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
In-s [12.5K]
2 years ago
7

Help! answer 7 & 9 please.​

Chemistry
1 answer:
WITCHER [35]2 years ago
6 0

Answer:

7 : I think it is because heat rises, and to make the hot air balloon ride is the fire torch inside it.

Explanation:

I donno 9

You might be interested in
Large power plants in the United States use __________ generators.
erma4kov [3.2K]
Your answer is going to be AC
3 0
3 years ago
How many significant figures are in 1.2 x 10^5
OLEGan [10]

Answer:

2

Explanation:

The 1 & 2 are both signifigant becuase they are presented in scientific notation.

3 0
3 years ago
Protons Ha and Hb in the compound given are _________. homotopic enantiotopic diastereotopic mesotopic none of these
jek_recluse [69]

Protons Ha and Hb in the compound given are enantiotopic.

<h3>What are enantiotopic protons?</h3>

Enantiotopic protons can be defined as those protons that can be replaced by another groups like deuterium.

<h3>What is a compound?</h3>

A compound is a substance which contains two or more elements chemically combined together.

So therefore, Protons Ha and Hb in the compound given are enantiotopic.

Learn more about enantiotopic protons:

brainly.com/question/24106290

#SPJ1

8 0
2 years ago
As with any drug, aspirin (acetylsalicylic acid) must remain in the bloodstream long enough to be effective. Assume that the rem
Olenka [21]

Answer:

180 mg

Explanation:

For a first-order reaction, we can calculate the amount of aspirine (A) at a certain time (t) using the following expression.

A=A_{0}.e^{-k.t}

where,

k: rate constant

A₀: initial amount

If we know the half-life (t_{1/2}) we can calculate the rate constant.

k=\frac{ln2}{t_{1/2}} =\frac{ln2}{3h} =0.2h^{-1}

When t = 4 h and A₀ = 400 mg, A is:

A=400mg.e^{-0.2h^{-1}\times 4h} =180mg

4 0
3 years ago
The following equation shows the correct molecules formed in the reaction, but the products are incorrect. CH4 +202=H20+ CO2 How
Hunter-Best [27]
For the equation to balance out, you would need 2 H2O on the product. That will give a total of 1 Carbon, 4 Hydrogens and 4 Oxygens on each side.
5 0
4 years ago
Other questions:
  • Is nail polish a pure substance or a mixture?
    6·2 answers
  • How many particles are contained in 2.75 moles of aluminum fluoride?
    11·1 answer
  • A sample of the sugar d-ribose (C5H10O5) of mass 0.727 g was placed in a calorimeter and then ignited in the presence of excess
    11·1 answer
  • Of organic molecules with similar properties under the same set of conditions, lightest are most likely to be _____ while heavie
    15·1 answer
  • What is the difference between a universal law and a scientific theory?
    11·1 answer
  • Question 3 (10 points)<br> How many valence electrons are in a neutral atom of Neon-212
    7·1 answer
  • Given: glow is a find the indicated measure.​
    9·1 answer
  • When a popsicle melts, the particles
    7·1 answer
  • What substance and mixture have in common?
    9·1 answer
  • (a) (1)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!