Answer:
The answer to your question is the second choice
Explanation:
Formula to calculate the heat of any substance
Q cal= mCcal ΔTcal
Formula to calculate the heat of a metal. The heat will be negative because it releases heat.
Qm = -mCmΔTm
Now equal both formula
Qcal = Q m
mCcalΔTm = -mCmetΔTmet
-Solve for Cmet
Cmet = -[mCcalΔTm] / mΔTmet
Answer:
I think a toilet because it is use a lot once you think about it
1.55 g/L; 9.503 03 × 10^20 mL
<em>Part 1.
</em>
<em>Step 1</em>. Convert <em>kilograms to grams</em>.
1.55 kg × (1000 g/1 kg) = 1550 g
<em>Step 2</em>. Convert <em>cubic metres to litres</em>.
1 m^3 × (1000 L/1 m^3) = 1000 L
<em>Step 3</em>. Divide <em>grams by litres</em>
1.55 kg/1 m^3 = 1550 g/1000 L = 1.55 g/L
<em>Part 2.</em>
<em>Step 1</em>. Convert <em>cubic kilometres to cubic metres</em>
950 303 km^3 × (1000 m/1 km)^3 = 9.503 03 × 10^14 m^3
<em>Step 2</em>. Convert <em>cubic metres to litres</em>.
9.503 03 × 10^14 m^3 × (1000 L/1 m^3) = 9.503 03 × 10^17 L
<em>Step 3</em>. Convert <em>litres to millilitres</em>.
9.503 03 × 10^17 L × (1000 mL/1 mL) = 9.503 03 × 10^20 mL
The correct answer is D:
it involves breaking molecular bonds between copper compounds
.
The explanation :
-when we melt a copper it is a physical change because the substance is still copper and have the same shape.
- but for example Burning a copper it is a chemical change. Fire activates a chemical reaction between copper and oxygen.
-The oxygen in the air reacts with the copper and the chemical bonds are broken.
- the chemical change is changing the other compound bonded to the copper atoms.
So, the correct answer is D
B- Carbon nitrogen and oxygen. All organisms are made up of carbon, oxygen is essential to breath, and nitrogen makes up most of earth's atmosphere.
