Answer:
Zinc is an <em>element</em>.
Explanation:
Compounds are composed of two or more elements
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.
Answer:
<h2>The atom having 5 proton (B) atom when a boron become cations , the numbers of protons is still 5 no mater how many electrons are lost . therefor , the three different atomic cations that all have 5 protons:
B<u>+</u><u>,</u><u>B2</u><u>+</u><u> </u><u>and</u><u> </u><u>B3</u><u>+</u></h2>
Answer:
-31.72°F
Explanation:
(-35.4°C × 9/5) + 32 = -31.72°F