Question

1. which of the following is a compound?
a. iron b. sulphur c. water d. carbon

2. how many atoms are there in a molecule of sulphuric acid :-) H²SO⁴

3. which compound contains for atoms of hydrogen?
a.HCL b. NH⁴CL c. CH³CL

4. Calcium has a valency of :-) ______


5. how many hydrogen atoms are are present in a molecule of ammonia :-) _____


6. which of the following element is present in a molecule of ammonia
a. Iron b. Calcium c.Sodium d. Copper






What will those answers?
no spamming .
I need the correct answer.

I am having exam, end user offline for some days.

I need these answers correctly for exam.​

Answer 1

Answer:

this is ur 1 st answer okay

Explanation:

. Air is regarded as a mixture because:

a)Its pressure may very

b)Its temperature may change

c)Its volume changes under different conditions

d)Its composition may vary

Answer 2

Answer:

Plz.Mark me brainliest and thank my 10-5 ans.

Btw,answers r:

1.=Water

2=7(2 Hydrogen atom,1 sulphur atom,4 oxygen atom)

3=(Actually question is wrong,it should be four not for) MethaneCH⁴ but option is not there so HCI

4=The first 30 elements

5=3hydrogen elements

6=Formula NH3 (NITROGEN & HYDROGEN)

none of these

Hope it helps u mate☺

All the best for ur exams❤❤❤

well,gn