Answer:
d. N
Explanation:
Chemical equation:
Pb(NO₃)₂(aq) + K₂SO₄(aq) → PbSO₄(s) + KNO₃(aq)
Balanced Chemical equation:
Pb(NO₃)₂(aq) + K₂SO₄(aq) → PbSO₄(s) + 2KNO₃(aq)
Ionic equation:
Pb²⁺(aq) + 2NO₃⁻(aq) + 2K⁺(aq) + SO₄²⁻(aq) → PbSO₄(s) + 2K⁺(aq) + 2NO₃⁻(aq)
Net ionic equation:
Pb²⁺(aq) + SO₄²⁻(aq) → PbSO₄(s)
The NO₃⁻(aq) and K⁺(aq)are spectator ions that's why these are not written in net ionic equation. The PbSO₄ can not be splitted into ions because it is present in solid form.
Spectator ions:
These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.
Two electrons
Explanation:
The number of electrons needed to form one single bond is two electrons. A bond is formed when two atoms comes together and exchange their valence electron. Some atoms prefers to share their valence electrons and are called covalent compounds.
- To form a single bond, the two atoms must donate an electron each.
- Double bond is formed by four electrons
- Triple bond is formed by six electrons in the vicinity of the atoms.
- The region where the bond forms is rich in a lot of mobile electrons
learn more:
Covalent bonds brainly.com/question/6029316
#learnwithBrainly
Answer:
45.2 mL must be meausred for the experiment
Explanation:
The density of the acetic acid is 1.105 g/mL, so this data gives the information about how many grams are contained in 1mL of volume.
Notice that 1 mL = 1 cm³
Acetic acid Density = Acetic acid mass / acetic acid volume
1.105 g/mL = 50 g / acetic acid volume
Acetic acid volume = 50 g / 1.105g/mL ⇒ 42.5 mL
Answer:
The answer to your question is: below
Explanation:
Reaction with water, sodium is very reactive, sometimes explosive with water, so we can identified it from the other metals. Magnesium is less reactive than sodium, but in the presence of water it can produce bubbles.
Then we can identify copper and stainless steel because of the shine and they conduct electricity (conductivity).
<span>Na</span>₂<span>CO</span>₃<span> + 2 HCl = 2 NaCl + CO</span>₂<span> + H</span>₂<span>O
106 g Na</span>₂CO₃ -------- 2 x 36.5 g HCl
<span> x g Na</span>₂CO₃ ---------- 750 g HCl
<span>
Mass of Na</span>₂CO₃ = 750 x 106 / 2 x 36.5
<span>
Mass ( Na</span>₂CO₃) = 79500 / 73
<span>
Mass = 1089.04 g
Number of moles = 1089.04 / 106 => 10.27 mols of Na</span>₂CO₃
<span>
hope this helps!
</span><span>
</span>