03/07/21

What volume of oxygen gas is produced when 70.7 g of mercury(II) oxide reacts completely according to the following reaction at 25 °C and 1 atm? mercury(II) oxide (s) mercury (l) + oxygen(g)
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03/07/21

Math Problem x6
The sum of the ages of Wyatt and Natalie is 52 years. 8 years ago, Wyatt's age was 2 times Natalie's age. How old is Wyatt now?
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03/07/21

Math Question 1
Kristina left the college traveling 16 mph. Then, 3 hours later, Maggie left traveling the same direction at 28 mph. How long until Maggie catches up with Kristina?
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03/07/21

if one numbers is 6 and the geometric mean of the two numbers is 4. What is the other number?
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03/07/21

Reaction or main idea
Q. Post one main idea or reaction and explain in detail why you chose that specific part to share.There's been a lot of discussion about a recent statistic that in 2004, 25950,000 engineers... more
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03/07/21

Is an article needed before the words "fat oaf" in the sentence below or not?

Hello! Could somebody please help to determine if an article is needed or not in the following sentence in front of the word “fat”? Many thanks in advance!“You won’t ever understand what it means... more
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03/07/21

What is the graph of y = |x +2|+5 ?
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03/07/21

The graph of which equation passes through (10,15) and is perpendicular to the following graph? y = − 5/6 x −2
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03/07/21

General Chemistry

An atom has a diameter of 4.50 Å and the nucleus of that atom has a diameter of 9.00 x 10^-5 A. Determine the fraction of thevolume of the atom that is taken up by the nucleus. Assume the atom and... more
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03/06/21

Please help me with these Chemistry questions.
(a) If I have a substance in the vapor phase at approximately 25 degrees Celsius, how can I change the phase to liquid without changing the temperature? (b) You are driving home late one... more
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03/06/21

Two trains leave towns 855 miles apart at the same time and travel toward each other. One train travels 21 m/h faster than the other. If they meet in 5 hours, what is the rate of each train?
Rate of the faster train mi/h? mi/hRate of the slower train mi/h?mi/h
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03/06/21

Need help with this question
What is the molarity of a solution consisting of 324 g of Yb2(SO4)3 in 2.50 L of solution
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03/06/21

chemistry questions about exothermic or endothermic reaction

A reaction started with 100kJ of potential energy in its reactants, then decreased to 20 kJ of potential energy. Is this an exothermic or endothermic reaction? Explain in terms of changes to... more
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03/06/21

What is the mass, in grams, of 5.56 1023 molecules of aspirin, C9H8O4?
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03/05/21

A cylindrical can containing pieces of fruit is filled to the top with syrup before being sealed.

 A cylindrical can containing pieces of fruit is filled to the top with syrup before being sealed. The base of the can has an area of 35 cm2 , and the height of the can is 5 cm. If 55 cm3 of syrup... more
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03/05/21

What is the specific heat of the substance? 
An unknown substance weighing 34.7 g was heated from 10.2°C to 68.9°C. In this process, the substance absorbed 788 J of energy. What is the specific heat of the substance? 
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03/05/21

please help with these questions?
a)-A population of Wombats is growing at a constant percent rate. If the population on January 1st is 1012 and a year later is 1080, what is its yearly percent growth rate to the nearest tenth of a... more
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03/05/21

please help meeee!!!!
A writer wrote 890 words on the first day, 760 words on the second day and 630 words on the third day, and so on in an arithmetic sequence.How many words did the writer write on day 7?
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03/05/21

please help meeee!!!
What is the 50th term of the sequence below?9, 5, 1, -3, …
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03/05/21

please help meeee!!!
What is the explicit formula for the sequence below?9, 5, 1, -3, …
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03/05/21

Help, I dont know how to correct these problems for my homework.
Given the balanced equation representing a reaction:2 H2(g) + O2(g) → 2 H2O (l)An amount of 6 grams of hydrogen is reacted with 64 grams of oxygen.a. What is the limiting reagent? Justify your... more
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03/04/21

5(x- _) (x+4) = 5x²+_x-60
What do the blanks equal?
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03/04/21

I have a few questions, I'll list in description. Please help.

What pressure will 23 g of a CO exert in a 3.5 L container at 89°C (answer in atmospheres and find moles of CO, divide the mass by the molar mass of 28.01 g/mo)?What is the volume, in L, occupied... more
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03/04/21

Question on math
When you buy​ something, it actually costs more than you may think-at least in terms of how much money you must earn to buy it. For​ example, if you pay ​24% of your income in​ taxes, how much... more
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03/04/21

Redox reactions

CH2O + Ag2O + OH- → 2Ag + HCO2-+ H2O—how many grams of Ag are formed if 2.32 grams of Ag2O are used—If 0.98 grams of Ag are formed what is the yield of the reaction
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