table.
Investigation
Observations
1
A beaker of water is
heated on a hot plate. Bubbles form in
the water, and steam is given off.
2
Oil is added to a beaker of water. Oil forms a layer on top
of the water
3
Sand and iron filings are mixed in a beaker. A magnet is
then used to separate the iron filings from the sand.
4
A piece of chalk is placed in a beaker of vinegar Bubbles
form as a gas is given off.
Which investigation most likely involved a chemical reaction?

Answers

Answer:

Number 4 is an example of a chemical reaction

Explanation:

heThe chalk is reacting with the vingear which is creating a new substance. The new substance is the gas that the reaction gives off.

I think the number 4 is the right answer
Other Questions
A cone in the diagram below has a radius (r) of 10mm and its height (h) is 24mm calculate the length of the slant height 28.Car A and car B are 120 km apart. If they move towards each other, they will meet in 1 hour. If theymove in the same direction, car A will catch up with car B in 5 hours. Find the speed of car A andthe speed of car B. (Assume that the speeds of the cars are constant.) will give branliest write 5(7j + 6 + 3j) into a verbal expression Who are the greek gods? If The Wall Street Journal lists a stock's dividend as $1, then it is most likely the case that the stock: Multiple Choice pays $1 per share per quarter. paid $.25 per share per quarter for the past year. paid $1 during the past quarter, with no future dividends forecast. is expected to pay a dividend of $1 per share at the end of next year. 1. 2x - 8 when x = 32. 45 - (4 . y) when y = 53. 32 + 2g -7 when g = 4 The ratio of body fat to lean body tissue, such as bone, muscle, and fluid Please help, Ill mark you as brainliest!!!!! Testbank Multiple Choice Question 81 At the beginning of 2020, Sunland Company issued 8% bonds with a face value of $5700000. These bonds mature in the five years, and interest is paid semiannually on June 30 and December 31. The bonds were sold for $5259870 to yield 10%. Sunland uses a calendar-year reporting period. Using the effective-interest method of amortization, what amount of interest expense should be reported for 2020 Which of the following is NOT a big difference between command and market economies? A. Opportunities for private citizens to own property B. Government control of business C. Opportunities for citizens to start their own business D. A system for exchanging currency in trade 1) Gary makes $15.00 per hour for a five-dayforty-hour work week. Also, he makes double-time for holidays. This week, he works threeregular days and two holidays. What will be hispaycheck for this week?A) $$40B) $850C) $860D) $870E) $880 Mr. Bucci goes to the grocery store and purchases17 bags of raisins and a $2.97 jar of peanut butter.His total cost was $34.76. What was the cost for abag of raisins?Help How many fluorine atoms are there in 39.4 moles of CF4? image down below if it is correct i will give brainliest look at this photograph. This is an example of: the measures of the angles of a triangle are shown in the figure below. solve for x Margery is 3 years younger than 2 times Abbys age. Margery is 33 years old. How old is Abby? A. 11B. 13C. 15D. 18 How does the setting of the drive-in movie theater in chapter 2 of The Outsiders, as well as the characters of Cherry and Marcia, help develop the character of Ponyboy When wax is heated, it turns into a liquid. How are the wax molecules affected by this change of state? 25+2(3 x 4) - 7=???Show ur works please