CHEMISTRY COLLEGE

A car is traveling at 87.0 km/hr. How many meters will it travel in 37.0 seconds?

Answers

Answer 1
Answer:

Speed of the car = 87.0 (km)/(hr)

Given time = 37.0 s

Converting time from seconds to hours:

1 hr= 60 min; 1 min = 60 s

37.0 s * (1 min)/(60s)*(1 hr)/(60min) = 0.0103 hr

Calculating distance from speed and time:

0.0103 hr * (87.0 km)/(1 hr) =0.894 km

Converting distance from km to m:

0.894 km * (1000 m)/(1 km) = 894 m

So the distance traveled by the car in 37.0 s is 894 m.

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This is how osmium appears in the periodic table.A purple box has O s at the center and 76 above. Below it says osmium and below that 190.23.Rounded to the nearest whole number, how many neutrons, on average, are in an atom of osmium?76114190266
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Copper and iron(III) nitrate Does it have a reaction?
1. Which statement describes the particles of an ideal gas, based on thekinetic molecular theory?* O There are attractive forces between the particles. O The particles move in circular paths. O The collisions between the particles reduce the total energy of the gas. О The volume of the gas particles is negligible compared with the total volume of the gas.

What is anology?
What is microscope?​

Answers

Microphone thing is a little bit better but it was ok I gotta it looked good but it didn’t get me wrong it I made a comment on my phone number so ttyttttytt was the day I wanna was a good day and then I’ll send ya my stuff and I get to see ya my mom stuff is the best thing ever I just wanna was a

Which of the following describes a way in which chemistry affects how youuse a computer?
A. The colors in the computer display are the result of substances
that glow.
B. By clicking a mouse, you can select an object or text on a
computer screen.
C. Eye stress can be reduced by sitting a certain distance from the
Screen.
D. You are able to play video games by moving your body instead of a
joystick

Answers

A way in which chemistry affects how To use a computer is  The colors in the computer display are the result of substances that glow. Option A

In modern computers, the display technology commonly used is Liquid Crystal Display (LCD) or Light Emitting Diode (LED) technology. These displays rely on the principles of chemistry to produce the colors that we see on the screen.

In LCD screens, tiny liquid crystal cells are controlled by an electric current, which causes them to either block or allow the passage of light. Each cell represents a pixel on the screen, and by controlling the intensity of light passing through each pixel, different colors can be produced.

The liquid crystals used in LCD screens are organic compounds that exhibit unique optical properties, allowing them to manipulate light in a controlled manner.

LED screens, on the other hand, use arrays of light-emitting diodes to generate light. These diodes are made of semiconducting materials, often composed of compounds like gallium, arsenic, and phosphorus. When an electric current passes through these compounds, they emit light of a specific wavelength, resulting in the different colors displayed on the screen.

So, the colors we see on a computer display are a direct result of the chemical properties and behavior of the substances used in the LCD or LED technology. Chemistry plays a crucial role in the design and functionality of computer displays, enabling us to view vibrant and accurate colors while using our computers.

Option A

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How many Cal2 formula units are present
in 5.164 g of Call2?

Answers

Answer:

1.06x10²² formula units

Explanation:

First we convert 5.164 g of CaI₂ into moles, using its molar mass:

  • 5.164 g ÷ 293.887 g/mol = 0.0176 mol

Then we convert 0.0176 moles into formula units, using Avogadro's number, which relates the number of formula units present in 1 mol:

  • 0.0176 mol * 6.023x10²³ FormulaUnits/mol = 1.06x10²² formula units

The molecule XeF2 does not obey the octet rule. Draw its Lewis structure and state the type of octet-rule exception. Include lone pair electrons in the Lewis structure.

Answers

Answer: See attachment.

Explanation:

Exceptions to the octet rule fall into three categories:

  • An incomplete  octet.
  • An odd number of electrons.
  • More than eight valence electrons around the  central atom.  

In addition to the 3s and 3p orbitals, xenon also has 3d orbitals that can be used in bonding. These orbitals enable xenon to form an expanded octet.

Partc. explain why equal volumes of 0.1 m ch3cooh and 0.1 m nach3co2 function as a buffer solution, but equal volumes of 0.1 m hcl and 0.1 m naoh do not.

Answers

Answer : As per the definition of the buffer solution "It is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa".

so considering the above given condition for CH_(3) COOH and NaCH_(3)CO_(2) act as buffer because it satisfies and qualifies the conditions of behaving as a buffer when mixed in equal amounts,

whereas HCl and NaOH are strong acid and strong base which does not satisfies the criteria for being called as buffer.

As buffer needs a weak acid and its conjugate base to behave and act as buffer and resist any pH change.

A car travels with a speed of 91.4 kilometers per hour (km/hr). Convert this speed to meters per second (m/s). Show your work.

Round your final answer to three significant figures.

Type your answer...

Answers

Answer:

25.3889 m/s

Explanation:

We can simply write 91.4km/hr as,

91.4km

1 hr

=91400m

60 s × 60 s

=91400m

3600 s

= 25.3889 m/s
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