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
pshichka [43]
2 years ago
15

How many moles are in 68.5 liters of oxygen gas at STP?

Chemistry
1 answer:
larisa86 [58]2 years ago
5 0
At STP, 1 mol of gas occupies 22.4 L.
                                     mol O2 = 68.5 L * 1 mol/22.4 = 3.06 mol
The answer is that there are 3.06 mol of oxygen gas at STP.
You might be interested in
How do you use chromatography to separate mixtures
MakcuM [25]

Answer:

by using a moving solvent on filter paper.

Explanation:

3 0
3 years ago
Which of the following elements has the smallest atomic radius
babunello [35]

Answer:

Element with the smallest radius is Carbon.

Explanation:

In a periodic table, atomic radius increases down the group due to addition of a new shell and decreases across the period from left to right due to increasing nuclear charge.

Due to addition of more electrons in same shell and increase of positive charge in nucleus increases attractive forces between electrons and nucleus hence decreasing size.

Carbon and Lithium are present in same period and hence Carbon has smaller size; Potassium and Bromine are present in same period and hence out of the two, Bromine has smaller size.

On comparing Carbon and Bromine, atomic radius increases down the group hence, Carbon has the smallest radius among the four given elements.

3 0
3 years ago
What is an example of a change of state. Help I need this answered asappp pls & tyyy
melamori03 [73]

pretty sure its A

water being boiled in a pot shows a phase change from liquid water to gaseous water when it evaporates

all other choices are just changing its form or shape basically, solid to solid

6 0
3 years ago
Julio measured the weight of a grain of sand and found it to be 3.5 times 10 Superscript negative 10 kg. He also measured the we
Anvisha [2.4K]

The total weight of both objects : 7.035 x 10⁻⁸ kg

<h3>Further explanation</h3>

Given

The weight of a grain of sand : 3.5 x 10⁻¹⁰ kg

The weight of one hair from his eyebrow : 7 x 10⁻⁸ kg

Required

The total weight of both objects

Solution

Scientific Notation consists of 2 parts  

1. the first part: the first digit followed by the decimal point  

2. The second part: the power of 10 (the exponents).which shows the number of digits after the decimal point  

To add/subtract, the exponents must be the same and then add/subtract the coefficient

  • convert the largest exponent  (7 x 10⁻⁸)

7 x 10⁻⁸ = 700 x 10⁻¹⁰

  • add the coefficients  

\tt =(3.5+700)\times 10^{-10}\\\\=703.5\times 10^{-10}\\\\=7.035\times 10^{-8}

 

7 0
2 years ago
For each claim below, select whether you think this claim is supported by evidence or not. Elisa is feeling tired because she ha
MaRussiya [10]

Answer and Explanation:

Elisa is feeling tired because she has diabetes - suported: diabetes, in fact, can trigger episodes of extreme tiredness in patients, this tiredness may have been accompanied by dizziness and being.

Elisa is feeling tired because she has anemia. - Supported: Anemia hampers the transmission of oxygen in the blood, which can cause tiredness, weakness and extreme fatigue.

Elisa is feeling tired because she has an injury to her pancreas - suported: The pancreas is responsible for the production of insulin which is essential to prevent diabetes from establishing itself in the body. If the pancreas is damaged, insulin may be insufficiently produced, increasing the chance of developing diabetes and causing tiredness.

Elisa is feeling tired because she has asthma - suported: asthma causes breathing difficulties, this can cause tiredness and fatigue.

8 0
3 years ago
Other questions:
  • Valence bond theory predicts that bromine will use _____ hybrid orbitals in brf5.
    11·1 answer
  • HELP WORTH 20 points if Awnser is correct
    12·1 answer
  • Lewis Dot structure for N2?<br> PHOTO ABOVE <br><br> Is not D I got it wrong
    7·1 answer
  • What is the total number of moles of oxygen atoms present in 1 mole of mg(c1o3)2
    6·2 answers
  • 3. A scientific investigation typically begins when a scientist makes observations that lead to the formation of a (n) _________
    10·1 answer
  • a sample of salt has 1.74 moles of sodium chloride. how many formula units of the ionic compound are in the sample?
    12·1 answer
  • Choose the formula for hydroxide.<br> OH<br> HPO4<br> Ca(OH)2<br> d Ba(OH)2
    6·2 answers
  • Cho 5,6g sắt tác dụng hết với dung dịch HCL 10%, tính:
    5·1 answer
  • 1 mole of water, 3 moles of methanol and 5 moles of ethanol are mixed together. What is the mole fraction of methanol
    15·1 answer
  • What type of bonds connect the bases to each other.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!