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
antiseptic1488 [7]
3 years ago
7

I’m not sure quite sure about this one please help

Chemistry
1 answer:
ehidna [41]3 years ago
3 0
This one is correct
You might be interested in
One mole of which of these compounds contains two moles of hydrogen atoms? f NaOH g H2S h CH4 j NH3
Bas_tet [7]
G. H2S contains two hydrogen atoms
4 0
3 years ago
he combustion of propane (C3H8) is given by the balanced chemical equation C_3H_8+5O_2\longrightarrow3CO_2+4H_2O C 3 H 8 + 5 O 2
Basile [38]

Answer:

290 grams

Explanation:

Let's begin by writing the balanced chemical equations:

C_{3}H_{8} +5O_{2} --->3CO_{2} +4H_{2}O

Then we calculate the number of moles in 97g of propane.

n(propane)=\frac{mass}{molarmass} =\frac{97g}{44.1g/mol}=2.1995mol

According to the balanced chemical equation, one mole of propane produces 3 moles of carbon dioxide. So the available number of moles of propane must be multiplied by three to work out the number of carbon dioxide produced.

n(carbon dioxide)= 2.1995mol*3 = 6.5985mol

mass(carbon dioxide) = moles * molar mass

                                   = 6.5985 mol * 44.01 g/mol

                                   = 290 grams

4 0
3 years ago
45 Three samples of the same solution are tested, each with a different indicator. All three indicators, bromthymol blue, bromcr
ANEK [815]

<u>Answer:</u> The correct answer is Option 4.

<u>Explanation:</u>

Bromothymol blue, Bromocresol green and Thymol blue are the indicators which change their color according to the change in pH of the solution.

The pH range and color change of these indicators are:

  1. Bromothymol Blue: The pH range for this indicator is 6.0 to 7.5 and color change is from yellow to blue. It appears yellow below pH 6.0 and blue above pH 7.5
  2. Bromocresol green: The pH range for this indicator is 3.5 to 6.0 and color change is from yellow to blue. It appears yellow below pH 3.5 and blue above pH 6.0
  3. Thymol Blue: The pH range for this indicator is 8.0 to 9.6 and color change is from yellow to blue. It appears yellow below pH 8.0 and blue above pH 9.6

As, the highest pH of all the indicators is 9.6, so every indicator will appear blue above pH 9.6.

Hence, the correct answer is Option 4.

3 0
3 years ago
Read 2 more answers
When substances go through chemical changes, which of the following will always happen? A. Exactly one new substance will form a
tiny-mole [99]
I think b is the answer 
4 0
3 years ago
Read 2 more answers
the area that stretches from the highest high-tide line on land out to he point of the continental shelf exposed by he lowest lo
allsm [11]
Is called the Intertidal zone

4 0
3 years ago
Other questions:
  • 360 grams of glucose, C6H12O6, is dissolved in 10 liters of solution. Determine the molarity (M)
    11·1 answer
  • Liquid nitrogen has a density of 0.808 g/mL and boils at 77 K. Researchers often purchase liquid nitrogen in insulated 185 L tan
    9·1 answer
  • The combustion of 0.0222g of isooctane vapor, C8H18(g), at constant pressure raises the temperature of a calorimeter 0.400 degre
    5·1 answer
  • What is the energy change per gram of ice when an iceberg composed of pure water, cp = 2.06 j/(gk, is heated from -25°c to -15°c
    13·1 answer
  • The energy in gasoline is called
    7·2 answers
  • The table shows the average distance between the molecules of a substance in the solid, liquid, and gaseous states.
    10·1 answer
  • For fun<br><br> need full details to win<br> would you rather be a man or a women and why
    5·2 answers
  • Someone plssss help meeee !!!! How much energy is required to vaporize 112 g of water? ???
    15·1 answer
  • 9 Some people say that something that does not
    7·1 answer
  • Step 4: Summarize nuclear changes.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!