PLS ANSWER CORRECTLY 50 POINTS AND BRAINLIEST!!!
During an investigation, a scientist burned 48 g of magnesium strip. After the reaction, the total mass of the product formed was found to be 80 g. Does the law of conservation of mass hold true in this case? Use complete sentences to justify your answer based on numerical calculations.

Answer

yes

Explanation:

the law of conservation of mass hold true in this case burning magnesium strip is explained by this equation 2 Mg (s) + O2 (g) -> MgO (s)So the lighter magnesium, after reacting with oxygen in air, forms the heavier magnesium oxide. molar mass of magnesium and magnesium oxide are 24g and 40g respectively. So the same ratio 24:40 (i.e. 3:5) is maintained in the given masses of 48g and 80g, which means mass is conserved in the reacion.

1. The whole world is __________________ with rocks.
2. Rocks have / have never been melted or molten at some time.
3. Bubbles / Lines in some rock were formed by chemical reactions in the rock when cool.
4. Wind and ____________________ moving over the surface break rock down into sand.
5. Soil comes from ______________________ which comes from rocks.
6. Igneous rocks come from the word _____________________ meaning fire.
7. Sedimentary rock has layers because sand / boulders are washed downstream and settle on the bottom.
8. ____________________ rock is a combination of the other two and has changed into new rock.
9. Rock can change into sand and sand can then change into ________________ over many years.
10. ________________ in farmland has a lot of living things in the top layer or horizon.
11. A huge flood happened in Washington State when a(n) ___________________ broke.
12. Only water / several things can change the shape of the land.
13. Diamonds are the _________________ substance known to us.
14. Rocks are formed by wind, ________________ heat, and water and change from one type into another.
15. Sedimentary rocks are made from sand and _____________ compressed under heat and pressure.

HELPPPPPPP!!!!!!!!!!

What is the one or two letter character used to identify an element?

element symbol

chemical symbol

chemical name

atomic letters

Name 1 object that you would use the following types of measurements for; Mass, Volume and Density.

I need this by 8:30

Homeostasis means maintaining

Your answer:

varied internal conditions.


varied offspring.


similar offspring.


stable internal conditions.
plz help this for sience

Sahil watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. The ending substances did not look the same as the starting substances.Sahil was given a diagram with the repeating groups of atoms that make up the starting substances, plus information about the properties of the starting and ending substances. He created a model of the repeating groups of atoms that might make up the two ending substances.Does his model correctly show why the properties of the ending substances are different from the properties of the starting substances? Describe what could be correct or incorrect about his model.