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
n200080 [17]
3 years ago
7

Need help fast please I am timed and giving 47 points.

Chemistry
2 answers:
Leokris [45]3 years ago
6 0

Answer:

C

Explanation:

antiseptic1488 [7]3 years ago
3 0

Answer:

C - 3

Explanation:

This can be actually tested

You might be interested in
What term is used to define when a substance reacts quickly with oxygen to produce light and heat?
sergejj [24]

Answer:

I think it's a

Explanation:

not sure hssjkskaakakskksskksqoqkakskzksjsj

7 0
3 years ago
Read 2 more answers
Determine the molar mass of a 0.458-gram sample of gas having a volume of 1.20 l at 287 k and 0.980 atm. group of answer choices
lilavasa [31]

Considering the ideal gas law and the definition of molar mass, the molar mass of the sample of gas is 9.17 \frac{g}{mol}.

<h3>Ideal gas law</h3>

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

  • P is the gas pressure.
  • V is the volume that occupies.
  • T is its temperature.
  • R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.
  • n is the number of moles of the gas.

<h3>Definition of molar mass</h3>

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

<h3>Molar mass of the sample of gas</h3>

In this case you know:

  • P= 0.980 arm
  • V= 1.20 L
  • T= 287 K
  • R= 0.082 \frac{atmL}{molK}
  • n= ?

Replacing in the ideal gas law:

0.980 atm× 1.20 L= n× 0.082\frac{atmL}{molK}× 287 K

Solving:

(0.980 atm× 1.20 L)÷ (0.082\frac{atmL}{molK}× 287 K)= n

<u><em>0.04997 moles= n</em></u>

On the other hand, you know that the<u><em> mass of the sample of gas</em></u> is <u><em>0.458 grams</em></u>. Replacing in the definition of molar mass:

molar mass=\frac{0.458 grams}{0.04997 moles}

Solving:

<u><em>molar mass= 9.17 </em></u>\frac{g}{mol}

Finally, the molar mass of the sample of gas is 9.17 \frac{g}{mol}.

Learn more about

molar mass:

brainly.com/question/5216907

brainly.com/question/11209783

brainly.com/question/7132033

brainly.com/question/17249726

ideal gas law:

brainly.com/question/4147359

#SPJ1

6 0
2 years ago
Does anyone know the answer?????​
Juli2301 [7.4K]

Answer:

In chemistry, pH (/piːˈeɪtʃ/) (abbr. power of hydrogen or potential for hydrogen) is a scale used to specify how acidic or basic a water-based solution is. Acidic solutions have a lower pH, while basic solutions have a higher pH.

Explanation:

that should answer ur question

3 0
3 years ago
Help help help pls pls pls​
Arlecino [84]

Explanation:

Aluminium and Chlorine.

Al and Cl2.

4 0
3 years ago
How does water's dissolving power support life on Earth?
kozerog [31]
The dissolving power of water is very important for life on Earth. Wherever water goes, it carries dissolved chemicals, minerals, and nutrients that are used to support living things. Because of their polarity, water molecules are strongly attracted to one another, which gives water a high surface tension
6 0
3 years ago
Other questions:
  • Fluorine (F) has seven electrons in its outermost shell. Fluorine _____.
    9·2 answers
  • Why there is not reaction in nac2h3o2(aq)+pb(no3)2(aq)→?
    5·1 answer
  • Explain why two thin sweaters feel warmer then one thick sweater​
    10·1 answer
  • Form the complementary solution to the homogeneous equation. yc(t) = Cl [ ] +C2 Construct the (simplest) particular olution of t
    10·1 answer
  • QUICK PLEASE HELP ONLY 2 MINUTES A group of engineers has a problem. Solving this problem requires the engineers to generate man
    6·1 answer
  • 2) __H,PO, +
    9·1 answer
  • Need Help Pls ! Homework Sheet
    12·1 answer
  • Understanding the theory of plate tectonics can help people better understand Earth's movements. How can knowledge of plate tect
    8·1 answer
  • Which describes the molecule below?
    10·1 answer
  • The first chemical equation was designed by
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!