CHEMISTRY MIDDLE SCHOOL

The process of photosynthesis is essential in the oxygen/carbon dioxide cycle. Photosynthesis removes ______ from the atmosphere and produces and releases ______ into the atmosphere.A) glucose, oxygen
B) oxygen, glucose
C) carbon dioxide, oxygen
D) oxygen, carbon dioxide

Answers

Answer 1
Answer: Photosynthesis removes carbon dioxide from the atmosphere and releases oxygen into the atmosphere. The answer is C. 
Answer 2
Answer: C) Carbon dioxide is removed and Oxygen is produced and released.

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What is the wavelength of these waves?

Answers

it measure the distance between two consecutive waves within the phase.

Which of the following will most likely happen if the pancreas does not produce sufficient glucagon?1. Blood sugar will decrease because glucagon increases blood sugar when it falls too low.

2. Blood sugar will increase because glucagon increases blood sugar when it falls too low.

3. Blood sugar will decrease because glucagon lowers blood sugar when it rises too high.

4. Blood sugar will increase because glucagon lowers blood sugar when it rises too high.

Answers

Answer: 1 Blood sugar will decrease because glucagon increased blood sugar when it falls too low

Answer:

1. Blood sugar will decrease because glucagon increases blood sugar when it falls too low.

A closed container is filled with 2 moles of hydrogen gas and 2 moles of oxygen gas. The gases react to form water.Write a balanced equation for this reaction.

Answers

Answer:

2H_2+O_2=2H_2O

Explanation:

The chemical formula for hydrogen is H while chemical formula for oxygen is O

Considering that two moles of hydrogen and 2 moles of oxygen react to form water, the equation will be

2H_2+2O_2=H_2O

The number of oxygen molecules don't balance on both LHS and RHS hence to balance it, we put it as follows

2H_2+O_2=2H_2O

Normally, two moles of hydrogen require only one mole of oxygen to form two moles of water.

if 20.0g of N2 gas has a volume of 0.40L and a pressure of 6.0atm, what is the temperature in degrees celsius?

Answers

Answer:

-232 °C

Explanation:

We can use the Ideal Gas Law and solve for T.

pV = nRT

Data:  

m = 20.0 g

p = 6.0 atm

V = 0.40 L

R = 0.082 06 L·atm·K⁻¹mol⁻¹

Calculations:

1. Moles of N₂

\text{n} = \text{20.0 g} * \frac{\text{1 mol}}{\text{28.01 g}} = \text{0.7140 mol}

2. Temperature of N₂

\begin{array} {rcl}pV & = & nRT\n\text{6.0 atm} * \text{0.40 L} & = & \rm\text{0.7140 mol} * 0.08206 \text{ L}\cdot\text{atm}\cdot\text{K}^(-1)\text{mol}^(-1) * T\n2.40&=&0.05859T\text{ K}^(-1)\nT& =& \frac{2.40 }{0.05859\text{ K}^(-1)}\n\n & = & \text{41.0 K}\end{array}

3. Convert the temperature to Celsius

T = (41.0 - 273.15) °C = -232 °C

If a substance has a large mass and a small volume what can you conclude about it

Answers

I could conclude, based on that information, that the density of the substance is quite high.
You can conclude that the substance has a very high density! 

What are the main causes for seasons on earth?

Answers

As the earth turns one of the sides moves closer to the sun, creating summer in that area, at the same time the part of the earth on the other side moves farther away, hence making it colder and the season becomes winter
The tilt of the earth
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