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
VMariaS [17]
4 years ago
11

Help!! I need help on these! Please show all work! Will give extra points!

Chemistry
1 answer:
alukav5142 [94]4 years ago
7 0

Answer:

20 times 10 to the third is 77 and a half

You might be interested in
A sample of gas is held at constant volume. If the number of moles of this sample of gas is doubled and the pressure of this sam
FrozenT [24]

Answer:

<em>number of moles of gas increases the volume also increases.</em>

5 0
3 years ago
If a graduated cylinder has 28ml of water in it and you add an object which causes the water level to rise to 47ml, what is the
grin007 [14]

Answer:

The object placed in the water has a volume of 19 cm³

Explanation:

<u>Step 1: </u>Data given

volume of the cylinder before adding the object = 28 mL = 28 cm³

After adding an object with volume X the volume rises to 47 mL = 47 cm³

<u>Step 2:</u> Calculate the volume of the object

Volume of the object = Final volume - initial volume

Volume of the object = 47 cm³ (or 47 mL) - 28 cm³ ( or 28 mL) = 19 cm³ (or 19 mL)

The object placed in the water has a volume of 19 cm³

7 0
3 years ago
Write a balanced formation equation at standard conditions for the compound HCN.
Aloiza [94]
The formation of hydrogen cyanide, HCN is formed by reacting hydrogen gas, carbon and nitrogen gas, expressed in the following expression below:

<span>½ H2 (g) + C (s) + ½ N2 (g) → HCN (g) ΔHof = 135 kJ
</span>
At standard conditions, hydrogen and nitrogen exist as gases while carbon is solid. This is also an endothermic reaction due to the positive <span>ΔHof</span>
7 0
3 years ago
Read 2 more answers
What is the nervous system?
malfutka [58]

Answer:The nervous system or the neural system is a complex network of neurons specialized to carry messages. The complexity of the nervous system increases as we move towards higher animals.

Explanation:

7 0
3 years ago
Read 2 more answers
Which hypothesis regarding the origin of life on Earth suggests that oxidation-reduction (redox) reactions may be responsible fo
telo118 [61]

The hypothesis that suggests that redox reaction is responsible for the formation of complex organic molecules is :

  • Reducing Atmosphere Hypothesis

<h3>Reducing atmosphere</h3>

Reducing atmosphere hypothesis states that a reducing atmosphere is a condition whereby the atmosphere has an abundance of negative charges which leads to reducing reaction by the additon of electrons to compounds.

The addition of electrons to the compounds leads to the formation of complex organic molecules. some examples of reducing gases are :

  • Hydrogen and
  • Carbon monoxide

Hence we can conclude that The hypothesis that suggests that redox reaction is responsible for the formation of complex organic molecules is : Reducing Atmosphere Hypothesis.

Learn more about reducing atmosphere : brainly.com/question/3553382

3 0
2 years ago
Other questions:
  • Metals show a wide range of chemical behavior. Give examples of that variation by describing some common properties of calcium,
    13·2 answers
  • Lipids that are liquid at room temperature are called oils <br> a. True <br> b. False
    11·1 answer
  • 11.select the correct description for the atoms below​
    7·1 answer
  • In general, atmospheric pressure is greatest near Earth's surface and ____ as you move upward away from sea level.
    14·1 answer
  • Which of the following is the best trend line for a set of data points? (SCIENCE QUESTION)
    10·2 answers
  • What is the molarity of a solution that contains 4 mols of sugar in 4 liter of solution?
    8·1 answer
  • Write an equation for the proton transfer reaction that occurs when the following acid reacts with water. Draw curved arrows tha
    8·1 answer
  • What do minerals feel like
    11·1 answer
  • When heated, calcium carbonate decomposes according to the equation given below:
    12·1 answer
  • Figure 2 represents part of the structure of graphite.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!