4 there is only one type of molecule present and the molecule present contains different elements in it, forming a compound.
You forgot one...and that happens to be the answer---> Accuracy
Explanation:
There are 1000 m in a km, and 100 cm in a m.
2.85×10¹² km × (1000 m / km) × (100 cm / m) = 2.852.85×10¹⁷ cm
Explanation:
(a) The functional group present in an organic compound having the molecular formula C
5
H
10
O
2
is Carboxylic acid group, (−COOH) and its formula is C
4
H
9
COOH
(b) One example each of the compounds having the following functional groups are:
(i) Aldehyde group: Ethanal (CH
3
CHO)
(ii) Alcohol group: Methanol (CH
3
OH)
(iii) Carboxylic acid grou: Ethanoic acid (CH
3
COOH)
(iv) Halo group: Chloromethane (CH
3
Cl)
(c) One example each of the compounds having the following functional groups are:
(i) Alkene group: Ethene (CH
2
=CH
2
)
(ii) Alkyne group: Ethyne (CH≡CH).
Answer:
Ca(NO3)2 + 2 NaCl = 2 NaNO3 + CaCl2
Explanation:
On the left you have an original balance of Ca - 1, N - 2, O - 6, Na - 1, and Cl - 2, and on the right you have a balance of Ca - 1, N - 1, O - 3, Na - 1, Cl - 2.
Ca - 1 Ca - 1
N - 2 N - 1
O - 6 O - 3
Na - 1 Na - 1
Cl - 1 Cl - 2
In order to balance these, you'll have to make both sides equal. To get the N on the right to be equal to the N on the left, you'll have to multiply NaNO3 by 2, thus making it 2NaNO3. By doing this, you will offset the balance of both Na and O.
Ca - 1 Ca - 1
N - 2 N - 2
O - 6 O - 6
Na - 1 Na - 2
Cl - 1 Cl - 2
To balance the rest of the equation, you'll have to multiply both Na and Cl by 2. This will change NaCl to 2NaCl, making the balance look like this:
Ca - 1 Ca - 1
N - 2 N - 2
O - 6 O - 6
Na - 2 Na - 2
Cl - 2 Cl - 2
You will now be left with your final equation Ca(NO3)2 + 2 NaCl = 2 NaNO3 + CaCl2.