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4 years ago

3. List the temperatures in order from warmest to

Chemistry

1 answer:

amid [387]4 years ago

8 0

Answer:

3°F, 0°F, -11°F, -16°F, -20°F

Explanation:

The Fahrenheit scale is a temperature scale proposed in 1724 by the physicist Daniel Fahrenheit.

In this scale:

- The freezing point of water is set at 32 degrees

- The boiling point of water is set at 212 degrees

One degree in the Fahrenheit scale is indicated with the symbol $^{\circ}F$ .

The equivalence between temperature in Celsius degrees and Fahrenheit degrees is as follows:

$T(^{\circ}C)=\frac{5}{9}(T(^{\circ}F)-32)$ to convert from Fahrenheit to Celsius

$T(^{\circ}F)=\frac{9}{5}(T(^{\circ}C)+32)$ to convert from Celsius to Fahrenheit

The Fahrenheit scale is an increasing monotonic scale, it means that temperature goes from negative values towards positive values without interruption. Therefore, the temperatures listed from warmest to coldest are:

3°F, 0°F, -11°F, -16°F, -20°F

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After 7.9 grams of sodium are dropped into a bathtub full of water how many grams of hydrogen gas are released

Nataliya [291]

Answer:

The grams of hydrogen gas that are released is 0.343 gram

Explanation:

Given that:

2 Na + 2h₂0 ⇒ 2Na0H +N₂

Molecules of Na = 7.9/2.3 = 0.343 mol Na

Now,

2 molecules of Na produces one mole h₂

0.343 mol of Na produce 0.343/2 = 0.1717 mol h₂

h2 = molecules * mw (molecular weight) =0.1717 * 2 =0.343 grams

Therefore the grams of hydrogen gas released is = 0.343 grams

6 0

4 years ago

Someone plz help me :(

Artemon [7]

Answer:

i guess it is C

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3 years ago

Read 2 more answers

In the combustion of gasoline, if it is calculated that 250.15 g of CO2 will be produced, but only 212.48 g are collected, what

S_A_V [24]

Answer:

To calculate the Carbon Dioxide - CO 2 - emission from a fuel, the carbon content of the fuel must be multiplied with the ratio of molecular weight of CO 2 (44) to the molecular weight of Carbon (12) -> 44 / 12 = 3.7 Emission of CO 2 from combustion of some common fuels are indicated in the table

Explanation:

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3 years ago

Which of the following is a characteristic property of the alkaline earth

34kurt

"They are harder than alkali metals" is a characteristic property of the alkaline earth metals.

Option: C

Explanation:

The strength of metallic bond is stronger in alkaline earth metals than alkali metals because of the existence of 2 electrons in its outermost or valence shell relative to alkali metal which has only 1 electron in valence shell. Thus alkaline earth metals are therefore harder than the alkali metals.

They are considered alkaline since they formulate solutions that have a pH higher than 7, rendering them alkaline or bases. Radium is produced by uranium decay, not all alkaline elements are radioactive. It's very toxic, and the handling is risky. Calcium and magnesium are essential for animals and plants.

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4 years ago

what is the concentration (molarity) of a solution where 149g of kcl is dissolved in enough water to get a total volume of the s

Anit [1.1K]

Molar mass KCl = 74.55 g/mol

Number of moles:

mass KC / molar mass

149 / 74.55 => 1.998 moles

Volume in liters: 500 mL / 1000 => 0.5 L

Therefore:

M = moles / volume

M = 1.998 / 0.5

M = 3.996 mol/L⁻¹

4 0

3 years ago