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
Studentka2010 [4]
3 years ago
7

Can someone please help me please?

Chemistry
2 answers:
vekshin13 years ago
7 0

Answer:

The sum of the molar masses of each isotope of the element.

Ludmilka [50]3 years ago
6 0

Answer:

The average atomic mass (sometimes called atomic weight) of an element is the weighted average mass of the atoms in a naturally occurring sample of the element.

Explanation:

You might be interested in
Why can't chemical changes be undone? Because of the chemical properties. Because Mark is an idiot. Because they need energy. Be
Volgvan

Answer: Because new substances are formed.

Explanation: A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.  Once a chemical change occurs it cannot be undone due to the change in chemical identity.  The creation of a new substance is not reversible.  

8 0
3 years ago
Two of the simplest compounds containing just carbon and hydrogen are methane and ethane. Methane contains 0.3357 g of hydrogen
Natasha_Volkova [10]
Let the ratio of grams of hydrogen per gram of carbon in methane be M, we know that:
M = 0.3357 g / 1 g

Next, lets represent the grams of hydrogen per gram of carbon in ethane be E. The final piece of information we have is:

M / E = 4/3

If we cross multiply,

3M = 4E

Now, substituting the value of M from earlier and solving for E,

E = (3 * 0.3357) / 4
E = 0.2518

There are 0.2518 grams of hydrogen per gram of carbon in ethane.
5 0
3 years ago
Which element does not have similar chemical characteristics as phosphorus (P)?
Trava [24]
Generally (but far from universally), the elements within a group have similar characteristics. Antimony, nitrogen, and arsenic are all part of the same group as phosphorous (the pnictogens, or group 5A). Oxygen is not in this group, but rather in an adjacent group (the chalcogens, or group 6A). Thus, the answer here should be oxygen.

That said, there can be very significant differences in characteristics among the elements within a group, and that is certainly the case here. For example, free nitrogen exists predominantly as a molecular gas (N₂) and makes up about 78% of the atmosphere we breathe. Elemental arsenic (As), while in the same group as nitrogen, is naturally found in the solid state and is poisonous to humans (arsenic is sometimes included among the toxic heavy metals, although it’s technically a metalloid).
3 0
3 years ago
The name of an alkyl group that contains THREE carbon atoms is____
tester [92]

Answer:

The answer is "Propyl"

Explanation:

5 0
3 years ago
Ok so I have 3 beakers of clear liquid each holding a different substance, Water, Magnesium Sulphate and Sodium Carbonate how ca
nataly862011 [7]
For water you could add oil..ex: cooking oil separates form water because water is heavier than oil.

For Magnesium Sulfate you could add Sodium Carbonate..ex: Sodium Carb reacts to Mg Sulfate adding a darker hue to the liquid and adding a lot of bubbles.

For Sodium Carbonate you could add Sulfuric Acid..ex: Sulfuric Acid would add a reaction to the Sodium Carb that would resembling water boiling 

H0P3 It H3LPS :)
7 0
3 years ago
Other questions:
  • Why is salt put on icy roads and sidewalks in the winter?
    14·1 answer
  • Consider the oxidation of sodium metal to sodium oxide described by the balanced equation: 4 na + o2 ? 2 na2o. if 2.55 mol of so
    13·1 answer
  • Some people consider the earth to be _____ because of its dynamic processes or cycles.
    7·2 answers
  • Some help with these would be much appreciated
    12·1 answer
  • you drop a marble ball into a glass filled with water, which results ib 3.75 mL of water being displaced (spilled out). given th
    8·1 answer
  • According to the kinetic theory, what is the kinetic energy of a gas molecule proportional to?
    11·1 answer
  • Question 5: Causes of Molecular Shape (3 points)
    7·1 answer
  • How do slab pull forces affect plate motion? Choose the correct answer.
    11·1 answer
  • An empirical formula shows the actual number of atoms of each element in a compound.
    14·1 answer
  • An unknown substance has a density of 4G/CM three and a volume of 25 CM three. What is its mass in grams
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!