Identify the combustion reaction.

a) Al 2S 3 - 2A1 + 35

b) 2H 2 + O2 - 2H 20

c) C12 + 2KBr - 2KCI + Br2

d) C4H 12 + 70 2 - 6H 20 + 4CO 2

What is the density of object with volume of 20 ml and a mass of 5 grams?

How many moles of HNO3 are contained in 500. mL of a 6.00 M solution?

How many milligrams of sodium sulfide are needed to completely react with 25.00 ml of a 0.0100 m aqueous solution of cadmium nitrate, to form a precipitate of cds (s) ?

What does a chemical formula like Na2CO3 tells us?

If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them? O from the hand to the cup O from the cup to the hand O from the cup to the surrounding air Ofrom the hand to surrounding air

Nyatakan tiga aktiviti kerja yang melibatkan proses pengurusan projek reka bentuk.

Which technology works in conjunction with electronic collars to enable scientists to track endangered animals?

In an experiment, having too many variables A might solve the problem faster B could solve more than one problem C will cause too many problems D will not matter

The activation energy decreases with increase in temperature. why?

What are the characteristics of Archaebacteria? A. they are single cells that have a nucleus and tend to live in extreme conditions. B. they are single cells that lack a nucleus and tend to live in extreme conditions. C.