a) To determine the facilities that contribute the most to recycling check the pie chart and select the facility with the largest portion while to determine the facilities that contribute the least to recycling check the pie chart and select the facility with the smallest portion

b) Energy is saved because the products which are recycled usually require less energy to turn them into usable materials

c) It saves energy through recycling. It helps sustains the environment. It decrease the emission of green house gases

Explanation:

The question is not complete

a) Pie chart is the graphical representation of information in which the information is represented in a circle. The circle is divided into segments and the portion with the largest segment has the highest percentage.

To determine the facilities that contribute the most to recycling check the pie chart and select the facility with the largest portion while to determine the facilities that contribute the least to recycling check the pie chart and select the facility with the smallest portion

b) Extraction and processing of raw resources to make end products requires a lot of energy. With recycling energy is saved because the products which are recycled usually require less energy to turn them into usable materials

c) It saves energy through recycling. It helps sustains the environment. It decrease the emission of green house gases.

6 0

3 years ago

A student plans to use a density versus solution concentration standard curve to identify the sodium chloride concentration in a

Art [367]

Answer:

a. 0.50 g, 1.0 g, 1.5 g, 2.0 g, 2.5 g;

g. 0.1 g, 0.5 g, 1.0 g, 1.5 g, 2.0 g

Explanation:

The percent mass is defined as a ratio between the mass of a solute and mass of a solution:

$\omega = \frac{m_{solute}}{m_{solution}}\cdot 100\%$

Since solution only consists of a solute and solvent, express its mass as:

$m_{solution} = m_{solute} + m_{solvent}$

Then:

$\omega = \frac{m_{solute}}{m_{solution}}\cdot 100\%=\frac{m_{solute}}{m_{solute} + m_{solvent}}$

Firstly, solve for how much mass is required to prepare 3.0 %. Let's say, we have x g of the solute:

$0.03 = \frac{x}{30.0 + x}\therefore x = 0.03(30.0 + x)$

$x = 0.90 + 0.03x$

$0.97x = 0.90\therefore x = 0.93 g$

Similarly, solve for 6.0 %, let's say, we have x g of the solute again:

$0.06 = \frac{x}{30.0 + x}\therefore x = 0.06(30.0 + x)$

$x = 1.80 + 0.06x$

$0.94x = 1.80\therefore x = 1.91 g$

Hence, masses should be in a range of 0.93 g to 1.91 g.

7 0

3 years ago

Sound is an example of<br><br> kinetic energy<br> potential energy

motikmotik

Answer-kinetic energy. The human experience of sound is caused by vibrations. The object creating the sound creates waves of movement through a medium, like air, until it reaches our eardrums, which then vibrate and our brain interprets that as sound. Here are some examples of sound energy:

7 0

2 years ago

Read 2 more answers

Tooth enamel is ca5(po4)3(oh). calculate the percent composition of the elements present.

Mama L [17]

We shall find the molar mass first.
Ca5(PO4)3(OH) = (40 * 5) + 3 (31 + 4(16)) + 16 + 1 = 200 + 285 + 17 = 485 + 17 = 502.
Percent of Calcium = 200/ 502 * 100 = 39.8%
Percent of Phosphorus = 91/502 * 100 = 18.1%
Percent of Hydrogen = 1/502 * 100 = 0.19%
Percent of Oxygen = 100 - (39.8 + 18.1 + 0.19) = 41.91%

8 0

3 years ago

Read 2 more answers