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Bingel [31]
3 years ago
11

1. Which is not true of binary compounds?

Chemistry
2 answers:
Gennadij [26K]3 years ago
8 0

Just took the test. Correct answer is A. The name of the <u>positively</u> (it should be negatively) charged nonmetal ion is changed to end in –ide.

nignag [31]3 years ago
4 0
Pretty sure it's b but not an definitely
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Astronomers often scan the sky using devices called radio
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A radio telescope is simply a telescope that is designed to receive radio waves from space.

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6 0
2 years ago
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If an unknown element didplays many extremly strong metallic properties, where is it most likely to be located on the periodic t
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4 0
3 years ago
The percent composition of calcium is ?
DochEvi [55]

Answer: 40.1%

Explanation: The mass of calcium in this compound is equal to 40.1 grams because there's one atom of calcium present and calcium has an atomic mass of 40.1 . The molar mass of the compound is 100.1 grams. Using the handy equation above, we get: Mass percent = 40.1 g Ca⁄100.1 g CaCO3 × 100% = 40.1% Ca.

5 0
3 years ago
Consider the reaction between iron (III) oxide, Fe2O3 and carbon monoxide, CO.
Lana71 [14]
<span>Fe2O3 + 3CO --> 2Fe + 3CO2
</span><span>
m(Fe2O3)=213 g
m(CO)=140 g
</span>_______________

<span>n(Fe2O3)=?
m(Fe)=?
n(Fe2O3)=?
n(CO)=?
n(CO2)=?
</span>
<span>n(Fe2O3)=m(Fe2O3) / M(Fe2O3)
n(Fe2O3)= 213 g / 159,7 gmol-1 = 1,33 mol
</span>
<span>n(CO)= m(CO) / M(CO) n(CO)= 140 g / 28,01 gmol-1 = 4,99 mol</span>
3 0
3 years ago
Periods on the periodic table are
Roman55 [17]

Answer:

Periods on the periodic table of elements

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In the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families. (See also The Periodic Table: Metals, Nonmetals, and Metalloids.) In each period (horizontal row), the atomic numbers increase from left to right.

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3 years ago
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