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Sarah
Each value below represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or neutral.?
[OH-]= 7.0 X 10^-13
[OH-]=3.8 X 10^-6
[H+]= 8.3 X 10^-3
[H+]= 9.6 X 10^-10
1 AnswerChemistry3 years agoPlease help me with this question An unknown metal at 150.0∘C with specific heat 0.36 Jg∘C is placed in 1.4 kg of water at 30.0∘C .?
The final temperature of the water is 37.7∘C . What is the mass of the metal in kilograms?
1 AnswerChemistry3 years agoWhat is the mass in grams of a sample of water when the temperature drops from 75.00∘C to 56.00∘C and 800.0 J of energy are lost?
Answer in 4 significant figures (round
answer to two decimal places).
Use 4.184Jg∘C for the specific heat of water.
Thank you!
2 AnswersChemistry3 years agoThrough electrolysis, a student collects 14.0 grams of hydrogen gas and 112.0 grams of oxygen gas.?
What mass of water (in grams), if it reacted completely, was initially present?
1 AnswerChemistry3 years agoBalanced equation for calcium phosphate in milk?
2 AnswersChemistry3 years agois charcoal a metal or nonmetal?
1 AnswerChemistry3 years agois charcoal an element or compound?
Chemistry3 years agoHow much heat in kilojoules is released by the condensation of 3.5 mol of steam?
Substance: Water
Melting Point Degrees Celsius: 0.0
Boiling Point Degrees Celsius: 100.0 Heat of fusion (cal/g; J/g): 79.7; 333 Heat of Vaporization (cal/g;J/g): 540; 2260
Chemistry3 years ago13. What volume does 76 g of fluorine gas occupy at STP?
1 AnswerChemistry3 years agoCont. Chemistry questions, please help! Received an 11/14 and am unable to figure out which 3 are incorrect! Thank you!!?
8. AN AUTOMOBILE TIRE IS INITIALLY AT 32 PSI (2.17 ATM) AT A TEMPERATURE OF 25 °C. WHAT IS THE PRESSURE AFTER 100 MI OF DRIVING IF THE TIRE’S TEMPERATURE IS NOW 50 °C AND THE TIRE’S VOLUME REMAINS CONSTANT?
a. 3.06 atm
b. 34.7 psi
c. 4.34 atm
d. 64 psi
here, i chose d
9. A SAMPLE OF HELIUM GAS AT 27.0 °C AND 3.60 ATM PRESSURE IS COOLED IN THE SAME CONTAINER TO A TEMPERATURE OF -73.0 °C. WHAT IS THE NEW PRESSURE?
A) 3.12 atm
B) 2.40 atm
C) 5.40 atm
D) 2.38 atm
here, i chose b
10. A sample of helium gas has a volume of 6.50 L at a pressure of 845 mmHg and a temperature of 25 °C. The pressure of the gas, in atmospheres, when the volume is 12.8 L and the temperature is 47 °C is ____.
a. 0.307 atm
b. 0.605 atm
c. 1.06 atm
d. 1.65 atm
here, i chose c
11. A SAMPLE OF METHANE GAS HAS A VOLUME OF 10 L AT A PRESSURE OF 1.5 ATM AND A TEMPERATURE OF 20 °C. WHAT VOLUME DOES THE GAS OCCUPY IF THE PRESSURE IS LOWERED TO 0.9 ATM AT A TEMPERATURE OF 40 °C?
a. 6.4 L
b. 16 L
c. 18 L
d. 33 L
here, i chose d
12. At STP, what is the volume of 4.50 moles of nitrogen gas?
A) 167 L
B) 3420 L
C) 101 L
D) 60.7 L
here, i chose c
13. What volume does 76 g of fluorine gas occupy at STP?
a. 11.2 L b. 22.4 L c. 44.8 L d. 89.6 L
here, i chose b
14. A mixture of three gases, A, B, and C, has a total pressure of 8.5 atm. If the pressure of gas A is 2.4 atm and the pressure of gas B is 1.7 atm, what is the pressure of gas C?
a. 4.4 atm b. 6.1 atm c. 6.8 atm
d. 12.6 atm
here, i chose a
Chemistry3 years ago