2 years ago

List 10 ways to reduce air pollution at home

1 answer:

8 0

Don't smoke, drive less, don't let toast burn, use an electrical fire instead of a wood one....
I can't think of anything else.

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A metal cube has a mass of 20 g and a volume of 5 ml. What is the density? Is the cube made of pure aluminum? Explain your answe

Shtirlitz [24]

Explanation:

Given that,

Mass of metal cube, m = 20 g

Volume of cube, V =5 mL

We need to find the density of the cube. Mass per unit volume equals density.

$d=\dfrac{m}{V}\\\\d=\dfrac{20\ g}{5\ mL}\\\\d=4\ g/mL$

So, the density of the cube is 4 g/ml.

We know that the density of Aluminium is 4 g/mL.

So, the cube is not Aluminium cube.

3 0

3 years ago

The equation for one of the reactions in the process of turning iron ore into the metal is

Leona [35]

Answer:

2100g or 2.1kg

Explanation:

Based on the equation given,

One mole of Fe2O3 gives two moles of Fe

Molar mass for Fe2O3 is 160g/mol

Molar mass for two Fe is 112g/mol

Convert 3kg to gram

3×1000=3000grams

160g of Fe2O3-112 g of Fe

3000g of Fe2O3-xg of Fe

Xg=3000×112/160

Xg=2100g

To convert to kg

2100/1000=2.1kg

Mass of Fe is 2.1kg

7 0

3 years ago

Gina made a poster for plastic recycling week and included this information on her poster:

Aloiza [94]

Answer:

Gina Should Put Rubber Tires Under The Synthetic Category

Gina Should Put Starch Under The Natural Category

Explanation:

Edge 2020

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3 years ago

Read 2 more answers

Si2Br6 compound name

Anna71 [15]

Answer:

disilicon hexabromide

Explanation:

6 0

2 years ago

What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?

slavikrds [6]

26.7% is the percent composition by mass of sulfur in a compound named magnesium sulfate. Explanation: Molar mass of compound = 120 g/mol.

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2 years ago