Answer:
True
Explanation:
when a physical change occurs in a substance, the appearance might change but the chemical identity remains same. For example, if liquid water is heated, the water changes to gaseous form .This means the appearance of the water has changed, but the chemical identity remains same as both liquid water and steam has both oxygen and hydrogen as the component molecules or atoms.
Answer:
0.59 mol Na2CO3
Explanation:
M(Na2CO3) = 2*23.0 + 12.0 + 3*16.0 = 106 g/mol
63 g Na2CO3 * 1 mol Na2CO3/106 g Na2CO3 = 0.59 mol Na2CO3
Answer:
- <u><em>B. Structural</em></u>
Explanation:
The <em>atomic </em>or molecular <em>formula </em>represents each kind of atom by its chemical symbol and the number of each kind of atom by a subscript, but it does not show how they are connected. Thus, many different compounds have the same atomic or molecular formula.
The <em>skeletal formula</em> is a kind of abbreviated molecular formula in which the carbon and hydrogen atoms are not indicated but are understood. The skeletal formula shows the chain, the double and triple bonds, and the atoms different to carbon and hydrogen. Each vertex on the chain represents on carbon atom, and the hydrogen atoms (not shown) are the needed to complete the four valence electrons of each carbon atom.
The<em> structural formula </em>shows each atom, using the chemical symbol, and how they are connected in the compound, i.e. the bonds, using short lines.
For instance, the structural formula for the simplest organic compound, methane, CH₄, is:
H
|
H - C - H
|
H
There are 2.4 cups of sugar in the gallon of sweet tea.
<h3>What is the conversion of fluid measurement?</h3>
The conversion of fluid measure takes a standard analysis where the assumed container of a particular fluid is related to another container.
For example, we have two containers here:
We need to know how many glass cups that are present in a gallon. From standard conversion rates:
However,
We learned that 1 cup contains 15% of sugar; Therefore, 16 cups will contain:
= 16 × 0.15
= 2.4 cups of sugar
Learn more about measurement conversion here:
brainly.com/question/777464
