John Arcadia

A solution of formic acid is found to have a pH of 2.0. What is the molarity of the solution of formic acid (Ka = 1.78 x 10-4)

H(CHO2) <-----> H+ + CHO2-

Please show me all the steps required to answer this question. I have to solve other questions like this.

Can you please show me how to solve this step by step. I've tried a few times and always get stuck.

How much energy can be produced when we react 100 mL of 2M HCl with sufficient NaOH solution given that:

NaOH(aq) + HCl(aq) -------> NaCl(aq) + H2O(aq) ?H= -56.2kJ/mol HCl

Please show me all the steps and formulas required, because I have to answer some more questions like this!

Thank you!

What volume would 100 moles of H2 occupy at STP?

Can you please show me all the steps and formulas required. I have more questions to answer like this, so any help is appreciated.

Thank you!

How many g of zinc are required to produced 50g of hydrogen when reacting zinc with sulphuric acid?

How many grams of sulphuric acid are required in the previous problem?

I answered:

1. How many g of zinc are required to produced 50g of hydrogen when reacting zinc with sulphuric acid?

Answer-

Zn + H2SO4 = ZnSO4 + H2

Molar mass of Zn – 65.4 g/mol

= 50 g/mol of H * 1 g/mol of H/ 2 moles of H * 65.4 g/mol of Zn/1 mole of Zn

= 50 g/mol of H/2 moles of H * 65.4 g/mol of Zn/1 mole of Zn

= 25 g of H * 65.4 g/mol of Zn/1 mole of Zn

= 1612.5 g/mol of Zn/1 mole of Zn

= 1612.5 grams

= 1612.5 grams of zinc is required to produce 50 g of hydrogen.

2. How many grams of sulphuric acid are required in the previous problem?

Answer-

Molar mass of H2SO4

H- 1 g/mol

My teacher told me the answer is wrong, Any idea where I went wrong?

The balanced chemical equation for the reaction of pentane (C5H12) with oxygen to produce carbon dioxide and water is what?

My teacher has asked me to solve this using mole to mole ratios. I don't know how exactly to do that. Could you please explain it to me step by step.

How many g of silver chloride will be produced by reacting 10g of silver nitrate with sodium chloride?

Can you explain to me how exactly the answer is found. I have to solve other questions like this.

When you are pushed to the side of a car while making a sharp turn, it may feel like the side of the car has developed a gravitational attraction for you. How fast would you have to drive around a circle of radius 30 feet (10 m) to experience an acceleration equal to the acceleration due to gravity?

Some stoves use the heat produced by current flowing through a conductor. If the heating element (conductor) has a resistance of 30 ohms, how long will the burner have to work to heat 500 g of 30°C water up to its boiling point? The specific heat of water is 4.19 x 103 J/kg·°C, and the household voltage is (120V).

Can you please list out all the steps required? I've tried to solve this twice, but ended up with the wrong answer.

There are three particles in a straight line that each have the exact same charge. Particle A is 3cm from particle B, particle B is 1cm from particle C. The electric force exerted by particle A on particle B is 4 x 10-2 N. What is the force exerted by particle C on particle B?

Please tell me how exactly I have to solve this question, I've been stuck on it for a while.

If two spheres, each with a charge of 5C have a force between them of 25N, how far apart are they?

Can you show me the formula and steps required to get the answer?

In an atom, an electron and a proton are separated by a distance of 1 x 10-8m.

a) Find the force on the electron.

b) Assuming a circular orbit (which wouldn't happen, but we'll go with it) Find the velocity of the electron.

Can you please show me all the formulas and steps required to get the answer, I have to solve more questions like this!

Thank you!

When eaten, oil molecules, such as those in olive oil, go through hundreds of reactions in the human body. Eventually, though, the final result is that the oil molecules and oxygen (breathed from the air) are metabolized into carbon dioxide and water molecules. If you add up the enthalpies of all the reactions involved in this process, would the overall result be exothermic or endothermic?

My teacher told me the answer is simple all I have to do is read Hess's law. I've reread Hess's law 3 times and I just can't grasp it how to answer this.

This is a two part question.

1. The equation that governs the circular orbit of a satellite is T = 2(pi)√(r3 / Gme) where me is the mass of the earth, which is approximately 6 x 1024kg. Assuming a circular orbit, to achieve an orbit at 20,000km, what would the speed need to be?

2. Which of the symbols in the equation for the period of the orbit from #1 are constants?

Please show me all the formulas and steps you used. I need to solve more questions like this!

Thank you for your help in advance.

A 1000-kg car takes a 90 degree turn (1/4 of a circle) with a radius of 3.0 m in 2.4 seconds. Calculate the speed, acceleration, and net force for the car.

Can you please show all formulas and steps required to solve this question, I have to solve others like this! Thank you!

Write a balanced chemical equation for the reaction in which sodium bicarbonate and hydrogen acetate make water, carbon dioxide and sodium acetate. This is the reaction you see when you mix baking soda (sodium bicarbonate) and vinegar (hydrogen acetate or acetic acid).

Thank you for your help in advance! :)

1. A car drives by at 20mph, with a violinist in it playing a song. The speed of sound is 343 m/s. The violin is actually playing at 800Hz, what frequency do you hear before and after the car passes you?

2. The speed of sound in water is 1482 m/s. If question number 1 were underwater, how would the results differ?

Please show me all the formula's and steps required to get the answers. I need to solve some more questions like these!

Thank you!

A lightning flash is seen and thunder is heard three seconds later. If the speed of sound is 340 m/s and the speed of light is 3x10^8 m/s, how far away did the lightning strike?

Please show me all the step and formulas used to solve this question. I have to solve a couple more like this one and want to understand exactly how it's solved!

Thank you so much for your help!