04/07/24

chemistry partial pressures
A(n) 972 mL sample of hydrogen was collected over water at 21.0◦C on a day when the barometric pressure was 757 torr. What volume would the dry hydrogen occupy under standard conditions? The vapor... more
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05/19/23

What mass, in grams, of phosphorus trichloride will be produced from the 85.0 grams of phosphorus when it reacts with excess chlorine gas?

_____ P4 + ____ Cl2 → _____ PCl3
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05/10/23

20 grams NaCl are dissolved in water to make a 0.85 M solution. What is the volume of the solution in mL
Need help on a homework assigment
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05/08/23

Calculate the unknown quantity: P = ? mm Hg V = 1,673 mL n = 0.04 mol T = 318 K
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05/04/23

What is exponential growth and exponential decay?
How would you describe exponential growth and exponential decay to someone unfamiliar with these phrases?
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05/03/23

Write an equation of a line parallel to the line y−5=4/3(x−2).
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05/03/23

Chemistry Molarity Problem
What is the molarity of a hydrochloric acid (HCl) solution if 20.0 mL of 0.0952 M sodium hydroxide (NaOH) is needed to neutralize 10.5 mL of the acid solution?
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05/03/23

The Tibetan Plateau is what geologists call a _________.
The Tibetan Plateau is what geologists call a _________.Massif, Mesa, Mountain, or Steppe
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05/02/23

Which Indian empire was largely in control of the region before the proliferation of European colonization to South Asia?
Which Indian empire was largely in control of the region before the proliferation of European colonization to South Asia?
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05/01/23

Algebra 1 Question
Employees of a furniture manufacturing company spend no more than 125 hours each day building a combination of tables and chairs. It takes 5 hours to build a table and 2 hours to build a chair. The... more
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05/01/23

Calcium is a nontoxic metal that is used in supplements to maintain strong bones. Under high pressure conditions, over about 320,000 atm . How many atoms of Ca are present in each unit cell?
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04/30/23

Balance the following redox reaction occurring in basic solution: ClO−(aq)+Cr(OH)4−(aq)→CrO42−(aq)+Cl−(aq)
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04/29/23

Chemistry related

Heating zine sulfide in air causes the formation of (A)Zn and S. (B)Zn and SO2(C)ZnO and S(D)ZnO and SO2(E)Zn and SO3could you explain why you got that answer?
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04/29/23

Chemistry related

Which instrument is used to measure the gain or loss of heat?(A)manometer(B)hydrometer(C)calorimeter(D) barometer(E)voltmetercould you explain why you got that answer
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04/28/23

classify the following
Classify the following reactions as synthesis, decomposition, single displacement, double displacement, precipitation, acid-base neutralization, oxidation-reduction, or combustion. Each reaction... more
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04/28/23

Chemistry related

Which statement most accurately describes the behavior of a catalyst?(A)A catalyst increases the change of G of a reaction and hence the forward rate.(B)A catalyst reduces the change of H of a... more
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04/28/23

trig homework help
To estimate the height of a building, two students find the angle of elevation from a point (at ground level) down the street from the building to the top of the building is 36∘. From a point that... more
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04/28/23

trig homework help
A parallelogram has sides of lengths 6 and 9, and one angle is 33°.What is the length of the smaller diagonal? length =  unitsWhat is the length of the longer diagonal? length =  units
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04/27/23

Which pair of elements have the same number of neutrons
Which pair of elements have the same number of neutrons. In 21H, the atomic number is 1 and atomic mass is 2.Group of answer choices126C, 115B115B, 105B146C, 147N31H, 21H126C, 105B
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04/27/23

Polynomial/graphing question
Given y = x^3 + 10x^2 + 4x + 1, match the points with the appropriate descriptions (-8, 97) (2, 57) (-10/3, 1667/27) A: the function is increasing and convex at this pointB: the function is... more
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04/24/23

Stoichiometry question

what mass of KCl will be produced if 4.5g of Cl2 reacts with K?
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04/23/23

Solve this problem
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04/23/23

If you mix 0.91 L of 0.412 M CuCl2 with 1.92 L of 0.547 M NaOH, how many grams of Cu(OH)2 will you make?
CuCl2 + NaOH --> Cu(OH)2 + NaCl
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04/23/23

Chemistry related question

When equal volumes of 0.1 M solutions of HCI and NaOH are mixed, the total number of ions present will be approximately(A) twice as great as before mixing.(B) the same as before mixing.(C) half as... more
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04/23/23

Chemistry related question

A 1200 mL sample of helium gas is at a pressure of 350 mmH and a temperature of 300 K. What volume will this gas sample occupy if the pressure is increased to 700 mmH and the temperature is... more
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