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A helium-filled balloon of the type used in long-distance flying contains 420,000 ft3 (1.2 times 107 L) of helium. Suppose you fill the balloon with helium on the ground, where the pressure is 737 mm Hg and the temperature is 16.0 °C. When the balloon asc...

Hi Please help verify my answer to the following question: 0.500g of pure phosphorous was burned in excess pure oxygen to give a product that has a mass of 1.145 g. What is the empirical formula of the resulting compound? By the use of a mass spectrometer...

Hi Im reposting incase my original post doesn't get read. Please see bottom for additional info that I need help getting verified. Many thanks Hi Please help verify my answer to the following question: 0.500g of pure phosphorous was burned in excess pure...

An ant crawls on a tabletop. It moves 2cm East, turns 3cm 40(degrees) North of East and finally moves 2.5cm North. What is the ants total displacement?

A car travels 12 km West, 18 km South. What is the total car displacement? The car takes 10 minutes to travel from each initial position to final position. What is the average speed and velocity?

CONNEXUS alternate test? A student claims that mass is not conserved in chemical reactions and uses a reaction in which they measure the mass of liquid alcohol then light it on fire, measuring the mass of the liquid (water) remaining in the dish after the...

Use the chemical equation to answer the question. 2Ag(s) + H2S(g) – Ag2S(s) + H2(g) The molar mass of silver (Ag) is 108 g/mol. The molar mass of sulfur (S) is 32 g/mol. The reaction uses 0.04 mol of silver. Which steps show how to determine the mass of s...

When 2 moles of ammonia (NH3) decomposes into nitrogen gas (N2) and hydrogen gas (H2), how many moles of nitrogen gas are produced? 1 mole 2 moles 3 moles 4 moles

Here is wht I did if you can please tell me where I went wrong would be appreciated. resulting compound phosphorous oxide mass = 1.145g # of moles of Phosphorus = 0.500g/30.97g/mol = 0.0161446mol # of grams of combined phosphorus oxide = 1.145g-0.500g (P)...

This is very helpful. I'm sure this will be reviewed in upcoming classes and understanding this information will help me be a bit ahead of the game. Thank you very much for your help, I'm sure it wasn't an easy feast to type all this information down. Ver...

Thank You!!

Could you pleas explain it further? Thanks ;)

what will i divide by 1/3? And why should I divide it by 1/3?

And where did you get 64.9? Is that the velocity or what?

What are quiz answers

Pleaseeee i really need help. my parents are getting mad for not taking quiz yet

Do you have the rest?

I need help Bot

What is the p7 A 1/7 B 1/8 C idk D idk

Probility 7