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agasfer [191]
3 years ago
11

What is a trial in science

Chemistry
1 answer:
Daniel [21]3 years ago
5 0

Answer:

D

Explanation:

one of a series of test

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How do you find the molar mass for ba(NO3)2
Korvikt [17]
To find the molar mass<span> of </span>Ba(NO3)2<span>, determine the </span>molar masses of all the atoms that form it. The Molar mass for Barium nitrate is <span>261.337 g/mol.</span>
8 0
3 years ago
What is the mass of 4.70 mol H2O? Answer in units of g.
Blizzard [7]

Answer:

4.70 moles of water have mass of 84.6g

Explanation:

Given data:

Number of moles of water = 4.70 mol

Mass in gram = ?

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of water is 18 g/mol

Mass = 4.70 mol × 18 g/mol

Mass = 84.6 g

Thus, 4.70 moles of water have mass of 84.6g.

8 0
3 years ago
I need help
liubo4ka [24]

The activation energy in the diagram is 43.8 kcal/ mole, letter C. You have to note that activation energy is the energy needed for the reaction to occur and produce products. Therefore, the spike after H2 and I2 is reacted is the activation energy of the reaction.

3 0
4 years ago
Suppose a student prepares a buffer that is intended to be pH 7.20. However, when the student tests its pH using a pH probe, the
MAXImum [283]

  1. A calibration error could lead to this result, if the pH probe was not properly calibrated before being used, the measured value of pH would be different from the actual pH value. Meaning in this case the student correctly prepared the buffer.
  2. While measuring the mass of the buffer's acid component (for example NaH₂PO₄), the student did not properly set the balance to zero before proceding to weigh the compound, causing the mass readings to be underestimated. As a result, the student weighed more acid than required, eventually leading to a decreased pH value.
6 0
4 years ago
What does this picture represent?
WARRIOR [948]

the answer is d electronic balance

8 0
3 years ago
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