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3 years ago

Grams would be best to use to measure the mass of which of the following

Chemistry

1 answer:

gregori [183]3 years ago

6 0

Answer:

Explanation:

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PLEASE HELP! List the 5 basic steps of the scientific method in order

Kruka [31]

Step 1: Ask a question or identify a problem. ...Step 2: Background research. ...Step 3: Form a hypothesis. ...Step 4: Experiment and observe. ...Step 5: Draw a conclusion.

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3 years ago

1. john needs to create a buffered solution at a ph of 3.5 for his biomedical laboratory

Lunna [17]

Answer:

Use a ratio of 0.44 mol lactate to 1 mol of lactic acid

Explanation:

John could prepare a lactate buffer.

He can use the Henderson-Hasselbalch equation to find the acid/base ratio for the buffer.

$\text{pH} = \text{pK}_{\text{a}} + \log\dfrac{\text{[A$^{-}$]}}{\text{[HA]}}\\\\3.5 = 3.86 + \log\dfrac{\text{[A$^{-}$]}}{\text{[HA]}}\\\\\log\dfrac{\text{[A$^{-}$]}}{\text{[HA]}} = 3.5 - 3.86 = -0.36\\\\\dfrac{\text{[A$^{-}$]}}{\text{[HA]}} = 10^{-0.36} = \mathbf{0.44}$

He should use a ratio of 0.44 mol lactate to 1 mol of lactic acid.

For example, he could mix equal volumes of 0.044 mol·L⁻¹ lactate and 0.1 mol·L⁻¹ lactic acid.

6 0

3 years ago

Help me please!!!!!!!!

alekssr [168]

Answer:

The element is CARBON

The number 6 refers to the ATOMIC NUMBER

the numbers 12, 13, and 14 refer to the ATOMIC MASS

how many protons and neutrons are in the first isotope?

6. 6

how many protons and neutrons are in the second isotope?

6. 7

how many protons and neutrons are in the third isotope?

6. 8

you are welcome :)

8 0

2 years ago

Question 1. In the following equation for the alpha decay of bismuth-214, supply the missing element that correctly completes th

Klio2033 [76]

Q1. TI (210/81Thallium)
Q2.
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3 years ago

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Is forms from coal, oil, and gas burning physical or chemical weathering

storchak [24]

The answer is chemical weathering

8 0

3 years ago