Answer:
Explanation:
1 . Write the chemical equation.
2 . Calculate the moles of product from the first reactant.
3 . Calculate the moles of product from the second reactant.
4 . Identify the limiting reactant and the excess reactant.
5 . Calculate the mass of excess reactant used up.
6 . Calculate the mass of unused excess reactant.
7 . Calculate the mass of limiting reactant needed to react with the 8 . unused excess reactant.
Answer:
Explanation:
An element whose atomic number is 68 (number Z), has 68 electrons and 68 protons. According to the periodic table it corresponds to the element Erbium (Er), whose mass number (A) is 167. The number of neutrons is 167-68 = 99.
Work your way from years to months to days to hours to minutes to seconds.
Answer/Explanation:
A geyser is hot water erupting from a vent in the earth. Geysers are somewhat rare and occur in certain parts of the earth. Underneath, there are hidden chambers that provide constant flows of water. Sometimes when the tectonic plate of the earth move, it leaves gaps in between the hot earth's inner core and the ground. The magma inside is able to heat up the water from the earth. Since hot particle tend to rise, the water explodes out of the vent with such power from the heat.
Answer:
113.8 J.
Explanation:
The following data were obtained from the question:
Mass (M) = 8.2 g
Change in temperature (ΔT) = 3.32 °C
Specific heat capacity (C) = 4.18 J/gºC
Heat required (Q) =..?
The heat required to raise the temperature of the water by 3.32 °C
can be obtained as follow:
Q = MCΔT
Q = 8.2 × 4.18 × 3.32
Q = 113.8 J
Therefore, the amount of heat required to raise the temperature of the water is 113.8 J.
