Search 73,010 tutors

# Word Problems

I am stumped...   Anne and Nancy use a metal alloy that is 18.3% copper to make jewelry. How many ounces of a 15% alloy must be mixed with a 24% alloy to form 90 ounces of the desired...

# Identify Unknown Solutions

You have been prepping for a chem. lab and the safety officer has discovered some mysterious white solid on the floor of the corridor outside of the lab. She has asked you if you could...

# what is the frequency of an electromagnetic wave that has a wavelength of 72.6

Working on electeomagnetic wavelengths in class. This is so confusing....... My teacher explained it to a point, but im still not understanding. Help me please!!!

# How can we calculate volume for this question of titration? (Chemistry )

What volume of 0.2535 M NaOH required to titrate 0.8508 g of KHP to stoichiometric end point?

# Calculate Mols

Calculate the number of mols( aka formula units or molecules) of AgClO3 in a 0.555 gram sample.

# Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 8.30 MJ of energy (in the form of heat)

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 8.30 MJ of energy (in the form of heat) if the temperature of the sodium is not...

# Finding molal freezing point

A solution prepared by dissolving 3.00g of ascorbic acid (vitamin C, C6H8O6 ) in 50.0g of acetic acid has a freezing point that is depressed by ΔT = 1.33°C below that of pure acetic acid. Part...

# Finding freezing point

What is the freezing point in °C of a solution prepared by dissolving 4.00g of MgCl2 in 110 g of water? The value of Kf for water is 1.86 (°C⋅kg)/mol, and the van't Hoff factor for MgCl2 is i = 2...

# how much energy is required to change 78 grams of ice at 0 degrees celsius to steam at 165 degrees celsius

theres is no further desricptions to my problem

# How do u convert between the metric system and the english system

Converting 4.92in to mm

# 1 kg of ice at -10c is converted to 1 kg of steam at 600f. what is the total number of joules needed to do so?

1 kg of ice at -10c is converted to 1 kg of steam at 600f. what is the total number of joules needed to do so?

# 400 g of steem at 400c is cooled to ice at 0c. howmany joules of heat must be lost to achive this change

400 g of steem at 400c is cooled to ice at 0c. howmany joules of heat must be lost to achive this change

# you have a block of material that measures 2.5cm x 3.5cmx 10.7cm and hasd a density of 10.68g/cm. the block has a density of 10.68g/cm. the block has a specific

you have a block of material that measures 2.5cm x 3.5cmx 10.7cm and hasd a density of 10.68g/cm. the block has a density of 10.68g/cm. the block has a specific heat of 0.222cal/gc and is heated from...

# you are given 1.0MHCl 65.1 liters of it + an unknown mixture of NaCHO3 and NaCl= CO2 which is .802g+H2O+NaCl how do you solve for the ratio of NaCl and NaCHO3

you are given 1.0MHCl 65.1 liters of it + an unknown mixture of NaCHO3 and NaCl= CO2 which is .802g+H2O+NaCl how do you solve for the ratio of NaCl and NaCHO3 in the unknow mixture the...

# Chemistry lab question spectroscopy percent brass in copper

my lab: Percent Copper in Brass by using spectroscopy I have Copper(II) nitrate solution Copper(II) sulfate solution Iron(III) nitrate solution Iron(III) chloride solution Zinc...

# Chemistry lab question:

my lab: Percent Copper in Brass by using spectroscopy I have Copper(II) nitrate solution            Copper(II) sulfate solution        ...

# chemistry find mass

i am so confused why i find two different answers while i did in two different ways!   I have 60ml 1M HCL    The question asks me to find the mass of HCl.   1...

# the physical and chemical properties of elements should be most similar within the same?

a. period   b. group   c. quantum level   d. oxidation state     I figured it would was b. group

# the physical and chemical properties of elements should be most similar within the same?

a. period   b. group   c. quantum level   d. oxidation state     I figured it would was b. group

# what particle has a mass of approximately one atomic mass unit?

a. proton   b. electron   c. carbon-12 nucleus   d. oxygen-16 nucleus