09/04/23

Percentage Purity of magnesium oxide

1.10 g of impure magnesium oxide (MgO) was dissolved in 25.0 mL of 3.20 mol L–1 hydrochloric acid. The resulting solution was diluted to 250 mL in a volumetric flask. 20.0 mL of this diluted... more
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09/04/23

Arrange the values according to magnitude.
Arrange the values according to magnitude.Write Greatest to least 58000, 1.0 x 10^5 , 4.3 x 10^-2, 9.0 x 10^-6, 8.1 x 10^-6
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09/04/23

volume to mL and total mass to grams
An empty beaker weighs 39.65 g.When completely filled with water, the beaker and its contents have a total mass of 420.85 g. What volume does the beaker hold? Use 𝑑=1.00 g/mL as the density... more
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08/26/23

Match the terms fact, law, hypothesis, and theory with their definitions. (Hypothesis, fact, theory)
A generalization that concisely summarizes information about natural phenomena A tentative model or picture that offers an explanation for the behavior of a reactionA tentative model that has been... more
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08/24/23

If A=2q^2 +10 and B=2q-10, find an expression that equals A+2B in standard form
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08/24/23

Calculate the boiling point of the solution
A certain liquid X has a normal boiling point of 129.00°C and a boiling point elevation constant Kb = 0.54·°C·kgmol-1.Calculate the boiling point of a solution made of 0.20 kg of iron(III) nitrate... more
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08/24/23

Calculate the molar mass of the protein
488 mg of an unknown protein are dissolved in enough solvent to make 5.00mL of solution. The osmotic pressure of this solution is measured to be 0.107atmat 25.0°C.Calculate the molar mass of the... more
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08/23/23

An experiment is performed on an unknown material and produces the given heat curve. The temperature of the material is shown as a function of heat added.
In the table, 𝑇1=48.2 °C, 𝐸1=173 J, 𝐸2=819 J, 𝐸3=1430 J, and 𝐸4=2870 J.Other experiments determine that the material has a temperature of fusion of 𝑇fusion=235 °C and a temperature of vaporization... more
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08/22/23

Solve by factoring trinomials: x^2+5x=6
Have to zero out the 6. Please explain all the steps. There can be 2 answers
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08/22/23

Solve by factoring trinomials: 2x^2-18x-70=2
Have to zero out the 2. Please explain all the steps. There can be 2 answers
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08/22/23

Solve by factoring (no "c" term-GCF): -2x^2+6x=0
Please explain each step. There can be 2 answers.
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08/21/23

Put the word politics in a sentence

Put the word politics in a sentence that shows you understand no quotes are allowed to be used
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08/20/23

What values do x and y have if |x| = 16, and when x and y are combined they equal 0?
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08/20/23

For the function, identify the holes, intercepts, and horizontal asymptote. Then sketch the graph.
f(x)=(x^2 +4x)/(-3x^3 3x^2 +18x)
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08/14/23

2 numder that add 30 subtract

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07/13/23

Direct and inverse proportions

The force of attraction between two magnets is inversely proportional to the square of the distance between them. When the magnets are rcm apart, the force of attraction between them is F newtons... more
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04/20/20

The length of a rectangle is 3 cm less than twice the width. If the area of the rectangle is 54 cm2, what is the width of the rectangle?
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04/20/20

Can someone help me pleaseeeee !! Let f(x)=4x√−2x for x>0. Find the open intervals on which f is increasing (decreasing). Then determine the x-coordinates of all relative maxima (minima).
Let f(x)=4x√−2x for x>0. Find the open intervals on which f is increasing (decreasing). Then determine the x-coordinates of all relative maxima (minima). 1.   f is increasing on the... more
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04/19/20

How many molecules are there in 3.00 moles of glucose, C6H12O6
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10/24/19

the sum of 7 times a number and 4 is equal to 5
isksjsjjsdhhefbdhfhed just math
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