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4 years ago

What did George Washington Carver discover?

1 answer:

6 0

George Washington Carver<span> was a prominent American scientist and inventor in the early 1900s. </span>Carver<span> developed hundreds of products using the peanut, sweet potatoes and soybeans. He also was a champion of crop rotation and agricultural education.</span>

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Substances like neon , which is a gas at room temperature and pressure, can often be liquified or solidified only at very low te

marshall27 [118]

Answer:

Condenses at 27.25K.

Freezes at 24.65K.

Explanation:

In order to solve this above question, there is is need to make use of the following equation. The main idea here is to convert degree celsius to Kelvin. Hence,

0°C + 273.15 = 273.15K---------------------(1).

Therefore, we will make use of the above equation (1) and slot in the values for at degree celsius at which it condenses and at degree celsius at which it freezes.

So, we have at temperature at which it condenses:

-245.9°C + 273.15 = 27.25K.

Also, we have at temperature at which it freezes.

-248.5°C + 273.15 = 24.65K.

8 0

3 years ago

Both coal and diamonds are forms of elemental carbon. Coal is brittle while diamonds are considered to be the hardest of all sub

iragen [17]

Although coal and diamonds are both composed of carbons alone, they differ in their properties because of the bonds present in each substance. Diamonds are composed of covalent bonds which are strong and is crystalline in nature which makes it sturdier. Coal is amorphous which allows the slipping of irregular layers to each other making coal brittle

5 0

3 years ago

A reaction between liquid reactants takes place at in a sealed, evacuated vessel with a measured volume of . Measurements show t

Semmy [17]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The pressure is $P = 0.76 \ atm$

Explanation:

From the question we are told that

The mass of the carbon monoxide is $m_c = 17 \ g$

The temperature at which takes place $T = 30 .0^oC = 30 + 273 = 303 K$

The volume of the sealed vessel is $V = 20 .0L$

Generally the ideal gas law is mathematically represented as

$PV = nRT$

Where R is the gas constant with value $R = 0.0821 \ L \ atm \ mol^{-1} K^{-1}$

n is the number of moles of carbon monoxide which is mathematically evaluated as

$n = \frac{m_c}{M_c}$

where $M_c$ is the molar mass of carbon monoxide which is a constant with value

$M_c = 28 \ g/mol$

So $n = \frac{17}{28}$

$n =0.6071$

Now Making P the subject we have

$P =\frac{ 0.6071 * 0.0821 * 303}{20}$

$P = 0.76 \ atm$

5 0

3 years ago

In the laboratory you dilute 2.49 ml of a concentrated 6.00 m hydrochloric acid solution to a total volume of 50.0 ml. what is t

Marizza181 [45]

Equation: M1V1 = M2V2

Where M = concentration & V = volume

Step 1: Write down what is given and what you are trying to find

Given: M1 = 6.00M, V1 = 2.49mL, and V2 = 50.0mL
Find: M2

Step 2: Plug in the values into the equation

M1V1 = M2V2
(6.00M)(2.49mL) = (M2)(50.0mL)

Step 3: Isolate the variable (Divide both sides by 50.0mL so M2 is by itself)

(6.00M)(2.49mL) / (50.0mL) = M2

Answer: M2 = 0.30M
*Don't forget sig figs & units!

4 0

3 years ago

Kayla is creating a model to show her understanding of the water cycle. She wants to show that water is constantly cycling betwe

Orlov [11]

Answer:C

Explanation:

It would be the most visually understandable.It would be easyer to understand what you are modeling.

3 0

3 years ago