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How many grams of Mg(NO3)2 (MM = 148.33 g/mol) would it take to lower the freezing...
10. Please help is due in 30 mins, will rate, Thank you! How many grams of...
10. Please help is due in 30 mins,
will rate, Thank you!
How many grams of Mg(NO3)2 (MM = 148.33 g/mol) would it take to lower the freezing point of (4.60x10^2) grams of water by 4.00°C? The freezing point depression constant of water is Kf = 1.86°C/m.
At an unknown temperature a solution made of (5.180x10^0) g of a non-volatile solute dissolved in...
At an unknown temperature a solution made of (5.180x10^0) g of a non-volatile solute dissolved in 100.0 g of water has a vapor pressure of (5.54x10^1) mm Hg. What is the vapor pressure of pure water (in mm Hg) at this unknown temperature? The molar mass of the solute is (4.620x10^1) g/mol. Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is...
Question 3 (2 points) Based on the thermochemical equation 2 C4H10 + 13 02 → 8...
Question 3 (2 points) Based on the thermochemical equation 2 C4H10 + 13 02 → 8 CO2 + 10 H20 AH - -5316 kJ, how many grams of C4H10 (MM = 58.14 g/mol) would have to react in order to release (7.44x10^4) kJ of heat? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest...
1h. A certain pure solvent freezes at 39.8°C and has a freezing point depression constant Kf...
1h. A certain pure solvent freezes at 39.8°C and has a freezing point depression constant Kf = 0.777°C/m. What is the predicted freezing point (in °C) of a solution made from this solvent that is (1.90x10^0) m in a non-electrolyte solute? 1i. When (8.23x10^1) g of a non-electrolyte is dissolved in (5.2600x10^2) g of a solvent (with Kb = 0.416°C/m) the boiling point of the solution is 1.50°C higher than the boiling point of the pure solvent. What is the...
When (8.61x10^1) g of a non-electrolyte is dissolved in (5.3100x10^2) g of a solvent (with Kb...
When (8.61x10^1) g of a non-electrolyte is dissolved in (5.3100x10^2) g of a solvent (with Kb = 0.416°C/m) the boiling point of the solution is 1.50°C higher than the boiling point of the pure solvent. What is the molar mass (in g/mol) of the non- electrolyte solute? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to...
How many moles of fluorine atoms are there in (3.20x1042) grams of SF4? Give your answer...
How many moles of fluorine atoms are there in (3.20x1042) grams of SF4? Give your answer in scientific notation with 3 significant figures. Do not put your answer. Remember, in scientific notation you must include an exponent, even if that exponent is zero. any units in Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Question 1 (2 points) Based on the thermochemical equation 2 C4H10 + 13 O2 8 CO2...
Question 1 (2 points) Based on the thermochemical equation 2 C4H10 + 13 O2 8 CO2 + 10 H20 AH = -5316 kJ, if (7.47x10^1) g of C4H10 (MM = 58.14 g/mol) reacted with excess oxygen, how many kJ of heat would be released? NOTE: The word "released" means that NO NEGATIVE SIGN IS NEEDED in your answer. Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any...
An aqueous solution has a mole fraction of solute of (3.660x10^-2). The density of the solution...
An aqueous solution has a mole fraction of solute of (3.660x10^-2). The density of the solution is (1.20x10^0) g/mL and the solute has a molar mass of (8.3800x10^1) g/mol. What is the Molarity of solute of this solution? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Question 4 (1 point) Determine how long (in s) it will take an electron to traverse a (3.95x10A1)...
Question 4 (1 point) Determine how long (in s) it will take an electron to traverse a (3.95x10A1) mm length of crystal at room temperature The electron mobility of the material is (3.620x10-1) m2/V-s, and the magnitude of the electric field is (1.2826x10A3) V/m. Use scientific notation, significant figures in answer: 3 Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Question 4 (1 point) Determine how long (in s) it will...
Question 1 (2 points) ✓ Saved The heat capacity of a metal is 0.45 J/g °C....
Question 1 (2 points) ✓ Saved The heat capacity of a metal is 0.45 J/g °C. How many Joules of heat would it take to raise the temperature of (4.9400x10^1) g of this metal from (5.69x10^1) to 95°C? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculation. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: Jxzo o Answer
10. Please help is due in 30 mins,
will rate, Thank you!
How many grams of Mg(NO3)2 (MM = 148.33 g/mol) would it take to lower the freezing point of (4.60x10^2) grams of water by 4.00°C? The freezing point depression constant of water is Kf = 1.86°C/m.
At an unknown temperature a solution made of (5.180x10^0) g of a non-volatile solute dissolved in 100.0 g of water has a vapor pressure of (5.54x10^1) mm Hg. What is the vapor pressure of pure water (in mm Hg) at this unknown temperature? The molar mass of the solute is (4.620x10^1) g/mol. Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is...
Question 3 (2 points) Based on the thermochemical equation 2 C4H10 + 13 02 → 8 CO2 + 10 H20 AH - -5316 kJ, how many grams of C4H10 (MM = 58.14 g/mol) would have to react in order to release (7.44x10^4) kJ of heat? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest...
When (8.61x10^1) g of a non-electrolyte is dissolved in (5.3100x10^2) g of a solvent (with Kb = 0.416°C/m) the boiling point of the solution is 1.50°C higher than the boiling point of the pure solvent. What is the molar mass (in g/mol) of the non- electrolyte solute? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to...
How many moles of fluorine atoms are there in (3.20x1042) grams of SF4? Give your answer in scientific notation with 3 significant figures. Do not put your answer. Remember, in scientific notation you must include an exponent, even if that exponent is zero. any units in Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Question 1 (2 points) Based on the thermochemical equation 2 C4H10 + 13 O2 8 CO2 + 10 H20 AH = -5316 kJ, if (7.47x10^1) g of C4H10 (MM = 58.14 g/mol) reacted with excess oxygen, how many kJ of heat would be released? NOTE: The word "released" means that NO NEGATIVE SIGN IS NEEDED in your answer. Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any...
An aqueous solution has a mole fraction of solute of (3.660x10^-2). The density of the solution is (1.20x10^0) g/mL and the solute has a molar mass of (8.3800x10^1) g/mol. What is the Molarity of solute of this solution? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Question 4 (1 point) Determine how long (in s) it will take an electron to traverse a (3.95x10A1) mm length of crystal at room temperature The electron mobility of the material is (3.620x10-1) m2/V-s, and the magnitude of the electric field is (1.2826x10A3) V/m. Use scientific notation, significant figures in answer: 3 Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Question 4 (1 point) Determine how long (in s) it will...
Question 1 (2 points) ✓ Saved The heat capacity of a metal is 0.45 J/g °C. How many Joules of heat would it take to raise the temperature of (4.9400x10^1) g of this metal from (5.69x10^1) to 95°C? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculation. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: Jxzo o Answer
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