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
liraira [26]
2 years ago
9

If a sprinter runs 101 m in 66 seconds what's the average speed and M/S

Chemistry
1 answer:
spayn [35]2 years ago
4 0

Answer:

Explanation:

101 m/ 66 s = 1.53 m/s

You might be interested in
The reduction of aldehydes, ketones, organic acids and their derivative of the process of alcohols is used for
ikadub [295]

Answer:

Widening of blood vessels.

Explanation:

The reduction of aldehydes, ketones, organic acids causes the formation of alcohols that is used for different process in the human body. This alcohol increase the width of the blood vessels as it enters the bloodstream causing greater flow of blood to the skin surface as well as temporary feeling of warmth. It also increased heat loss and rapid body temperature decrease that produces cooling effect in the body.

8 0
3 years ago
How do you balance redox equations in acidic solutions?
Anuta_ua [19.1K]

Answer:

First, balance the half-reactions

Second, equalize the electrons

Third,add two reaction equations to get final answer

Explanation:

For example

H₂C₂0₄ + MnO⁻₄ ---------->CO₂+Mn²⁺

(i) Balancing the half reactions

H₂C₂O₄-------->2CO₂+2H⁺+2e⁻

5e⁻ +8H⁺+MnO₄⁻----------->Mn²⁺+4H₂O

(ii)

Equalizing the electrons

5H₂C₂O₄--------->10CO₂+10H⁺+10e⁻  ---here there is a factor of 5

10e⁻+16H⁺+2MnO₄⁻--------->2Mn²⁺+8H₂O -----here there is a factor of 2

(iii)

Add the two where electrons and some Hydrogen ions will cancel out

5H₂C₂O₄+6H⁺+2MnO₄⁻---->10CO₂+2Mn²⁺+8H₂O

7 0
2 years ago
What is the difference between a material having the chemical property of being flammable vs having the chemical property of bei
makkiz [27]

Answer:

Being flammable means it supports burning,e.g. Oxygen, but being combustible means burning itself too. e.g. Hydrogen.

Explanation:

Hope it helps!!

4 0
3 years ago
Explain how you would decide which represents a greater mass: 3.25 x 1022 atoms of Ca or 2.45 grams of Mg?
elena55 [62]

Answer:

  • <u>You need to convert the number of atoms of Ca into mass in grams, using Avogadro's number and the atomic mass of Ca.</u>

Explanation:

The amount of matter is measured in grams. Thus, you need to convert the number of atoms of Ca (calcium) into mass to compare with 2.45 grams of Mg.

To convert the atoms of calcium into mass, you divide by Avogadro's number, to obtain the number of moles of atoms, and then divide by the atomic mass of calcium.

<u />

<u>1. Number of moles, n</u>

      n=\dfrac{\text{number of atoms}}{\text{Avogadro's number}}\\ \\ \\ n=\dfrac{3.25\times 10^{22}}{6.022\times 10^{23}}=0.053969mol

<u />

<u>2. Mass</u>

  • mass = number of moles × atomic mass
  • mass = 0.053969mol × 40.078g/mol = 2.16g

Then, 2.45 g of Mg represent a greaer mass than the 3.25 × 10²² atoms of Ca.

4 0
3 years ago
which two will help you measure how different colors absorb the energy in sunlight is it beaker or thermometer
KATRIN_1 [288]
Beaker does thermometer measures the thermal energy in the air
6 0
3 years ago
Other questions:
  • Helpppppppppppppppppppppppppppppppppppppppppppp
    12·1 answer
  • The compound CaSO4 ionizes into a calcium ion and a sulfate ion (SO4). Calcium has two electrons in its outer shell. Upon ioniza
    11·1 answer
  • Suppose the amu had been defined as 110th of the mass of a phosphorus atom. What would be the relative mass of carbon-12?
    7·1 answer
  • What task can a cell NOT perform on its own?
    15·1 answer
  • The element silver has an atomic weight of 108 and consists of two stable isotopes silver-107 and silver-109. The isotope silver
    6·1 answer
  • If I have an unknown quantity of gas at STP with a volume of 41 liters, how many moles of gas do
    7·1 answer
  • HeLpPp asap I’ll mark you as brainlister
    13·1 answer
  • 2. Explain Why would it be difficult to find the volume of a rock using<br> a ruler?
    9·1 answer
  • Short Response
    7·1 answer
  • What is the change in the freezing point of water when 35.0 g of sucrose is
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!