# Posts by dody

Total # Posts: 13

**phsics**

uniform ladder 25 ft long rests against a smooth vertical wall. The ladder weighs 15 Kg. The lower end of the ladder is 15 ft from the wall. A man weighing 80 Kg climbs up the ladder until he is 20 ft from the base of the ladder, (20 ft of the ladder length not above the floor...

**social studies**

marco polo traved from venice to china i need the aproxmately dates to each place he travelved frm venice to china i need the place and date please someone help

**chemistry**

what is the partial pressure of 02 collected over water at 25 degree C and 630 torr (vapor pressure of H20 at 25 degree C is 23.8 torr)

**Chemistry**

What volume will .00 L of Gas occupy if the temperature is changed form 30 degree C to 90 degree C (P is constant)

**Chemistry**

Wen 4Ag + 2H2S + 02 -> 2Ag2S + 2H20 and the reactants inclde 12 mol Ag, 6 mole of H2S and 96 G of 02 the limiting reactant is?

**Chemistry**

how do I write the equation for How many grams of sodium nitrate are required to form 90.0 grams of water?

**Chemistry**

What is the atomic mass of an element if one hatom has a mass of 2.107 x 10x10 to the -22 power g

**chemistry**

2 Na2 + @H20 -> 4NaOH + 02 Whtes 200. g of Na202 were reacted, 32.0g of 02 were collected The yield of 02 colleced how many percentages?

**Chemistry**

sorry How many moles of exygen are needed to react with 1.6 moles of isopropyl alcohol, C3H7OH Equation is 2 C3H7OH + 9 02 -> 6 CO2 + 8 H20

**Chemistry**

how many moles of oxygen are needed to react with 1.6 moles of isopropyl alcohol, CcH7OH Equation is 2 C3H7OH + 9 02 ->6 CO2 + * H2O

**Chemistry**

How many unpaired electrons are in the electron structure of 24 Cr, [Ar]4s1 3d5

**Chemistry**

The volume of 02 collected over water at 25 degree C and 740 torr, was 250 mL. What volume will the dry 02 occupy at STP? (Vapor pressure of water at 25 degre C is 23.8 torr).

**chemistry**

The volume of 02 collected over water at 25 Celcius and 740 torr was 250 mL. What volume will the dry 0x occupy at STP (Vapor pressure of water at 25 celcuis is 23.8 torr)

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