1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
muminat
3 years ago
10

As part of an investigation, students combined substances in a beaker to observe chemical reactions. They performed two procedur

es. They measured the mass of each substance before and after each reaction. The table shows their observations. Assuming the students did not make any careless errors, what likely explains these changes in mass?
Question 3 options:

Procedure 1: All the reactants were liquids that evaporated. Procedure 2: A gas was formed as one product, and it escaped into the air.

Procedure 1: One of the reactants was converted to thermal energy. Procedure 2: All the products were liquids.

Procedure 1: The reactants were liquids with different densities. Procedure 2: The reactants were combined into only one product.

Procedure 1: One of the products was a gas that escaped into the air. Procedure 2: A gas from the air reacted with one of the other reactants.
Chemistry
2 answers:
lara31 [8.8K]3 years ago
6 0
The 2 one i think so if not the last one
Alekssandra [29.7K]3 years ago
5 0

Answer:

D

Explanation:

You might be interested in
Lab: Limiting Reactant and Percent Yield
creativ13 [48]

Answer : If a substance is the limiting reactant, then it limits the formation of products because in the reaction it is present in limited amount.

Explanation :

While observing a chemical reaction, we can tell about whether a reactant is limiting or excess.

Step 1 : first write the chemical reaction and then balanced the chemical equation.

C_2H_4+H_2\rightarrow C_2H_6

Step 2 : convert the given masses into the moles if mass of C_2H_4 is 10.5 g and molar mass of C_2H_4 is 28 g/mole and the mass of hydrogen is 0.40 g and molar mass of hydrogen is 2 g/mole.

\text{moles of }C_{2}H_{4}=\frac{10.5g}{28g/mole}=0.375moles

\text{moles of }H_{2}=\frac{0.40g}{2g/mole}=0.20moles

Step 3 : Now we have to determine the limiting reagent and excess reagent.

\text{ moles of }C_{2}H_{4}\text{ in excess}=0.375-0.20=0.175\text{moles}

Now we conclude that C_{2}H_{4} is the limiting reagent and hydrogen is an excess reagent.

Hypothesis :

Limiting reagent : It is the reagent in the chemical reaction that is totally consumed when the chemical reaction is complete.  Limiting reagent limits the formation of products.

7 0
2 years ago
Read 2 more answers
Given the balanced equation, calculate the mass of product that can be prepared from 2.36 g of zinc metal.
Nataly_w [17]
Moles of Zn present= 2.36/65.4= 0.0361 moles
Therefore maximum moles of ZnO= 0.0722
Mass of one mole of ZnO= 81.4
Mass of ZnO produced= 0.0722 x 81.4= 5.87g
6 0
3 years ago
Cuantos moles de CO2 se requieren para reaccionar con 2 moles de Ba (OH)2
EastWind [94]

Answer:

hola soy jess, tu respuesta esta aqui

¿cuantos moles de CO2 se requiere para reaccionar 2 moles de Ba(OH)2

2 mol Ba(OH)₂ × \frac{1molCO_{2} }{1molBa (OH)_{2}}

1molBa(OH)

2

1molCO

2

= 2 moles CO₂

Explanation:

espero que pueda ayudarte

hermana/hermano

lo que

hahahaha

3 0
3 years ago
Cells in different tissues or organs (skin, eye, bone, etc.) contain different DNA. true or fasle,?
Ymorist [56]

Answer:

false

Explanation:

trust

6 0
3 years ago
Read 2 more answers
As student used a pen to draw a line across a piece of chromatography paper. he then placed a sample of dye on the drawn line fo
AleksAgata [21]

Answer is in the photo. I can only upload it to a file hosting service. link below!

tinyurl.com/wpazsebu

3 0
2 years ago
Other questions:
  • What are the most enzymes in the body?
    5·1 answer
  • If the natural abundance of Br−79 is 50.69 %, what is the natural abundance of Br−81?
    9·1 answer
  • Addition of 12 M (concentrated) HCl to saturated NaCl results in precipitation of NaCl. Yet when 1 M HCl is added to the same Na
    14·1 answer
  • What acid and what base would you choose to prepare the salt potassium perchlorate (kclo4)?
    9·2 answers
  • If 2.112g of Fe2O3 reacts with 0.687g of Al, how much pure Fe will be produced?
    9·1 answer
  • 3. A Beer's law plot for Cu2+ was experimentally obtained. The slope of the Beer's law plot was 435 L/mol (with a y-intercept =
    7·1 answer
  • When boiling a pot of water on the stove without a lid on the pot, the _____________. A energy and water molecules are free to e
    13·2 answers
  • PLEASE HELP!
    7·1 answer
  • 1.How many moles of each element are in 0.0250 mol of K 2 Cr O 4?
    10·1 answer
  • What are the components of the system that influence its motion? *
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!