3,277 Answered Questions for the topic Science

06/03/21

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

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

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

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

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

06/03/21

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

06/02/21

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

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

06/02/21

#### 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

06/01/21

#### 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

06/01/21

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

06/01/21

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

06/01/21

NASA's Ames Research Center in Mountain View, California, houses a 20g centrifuge used to conduct research and training to solve real world problems related to the effects of acceleration on... more

06/01/21

A particle initially located at the origin has an acceleration of vector a = 2.00ĵ m/s2 and an initial velocity of vector vi = 6.00î m/s. (a) Find the vector position of the particle at any... more

06/01/21

To start an avalanche on a mountain slope, an artillery shell is fired with an initial velocity of 310 m/s at 58.0° above the horizontal. It explodes on the mountainside 41.0 s after firing. What... more

06/01/21

A human expedition lands on an alien moon. One of the explorers is able to jump a maximum distance of 17.5 m with an initial speed of 3.20 m/s. Find the gravitational acceleration on the surface of... more

06/01/21

Suppose the position vector for a particle is given as a function of time by r (t) = x(t)î + y(t)ĵ, with x(t) = at + b and y(t) = ct2 + d, where a = 2.00 m/s, b = 1.50 m, c = 0.129 m/s2, and d =... more

06/01/21

A bus driver heads south with a steady speed of v1 = 20.0 m/s for t1 = 3.00 min, then makes a right turn and travels at v2 = 25.0 m/s for t2 = 3.00 min, and then drives northwest at v3=... more

06/01/21

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 (ℳ = 106.45 g/mol).A. 419 gB.... more

06/01/21

Lithium hydroxide is used in alkaline batteries. Calculate the molarity of a solution prepared by dissolving 1.495 moles of LiOH in enough water to give a final volume of 750. mL.A. 0.502 MB.... more

06/01/21