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arsen [322]
2 years ago
14

After learning about climate change in her science class, Selena wants to make a few changes at home so she can affect climate c

hange in a small way. Which changes will give her the best results?
A. Switch off appliances that are not in use.
B. Study harder for school tests.
C. Eat more nutritious foods.
D. Recycle used books and magazines.
E. Assist her father with household chores.
Chemistry
2 answers:
monitta2 years ago
6 0

Answer:

The correct option are A and D.

Explanation:

A. Switch off appliances that are not in use.

D.Recycle used books and magazines;

This is because of following reasons:

  • Switching of the appliances when not in use will save the electrical energy from wastage.
  • As it will also indirectly save other useful resources from which this electrical energy is generated.
  • With less use of energy she will also able to save money.
  • By recycling books and magazines she able to reduce paper wastage.
  • She will be able to create more clean and green environment.
  • By recycling books and magazines she will be able to save trees from cutting down from which paper is manufactured.

lorasvet [3.4K]2 years ago
3 0

A. Switch off appliances that are not in use

D. Recycle used books and magazines

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In two or more complete sentences describe all of the van der Waals forces that exist between molecules of sulfur
zavuch27 [327]

Answer:

Dipole-Dipole attraction

Explanation:

Dipole-dipole attraction is a type of vander waals forces found in the molecules of sulfur dioxide.

Vander waals forces are weak attractions joining non-polar and polar molecules together. They are of two types:

  • London dispersion forces which are weak attractions found between non-polar molecules.
  • Dipole-Dipole attraction are the forces of attraction which exists between polar molecules. Such molecules have permanent dipoles. This implies that the positive pole of one molecule attracts the negative pole of another. This is what happens between the oxygen and sulfur molecules.
3 0
2 years ago
Read 2 more answers
During a titration the following data were collected. A 10. mL portion of an unknown monoprotic acid solution was titrated with
Liula [17]

Answer:

8.0 moles

Explanation:

Since the acid is monoprotic, 1 mole of the acid will be required to stochiometrically react with 1 mole of NaOH.

Using the formula: \frac{concentration of acid X volume of acid}{concentration of base X volume of base} = \frac{mole of acid}{mole of base}

Concentration of acid = ?

Volume of acid = 10 mL

Concentration of base = 1.0 M

Volume of base = 40 mL

mole of acid = 1

mole of base = 1

Substitute into the equation:

\frac{concentration of acid X 10}{1.0 X 40} = \frac{1}{1}

Concentration of acid = 40/10 = 4.0 M

To determine the number of moles of acid present in 2.0 liters of the unknown solution:

Number of moles = Molarity x volume

molarity = 4.0 M

Volume = 2.0 Liters

Hence,

Number of moles = 4.0 x 2.0 = 8 moles

8 0
2 years ago
In a chemical reaction that takes place at a fixed pressure and volume, the enthalpy change (ΔH) is –585 kJ/mol. Will this react
Molodets [167]

by sign convention ΔH is negative it means an exothermic reaction where the heat is lose so the temperature decreases.

5 0
2 years ago
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If you perform the experiment described in investigation #15 by mixing 10 g of glue with 13 g of water and 8 g of sodium borate
Phantasy [73]

10 g of glue with 13 g of water ,

Mass ratio of the material can be calculated as:    

\frac{Mass of glue}{Mass of glue + Mass of water}  

\frac{10 g}{10 g + 13 g }  

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8 g of sodium borate suspended in 11 g of water, mass ratio can be calculated as:

\frac{Mass of sodium borate}{Mass of sodium borate + Mass of water}  

\frac{ 8 g}{ 8 g + 11 g }  

\frac{8 g}{19 g }

3 0
2 years ago
What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 Kg of water?
Nesterboy [21]
Density H2O = 1g/cm³
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3moles of NaCl-----in---------1500cm³ H2O
x moles of NaCl ----in--------1000cm³ H2O
x = 2moles of NaCl

answer: 2 mol/dm³
5 0
2 years ago
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