10/02/21

Predict if dilution and volume will increase, decrease or not change the pH
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10/01/21

chemistry question I dont get
Calculate the density of oxygen, O2, under each of the following conditions:STP1.00 bar and 35.0 ∘CExpress your answers numerically in g L−1. Enter the density at STP first and separate your... more
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10/01/21

...An object has a kinetic energy of

An object has a kinetic energy of 83.41 J and a mass of 34.51 kg, how fast is the object moving?
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09/29/21

What is this answer?
A​ once-popular children's doll is slowly declining in popularity. The quartic function f(x)=−0.022x4+0.457x3−2.492x2−5.279x+87.419, where x is the number of years since​ 1993, can be used to... more
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09/26/21

The number of crystals that have formed after t hours is give by f(t) = 20e^0.013t . How long does it take for the number of crystals to triple?
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09/23/21

Match the following statements to the correct answer
An element (or group of atoms) that has fewer electrons than protons. An element (or group of atoms) that has more electrons than protons. The type of bonds that NaOH contain.  In the compound... more
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09/23/21

Dilithium is used to power the Starship Enterprise. If you have 867.5 grams of dilithium (density is 0.534 grams/ml), what size of cube do you have?
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09/19/21

Three apples and four bananas cost $4.85. Three apples and ten bananas cost $8.75. Find the cost of an apple.
For this problem, identify your variables (define), set up a system of equations (2 equations, 2 variables), and then solve the system. State your answer in terms of the problem. Example:The sum of... more
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09/19/21

a) What molecule makes up the majority of 0.020 M LiF (aq)?

(M stands for molarity - moles/L). Hint: no math needed.b) What element makes up the majority of atoms, by mass?
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09/19/21

Precent by Mass
An alloy is 12.2% Copper by mass in Tin. Copper makes up what percent of the atoms in this sample?
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09/18/21

A sample of 7.39 g of liquid 1‑propanol, C3H8O, is combusted with 42.1 g of oxygen gas. Carbon dioxide and water are the products.
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09/18/21

Translate this sentence into an equation 47 is the difference of gorans height and 19
I have to use the variable g to represent gorans height
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09/18/21

How many moles of methane CH4 are needed to produce 4.18 mol of water vapor H2O
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09/18/21

Mixed Gas Question 4

1.If I have 91 liters of gas held at a pressure of 1.6 atm and a temperature of 816 K, how many moles of gas do I have? Answer with correct significant figures and unit spelled out completely.R =... more
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09/18/21

Mixed Gas Question 3
1.The temperature inside my refrigerator is about 4o Celsius. If I place a balloon in my fridge that initially has a temperature of 34 oC and a volume of 0.293 liters, what will be the volume of... more
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09/17/21

Avenue functions
The energy company New York State Electric and Gas charges each residential customer a basic fee for electricity of $16.23, plus 0.0222 per kilowatt hour. Assuming there are 500,000 residential... more
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09/16/21

A chemical fume hood removes vapors and gases while a snorkel provides fresh air.
Would this statement be True or False?
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09/16/21

What is the pH of a solution containing a hydrogen ion concentration of 3.0x10-4M?

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09/16/21

The volume V and the surface area S of a sphere of radius r are given by the formulas V = 4 3 𝜋r3 and S = 4𝜋r2. Express V as a function of S. V(S) =
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09/16/21

What is the mass of hydrate form of compound

Na2CO3 x H20mass of empty crucible 12.7825gmass of crucible + hydrate 13.7861g
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09/15/21

How to find the length and width
A yard has a perimeter of 250 feet. If eight times the length of the yard equals seventeen times the​ width, what are its​ dimensions?
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09/15/21

Given .72 mole of oxygen gas how many mole of water can form

2H-C=CH (g) + 5 O2(g) —> 4 CO2 (g) + 2H2OGiven 0.72 mole of oxygen gas how many mole of water can form?
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09/15/21

A family pool holds 16,000 gallons of water. How many cubic meters is this?

     [ 1gal = 3.785 L, 1mL = 1 cm3]                                                                                                        
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09/15/21

The ages of three friends are consecutive integers. If the sum of the three friends 'age is 45,which equation below can be used to determine the age of the youngest friend ?
A. 3x=4B. 3×+6=45C.3×3=45D. 3×+3=452. Solve the equation 8-8m=8m+56
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09/15/21

Poisonous Gas Case
Investigation Gawain has been poisoned! The victim has been suffering from allergic reactions so his nose has been stuffed up all week while working in lab. Unusual headaches and nauseating feeling... more
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