All categories

3 years ago

After studying many factors in the environment, a scientist developed this graph to

Chemistry

1 answer:

antoniya [11.8K]3 years ago

3 0

Answer:

D. to predict the effects of human population on the supply of natural resources

Explanation:

From the available graph, it can be seen that Natural resources and human population are directly proportional to each other. As the human population increases, the natural resources decreases, until they both finally meet up.

Hence, in this case, the correct answer is that the role of science in this study is "to predict the effects of human population on the supply of natural resources."

You might be interested in

The difference between diffusion and osmosis is that osmosis deals only with ________.

Nat2105 [25]

Osmosis deals only with D. Water. Diffusion and Osmosis are relatively the same thing besides the fact that water is largely incorporated with the osmosis.

6 0

3 years ago

A 10.00 g sample of a soluble barium salt is treated with an excess of sodium sulfate to precipitate 11.21 g BaSO4 (M- 233.4). W

aliina [53]

Answer:

The salt is barium chloride.

Explanation:

$BaX_2++Na_2SO_4\rightarrow BaSO_4+2NaX$

Moles of barium sulfate = $\frac{11.21 g}{233.38 g/mol}=0.0480 mol$

According to reaction, 1 mol of barium sulfate is produced from 1 mol of $BaX_2$ .

Then 0.0480 moles will be produced from:

$\frac{1}{1}\times 0.0480 mol=0.0480 mol$ of $BaX_2$ .

Mass of $BaX_2$ used = 10.00 g

Moles of $BaX_2$ =\frac{10.00 g}{\text{Molar mass}}[/tex]

$0.0480 mol=\frac{10.00}{\text{Molar mass}}$

Molar mass of $BaX_2$ = 208.33 g/mol

The nearest answer to our answer is $BaCl_2=208.2 g/mol$ .

The correct answer barium chloride with molar mass of 208.2 g/mol.

8 0

3 years ago

Elements are organized into groups / families according to their physical and chemical properties. Identify the elements that's

Kryger [21]

Answer:

1 valence - Alkali Metals: Li Lithium, Na Sodium, K Potassium

2 valence - Alkaline Earth Metals: Be Beryllium, Mg Magnesium, Ca Calcium

3 valence - Non-metals: B Boron, Al Aluminium

4 valence - Non-metals: C Carbon, Si Silicon

5 valence - Non-metals: N Nitrogen, P Phosphorus

6 valence - Non-metals: O Oxygen, S Sulfur, Se Selenium

7 valence - Halogens: F Fluorine, Cl Chlorine, Br Bromine

8 valence - Noble Gases: He Helium, Ne Neon, Ar Argon

3 0

4 years ago

Indicate whether the following represents a Chemical or Physical change: Milk sours

marusya05 [52]

Answer:

Chemical Change

Explanation:

Physical change normally mean that the change can revert back to its orginal state, which in this case that is not possible therfore it is a chemical change.

4 0

3 years ago

An ionized helium atom has a mass of 6.6 × 10-27 kg and a speed of 5.3 × 105 m/s. It moves perpendicular to a 0.78-T magnetic fi

arsen [322]

Explanation:

In a magnetic field, the radius of the charged particle is as follows.

r = $\frac{mv}{qB}$