3,205 Answered Questions for the topic Science

#### 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)...
more

#### 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

#### 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

06/03/21

#### Please you don’t understand what I mean when I say I need help please help me with chemistry please I am so desperate

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

06/03/21

#### Hello. It may not seem like it but I am under pressure and need so much help with my chemistry as soon as possible please please please ok please please please please

1.) 2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2OIn the above equation how many moles of N2 can be made when 165.7 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a...
more

06/03/21

#### Hi I need so much help before the school ends and I am crying I am so confused and stressed please help me with my chemistry homework

1.) 2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2OIn the above equation how many moles of N2 can be made when 157.4 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a...
more

06/03/21

#### I need help please if you only you hear my voice youd know how incredibly desperate I am please help me with my Chemistry homework as soon as possible please

1.) S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 163.6 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is...
more

06/03/21

#### Hello so I am under a lot of stress and pressure. Please help me with my chemistry homework quickly please I am on the verge of crying

3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2OIn the above equation how many moles of water can be made when 25 moles of HNO3 are consumed?Sodium chlorate decomposes into sodium chloride and...
more

Science Chemistry

06/03/21

#### Hi can someone please help me with this. Thank you!!

calculate the concentration of the hydrogen ion/hydroxide ion inthe samples below by its pOH level. Identify if the solution is acidic, basic, or neutral.1. Calculate the hydroxideion concentration...
more

06/03/21

#### How do I measure radial growth of a fungi? Is it like measuring size of inhibition zone?

I'm a student researcher studying about antifungal activity. I measure the efficacy of the antifungal agent by the Percent Inhibition of Radial Growth (PIRG). However, I don't know how to measure...
more

Science Chemistry

06/03/21

#### Hi can someone please help me with this. Thank you!!

calculate the concentration of the hydrogen ion/hydroxide ion inthe samples below by its pOH level. Identify if the solution is acidic, basic, or neutral.1. Calculate the hydroxideion concentration...
more

Science Chemistry

06/03/21

#### Hi can someone please help me with this table. Thank you so much!!

Calculating the pH, pOH, and ion concentrationsDirection: Fill-in the missing information in the table. pH I [H 3 O+ ] I pOH I ...
more

#### URGENT- Please help me with honors chemistry molarity

what is the quantity of moles of solute in 145.6 L of 0.812 M sodium cyanide?

#### URGENT: Please help me answer this honors chemistry solubility question.

If 10 grams of potassium chlorate were dissolved in 100 g of water at 70 degrees, how many more grams could be added until the solution was saturated?

06/02/21

#### please help me with honors chem solubility question

Answer all parts:Which solvent, water or hexane (C6H14), would you choose to dissolve each of the following?(a) NaClA. waterB. hexane (b) HFA. waterB. hexane (c) octane (C8H18)A....
more

#### Hi can someone pls help solve this! Thank you so much!!

1. What is the hydrogenion concentration of asolution containing3.98 pH?2. What is the hydroniumion concentration of asolution containing8.98 pH?3. Calculate the hydrogenion concentration of...
more

#### A plane is flying to a city 796 km directly north of its initial location. The plane maintains a speed of 203 km/h relative to the air during its flight.

(a) If the plane flies through a constant headwind blowing south at 55.5 km/h, how much time (in h) will it take to reach the city? ______hb) If instead the plane flies through a constant tailwind...
more

#### Please, Read Question Below!

A ball swings counterclockwise in a vertical circle at the end of a rope 1.29 m long. When the ball is 36.1° past the lowest point on its way up, its total acceleration is ( −17.1 î + 23.4ĵ) m/s2....
more

#### Read the Question Below please!

This figure (|a| = 16.5 m/s^2) represents the total acceleration of a particle moving clockwise in a circle of radius r = 4.40 m at a certain instant of time.(a) For that instant, find the...
more

## Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.

Most questions answered within 4 hours.

#### OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.