4,365 Answered Questions for the topic Science

06/03/21

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? 
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06/02/21

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?
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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
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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
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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
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06/01/21

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
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06/01/21

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
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06/01/21

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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
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06/01/21

Please, Read Question Below!
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
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06/01/21

Please Read Question Below!
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
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06/01/21

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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
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06/01/21

Read the Question Below please!
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
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06/01/21

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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
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06/01/21

please help me with honors chem molarity question
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
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06/01/21

please help me with honors chem molarity question
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
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06/01/21

please help me with honors chem molarity question
Ammonia will react with fluorine to produce dinitrogen tetrafluoride and hydrogen fluoride (used in production of aluminum, in uranium processing, and in frosting of light bulbs).2 NH3(g) + 5... more
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06/01/21

please help me with honors chem molarity question
How many grams of NaH2PO4 are needed to react with 33.29 mL of 0.285 M NaOH?NaH2PO4(s) + 2 NaOH(aq)  Na3PO4(aq) + 2 H2O(l)------------------------------- g
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06/01/21

please help me with honors chem molarity question

How many milliliters of 0.55 M HCl are needed to react with 6.3 g of CaCO3?2 HCl(aq) + CaCO3(s)  CaCl2(aq) + CO2(g) + H2O(l)-------------------- mL
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06/01/21

please help me with honors chem molarity
Calculate each of the following quantities.(a) grams of solute in 164.8 mL of 0.207 M calcium acetate  ---------------g(b) molarity of 584 mL solution containing 21.1 g of potassium... more
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Science Chemistry

05/30/21

i pls help me identify the Bronsted-Lowry acid, Bronsted-Lowry base, and conjugates in each chemical reaction
HClO4+ H2O ⇆ H3O+ + ClO4- H2O+H2SO4 ⇆ HSO4- + H3O+ H2O+HCO3- ⇆ CO32- +H3O- H2O+ H2O ⇆ H3O+ OH-
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Science Chemistry

05/30/21

I'm really struggling with this Chemistry problem. Can someone please help me with this?
When 45.0 mL of 4.8 M HCl reacts with an excess of Mg(OH)2, how many grams of Magnesium Chloride (MgCl2) are produced, given the unbalanced equation HCl + Mg(OH)2 → H2O + MgCl2?A. 0.11 molesB. 0.11... more
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Science Chemistry

05/30/21

Can someone please help me with this Chemistry problem?
600.0 mL of H2SO4 is titrated with a 6.0 M solution of NaOH and requires only 6.8 mL of NaOH to reach the endpoint. According to the unbalanced equation H2SO4 + NaOH → H2O + Na2SO4, what is the... more
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05/29/21

Please Read Question Below!
A member of the basketball team jumps straight up and their center of mass has a speed of 3.32 m/s as they leave the court. How high above this point is their center of mass at the following times?... more
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Science Chemistry

05/28/21

Stoichiometric Calculations
C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(g). Using your balanced equation, If 15 moles of Propane Gas (C₃H₈) react with excess Oxygen gas, how many moles of water will be formed?
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05/28/21

Please Read Question Below!
A box proceeds along the x-axis and the figure below shows a record of its velocity as a function of time. Every gridline along the vertical axis corresponds to 2.00 m/s and each gridline along the... more
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