01/31/21

Solid Ammonium Chloride, NH4Cl is formed by the reaction of gaseous ammonia, NH3, and hydrogen chloride, HCL.
NH3(g)+HCl(g)—-> NH4Cl(s)A 5.59 g sample of NH3 gas and a 5.59 sample of HCL gas are mixed in a 1.00 L flask at 25 degrees Celsius. How many grams of NH4Cl will be formed by this reaction?What... more
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01/31/21

Given the two exponential functions f(x)=3.2(1.05)^2x and g(x)=3.1(1.07)^2x
Determine which function grows faster.  Use a graph to support your conclusion in part and sketch both functions. If both graphs represent the population growth of bunnies, compare and contrast... more
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01/30/21

I need help with chemistry
Naturally occurring silver is composed of two isotopes: Ag-107 is 51.35% with a mass of 106.905092 amu, and the rest is Ag-109 with a mass of 108.9044757 amu. Calculate the average atomic mass of... more
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01/30/21

Scientists measured the temperature on planet Xenon over a certain time period and found that it grew according to the exponential function over that time. What was the initial temperature?
I need to find the initial value of these three equationst=500(300)^t-200Options for the first are : a) 0.-16 b)500 c)-200 d) 300t=800(500)^t-600options are: a)200 b)-0.05 c)-600... more
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01/30/21

find the coordinates of the point of intersection of the line

On graph paper draw axes with values of x and y between −3 and 10, and plot the following points: P(4, 0), Q(−2, 9), R(5, 8), S(−1, −2) Hence find the coordinates of the point of intersection of... more
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01/30/21

Modified True or False: the process depends on the fact that living things contain a known amount of radioactive 14C, which has a half - life of 7730 years.
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01/30/21

Calculate the mass of methane (in grams) required to bring to boil 750ml of water at an initial temperature of 15C. Assume that 65% of the energy produced by the methane is used to heat the water.
Calculate the mass of methane (in grams) required to bring to boil 750ml of water at an initial temperature of 15C. Assume that 65% of the energy produced by the methane is used to heat the water.
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01/30/21

How to find moles titrated
These are the two questions in my lab:3. How many moles of Fe2+ ions and MnO4 – ions were titrated in each Part 1 trial? 4. How many moles of oxalic acid, H2C2O4 were titrated in each Part 2... more
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01/29/21

What percent of 132 is 80?
What percent of 132 is 80?
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01/29/21

A town had a population of 65,000 in 2000.

15. A town had a population of 65,000 in 2000. Then the population increased by 2.5% each year for the next 5 years. a. Write a function that models the population over time since the year 2000. b.... more
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01/29/21

Solve the system of linear equations by graphing. 3y+4x=3 And x+3y=−6
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01/29/21

Write molecular formulas for the two alkanes 1. CH3-CH2-Ch2-Ch2-Ch2-Ch2-CH3.) 2. CH3-CH2- CH2 -CH2 -CH2 -Ch2 -CH2- CH2 -CH3
CH3-CH2-Ch2-Ch2-Ch2-Ch2-CH3 CH3-CH2- CH2 -CH2 -CH2 -Ch2 -CH2- CH2 -CH3
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01/29/21

How many grams of MgCl2 can be produced from 5 grams of Mg?
Based on the equation Mg + 2HCl  → MgCl2 + H2
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01/29/21

Balancing Practice
Balance the following equation (use the number one when necessary - don't leave blank):___FeO(s)+   ___O2(g)  ---> ___Fe2O3(s)
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01/28/21

3 moles of HCl=?? Molecules of H2
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01/28/21

5.00 g of Al=?? g of AlCl₃
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01/28/21

A sequence is defined using tule an=3an-1+n with a1=4. Find the value of a4-a3
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01/28/21

Real-World Math problem
Anthony Valencia sold his used mountain bike and his friend's accessories to a bicycle store for a total of $220. The store told Anthony that they paid him four times as much money for the bike as... more
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01/28/21

Predict and balance the equation WITH THE STATES: FeSO4 (aq) +KCl (aq) = ?. Then give the complete ionic equation along with the net ionic equation. Then give the spectator ions.

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01/28/21

the question was too long so its in the description
The profit of a designer bag company is represented by the function y=-2x^2+100x+60 , where x represents the cost of the designer bag. What price should the company charge per bag to maximize its... more
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01/28/21

You plant a spruce tree that grows 4 inches per year and a hemlock tree that grows 6 inches per year. The initial heights are shown.

A.Write a system of linear equations that represents the stituation.B.Solve the system by any method. Interpret your solution.
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01/28/21

Population Density and Area
Which has more people, Country A with an area of 98 miles2 and a population density of 49 people/kilometers2 , or Country B with an area of 49 kilometers2 and a population density of 98 people/miles2? more
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01/27/21

A cylindrical tube 10.9 cm high and 2.20 cm in diameter is used to collect blood samples. How many cubic decimeters (dm3) of blood can it hold (V of a cylinder = πr2h)?

Answer in the correct number of significant figures.
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01/27/21

The sum of two numbers is 10, and twice their difference is 4. Find the two numbers by graphing.
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01/27/21

To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of the ice cube is 12.4 g, and its initial temperature is −11.6 ∘C.

The water resulting from the melted ice reaches the temperature of his skin, 32.0 ∘C. How much heat is absorbed by the ice cube and resulting water? Assume that all of the water remains in the... more
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