3,277 Answered Questions for the topic Science

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?... more

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... more
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)?
Science Calculus Physics

06/07/21

#### 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?
Science Calculus Physics

06/07/21

#### 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.... more
Science

06/06/21

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

06/05/21

How can you improve the accuracy of a specific heat capacity experiment?

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

06/04/21

#### please if anyone can help

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

06/04/21

#### 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

06/04/21

#### 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

#### Balance the equation

Balance the equation___C3H8 + ____O2 --->___ CO2 + ____H2O

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)... more

06/04/21

#### 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)... more

06/04/21

#### 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,... more

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... more

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