3,202 Answered Questions for the topic Science

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

06/01/21

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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

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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

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

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

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

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

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

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
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-
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
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

05/29/21

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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
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?

05/28/21

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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

05/28/21

please help me with this honors chemistry problem about solutions

Which aqueous solution of the following substances does not conduct an electric current?A. potassium hydroxideB. hydrogen bromide   C.  cesium iodideD. glucose, C6H12O6

05/28/21

please help me with this chemistry solutions problem

Which of the following solutions will be the best conductor of electrical current?A. ethylene glycol, C2H6O2(aq)B. potassium chloride, KCl(aq)     C. methyl alcohol, CH3OH(aq)D. bromine, Br2(aq)E.... more

05/28/21

please answer this solutions problem in honors chemistry

In some cases, the force of the attraction between the ions is so strong that it cannot be overcome by the interaction of the ions with the water molecules.A. trueB. false   

05/28/21

please hep with this honors chemistry solutions problem

A solution component present in lesser quantity than the solvent is called a(n)A. soluteB. mixture    C. diluentD. alloy.

05/28/21

please help me with this chemistry solutions problem

A solid solution of zinc in copper is an example of a(n)A. soluteB. solvent    C. alloyD. heterogeneous mixture.

05/28/21

please help me with honors chemistry solutions question

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is dissolved in water?A. 0.18 molB. 0.81 mol     C. 0.27 molD. 0.090 molE. 0.54 mol

05/28/21

please help me with this solutions problem for honors chemistry

Which of the following solutions will be the poorest conductor of electrical current?A. sulfuric acid, H2SO4(aq)B. lithium hydroxide, LiOH(aq)     C. sodium chloride, NaCl(aq)D. potassium nitrate,... more

05/28/21

Please help with honors chemistry solutions problem

Which must be present in an aqueous solution for it to conduct an electric current?a. acidb. base    c. ionsd. molecules

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