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
schepotkina [342]
3 years ago
14

Which number represents an acidic pH, 4 or 9?

Chemistry
1 answer:
Leno4ka [110]3 years ago
5 0

Answer:

pH 4 represents an acidic

You might be interested in
In 1993 the Minnesota Department of Health set a health risk limit for chloroform in groundwater of 60.0 g/L Suppose an analytic
tangare [24]

Answer:

4.74 × 10³ mg

Explanation:

Given data

  • Health risk limit for chloroform in groundwater: 60.0 g/L
  • Volume of the sample of groundwater: 79.0 mL = 79.0 × 10⁻³ L

The maximum mass of chloroform that there could be in the sample of groundwater to meet the standards are:

79.0 × 10⁻³ L × 60.0 g/L = 4.74 g

1 gram is equal to 10³ milligrams. Then,

4.74 g × (10³ mg/1 g) = 4.74 × 10³ mg

6 0
3 years ago
Why is it not possible to directly count the number of particles in a mole?
SVETLANKA909090 [29]

Answer: because a mole is based on Avogrado's number,  which is 6.02 x 10²³ particles. It isn't possible to directly count that many particles at a time.

6 0
3 years ago
When thermal energy is added to an object, what happens to the motion of the particles?
Novay_Z [31]
The atoms start vibrating faster
3 0
2 years ago
Hurry please need fast
Nina [5.8K]
I think it might be 2 but I could be mistaken sorry if I am
7 0
2 years ago
ΔH for the reaction below is -826.0 kJ/mol. Calculate the heat change when a 69.03-g sample of iron is reacted.4Fe(s) + 3 O2(g)
Anuta_ua [19.1K]

Answer:

c. -1020.9 kJ

Explanation:

4Fe (s) + 3 O₂ (g) --> 2 Fe₂O₃(s)         ΔH  =  -826.0 kJ/mol.

atomic weight of iron = 56

69.03 g = 69.03 / 56

= 1.23268 moles

Heat released by 1.23268 moles

= 1.23268 x 826.0

= -1020.9 kJ .

4 0
3 years ago
Other questions:
  • James is preparing three solutions of salt water. Each of the solutions has the same amount of water in the beaker and a differe
    13·2 answers
  • In which field(s) is knowledge about how science works important?
    12·2 answers
  • Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds
    5·2 answers
  • How were the Great Lakes formed?
    6·1 answer
  • when a person strikes a match, potential energy in the match is transformed into which types of energy?
    15·2 answers
  • Use the following equation to determine the charge on bromine when it dissociates from sodium and determine whether it is being
    14·2 answers
  • Determine the minimum work required by an air compressor. At the inlet the conditions are 150 kg/min, 125 kPa and 33 °C. At the
    15·1 answer
  • Which of the following properties describe all matter?
    15·2 answers
  • 35
    15·1 answer
  • Please help me...<br> 1. oak<br> 2. catrpiller<br> 3. Blue jay
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!