4,347 Answered Questions for the topic Science

04/22/20

What mass of iron(III) chloride is produced when 100.0 mL of 0.100 M solution of barium chloride is reacted with 50.00 mL of 0.150 M solution of iron(III) sulfate?What's the limiting, excess reactant?
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04/22/20

How many atoms are there in 0.228 moles of water?
using dimensional analysis?
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04/22/20

How many molecules of nitrogen are there in 7.55 moles of N₂?
using dimensional analysis?
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Science Chemistry

04/22/20

What is the percent composition for all the elements in ammonium sulfite? 4). % N ______ 5). % H ______ 6). % S ______ 7). % O ______

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Science Chemistry

04/22/20

Chemistry question on net ionic equations! Not sure how to write it
What is the salt/ppt equation for AgNO3, Ag2SO4, BaCl2·2H2O, Na2SO4·10H20 and Ca(NO3)2?
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Science Physics

04/21/20

Push Mower Force (Physics)
An environmentally conscious physics student mows her lawn with a push mower, exerting a force of 187 N along the handle. How much force is actually being used to push the mower forward along the... more
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Science Chemistry

04/21/20

In the following reaction; 2 Mg(s) + CO2(s)  2 MgO(s) + C(s), how many grams of MgO can be produced from 5.7 moles of Mg?
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Science Chemistry

04/21/20

What is the empirical formula for a compound consisting of 72.2% magnesium and 27.8% nitrogen by mass?
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Science Chemistry

04/21/20

Question in the description, can you please explain how you got the answer, thank you
What is the empirical formula for the following molecular formulas?1). C6H12O22 ___________________ 2). Fe2O3 ___________________ 3). C2H2 ___________________
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Science

04/21/20

Independent and Dependent Variables
Different rose bushes are grown in a greenhouse for two months. The number of flowers on each bush is counted at the end of an experiment. What is the IV?Different rose bushes are grown in a... more
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04/21/20

What is the mass of 3.01 x 10²² molecules of carbon dioxide at STP?
using dimensional analysis
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04/21/20

What volume, in liters, at STP, is occupied by 3.30 X 10²³ molecules of oxygen gas?
using dimensional analysis
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04/21/20

Circuit problems
1) How many 60 W light bulbs could be plugged into a 110 V circuit protected by a 15A circuit breaker?2) At $0.15 per kW•h, how much will it cost (for electricity) for a family to prepare a dinner?... more
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04/20/20

calculating mass/volume at STP
1) What is the mass of 75.0 L of methane gas (CH₄) measured at STP?2) What volume, in liters, will be occupied by 48.8 g of helium gas at STP?3) What volume, in liters, at STP, is occupied by 3.30... more
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Science

04/20/20

Molarity practice
80.0 grams of NaOH is dissolved in water to make a 6.00L solution. What is the molarity of the solution?
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Science Biology

04/19/20

What's the process used to form the covalent peptide bonds that join amino acids into a polypeptide?
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04/19/20

What is the volume of hydrogen at a pressure of 1.06 atm if 200 cm3 of hydrogen is collected at a pressure of 1.00 atm?
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Science Chemistry

04/19/20

A question in my lab is confusing me. It simply says "write the formation equation for X (aq), MX (s), and M+ (aq). Assume all atoms used are monoatomic species in standard state. what should I do?
Our lab is on calorimeter and this is one of the questions it asked. A question in my lab is confusing me. It simply says "write the formation equation for X (aq), MX (s), and M+ (aq). Assume all... more
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04/18/20

From the volume, temperature, and pressure calculate the number of moles and the mass in grams for the gas listed below.
5.00 L SO2 at 21°C and 0.95 atm
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04/18/20

Determine the volume occupied by 0.582 moles of a gas at 15°C if the pressure is 622 mmHg.
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04/18/20

What is the volume of a gas at -20°C if the gas occupied 50.0 cm3 at a temperature of 0°C?
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04/18/20

If a sample of a gas occupies 6.8 L at 327°C, what will be its volume at 27°C if the pressure does not change?
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04/18/20

A gas sample occupies 200 mL at 760 mmHg. What volume does the gas occupy at 400 mmHg?
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04/18/20

What is the volume of hydrogen at a pressure of 1.06 atm if 200 cm3 of hydrogen is collected at a pressure of 1.00 atm?
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Science Math

04/17/20

math/science question
I can walk 160 m/min. If I want to cover a distance of 9600 meters, how long will it take me?
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