1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mariana [72]
2 years ago
10

Can anyone help me with these please?

Chemistry
1 answer:
Ksju [112]2 years ago
8 0

Answer:

umm

Explanation:

confusing

You might be interested in
What is the pH of 10.0 mL solution of 0.75 M acetate after adding 5.0 mL of 0.10 M HCl (assume a Ka of acetic acid of 1.78x10-5)
ValentinkaMS [17]

Answer:

5.90

Explanation:

Initial moles of CH3COO- = 10.0/1000 x 0.75 = 0.0075 mol

Moles of HCl added = 5.0/1000 x 0.10 = 0.0005 mol

CH3COO- + HCl => CH3COOH + Cl-

Moles of CH3COO- left = 0.0075 - 0.0005 = 0.007 mol

Moles of CH3COOH formed = moles of HCl added = 0.0005 mol

pH = pKa + log([CH3COO-]/[CH3COOH])

= -log Ka + log(moles of CH3COO-/moles of CH3COOH)

= -log(1.78 x 10^(-5)) + log(0.007/0.0005)

= 5.90

4 0
3 years ago
Read 2 more answers
3 Cu
eduard

Answer: 1.1 moles H2O

Explanation: It looks like the equation is already balanced for you, so the first step will be to convert 144.1 grams of HNO3 to moles. To do this find the molar mass, and use to to do your conversion.Using the numbers provided for mass, this is the equation:1(1.0) + 1(14) + 3(16) = 1 + 14 + 48 = 63 g/mol144.1 g HNO3  x   1 mol HNO3     =  2.287 mol HNO3                              63 g HNO3Now that you know how many moles of HNO3  you're starting with, use the ratio of moles in the equation to find the moles of H2O produced. The coefficient of HNO3 is 8, and H2O is 42.287 mol HNO3  x    4 mol H2O     =  1.144 mol H2O                               8 mol HNO3

4 0
2 years ago
What is the rule for elements with two<br> letters in the symbol?
Mumz [18]

Answer:

In these two-letter symbols, the first letter is always capitalized and the second is always lowercased.

4 0
2 years ago
Read 2 more answers
What is the formula for phosphorus trihydride
Usimov [2.4K]
PH3
Also known as phosphine
4 0
2 years ago
GIVING BRAINLIEST FOR RIGHT ANSWERS PLS HELP
Anuta_ua [19.1K]

Answer:

Answer: Chemical change; Chemical property of heat of combustion

Explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.

Explanation:

4 0
2 years ago
Read 2 more answers
Other questions:
  • A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm. What is the molar mass of the unknown compound?
    7·1 answer
  • Which has more particles, a mole of hydrogen (H) atoms or a mole of<br> oxygen (O) atoms?
    6·2 answers
  • When an athlete gets hurt they apply sometimes an instant cold pack to the injury. the instant cold pack works by mixing two che
    8·2 answers
  • Which best describes the electron behavior in metallic bonding?
    10·1 answer
  • ) carbon + oxygen = _____________
    12·1 answer
  • What is the mass of ethane at STP with a density of 2.1 g/L.
    5·1 answer
  • Does anyone know if this is correct?
    7·1 answer
  • What are those tiny bumps on our tongue?​
    6·2 answers
  • Which statement is TRUE about the following reaction.
    10·1 answer
  • Determine the name for aqueous H2CO3. carbonous acid dihydrogen carbonate carbonic acid hydrocarbonic acid hydrocarbide acid
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!