2 years ago

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Chemistry

2 answers:

Leni [432]2 years ago

7 0

Answer:

Um what

Explanation:

There is no danger

azamat2 years ago

5 0

For part 1, just copy them off of the periodic table. For example, element 1 is Hydrogen, and its symbol is H

Elements on the left usually lose electrons and elements on the right tend to gain them. Noble gases have no charge.

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Magnesium oxide (MgO) forms when the metal burns in air. (a) If 1-25 9 of MgO contains 0.754 g of Mg, what is the mass ratio of

Vsevolod [243]

Answer:

Explanation:

a )

1.25 g MgO contains .754 g of Mg .Rest will be O

so oxide = 1.25 - .754 = 0.496 g

ratio of magnesium to oxide = .754/.496 = 1.52

b) 1.25 g of MgO contains .754 g of Mg

534 g of MgO contains .754 x 534 / 1.25 g = 322.11 g

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2 years ago

Explain heat transfer in your own words

timofeeve [1]

Answer: thermal conductivity

Explanation:

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3 years ago

if the half-life of substance A is 1.5 years, how long would it take a 8.0 gram sample of substance A to decay such that only 1.

Fudgin [204]

Answer:

4.5

Explanation:

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3 years ago

BRAINLIESTTT ASAP!!! PLEASE HELP ME :)

Nady [450]

copper (ll) oxide

addition of Cu²+ and O²-

ionic bond

4 0

3 years ago

3. What was the temperature in

Alexeev081 [22]

Q = mcΔT

m = 75 g
c = 4.25 J/gram°C
q = 2450 J

q/mc = ΔT

2450/(75 • 4.25) = 7.7°C

The temperature increased by 7.7°C.

6 0

2 years ago

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