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
Lelu [443]
3 years ago
9

Two important ways that energy is transported in the world around us is through __________ and _________.

Chemistry
2 answers:
lana66690 [7]3 years ago
8 0
The two ways that energy can be transferred are by doing work and by heat transfer.
Paul [167]3 years ago
3 0
Work and heat transfer
You might be interested in
what is the balanced equation for the reaction of solid magnesium metal with oxygen gas to produce solid magnesium oxide
GaryK [48]

Answer:

2Mg + O₂ ⟶ 2MgO

Explanation:

Step 1. Start with the most complicated-looking formula (O₂?).

Put a 1 in front of it.

Mg + 1O₂ ⟶ MgO

Step 2. Balance O.

We have fixed 2 O on the left. We need 2O on the right. Put a 2 in front of MgO.

Mg + 1O₂ ⟶ 2MgO

Step 3. Balance Mg.

We have fixed 2 Mg on the right-hand side. We need 2 Mg atoms on the left. Put a 2 in front of Mg.

2Mg + 1O₂ ⟶ 2MgO

Every formula now has a coefficient. The equation should be balanced. Let’s check.

<u>Atom</u>  <u>On the left</u>  <u>On the righ</u>t

  Mg             2                  2

  O                2                  2

All atoms are balanced.

The balanced equation is

2Mg + O₂ ⟶ 2MgO

4 0
3 years ago
Chemists use letters of the alphabet as ____ for the elements.
d1i1m1o1n [39]

Answer:

The symbol is the right answer.

Explanation:

The “ Symbol” is the correct answer because chemist uses the letters of the alphabet to denote the element. For instance, the element oxygen is denoted by the letter of the alphabet “O”, the hydrogen is denoted by the letter of alphabet “H”, Boron is denoted by the letter of alphabet “B”, etc. Here these are the examples that use one letter but there are other elements that use more than 1 letter as the symbol. For example, the Chlorine is represented by the Cl.

8 0
3 years ago
If you start with 13 mole H2O and 50 grams of O2 what is the percent yield of H202 if 100 grams of H202 is actually made?
dmitriy555 [2]

Answer:

94.1 %

Explanation:

We firstly determine the equation:

2H₂O + O₂ →  2H₂O₂

2 moles of water react to 1 mol of oxygen in order to produce 2 moles of oxygen peroxide.

We convert the mass of oxygen to moles:50 g . 1mol /32g = 1.56 mol

Certainly oxygen is the limiting reactant.

2 moles of water react to 1 mol of oxygen.

13 moles of water may react to 13/2 = 6.5 moles. (And we only have 1.56)

As we determine the limiting reactant we continue to the products:

1 mol of O₂ can produce 2 moles of H₂O₂

Then 1.56 moles of O₂ will produce (1.56 . 2) = 3.125 moles

We convert the moles to mass: 3.125 mol . 34 g/mol= 106.25 g

That's the 100% yield or it can be called theoretical yield.

Percent yield = (Yield produced / Theoretical yield) . 100

(100g / 106.25 g) . 100 = 94.1 %

3 0
3 years ago
According to the collision theory, what happens in a collision without sufficient energy or correct orientation
ohaa [14]
Hi!

In collision theory, for a chemical reaction to occur - there must be <em>sufficient </em>energy to break down chemical bonds.
 
We call this the activation energy, as it's the energy needed to <em>activate </em>a chemical reaction! 

Hopefully, this helps! =)
3 0
3 years ago
Read 2 more answers
Part A<br> Which state of matter has atomic spacing that is close together and definite shape?
dlinn [17]

Answer:

Solid

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • In Europe gasoline is often sold in liters. If a typical fill-up requires 11 gal of gas, how many liters are necessary?
    6·1 answer
  • All of the following are true about the Earth’s inner core EXCEPT
    5·1 answer
  • What is the name of the compound Ca(NO3)2 ?
    14·1 answer
  • Express each of the following in standard form.
    7·1 answer
  • What do you think would happen if a solid were exposed to extremely cold temperatures, or if a gas were exposed to extremely hot
    10·1 answer
  • Does anyone have any idea what this means lol
    11·1 answer
  • Thea is doing a chemistry experiment. The instructions say she needs to use pure water. Hamza offer her a bottle labelled “100%
    15·1 answer
  • In addition to the two types of motion found in liquids, gases have <br> What kind of motion
    9·1 answer
  • Which electron configuration represents the electrons of an atom in an excited state?
    13·1 answer
  • Why do you think that tsunamis occur most commonly in the Pacific Ocean?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!