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
enot [183]
4 years ago
12

Please help a student out

Chemistry
1 answer:
e-lub [12.9K]4 years ago
8 0

Answer:

9. B

10. A

I hope this really helps you out

You might be interested in
Two LIKE charges (+ and +, or - and -) will move __________________ each other ???
mel-nik [20]

Answer:

+and+

Explanation:

positive is helps to the right and wrong way

5 0
3 years ago
Which word describes AH for exothermic reactions?<br> O negative<br> O small<br> positive<br> O zero
Leokris [45]

Answer:

negative

Explanation:

Exothermic reaction - energy is out of system, so energy of system becomes smaller, and ΔH<0.

7 0
3 years ago
What process uses analysis of the decay of atomic particles to determine exact age?
padilas [110]

Answer:

Radioactive dating

Explanation:

Radioactive dating measures the ratio of C¹²(normal) and C¹⁴ (radioactive) in fossils to determine the exact age of the specimen. C¹⁴ is unstable and has a half life of 5730 years, so as the organism ages the amount of C¹⁴ diminishes but the amount of C¹² remains constant. The ratio of C¹⁴ to C¹² is used to analyze the decay of atomic particles to determine exact age.

4 0
3 years ago
Read 2 more answers
Iron (ll) and Oxygen formula and correct name.
VikaD [51]

iron is called Fe amd oxygen is called O

8 0
3 years ago
Read 2 more answers
How many molecules of Iron(II)oxide are present in 35.2*10^-23 g of Iron (II)oxide?
slava [35]

Answer:

R.F.M of Iron (II) oxide :

{ \tt{ = (56 \times 2) + (16 \times 3)}} \\  = 160 \: g

Moles :

{ \tt{ \frac{35.2 \times  {10}^{ - 23} }{160} }} \\  = 2.2 \times  {10}^{ - 24}  \: moles

Molecules :

{ \tt{ = 2.2 \times  {10}^{ - 24}  \times 6.02 \times  {10}^{23} }} \\  = 1.3244 \: molecules

4 0
3 years ago
Other questions:
  • A(n)<br> wave carries energy through matter
    9·2 answers
  • Sodium salicylate is made from carbons dioxide and sodium phenoxide. Identify each of these substances as a reactant or a produc
    9·1 answer
  • The amount of time it takes for half of a radioactive isotope to decay is known as the
    11·1 answer
  • Question 1:
    8·1 answer
  • The osmotic pressure of a solution formed by dissolving 0.231 g of the protein in 150 mL of water at 298 K is found to be 2.054
    8·1 answer
  • Is na2o a element or compound
    15·2 answers
  • The smallest particle an element can be divided into is the A electron B neutron C isotope D atom
    11·2 answers
  • Queston
    12·1 answer
  • Help asap !! Awarding 100 points
    15·1 answer
  • Given what you observe at the molecular/atomic level, why would surface area have this effect?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!