Answer:
1) D; 2) B
Explanation:
1) <em>Conservation of atoms
</em>
D is correct.
It has four atoms of H and two of O on each side of the reaction arrow.
A. <em>Wrong</em>. It has the same number of H and O on each side, but it has the <em>wrong product</em>. The reaction forms O₂ molecules, not O atoms.
B. <em>Wrong</em>. Atoms are balanced, but the <em>products are incorrect</em>.
C. <em>Wrong</em>. Atoms are balanced, but the <em>reactants are incorrect</em>.
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2) <em>Chemical equations
</em>
B is correct.
The atoms are balanced, and the equation shows the correct formulas of the molecules.
A. <em>Wrong</em>. Atoms are balanced, and the formulas are correct, but the equation is <em>not in its simplest form</em>. The coefficients are not in their lowest terms. We must divide every coefficient by six to get the correct equation: H₂ + Cl₂ ⟶ 2HCl.
C. <em>Wrong</em>. The <em>reactants are incorrect</em>, and the equation is <em>not in its lowest terms</em>.
D. <em>Wrong</em>. The <em>reactants are incorrect</em>.
Answer:
D. Heat is transferred by the movement of a liquid or gas.
Here are 5 different types of everyday gases people use.
1. Helium helps us blow up balloons for special occasions.
2. Carbon dioxide gives us carbonated drinks.
3. Oxygen helps us weld materials.
4. Propane helps us start fires, or heats things.
5. Butane is in our everyday fire lighters/starters and even torches.
Hope I could help! :)
Answer:
Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Answer:
B. 1:1.
Explanation:
Hello!
In this case, given the following chemical reaction:
We can see that the coefficient in calcium carbonate is 1 and that of carbon dioxide is also 1, therefore the mole ratio between them is B. 1:1.
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