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
Sidana [21]
3 years ago
15

Help it’s for today, not accepting links

Chemistry
1 answer:
Kamila [148]3 years ago
7 0

Answer:

Percent composition  by mulecules is:  (mass of element/molecular mass) x 100

Percent composition by atoms is: (mass of element/molecular mass) x 100.

Explanation:

So their the same

You might be interested in
Describe the difference between red light and blue light. Describe the difference between red light and blue light. 700 nm corre
fiasKO [112]

Answer:700 nm corresponded to light in the red range and 450 nm corresponded to light in the blue range.

Explanation:The wavelengths of the visible spectrum are usually between 400 nm and 700 nmn with the the rays of red light having a longer wavelength, and blue light rays having shorter wavelengths. The red light has a low frequency of about 405–480 THz and , blue light has a higher frequency in the range of 620–680 THz.  This is due to the inverse relationship between wavelength and frequency which also occurs betwwn  wavelength and energy of light rays with the  red light having less photon energy of about  1.65–2.00 eV and the  blue light with high energy photons of about 2.64–2.75 eV.

Red light can be employed in the photosynthesis in plants as it helps in formation of flowers and the production of fruits. Blue light also is important in the production of chlorophyll and can cause a healthy and strong stem and leaves in excess exposure.

6 0
3 years ago
HELP QUICK ILL MARK BRAINLIEST
lbvjy [14]

Answer:

D) The water will freeze into cubes again.

Explanation:

When the ice cubes is left on a counter, it will melt as the forces that make its molecules stick together is broken.

If that tray is put back in the freezer again, the water will freeze into cubes again.

When water freezes, the molecules slow down and settle into its place, arranging in a regular shape that can be appeared as crystals (ice cubes).

3 0
4 years ago
Read 2 more answers
A mixture of CO2 and Kr weighs 35.0 g and exerts a pressure of 0.708 atm in its container. Since Kr is expensive, you wish to re
ollegr [7]

Explanation:

Since, it is given that carbon dioxide is completely removed by absorption with NaOH. And, pressure inside the container is 0.250 atm.

For Kr = 0.250 atm and pressure CO_{2} will be calculated as follows.

           CO_{2} = (0.708 - 0.250) atm

                       = 0.458 atm

Now, we will calculate the mole fraction as follows.

            CO_{2} = \frac{0.458}{0.708}

                       = 0.646

               Kr = \frac{0.250}{0.708}

                    = 0.353

Now, we will convert into gram fraction as follows.

              CO_{2} = 0.646 \times 44

                          = 28.424

                   Kr = 0.353 \times 83.78

                        = 29.57

Therefore, total mass is calculated as follows.

           Total mass = (28.424 + 29.57)

                              = 57.994

Hence, the percentage of CO_{2} and Kr are calculated as follows.

          CO_{2} = \frac{28.424}{57.99} \times 100

                     = 49%

               Kr = \frac{29.57}{57.99} \times 100

                    = 51%

Hence, amount of CO_{2} and Kr present i mixture is as follows.  

         CO_{2} in mixture = 35 \times 0.49

                             = 17.15 g

                  Kr = 35 \times 0.51

                       = 17.85 g

Thus, we can conclude that 17.15 g of CO_{2} is originally present and 17.85 g of Kr is recovered.

6 0
3 years ago
The scores obtained by a group of boys in a test are 1,3,0,7,8,3,9,9,9,3
Crazy boy [7]
Mean=5.3
Median=5
Mode=3 and 9
4 0
3 years ago
Line p has an equation of y= – 8x+6. Line q, which is perpendicular to line p, includes the point (2, – 2). What is the equation
Simora [160]

The equation of line q is determined as y =  ¹/₈x - ⁹/₄.

<h3>What is slope?</h3>

The slope of a line is the change in y axis to change in x axis.

<h3>Slope of line P</h3>

y = – 8x + 6

from general line equation, y = mx + c

where;

  • m is slope

m = - 8

<h3>Slope of line q</h3>

m₂ = -1/m

m₂ = -1/-8

m₂ = 1/8

<h3>Equation of line q</h3>

(y - y₁) / (x - x₁) = m₂

(y + 2)/(x - 2) = 1/8

y + 2 = ¹/₈(x - 2)

y + 2 = ¹/₈x -  ¹/₄

y = ¹/₈x - ⁹/₄

Thus, the equation of line q is determined as y =  ¹/₈x - ⁹/₄.

Learn more about equation of line here: brainly.com/question/13763238

#SPJ1

3 0
2 years ago
Other questions:
  • A rock has the density of 8g/ml. If the rocks mass is 2g what is the rocks volume ?
    9·2 answers
  • (As) in noble-has notion
    6·1 answer
  • Sodium forms an ion with a charge of_<br> a. 1+<br> b. 1-<br> c. 2+<br> d.0
    10·1 answer
  • In an oxidation–reduction reaction, what happens to the electrons in the oxidation process? Electrons are bonded. Electrons are
    14·1 answer
  • Electrons are held in an atom by attraction to what particle or location?
    7·1 answer
  • Calcium Chloride can be represented by the chemical formula of?
    10·2 answers
  • What happens to the atomic radius when an electron is gained?
    8·1 answer
  • Which of the following statements is/are CORRECT? 1. A solution is a homogeneous mixture of two or more substances. 2. A solute
    6·1 answer
  • How many kilograms of oxygen did Samantha need to utilize to react with 36.29 kg of triglycerides (C55H104O6)?
    9·1 answer
  • How much energy was lost in the total process illustrated? Please Help
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!