3,277 Answered Questions for the topic Science

06/09/21

#### A sample of neon gas occupies a volume of 461 mL atSTP. What is the volume of the neon gas when thepressure is reduced to 0.76 atm?

please show work !!!!!!!!!!!!!!!!!!

06/08/21

#### Stoichiometry.....

1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) Write out all the steps to solve the following problem. 14 moles of O₂ are used to react with propane gas. How many moles of Carbon Dioxide is produced?...
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06/08/21

#### Stoichiometry.........

1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) When solving the following problem, what is your GIVEN? Problem: How many moles of Carbon Dioxide are formed when 7 moles of Propane Gas (C₃H₈) react with...
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Science Chemistry

06/08/21

#### Stoichiometry.......

1 C₅H₁₂(g) + 8 O₂(g) → 5 CO₂(g) + __ H₂O(g) when balancing the above equation, how many moles of water are produced when 1 mole of C₅H₁₂ reacts with excess Oxygen Gas?

Science Chemistry

06/08/21

#### Stoichiometric Calculations

1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) based on this balanced equation, how many moles of water would be produced when 10 moles of oxygen gas (O₂) react with excess propane (C₃H₈)?

#### How much work is done in stretching this spring from a length of 2.5 m to a length of 3.2 m?

A spring with a natural length of 1.8 meters is held at a length of 2.4 meters by a force of 12 N. How much work is done in stretching this spring from a length of 2.5 m to a length of 3.2 m?

#### How much work is required to pump all of the water to a spout even with the top of the tank?

A water tank is shaped like a pyramid with its point down. The top base of the pyramid is a square with 8 meter sides. The bottom point of the pyramid is 10 meters below the center of the top base....
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Science

06/06/21

#### compare the plant cells and animal cells .can they make food? explain.

Please Explain Your Answer. :D

06/04/21

#### atoms to grams of calcium

How many atoms of calcium are in 3456 grams of calcium? a) 5.19e25b) 2.30e-19c) 8.34e28d) 1.43e-22

Science Chemistry

06/04/21

#### Hi, someone please help me with this and how am i gonna know if it's acidic or basic?

Calculate thehydrogen ionconcentration of asolution with a pOHreading of 7.8

#### please if anyone can help

Select the missing reactant for the following combustion reaction2 _______________ + 15 O2 ---> 14 CO2 + 6 H2OGroup of answer choices

#### science problem

How many grams of excess reactant is left over when 60 grams of NaCl reacts with 55 grams of Pb(NO3)2?A) 40 g B) 60 g C) 50 g D) 30 g

#### Question this would be very useful

Which of the pH levels listed is the most acidic?Group of answer choicespH = 1pH = 4pH = 7pH = 14

06/04/21

#### CHEMISRY problem I really need help :)

Which of the following will not conduct electricity when dissolved in water: NaCl, NaOH, HCl, C6H12O6A) C6H12O6B) NaCIC) NaOHD) HCI

06/04/21

#### Chemistry question any help would be appreciated :)

C2H4 + 3 O2 ----> 2 CO2 + 2 H2OIf you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced?Group of answer choicesA) 141.4 g CO2B) 178.9 g CO2C) 78.6 g CO2D)...
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#### question for chemistry

Mg + 2 HNO3 ---> Mg(NO3)2 + H2If I start this reaction with 40.0 grams of magnesium and an excess of nitric acid (HNO3), how many grams of hydrogen gas will I produce? A) 3.3g H2B) 4.5 g H2C)...
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#### Chemistry question please if anyone knows :)

_________ the temperature causes the kinetic energy to increase. Thus, molecules are moving _________ and colliding more _________. This causes the rate of reaction to _________.A) increasing,...
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06/03/21

#### Hello. Please help me it’s down to the wire and I need immediate help with chemistry homework as soon as possible please

S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 110.4 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is a...
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