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rodikova [14]
3 years ago
15

What is ancient japan remembered for

Chemistry
1 answer:
Katarina [22]3 years ago
3 0
Hi!

The Samurai is what I would attribute to the memory of Ancient<span> Japan.</span>
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A substance having
denpristay [2]

Explanation:

Specific heat capacity is how much is required to heat the unit of mass by one degree. Therefore, if you have a higher heat capacity it required more energy, therefore, it takes longer to heat up. whereas having a lower heat capacity it takes less time to best up as it requires less energy.

7 0
4 years ago
What three factors affect the biodiversity of an ecosystem
Korolek [52]
<span>Factors that affect biodiversity in an ecosystem include area,climate,diversity of niches,and keystone species.</span><span />
5 0
3 years ago
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Can someone please help me:( please dont scroll <br><br> create 2 quantitative observations
shusha [124]

Answer:

a quantitative observation implies that the subject can be measured by quantity, aka amount or in numbers.

Ex 1: adding one gram of salt to one gram of sugar makes two grams of seasoning. in this example, there are individual quantities (1 gram of each) and total quantity (2 grams). this only changes if the substances have a chemical reaction, such as one of them destroying the other, then the weight would change.

Ex 2: a more simple example is the weight of something. putting the substance on a scale (one specifically for whatever you are measuring, whether it be liquid or solid) is the best way to determine its quantity.

7 0
2 years ago
The standard free energy of activation of a reaction A is 81.9 kJ mol–1 (19.6 kcal mol–1) at 298 K. Reaction B is one million ti
klasskru [66]

Answer:

54.9 kJ/mol

Explanation:

The relation between the activation energy (Ea) and the rate constant (k) is given by the Arrhenius equation.

k=A.e^{-Ea/RT}

where,

A is a collision factor

R is the ideal gas constant

T is the absolute temperature

Reaction B is one million times faster than reaction A at the same temperature. So k_{B}=10^{6} k_{A}.

Then,

k_{B}=10^{6} k_{A}\\A.e^{-Ea_{B}/RT}=10^{6}A.e^{-Ea_{A}/RT}\\e^{-Ea_{B}/RT}=10^{6}e^{-Ea_{A}/RT}\\ln(e^{-Ea_{B}/RT})=ln(10^{6}e^{-Ea_{A}/RT})\\\frac{-Ea_{B}}{RT} =ln10^{6} -\frac{Ea_{A}}{RT} \\Ea_{B}=(ln10^{6} -\frac{Ea_{A}}{RT}).(-RT)=(ln10^{6}-\frac{89.1kJ/mol}{(8.314\times 10^{-3} kJ/mol.K).298K} ).(-8.314\times 10^{-3} \frac{kJ}{mol.K}.298K )=54.9kJ/mol

8 0
3 years ago
What are 5 uses of Iron or its common compounds? (10 points)
Sveta_85 [38]

1. To make steel

2. It's salts are used to treat anaemia.

3. Pure iron is used in magnets.

4. It is used as a catalyst in the Haber Process which makes ammonia.

5. A very pure iron called wrought iron is used for ornamental gates or fences.

5 0
3 years ago
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