CaCO3 <span>→</span> CaO + CO<span>2
</span>H2CO3 →<span> H</span>2O<span> + CO</span>2<span>
</span>
Answer:
slaked lime - Ca(OH)2
Ca(OH)2 + CO2 ----> CaCO3(solid) + H2O
X is CO2
Answer:
1.
molecules of CO₂
2. 10⁴ molecules of H₂O
3. 8.75×10³² molecules of C₆H₁₂O₆
Explanation:
1.
molecules of CO₂
2. 10⁴ molecules of H₂O
3. 8.75×10³² molecules of C₆H₁₂O₆
Answer:
190 g
Explanation:
Knowing that:
- O₂ gas in air: 0.28 g O₂ / L of air
- Air inhaled at rest: 19.3 fl.oz. air / breath
- Human takes 20 breaths / min
The grams of oxygen gas (O₂) that a human at rest inhales in 1 hour (60 minutes) will be calculated as:
grams of O₂ = breaths in 1 hour * air inhaled per breath * amount of O₂ in air

grams of O₂ = 191.78 g
190 g of O₂ are inhaled in 1 hour (written in correct number of significant figures)
*In the calculation the amount of air inhaled per breath was converted from fl.oz. to Liters knowing that <em>1 L = 33.814 fl.oz.</em>
<span>Genetic engineering is the
direct treatment of an organism’s genome using biotechnology. It is a set of
technologies used to alter the genetic makeup of cells, together with the transport
of genes within and across species boundaries to produce improved organisms.</span>