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IgorLugansk [536]
3 years ago
13

I dunno which one it is could someone help please?​

Chemistry
2 answers:
mars1129 [50]3 years ago
8 0
B. Photosynthesis

Oxygen and glucose make perfect energy for plants
alex41 [277]3 years ago
5 0

Answer: B. photosynthesis

Explanation: Glucose and oxygen react together in plant cells to produce energy.

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Choose three physical properties that can be used to identify pure substances. (select all that apply.) melting point degree of
ch4aika [34]
Malleable ductile and sonorous
5 0
3 years ago
PLEASE HELP ASAP
Mekhanik [1.2K]

The mass of magnesium, which has a density of 1.74 g/cm is 504.6 g.

<h3>What is mass?</h3>

Mass is the quantity of matter. Mass can be calculated by multiplying density by volume.

Magnesium is a chemical element with the atomic number 12. It is needed in the body in trace amounts. It can cause malnutrition in the body.

Mass = Density x volume

We know the density and the volume of magnesium.

Density = 1.74

Volume = 290

Density x volume

Putting the value in the equation

1.74 x 290 = 504.6 g

Thus, the mass of magnesium is 504.6 g.

To learn more about mass, refer to the below link:

brainly.com/question/22795877

#SPJ1

4 0
1 year ago
100 POINTS PLEASE HELP (PHOTOS INCLUDED)
pshichka [43]

Answer:

Explanation:

3.

Knowns: 100mL of solution; concentration of 0.7M

Unknown: number of moles

Equation: number of moles = volume * concentration

Plug and Chug: number of moles = 100/1000 * 0.7 = 0.07 mole

Final Answer: 0.07mole

2.

Knowns: 5.50L of solution; concentration of 0.400M

Unknown: number of moles

Equation: number of moles = volume * concentration

Plug and Chug: number of moles = 5.5 * 0.4 = 2.20 mole

Final Answer: 2.20 mole

6 0
2 years ago
Read 2 more answers
Which of these features of Earth's crust are caused by the shifting of tectonic plates?
KIM [24]
I’m pretty sure it’s A mid-ocean ridges
4 0
3 years ago
How do you know the number of valence electrons for those elements?​
salantis [7]

Answer:

For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.

Explanation:

hope this help

5 0
2 years ago
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