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pav-90 [236]
3 years ago
13

Can someone help? this is hard .​

Chemistry
1 answer:
Natali [406]3 years ago
4 0
Drawing something can be pretty hard but with a little practice you should be able to draw anything.
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Balance the following chemical equation:<br> Mg(OH)₂ ​+ HCI → MgCI₂ ​+ H₂ ​O
geniusboy [140]

Answer:

Mg(OH)₂ ​+  2HCI → MgCI₂ ​+ 2 H₂ ​O

Explanation:

6 0
3 years ago
Two gases are combined and sealed in a 2.0 L container. The 3.0 L of argon gas and 1.0 L of xenon gas each exert 1.00 atm pressu
mariarad [96]

Answer:

Unless they chemically react with each other, the individual gases in a mixture of gases do not affect each other’s pressure. Each individual gas in a mixture exerts the same pressure that it would exert if it were present alone in the container . The pressure exerted by each individual gas in a mixture is called its partial pressure.

Explanation:

7 0
3 years ago
in Analytical chemistry laboratory. Nickle(ppm)in water sample estimated by two different students was as ,student 1 (25 24 24 2
frosja888 [35]

Answer:

Answers are in the explanation

Explanation:

Precision and accuracy are both statistical concepts. Precision is about how close are the measured values to each other. Accuracy is closeness of the measured values to a specific value or reference value.

There are many ways to calculate precision and accuracy, one is stimating precision as <em>Relative Uncertainty </em>and accuracy as <em>Relative Error.</em>

Formulas are:

Relative Uncertainty: Standard desviation /  Measured value.

Relative Error: Measured Value - Expected Value / Expected value

<em>Measured value is the aveage of the values.</em>

<em />

For student 1:

Mean = 25

Standard desviation = 1.5275

Relative Uncertainty: 1.5275 /  25

Relative Uncertainty: 0.061

Relative Error: 25 - 20 / 20

Relative Error: 0.25

For student 2:

Mean = 24.5

Standard desviation = 0.5477

Relative Uncertainty: 0.5477 / 24.5

Relative Uncertainty: 0.02

Relative Error: 24.5 - 20 / 20

Relative Error: 0.225

<em>As the student 2 has a low Relative error and uncertainty, you can say student 2 is more accurate and precise</em>

6 0
3 years ago
Does litmus paper indicate if a liquid is a base?
KIM [24]
Yes, I hope this helped
4 0
3 years ago
Read 2 more answers
What substance cannot be broken down by chemical change
ki77a [65]

Potassium is the simplest form of matter and therefore can not be broken down by chemical change.

5 0
3 years ago
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