2 years ago

Which is the formula for diarsenic pentoxide?

Chemistry

1 answer:

Andre45 [30]2 years ago

4 0

The formula is As205

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A compound has a molar mass of 90. grams per mole and the empirical formula CH2O. What is the molecular formula of this compound

k0ka [10]

Answer:

C₃H₆O₃

Explanation:

Data:

EF = CH₂O

MM = 90. g/mol

Calculations:

EF Mass = (12.01 + 2.016 + 16.00) u = 30.03 u

The molecular formula is an integral multiple of the empirical formula.

MF = (EF)ₙ

$n = \dfrac{\text{MF Mass}}{\text{EF Mass }} = \dfrac{\text{90. u}}{\text{30.03 u}} = 3.00 \approx 3$

MF = (CH₂O)₃ = C₃H₆O₃

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3 years ago

Which of the following is not the same as 12.5 millimeters

jek_recluse [69]

I got <span>0.00125 hm . Hope I helped, and good luck(: </span>

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2 years ago

What graph would you use if you wanted to compare similar data for several individual items or events?

Soloha48 [4]

Answer:

A. Bar graph

Explanation:

Bar graphs are used to compare things between different groups or to track changes over time.

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1 year ago

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When determining the specific heat from a given metal in a calorimeter the mass of the water remains constant, but the mass of t

alexandr1967 [171]

The heat is hotter than cold

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3 years ago

Titanium metal is used as a structural material in many high-tech applications such as in jet engines.

Elza [17]

Answer:

a. $Cp=0.523$

b. $Cp=25.02\frac{J}{mol^\circ C}$

Explanation:

a. First, we solve the specific heat equation as follows:

$Q=mCp\Delta T\\Cp=\frac{Q}{m\Delta T}\\Cp=\frac{89.7J}{33.0g\times5.20^\circ C}=0.523$

b. Then, we use the molar mass of titanium to determine its molar heat capacity, as follows:

$Cp=0.523\frac{J}{g^\circ C}\times 47.87\frac{g}{mol}\\Cp=25.02\frac{J}{mol^\circ C}$

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2 years ago