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musickatia [10]
3 years ago
10

Who are you voting for? if u r and if u could

Chemistry
2 answers:
rjkz [21]3 years ago
6 0

Answer:

Biden

Explanation:

stiks02 [169]3 years ago
4 0

Answer:

Biden

Explanation:

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How should students prepare to use chemicals in the lab? Select one or more: Sort the lab chemicals in alphabetical order for qu
maksim [4K]

Answer:

Sort the lab chemicals in alphabetical order for quick access.

Become familiar with the chemicals to be used, including exposure or spill hazards.

Locate the spill kits and understand how they are used.

Explanation:

There are many chemicals in a laboratory hence they should be sorted out and arranged in alphabetical order so that theory can easily be identified and located whenever they are required.

The properties of each chemical should be known especially hazards connected to exposure or spill of the chemicals.

The students should also familiarize themselves with the contents of spill kits and how they are used.

7 0
3 years ago
Boyle's Law states that when a sample of gas is compressed at a constant temperature, the pressure P and volume V satisfy the eq
____ [38]

Answer:

The gas is decreasing at a rate of 50 cubic centimeters per minute.

Explanation:

The Boyle's Law is represented by the following expression:

P\cdot V = k (1)

Where:

P - Pressure, in kilopascals.

V - Volume, in cubic centimeters.

k - Proportionality constant, in kilopascal-cubic centimeters.

By definitions of rate of change and implicit differentiation, we derive the following differential equation:

\dot P \cdot V + P\cdot \dot V = 0 (2)

Where:

\dot P - Rate of change of the pressure, in kilopascals per minute.

\dot V - Rate of change of the volume, in cubic centimeters per minute.

Then, we clear the rate of change of the volume within (2):

P\cdot \dot V = -\dot P\cdot V

\dot V = -\left(\frac{\dot P}{P} \right) \cdot V

If we know that P = 180\,kPa, \dot P = 30\,\frac{kPa}{min} and V = 300\,cm^{3}, then the rate of change of the volume is:

\dot V = -\left(\frac{\dot P}{P} \right) \cdot V

\dot V = -50\,\frac{cm^{3}}{min}

The gas is decreasing at a rate of 50 cubic centimeters per minute.

3 0
3 years ago
For an aqueous solution of sucrose (C12H22O11), determine: (a) the molarity of 3.30 L of a solution that contains 225.0 g of suc
dusya [7]

Answer:

a) Molarity = 0.199M

b) 21.6L of solution

c) 0.199 moles of sucrose in 1L

Explanation:

a) Molarity is the ratio of moles of solute (sucrose) in volume of solution (3.30L):

<em>Moles sucrose -Molar mass: 342,3g/mol-:</em>

225.0g * (1mol / 342,2965g) = 0.6573 moles

Molarity = 0.6573 moles / 3.30L

<h3>Molarity = 0.199M</h3><h3 />

b) 0.199M means 0.199 moles in 1L. 4.30 moles are in:

4.30 mol * (1L / 0.199mol) = 21.6L of solution

c) By definition, there are 0.199 moles of sucrose in 1L. This is the meaning of 0.199M

8 0
3 years ago
What did Bohr’s model of the atom include that Rutherford’s model did not have?
faust18 [17]
Maybe energy levels, hope this helps
5 0
3 years ago
Read 2 more answers
Imagine dissolving a spoonful of sugar in a glass of water. Is the sugar-water combination classified as a compound or a mixture
Sonja [21]

Answer:mixture

Explanation:

It will only be a compound if it forms another element.

6 0
3 years ago
Read 2 more answers
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