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
CaHeK987 [17]
3 years ago
13

Whats the answer to number 5?

Chemistry
2 answers:
Hunter-Best [27]3 years ago
5 0
C is the answer because he wants to know if less force is needed to pull on a slippery surface which reduces friction
rosijanka [135]3 years ago
5 0
The answer to number 5 is D
You might be interested in
What are three factors that control deep currents?
Lyrx [107]
Global winds, coriolis effect and <span>continental deflections. Hope this helps!</span>
8 0
3 years ago
Elements in what family are all gases?
Alina [70]

Answer:

Noble gases.

Good Luck & Have a good day!

(.❛ ᴗ ❛.)

6 0
3 years ago
How did the ice ages affect where people settled in America
skelet666 [1.2K]
Because the cold could freeze them, and they could get hypothermia.
6 0
3 years ago
A sample originally contained 1.28 g of a radioisotope. It now contains 1.12 g of its daughter isotope.
dexar [7]
The answer is 3.

<span>The relation between number of half-lives (n) and decimal amount remaining (x) can be expressed as:

</span>(1/2) ^{n} =x

We need to calculate n, but we need x to do that. To calculate what p<span>ercentage of a radioactive species would be found as daughter material, we must calculate what amount remained:
1.28 -</span> 1.12 = 0.16

If 1.28 is 100%, how much percent is 0.16:
1.28 : 100% = 0.16 : x
x = 12.5% 
Presented as decimal amount:
x = 0.125


Now, let's implement this in the equation: 

<span>(1/2) ^{n} =0.125
</span>
Because of the exponent, we will log both sides of the equation:
n * log(1/2) = log(0.125)
n = \frac{log(0.125)}{log(1/2)}
<span>n = \frac{log(0.125)}{log(0.5)}
</span>n= \frac{-0.903}{-0.301}
n = 3

Therefore, 3 half-lives have passed <span> since the sample originally formed.</span>
4 0
3 years ago
Read 2 more answers
1. Given the following equation:
CaHeK987 [17]

Answer:

a. C₄H₁₀/O₂    =  2:13 (example)

b. O₂/CO₂      = 13:8

c. O₂/H₂O      = 13:10

d. C₄H₁₀/CO₂ =  2:8

e. C₄H₁₀/H₂O =  2:10

Explanation:

2C₄H₁₀ + 13O₂ ⟶ 8CO₂ + 10H₂O

The molar ratios are the same as the coefficients in front of the formulas.

3 0
3 years ago
Other questions:
  • What is part of every cell
    9·2 answers
  • HELP PLEASE<br>Explain why the elements of group 1 and 7 are quite reactive
    11·1 answer
  • Zeke is on spring break. He lives in a cold climate, so he decides to drive to a warmer climate. Before he leaves for his vacati
    5·2 answers
  • A prostar has a high enough ________ to become a star
    11·2 answers
  • Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Ka fo
    12·1 answer
  • what does NaBr + Ca(OH)2 -&gt; CaBr2 + NaOH make, what rection for an example rust. is it aa chemical reaction? please reply asa
    15·2 answers
  • A toy that is green under white light is illuminated by blue and green light, what color do you perceive?
    8·1 answer
  • AAAAAAAAAAAAAA MATIAS IS HERERERERE
    8·2 answers
  • Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon
    14·1 answer
  • Name the following ether: OCH2CH3
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!