09/16/20

- The length of a rectangle is 3 inches less than twice the width. (Remember: rectangles have 2 sets of equal sides) Find the length and the width if the perimeter of the rectangle is 24 inches.

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09/16/20

Iron(II) sulfate forms several hydrates with the general formula FeSO4 ·x H2O, where x is an integer. If the hydrate is heated, the water can be driven off, leaving pure FeSO4 behind.
Iron(II) sulfate forms several hydrates with the general formula FeSO4 ·x H2O, where x is an integer. If the hydrate is heated, the water can be driven off, leaving pure FeSO4 behind.Suppose a... more
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09/16/20

Find the equation of a line that passes through (2, -3) and that is parallel to 5x + y= -2
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09/16/20

Quantifying Stains For Science Fair Project
I'm planning on making a science fair topic about which homemade stain remover works best. However, I need a way to quantify the stains. I heard about ImageJ but my Mac doesn't let me download it... more
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09/16/20

Determine the mass of 6.27 ×1023 atoms Cl.
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09/16/20

Give the number of electrons in Na^+1
Group of answer choices A. 12 B. 11 C. 13 D. 10 E. 9
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09/16/20

A gas has a pressure of 312 Pa at 32C.What is its pressure at 43C
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09/15/20

What is the empirical formula for the hydrocarbon?
Complete combustion of  g of a hydrocarbon produced  g of CO2 and  g of H2O. Insert subscripts as necessary.
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09/15/20

Calculate the formula mass of calcium carbonate hexahydrate, CaCO3⋅6H2O , in atomic mass units (amu or u).
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09/15/20

how much sand can be delivered for $100
$0.50 for each cubic foot of sand you buy plus $6.00 to deliver the sand. So the total number of dollars you pay is 0.50 times the number of cubic feet, plus 6. x is the number of cubic feet .how... more
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09/15/20

Dylan and Dusty plan to take weekly surfing lessons together.

Dylan and Dusty plan to take weekly surfing lessons together. If the 2-hour lessons are $20 per person and they plan to spend $200 each on new surfboards, what is the maximum number of lessons the... more
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09/15/20

A town has a population of 14000 and grows at 2.5% every year. What will be the population after 5 years, to the nearest whole number
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09/15/20

Calculate the heat change in kilojoules for melting 5.00 kg of ice at 0 ∘C
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09/15/20

Calculate the heat change in kilocalories for melting 140 g of ice at 0 ∘C
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09/13/20

The students at a school assembly were split into 4 equal groups. There were 63 students in each group. How many students were at the assembly?
Write an equation and solve. (Thanks to whoever helps!)
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09/13/20

In a gas chromatography experiment, a 2.4 x 10-6 L sample of wine is found to contain 3.1 x 10-7 L of ethanol. a. What is the percentage of ethanol (by volume) in the wine?
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09/13/20

Please help me with this!
In a candy bag there are 50 candy cars, white, green and pink. You take two. How many candy cars of the different colors are there if the probability of taking two green cars with return is 0.25... more
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09/13/20

If 50.0 mL of 1.00 M lead(II) nitrate solution reacts with 75.0 mL of 0.500 M potassium iodide solution, determine which reactant is in excess the mass of lead(II) iodide that forms.
Potassium iodide and lead(II) nitrate solutions react together to form a precipitate of lead(II) iodide: 2KI(aq) + Pb(NO3)2(aq) → PbI2(s) + 2KNO3(aq)d) If 50.0 mL of 1.00 M lead(II) nitrate... more
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09/13/20

What is the maximum mass of S8 that can be produced by combining 92.0 g of each reactant? 8SO2+16H2S⟶3S8+16H2O
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09/12/20

I need help solving this problem
A 4.46 g sample of lead oxide was reacting with carbon and 4.14 g of lead was obtained. Calculate the empirical formula of lead oxide.
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09/12/20

algebra problem
Two bees leave two locations 210 meters apart and fly, without stopping, back and forthbetween these two locations of average speeds of 3m/s and 7m/s, respectively. How longis it until the bees... more
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09/12/20

Moles of Protons
What formula do you use to get the answer to this question... How many moles of protons are there in one mole of Li2+?
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09/11/20

If 124 children sign up for a field trip and each vehicle carries x children, which expression could be used to determine the number of vehicles needed for the trip?
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09/11/20

For chemistry HW last problem
If a drug has to be administered at 650 mg per kilogram of body mass, how many mg do you administer to a 350 kg moose?
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09/11/20

Find EF if E is the midpoint of DF, DE = 15-3x and EF = x+3
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