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Diano4ka-milaya [45]
3 years ago
10

I don't know how to do this?helpppp!

Chemistry
1 answer:
Charra [1.4K]3 years ago
4 0
Joules? i m not sure about this E Q U A S I O N
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What mass of agno3 can be dissolved in 250 g of water at 20 c?
Arisa [49]
More information please
3 0
4 years ago
Which three temperature readings all mean the same thing?
Viktor [21]

Answer:

C). 373 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit

Explanation:

Kelvin and Celsius are related using the equation K = C + 273.

Celsius and Fahrenheit are related using the equation F = (9/5) * C + 32.

This means that Kelvin and Celsius have to differ by 273, in which only B and C fit that description.

Then you can look at the Celsius and Fahrenheit readings from B and C and apply the equation F = (9/5) * C + 32. For B, you take 0 degrees Celsius and substitute it in for C to get F = (9/5) * 0 + 32, in which you get 32 degrees Fahrenheit and <em>not </em>the 212 degrees in answer B. For C, you do the same: F = (9/5) * 100 degrees Celsius + 32 = 212 degrees Fahrenheit, which does agree with the answer. Therefore, it must only be C.

3 0
3 years ago
Which material has been recycled for over 3,000 years?
Juliette [100K]

Answer:

B. glass

Explanation:

I did research about the topic.

4 0
3 years ago
Read 2 more answers
Does anyone know the answer to this chemistry question?!?
Pepsi [2]

Answer:

Mass of HCl = 73 g

Explanation:

Given data:

Mass of hydrogen = 2 g

Mass of HCl = ?

Solution:

First of all we will write the balance chemical equation:

H₂ + Cl₂   →  2HCl

Number of moles of hydrogen = 2 g/ 2g/mol

Number of moles of hydrogen = 1 mol

Form balanced chemical equation compare the moles hydrogen with HCl.

                   H₂    :   HCl

                    1      :    2

Mass of HCl:

Mass of HCl = number of moles × molar mass

Mass of HCl = 2 mol × 36.5 g/mol

Mass of HCl = 73 g

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4 years ago
Identifique a equação que forma uma base:
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C. H20 + CaO = Ca(OH)2
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3 years ago
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