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Sedbober [7]
3 years ago
7

PLZ HELP, BRAINLIEST TO WHOEVER GIVES WORK TOO!!​

Chemistry
1 answer:
Flura [38]3 years ago
5 0

Answer:

1.15 hours

Explanation:

If they are going 100 kilometers an hour, and they need to go 115 k, then do 115/100 which is 1.15 which is the time

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If you added 45,000 calories to water that was at 25 degrees C, and the ending temperature was 35 degrees C, how much water did
user100 [1]

<u>Answer:</u>

<em>4.5 L water we have in litres (L).</em>

<em><u></u></em>

<u>Explanation:</u>

Q=m\times c \times \Delta T

where

\Delta T = Final T - Initial T

Q is the heat energy in calories

c is the specific heat capacity (for water 1.0  cal/(g℃))  

m is the mass of water

Plugging in the values  

\\$45000 \mathrm{cal}=m \times 1.0 \frac{\mathrm{cal}}{\mathrm{g}^{\circ} \mathrm{C}} \times\left(35^{\circ} \mathrm{C}-25^{\circ} \mathrm{C}\right)$\\\\$45000 \mathrm{cal}=m \times 1.0 \frac{\mathrm{cal}}{\mathrm{g}^{\circ} \mathrm{C}} \times 10^{\circ} \mathrm{C}$\\\\$m=\frac{45000 \mathrm{cal}}{1.0 \frac{\mathrm{cal}}{\mathrm{g}^{\circ} \mathrm{C}} \times 10^{\circ} \mathrm{C}}$\\\\$m=4500 \mathrm{g}$\\\\Density of water $=\frac{\text { mass }}{\text { volume }}$

So,

Volume of water = mass/density

\\\\=\frac{4500 \mathrm{g}}{\frac{1.09}{\mathrm{mL}}}=4500 \mathrm{mL}$$

=4.5 L (Answer)

6 0
3 years ago
Which equation or rule can be used to estimate the pseudo-critical properties of mixtures based on the pure-component critical c
sveticcg [70]

Answer:

c. Kay's rule

Explanation:

Kay's rule -

The rule is used to determine the pseudo reduced critical parameters of mixture , with the help of using the critical properties of the components of a given mixture .

The equation for Kay's rule is as follows ,

PV = Z RT

Where Z = The compressibility factor of the mixture .

Hence from the given options , the correct answer is Kay's rule .

5 0
3 years ago
Describe Dalton’s atomic theory.
ser-zykov [4K]

Answer:

Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.

Dalton based his theory on the law of conservation of mass and the law of constant composition.

The first part of his theory states that all matter is made of atoms, which are indivisible.

The second part of the theory says all atoms of a given element are identical in mass and properties.

The third part says compounds are combinations of two or more different types of atoms.

The fourth part of the theory states that a chemical reaction is a rearrangement of atoms.

Parts of the theory had to be modified based on the existence of subatomic particles and isotopes

6 0
3 years ago
Write a nuclear equation for the formation of iron-54 through fusion
maksim [4K]
Fe + heat ----> Fe_54 + + neutrons
7 0
3 years ago
Read 2 more answers
How much is 1kilometer ?
Lostsunrise [7]

1 kilometer is 1000 meters, 10000 decimeters, 100000 centimeters, 1000000 millimeters, 1.0000E+9 micron, 1.0000E+12 nanometer, 1.0000E+15 picometer, 1.0000E+18 femtometer, 1.0000E+21 attometer, and so much more.



8 0
3 years ago
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