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fiasKO [112]
3 years ago
15

Buck's Turf Care Company mowed 233 lawns over a 11 week period. What is the average weekly rate of mowing lawns?

Chemistry
1 answer:
masya89 [10]3 years ago
6 0

Answer: 21 lawns per week

Explanation:

The average weekly rate refers to how many lawns were mowed per week given that 233 were done in 11 weeks.

Rate will be given by;

= Lawns mowed / Weeks taken

= 233 / 11

= 21 lawns per week

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Brian is testing to see how much water plants need. Why is it important that Brian includes a control group? A) To observe wheth
bija089 [108]

Answer: B or C

Explanation: The question does not include the variable or steps Brian is using so either one could be correct. It has to be the one that he is controlling though. This is because a control group is used to rule out any alternate explanations. Therefore the answer should be the one that he is trying to test out.

7 0
2 years ago
What is missing from the temperature and volume graph shown at right?
Kaylis [27]

Answer: Three things are missing:


i) Graph title.


ii) Label for the vertical axis.


iii) The scale and the units for the horizontal axis.


Justification:


1) Find the graph in the image attached.


2) What does the graph represent? You cannot tell because it does not show the tittle.


Since you are told in the statement that it is a temperature and volume graph, the appropiate title would be:


Temperature vs. Volume.


3) The vertical axis also must be properly labeled, including the units.


A good label for the vertical axis of this graph might be: Volume (cm³). It migh also be liters, gallons, or other volume unit.


4) Although the horizontal axis is labeled, it does not indicate the units and the scale. So, you know neither if the temperature shown is celsius, (°C), farenheti (°F), kelvin (K), or rankine (R) (those are the four major scales of temperature), nor how much each division represent (1, 5, 10, 10, 50, 100?)

4 0
3 years ago
Which solution is the most concentrated? 2.0 mL of 10 M H2SO4, where H2SO4 has a molar mass of 98 g/mol 5.0 mL of 1.0 M PbSO4, w
marishachu [46]

Answer: the option 4) 2.0 mL of 10.5 M H₂O₂, where H₂O₂ has a molar mass of 34 g/mol.

Its concentration is 10.5 M.

Explanation:

1) The unit M means molar. It is the molarity of the solution.

Molartity is the concentration of the solution expressed as number of moles of solute per liters of solution.

The formula of molarity, M, is:

M = number of moles of solute / volume of solution in liters

2) 2.0 mL of 10 M H₂SO₄, where H₂SO₄ has a molar mass of 98 g/mol

⇒ concentration is 10 M

3) 5.0 mL of 1.0 M PbSO₄, where PbSO₄ has a molar mass of 303 g/mol

⇒ concentration = 1.0 M

4) 2.0 mL of 10.5 M H₂O₂, where H₂O₂ has a molar mass of 34 g/mol

⇒ concentration is 10.5 M

5) 100 mL of 10 M NaCl, where NaCl has a molar mass of 58 g/mol

⇒ concentration is 10 M

7 0
3 years ago
Read 2 more answers
How is a compound different from mixtures
borishaifa [10]

Answer: a compound is a substance that is made up of more than one type of atoms bonded together, mixtures are a mix of multiple elements or compounds which haven't bonded together.  

Explanation:

8 0
2 years ago
Jorge conducted an experiment, and included the graph shown below as part of his lab report.
sergiy2304 [10]

Answer:physical change

Explanation:

8 0
2 years ago
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