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
Vera_Pavlovna [14]
3 years ago
7

PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE H

ELP PLEASE HELP
DUE IN 5 MINUTES CHEMISTRY DIMENSIONAL ANALYSIS

In 2009, Usain Bolt ran 100 meters in 9.58 seconds. What is this speed in km/hr? (!! DIMENSIONAL ANALYSIS!! NOT A REGULAR PROBLEM)

Chemistry
1 answer:
Goryan [66]3 years ago
4 0
100 m = 0.1 km
9.58 sec = 9.58/3600 = 0.00266 hr
Speed = 0.1/0.00266= 37.6 km/hr
Can you mark it brainliest?
You might be interested in
What are the physical and chemical properties of iron oxide
Anika [276]

Answer: The physical properties of iron oxide are that it is an odorless, red-brown solid, and that it is insoluble. Depending on the chemical formula, one of the chemical properties is its combustibility. If the chemical formula is Fe2O3, it is not combustible. If the formula is FeO, it is readily combustible.

5 0
3 years ago
Two samples of potassium iodide are decomposed into their constituent elements. The first sample produced 13.0 g of potassium an
Cerrena [4.2K]

Answer:

79.4 kg

Explanation:

The formula for potassium iodide is:-

KI

This means that they are present in the same mole ration, i.e. 1 : 1

Also for 2 samples, the ratio of the masses must be equal .

So,

\frac{Mass\ of\ potassium\ in\ sample\ 1}{Mass\ of\ Iodine\ in\ sample\ 1}=\frac{Mass\ of\ potassium\ in\ sample\ 2}{Mass\ of\ Iodine\ in\ sample\ 2}

Thus,

Mass of potassium in sample 1 = 13.0 g

Mass of Iodine in sample 1 = 42.3 g

Mass of potassium in sample 2 = 24.4 kg

Applying in the above formula, we get that:-

\frac{13.0\ g}{42.3\ g}=\frac{24.4\ kg}{Mass\ of\ Iodine\ in\ sample\ 2}

Mass of iodine in sample 2 = 79.4 kg

5 0
3 years ago
What element transmits heat easily
pashok25 [27]
A conductor transmits heat and electrical good. 
8 0
3 years ago
A block of metal has a volume of 14.0in3 and weighs 5.16 lb .
riadik2000 [5.3K]

The density of metal block in grams per cubic centimeter is 10.70 g/cm³.

Given,

Mass of metal block = 5.16 lb  

1 lb = 453.592 g

5.26 lb = 2340.536 g

The volume of metal block = 14 in 3

1 in = 2.5 cm

1 in 3 = 15.625 cm³

14 in 3 = 218.75 cm³

Density is defined as the mass per unit volume of a substance. Or, it is the ratio of mass to the volume of the substance.

As we know,

Density = mass/volume

Or, density = 2340.536 / 218.75

Or, density = 10.70 g/cm³

Therefore, the density of the metal block is 10.70 g/cm³.

To learn more about the density, visit: brainly.com/question/15164682

#SPJ9

5 0
2 years ago
Most cars use water to cool their engines. Ethylene glycol, propylene glycol, or methanol may be added to the water, especially
NemiM [27]

Answer:

B

Explanation:

8 0
3 years ago
Other questions:
  • How many neutrons does an element have if its atomic number is 56 and its mass number is 152?
    7·1 answer
  • Is nail polish a pure substance or a mixture?
    6·2 answers
  • A _____ fireplace continues to radiate heat even after the fire is extinguished.
    6·2 answers
  • How many elements are in the following equation? salt pure water(NaC/<br> + H2O)
    7·2 answers
  • A rectangular aquarium is 47.2 cm wide, 89 cm long, and 65.38 cm tall. What is the volume of the aquarium? How many liters of wa
    9·1 answer
  • How does the chemical formula for the nitrite ion differ than the chemical formula for the nitrate ion?
    15·1 answer
  • How do i know if a reaction is exo/endothermic?
    5·1 answer
  • Maintaining constant pressure, the volume of a gas is increased from 12,0 L
    12·1 answer
  • What mass of Cu(s) is electroplated by running 19.5 A of current through a Cu2 (aq) solution for 4.00 h
    12·1 answer
  • If 3.00 liters of 2M HCl neutralizes 1.00 liter of NaOH, what is the molarity of the NaOH?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!