<span>The correct option is: It's solid form is less dense than the liquid form.</span>
Answer: briitle would be easy to dislove
Explanation:
A substance in the air which can change the surface of limestone would be oxygen, O2.
The neutralization reaction goes according to the scheme
H⁺ + OH⁻ = H₂O
acid and base react, salt and water are formed
NaOH + HNO₃ = NaNO₃ + H₂O
2KOH + H₂SO₄ = K₂SO₄ + 2H₂O
Answer is: 13500 cal.
m(water) = V(water)·d(water) = 300ml·1g/ml = 300g.
ΔT = 45°C, temperature change.
<span>Calorie is amount of </span>energy<span> (heat) needed to increase the temperature of one </span>gram<span> of </span>water by 1°<span>C.
</span><span>To raise the temperature of 300 grams of water for 45°C:
</span>Heat in calories = mass in gram x temperature change °C x specific heat (cal / gram·°C). Q = m·ΔT·c.
Q = 300g · 45°C · 1cal/g·°C = 13500 cal.
