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
muminat
3 years ago
12

What is formed when atoms of different elements combined.

Chemistry
1 answer:
ki77a [65]3 years ago
6 0

Answer:A molecule is formed when two or more atoms join together chemically.

Explanation:

You might be interested in
PLEASE HELP ASAP! What part of the atom determines physical properties? A. Neutron B. Proton C. Nucleus D. Electron
Arisa [49]
I believe it is the nucleus
4 0
3 years ago
How many moles of potassium are contained in 449 g of<br> potassium?<br> pls help im so lost
e-lub [12.9K]

Answer:

449 (g K) / 39.1 (g/mol K) = 11.5 mol K

Explanation:

Potassium has atomic number 39.1

amount of K in 449g sample = 449/39.1 = 11.5 mol

4 0
3 years ago
Read 2 more answers
What kind of charge does a neutron have?
Nat2105 [25]
Neutrons actually don't carry an electrical charge, which is why they are called neutrons because they are "Neutral".


6 0
3 years ago
A sample of food containing 27 g of fat, 48 g of carbohydrates and 20 g of protein is burned in a bomb calorimeter. In a perfect
rosijanka [135]

Answer:

38.3958 °C  

Explanation:

As,

1 gram of carbohydrates on burning gives 4 kilocalories  of energy

1 gram of protein on burning gives 4 kilocalories  of energy

1 gram of fat on burning gives 9 kilocalories of energy

Thus,

27 g of fat on burning gives 9*27 = 243 kilocalories of energy

20 g of protein on burning gives 4*20 = 80 kilocalories  of energy

48 gram of carbohydrates on burning gives 4*48 = 192 kilocalories  of energy

Total energy = 515 kilocalories

Using,

Q=m_{water}\times C_{water}\times (T_f-T_i)

Given: Volume of water = 23 L = 23×10⁻³ m³

Density=\frac{Mass}{Volume}  

Density of water= 1000 kg/m³

So, mass of the water:  

Mass\ of\ water=Density \times {Volume\ of\ water}  

Mass\ of\ water=1000 kg/m^3 \times {0.023\ m^3}  

Mass of water  = 23 kg

Initial temperature = 16°C  

Specific heat of water = 0.9998 kcal/kg°C  

515=23\times 0.9998\times (T_f-16)

Solving for final temperature as:

<u>Final temperature = 38.3958 °C  </u>

8 0
3 years ago
Here's a one-batch sample of Just Lemons lemonade production. Determine the percent yield and amount of leftover ingredients for
Bumek [7]

the percent yield is 95% and the excess ingredients are sugar and water but i don't know the amounts. pls let me know if you do :(

4 0
3 years ago
Other questions:
  • Curd is not kept in copper and brass , why?
    10·1 answer
  • Which scientist was the first to propose that atomic structure contains electrons?
    6·1 answer
  • help asap What type of cell does the cheek cell represent, plant cell or animal cell? What did you see that let you know?
    14·1 answer
  • Ichthyothereol is isolated from the leaves of Ichthyothere terminalis. It is so toxic to fish that they will jump out of the wat
    8·1 answer
  • “While observing a chemical reaction, how can you tell which reactant is limiting?”
    14·1 answer
  • Write these numbers rounded to the three nearest significant figures
    9·1 answer
  • In an effort to try winning World War I, many countries broke previously created treaties and pacts that banned the use of chemi
    15·1 answer
  • READING CHECK
    9·1 answer
  • How much did the total amount of discarded clothing and other fabrics increase from 1960
    6·1 answer
  • Which of the following giant covalent structures is a good conductor of electricity?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!