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Nataly_w [17]
2 years ago
12

Why is it important to make measurements using a standard?

Chemistry
1 answer:
ohaa [14]2 years ago
7 0

A standard unit of measurement is a quantifiable language that helps everyone understand the association of the object with the measurement. It is expressed in inches, feet, and pounds, in the United States, and centimeters, meters, and kilograms in the metric system.

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Can you calculate the energy needed to increase the temperature of 100kg of iron by 40°C?
VLD [36.1K]

Answer: 177600 J or 177.6kJ

Explanation:

For this problem, we need to use q = mcAT

we have m = 10000, and AT= 40. The specific heat of iron is 0.444.

So now we can plug it in: q = 10000*.444*40 = 177600 J or 177.6kJ

3 0
3 years ago
Read 2 more answers
What elements comprise the largest portion of Earth's atmosphere?​
Mrrafil [7]

Answer:

Nitrogen and Oxygen make up 99% of the Earths atmosphere. Then Argon makes up the rest of the atmosphere.

3 0
3 years ago
What is enthalpy in chemistry pls help
Yakvenalex [24]
<span>a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system.</span>
8 0
3 years ago
a minute sample of AlCl3 is analyzed for chlorine.The analysis reveal that there are 12 chloride ions present in the sample. How
nekit [7.7K]
You can solve this by saying that there are 3 Cl for every 1 Al therefore a ratio of 1:3. If you have 12 Cl ions you can find how many Al ions there is
so (x)Al : 12 a unkown amount of Al ions gives you 12 Al ions from the ratio we know that we have 1 Al for 3 Cl therefore we can divide 12 by 3 to get the number of Al ions. The answer is 4 Al ions for 12 Cl ions.
Hope this helps :).
7 0
3 years ago
How does heat transfer through conduction?
Nimfa-mama [501]

Answer:

from the warm object to the cool object

Explanation:

Think of heat as a straight line, and the warmer the object the higher its gradient. Now, if you have cold object is lower in heat energy, the heat energy from the warm object will go down the gradient to the cool object. Note, in conduction, there must a contact between the two objects.

7 0
3 years ago
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