"It is important to balance chemical equations because there must be an equal number of atoms on both sides of the equation to follow the Law of the Conservation of Mass"
<span>H2C2O4(aq) + 2OH- --> C2O4^2- + 2H2O(l)</span>
<u>Answer:</u>
<em>
needed to heat the amount of water giving.
</em>
<u>Explanation:</u>
To solve this question we first need to know the specific heat of water which is given by <em>4.18 joules</em> Per gram for increasing <em>1° of temperature</em>. Now since one gram of water name one joules per gram so 2 grams will need <em>twice of 4.18</em> that is 8.36 similarly 50 grams will need ![50 \times 4.18 = 209](https://tex.z-dn.net/?f=50%20%5Ctimes%204.18%20%3D%20209)
Now we need to calculate the heat for 10° of change because temperature rises from 50° centigrade to 60° centigrade and difference in degrees
<em>so heat needed is=
</em>
<h2>
ANSWER:</h2>
The Freedman's Bureau wanted to help newly freed slaves participate in American society.
<h2>
EXPLANATION:</h2>
The Freedmen's Bureau, formally known as the Bureau of Refugees, Freedmen and Abandoned Lands, was set up in 1865 by Congress to help a large number of previous dark slaves and poor whites in the South in the outcome of the Civil War. The Freedmen's Bureau given nourishment, lodging, and therapeutic guide built up schools and offered lawful help. It additionally endeavored to settle previous slaves ashore appropriated or surrendered amid the war. Be that as it may, the department was kept from completely doing its projects because of a lack of assets and faculty, alongside the legislative issues of race and Reconstruction.
Total density of filled ball with oxygen gas: ![\frac{12g+1.7448g}{0.560g} = 1.5422g/L](https://tex.z-dn.net/?f=%5Cfrac%7B12g%2B1.7448g%7D%7B0.560g%7D%20%3D%201.5422g%2FL)
The relationship between mass and volume can be easily determined using density; for example, the mass of a body is equal to its volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d). The ball filled with hydrogen will float in the air because total density of filled ball is lessor than the density of an air. Density of the evacuated ball D = 0.214 g/L
Density of oxygen gas = ![d_3=1.330g/L](https://tex.z-dn.net/?f=d_3%3D1.330g%2FL)
Mass of the oxygen gas : ![1.330g/L \times 0.560L = 1.7448g/L](https://tex.z-dn.net/?f=1.330g%2FL%20%5Ctimes%200.560L%20%3D%201.7448g%2FL)
Learn more about Mass and Density here:
brainly.com/question/10821730
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