A single replacement reaction
<h3>Further explanation
</h3>
There are two types of chemical reactions that may occur.
namely single-replacement reactions and double-replacement reactions.
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.
This series is better known as the Volta series, where the metal element with a more negative electrode potential is on the left, while the element with a more positive electrode potential on the right.
The more left the position of a metal in the series, the more reactive metal (easy to release electrons, the stronger as the reduction agent)
The metal activity series is expressed in voltaic series
<em>Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-</em><em>Fe</em><em>-Cd-Co-Ni-Sn-Pb- (H) -</em><em>Cu</em><em>-Hg-Ag-Pt-Au </em>
Fe(more active element) takes the place of Cu(less reactive element) in the CuSO4 compound
I just took a quiz on this! It's D!
The first statement (Matter is neither created nor destroyed) is correct.
The second statement would violate the law of conservation of mass (I will refer to this as LCM), as it would mean matter can "flow" into the universe, but not out, meaning the total matter will never be less than it was before.
The third statement violates LCM because it means matter is created during a reaction, which is not true.
The last statement violates LCM because it means matter is lost during a reaction, which is not true.
Here we have to calculate the heat required to raise the temperature of water from 85.0 ⁰F to 50.4 ⁰F.
10.857 kJ heat will be needed to raise the temperature from 50.4 ⁰F to 85.0 ⁰F
The amount of heat required to raise the temperature can be obtained from the equation H = m×s×(t₂-t₁).
Where H = Heat, s =specific gravity = 4.184 J/g.⁰C, m = mass = 135.0 g, t₁ (initial temperature) = 50.4 ⁰F or 10.222 ⁰C and t₂ (final temperature) = 85.0⁰F or 29.444 ⁰C.
On plugging the values we get:
H = 135.0 g × 4.184 J/g.⁰C×(29.444 - 10.222) ⁰C
Or, H = 10857.354 J or 10.857 kJ.
Thus 10857.354 J or 10.857 kJ heat will be needed to raise the temperature.
C). Real GDP is adjusted for price level changes, whereas nominal GDP is not.
<h3>Explanation</h3>
The GDP of a country measures the total value of all final goods and services produced within that country in a certain period of time (typically a year.)
Real GDP is based on nominal GDP, but takes changes in the overall price level into account as well. That's why the two indice are so similar, except for that the value of real GDP but not nominal GDP can be compared over a period of many year to show economic growth.
- Neither real GDP nor nominal GDP measure debt, which isn't part of the output of an economy.
- Both real GDP and nominal GDP take the value of exports into account, as long as the good being sold abroad is made inside that country. Net export is also one of the four types of spendings on the output of an economy.
- Only real GDP is adjusted for changes in the price level. <em>This point sets real and nominal GDP apart.</em>
- Neither real GDP nor nominal GDP counts intermediate goods. To avoid counting the same good or service twice, both indice measure only the value of final goods and services.
