All categories

4 years ago

Hypotheses about historical Singular events are not testable by the scientific method because they are repeatable

Chemistry

1 answer:

garri49 [273]4 years ago

6 0

That is not true because hypothesis is when somebody or something predicts what an experiment will turn out to be...

You might be interested in

Which compound reacts third fastest with fuming sulfuric acid? a. Toluene b. Chlorobenzene d. Nitrobenzene e. Benzene c. Aniline

cupoosta [38]

Toluene compound reacts third fastest with fuming sulfuric acid.

The reaction is attached in figure -

When nitration of toluene is carried out in presence of fuming nitric acid and fuming sulfuric acid under 333 K temperature , 2, 4, 6-trinitro toluene is the final product .
This 2, 4, 6-trinitro toluene is also called TNT.
TNT is used as explosive.

What is toluene?

Toluene is a common ingredient in degreasers. It's a colorless liquid with a sweet smell and taste. It evaporates quickly.
Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues.

What is a toluene used for?

Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues.
In homes, toluene may be found in paint thinners, paintbrush cleaners, nail polish, glues, inks and stain removers.

Learn more about Toluene

brainly.com/question/9530946

#SPJ4

3 0

2 years ago

A 0.158 g sample of magnesium metal reacts completely with 100.0 mL of 1.0 M hydrochloric acid in a coffee cup calorimeter. The

damaskus [11]

Explanation:

The given data is as follows.

mass = 0.158 g, volume = 100 ml

Molarity = 1.0 M, $\Delta T$ = $(32.8 - 25.6)^{o}C = 7.2^{o}C$

The given reaction is as follows.

$Mg(s) + 2HCl(aq) \rightarrow MgCl_{2}(aq) + H_{2}(g)$

So, moles of magnesium will be calculated as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $\frac{0.158 g}{24.305 g/mol}$

= $6.5 \times 10^{-3}$

= 0.0065 mol

Now, formula for heat released is as follows.

Q = $m \times C \times \Delta T$

= $\text{volume} \times \text{density} \times C \times \Delta T$

= $100 ml \times 1.0 g/ml \times 4.184 \times 7.2^{o}C$

= 3010.32 J

Hence, heat of reaction will be calculated as follows.

$\Delta H_{rxn} = \frac{\text{-heat released}}{\text{moles of Mg}}$

= $\frac{3010.32 J}{0.0065 mol}$

= -4.63 J/mol

or, = $-463 \times 10^{-5} kJ/mol$ (as 1 kJ = 1000 J)

Thus, we can conclude that heat of given reaction is $-463 \times 10^{-5}$ kJ/mol.

5 0

3 years ago

What is the true ratio of atoms in a molecule or formula unit called

Eva8 [605]

<span>The true ratio of atoms in a molecule or formula unit is called the molecular formula. This formula can show exactly how many and what types of atoms there are in a molecule, but it cannot show how they are arranged structurally. For example, the molecular formula for cyclopropane is C3H6. </span>

6 0

4 years ago

Read 2 more answers

What is the molar mass of Cu(OH)2

Mice21 [21]

Answer:

97.54

Explanation:

Molar mas of cu (oh) 2

Cu = 63.54

O x 2 = 16 x 2 = 32

H x 2 = 1 x 2 = 2

TOTAL = 97.54

6 0

4 years ago

g. Hot water at 100 °C is added to 300 g of water at 0 °C until the final temperature is 40 °C. Find the mass of the hot water a

Evgen [1.6K]

Answer:

000

Explanation:

name

God

000answer

8 0

2 years ago