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
larisa [96]
3 years ago
13

Using the black numbers on the stopwatch to answer the questions.

Chemistry
2 answers:
Andrew [12]3 years ago
8 0

Answer:  The answer to the top one is 5.3 s and the bottom one is tenths of seconds

Explanation: Hope this helps plz mark!! Thx

Rus_ich [418]3 years ago
4 0

Answer: the top one is 5.3 s and the bottom one is tenths of seconds

Explanation:

You might be interested in
What term refers to the small parts of a cell that carry out different functions?
deff fn [24]
That would be C. Organelles
4 0
3 years ago
Match the items to use the analogy of time to the vocabulary of chemistry.
antoniya [11.8K]

Answer:

1 year- 1 mole

time in general- amount of matter

1 second- 1 atom/ particle

6 0
2 years ago
Read 2 more answers
So42? draw the molecule by placing atoms on the grid and connecting them with bonds. include all lone pairs of electrons. show t
vivado [14]
A molecular structure is a shape of a molecule, a three-dimensional shape or configuration of a molecule that is dependent on the preferred spatial orientation of covalent bonds to atoms having two or more partners. Attached is the diagram for the molecular structure of So42
. 

3 0
3 years ago
Propane (C3H8) can be burned to produce heat for homes. The products of the reaction are CO2 and H2O. For complete combustion to
Natalija [7]

Answer:

1- 3 Moles of CO2  

2- 132 g of CO2  

3- 105,6 g of CO2

4- Limiting Reagent O2

<u>Products form based on limiting reagent (384g O2) :</u>

CO2: 316,8 g

H2O: 172,8 g

<u>Products form based on C3H8 (132,33 g):</u>

CO2: 396,99 g

H2O: 216,54 g  

Explanation:

<u>Atomic Masses:</u>

C: 12

H: 1

O: 16

<u>Molecular weights:</u>

C3H8: 44 g

O2: 32 g

H2O: 18 g

CO2: 44 g

C3H8 + 5 O2⇒ 3 CO2 + 4 H2O

C3H8 (44g)+ O2 (160 g) ⇒ CO2 (132 g) + H2O (72 g)

In 5 moles of O2 are produced 3 moles of CO2, equivalent to 132 g

For 160g of O2 are produced 132 g of CO2, so 128 g of O2

160 g  O2 ⇒ 132 g CO2

128 g  O2⇒ × = 105,6 g CO2

(128×132÷160= 105,6)

The limiting reagent is the substance that is totally consumed when the chemical reaction is complete. The amount of product formed is limited by this reagent, because the reaction cannot continue without it.

If I have 132,33 g of C3H8 and 384 g O2 we can calculate:

For          44 g of CH3H8  ⇒160 g of O2

With   132,33 g of CH3H8 ⇒ ×= 481,2 g of O2

(132,33×160÷44=481,2)

As this amount exceeds the quantity of O2 that we have, we can assume that the 384 g O2 will be totally consumed.

<u>Calculations of the products formed in base of quantity of O2 (limiting reagent):</u>

160 g  O2 ⇒ 132 g CO2

384 g  O2⇒ × = 316,8 g CO2

(384×132÷160= 316,8)

160 g  O2 ⇒ 72 g H2O

384 g  O2⇒ × = 172,8 g H2O

(384×72÷160= 172,8)

<u>Calculations of the products formed in base of quantity of C3H8 (excess reagent):</u>

     44 g  C3H8 ⇒ 132 g CO2

132,33 g  C3H8 ⇒ × = 396,99 g CO2

(132,33×132÷44=396,99)

     44 g C3H8 ⇒ 72 g H2O

132,33 g  C3H8⇒ × = 216,54 g H2O

(132,33×72÷44= 216,54)

<u />

3 0
3 years ago
What is the volume, in liters, occupied by 0.485 moles of Oxygen gas at 23.0 oC and 0.980 atm?
____ [38]
Use the universal gas formula

PV=nRT
where
P=pressure ( 0.980 atm)
V=volume (L)
T=temperature ( 23 ° C = 23+273.15 = 296.15 ° K)
n=number of moles of ideal gas (0.485 mol)
R=universal gas constant = 0.08205 L atm / (mol·K)

Substitute values,
Volume, V (in litres)
=nRT/P
=0.485*0.08205*296.15/0.980
= 12.0256 L
= 12.0 L (to three significant figures)


Read more on Brainly.com - brainly.com/question/10606064#readmore
5 0
3 years ago
Other questions:
  • Classify the reaction: N2 (g) + 3H2 (g) à 2NH3 (g)
    15·1 answer
  • What are three elements that have a higher boiling point than water
    11·1 answer
  • Select all the discoveries for which ernest rutherford is credited. the emissions of radioactive elements the neutron the electr
    13·1 answer
  • What happens when you mix baking powder baking soda and hydrogen peroxide together?
    13·1 answer
  • 58.0 g of K2SO4 was dissolved in 500 g of water. What is the molality of this solution?
    10·1 answer
  • Similarities and differences between covalent bonds and molecular interactions
    12·1 answer
  • (IMAGE ATTACHED)<br>I dont know what this is asking me, anyone know how to do this?​
    11·1 answer
  • Label the parts of the wave
    14·1 answer
  • Suppose that a 10-mL sample of a solution is to be tested for I− ion by addition of 1 drop (0.2 mL) of 0.13 M Pb(NO3)2.
    9·1 answer
  • When you exercise strenuously, your body produces excess heat. Describe what your body does to help prevent your temperature fro
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!