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3 years ago

Given the balanced equation:

Chemistry

1 answer:

Monica [59]3 years ago

7 0

Answer: 7.88375g

Explanation:

Here is the dimensional analysis table

7g O2 | 1 mol O2 | 2 mol H2O | 18.02 g H2O

| 32 g O2 | 1 mol O2 | 1 mol H2O

You use grams to convert to moles of O2, then use that to find grams of H20

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which term refers to the amount of water vapor in the air? A) dew point B) Precipitation C) humidity or D) relative humidity ?

Fudgin [204]

C) Humidity.
The amount of water vapor in the air is called humidity. Don't get it confused with relative humidity, its <span>the amount of water vapor present in air expressed as a percentage of the amount needed for saturation at the same temperature.
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3 years ago

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Which statement describes a major drawback of the Bohr model that caused scientists to replace it?

Kay [80]

Answer:

C.it contradicted the heinsberg uncertainly principle

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3 years ago

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The anticancer drug Platinol (cisplatin), Pt(NH3)2Cl2, reacts with the cancer cell's DNA and interferes with its growth. (a) Wha

USPshnik [31]

Answer:

(a) = 65.018% (b) = 1.807,83 grams

Explanation:

(a)

The mass % of platinum (pt) in platinol can be obtained applying the general percentage formula (portion of interest / total), in this case the platinol its composed of a single platinum (Pt) mole with molecular weight of 195.088 g/mol, two nitrogen (N) mole of 28.012 g/mole each. six hydrogen (H) mole of 1.007 g/m and two chlorine (Cl) of 35.453 g/mole

N= 14.006 g/mole x 2 = 28.012

H= 1.0078 g/mole x 6 = 6.046

Cl= 35.453 g/mole x 2 = 70.906

Pt= 195. 088 g/mole x 1 = 195.088

the molecular weight of platinol its = 300.052g

% of Pt in platinol its = ((195.088 g/mole) /(300.052 g/mole))* 100= 65.018%

(b)

Assumption: 851/9 its in fact 851 $/gram

to know how many grams of Platinum can be bought it's necessary to divided the total money between the price of platinum, knowing how many grams can be bought and knowing the percentage of platinum in platinol, it's possible to know how many grams of platinol can be made from $1.00 million

grams of platinum $1'000.000/(851$/g) = 1.175,09 grams of Pt

grams of platinol =

1.175,09 grams of pt/ 0.65018 (grams of pt/grams of platinol)

grams of platinol = 1.807,83 grams of platinol

7 0

4 years ago

What are the four pieces of information that can be found in a square of the periodic table?

vovikov84 [41]

The number of valence electrons an element may have, the state(metal, gas, etc..) of an element, how likely an element is to "give" or "take" electrons, and what elements can combine together.

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3 years ago

At what temperature does benzene boil when the external pressure is 410 torr ?

kondaur [170]

The temperature at which benzene boils at a given pressure of 410 torr can be deduced from the Clausius Clapeyron equation:

ln(P2/P1) = -ΔHvap/R [1/T2-1/T1] ------(1)

where

ΔHvap = heat of vaporization of benzene

P1 = atmospheric pressure

T1 = normal boiling point

R = gas constant

These values are essentially standard values which can be obtained from any thermochemical data base

For benzene: ΔHvap = 30.72 kJ/mol and T1 = 80 C = 80 +273 = 353 K

R = 0.008314 kJ/K.mol

P1 = 760 torr

P2 = 410 torr

Substituting these values in equation (1) we get:

ln(410/760) = -30.72/0.008314 [1/T2-1/353]

T2 = 337 K

or, T2 = 337 - 273 = 64 C

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3 years ago