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
ira [324]
4 years ago
15

Why do we need energy and list three type of energy

Chemistry
1 answer:
Neporo4naja [7]4 years ago
3 0

Answer:

Energy is something very important to people. It helps to light our homes, dry our clothes, and even cook our food. If we didn't have energy I don't know where we'd be. Three types of energy are: Solar Energy, Wind Energy, and Hydro Energy.

You might be interested in
Which of the following could be the molecular formula for an alkane?
kicyunya [14]
Your answer would be C9H16
8 0
4 years ago
What is the mass, in grams, of 1.33 mol of water, H2O?
Len [333]

Answer:

24.0g H2O

Explanation:

1.33 mol (18.016g/1 mol) = 24.0g H2O

8 0
4 years ago
Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. The sample is spotted on a TLC plate
Citrus2011 [14]

Answer:Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. The sample is spotted on a TLC ... Predict the relative Rf values for the three components in the sample. Hint: See Table 19.3. ... The sample is spotted on a TLC plate and developed in solvent mixture. We are going to predict the ...

Explanation:MORE POWER

4 0
3 years ago
What mass of magnesium chloride is needed to make 100.0 mL of a solution that is 0.500 M in chloride ion?
miss Akunina [59]
M = n/V

.5M = n/.100 L

n = .1 L * .5M

n= .05 mols of MgCl2

mass of MgCl2 = .05 mols of MgCl2 * 95.211 grams/ 1 mol of MgCl2 

mass of MgCl2 = 4.76 grams

4.76 grams of MgCl2 is needed to make 100 ml of a solution that is .500M, in chloride ion. Bolded = confused
3 0
4 years ago
Please help help helpppppppp
Leviafan [203]
1. Magnesium atoms also have a slightly smaller radius than sodium atoms, and so the delocalised electrons are closer to the nuclei.
2. Sodium has higher melting point than potassium because of stronger metallic bonding .
3. Potassium are very soft metal can be very easily cut with a knife
4. Increase of resistance in metals. Therefore the mobility of electrons decreases and causes decrease in conductivity.
5.To increase strength, increase corrosion resistance, or reduce costs.
6. All metals have low ionization energies and are relatively electropositive, and so they lose electrons fairly easily.
7. All the group 1 metals are reactive, but they get more reactive as you go down the group, so potassium is more reactive than sodium.
5 0
3 years ago
Other questions:
  • Example when materials are prepared as fluids so they can be moved more easily
    6·2 answers
  • A buffer is prepared by adding 100 mL of 0.50 M sodium hydroxide to 100 mL of 0.75 M propanoic acid. Is this a buffer solution,
    9·1 answer
  • I need to clean the Kwik Switch thermometer between<br>each measurement.<br>O<br>True<br>False<br>​
    8·2 answers
  • A student is studying asbestos, a mineral that causes cancer in humans. One of the components of asbestos is silicon, a somewhat
    13·1 answer
  • How many grams of NaCl should be added to 250 grams of waterto<br> make a 0.40 m solution?
    6·1 answer
  • Match the vocabulary terms to their definitions.
    5·2 answers
  • Question 6 of 10
    6·2 answers
  • How many grams of 02 are present in 7.49 L of oxygen gas?
    15·1 answer
  • Which of the following does NOT happen during condensation?
    5·1 answer
  • Most females have one X and one Y (XY) sex chromosome.<br> true or false
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!