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Crazy boy [7]
3 years ago
6

Someone please explain how to do this, i will give branliest and extra points!!!

Chemistry
1 answer:
Bad White [126]3 years ago
7 0

Answer:

Use the following equation: 2Mg + O2 → 2MgO

If 20 grams of MgO were produced, and the reaction used 15

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PLEASE HELP ME ASAP!! I NEED IT! NO LINKS
Natali [406]

Answer:

asexual cell

Explanation:there are mainly 2 types sexual and asexual i would say asexual because they grow without another parent and don't have a nucleus.

3 0
3 years ago
HClO4 acid solution has a concentration of 5 Molarity. Calculate the concentration of this solution in
Nutka1998 [239]

Answer:

1. Percentage by weight = 0.5023 = 50.23 %

2. molar fraction =0.153

Explanation:

We know that

Molar mass of HClO4 = 100.46 g/mol

So the mass of 5 Moles= 5 x 100.46

       Mass (m)= 5 x 100.46 = 502.3 g

Lets assume that aqueous solution of HClO4  and the density of solution is equal to density of water.

Given that concentration HClO4 is 5 M it means that it have 5 moles of HClO4 in 1000 ml.

We know that

Mass = density x volume

Mass of 1000 ml  solution = 1 x 1000 =1000     ( density = 1 gm/ml)

            m'=1000 g

1.

Percentage by weight = 502.3 /1000

Percentage by weight = 0.5023 = 50.23 %

2.

We know that

molar mass of water = 18 g/mol

mass of water in 1000 ml = 1000 - 502.3 g=497.9 g

So moles of water = 497.7 /18 mole

moles of water = 27.65 moles

So molar fraction = 5/(5+27.65)

molar fraction =0.153

6 0
3 years ago
Help me please.<br>List two properties of a material that you can observe using your senses
sasho [114]
Well I would guess the 5 common senses if thats what it is called like seeing hearing and stuff like that
5 0
3 years ago
New oceanic lithosphere forms as a result of
Oksana_A [137]

Answer:

A. sea-floor spreading.

Explanation:

The sea-floor spreading is the result of the new oceanic lithosphere

3 0
3 years ago
Read 2 more answers
Charles' equation keeps _______ constant.A. All of theseB. TemperatureC. VolumeD. Pressure
Rama09 [41]

Explanation:

Charles' Law can be stated as follows: At constant pressure, the volume of a given mass of gas varies proportionally with the value of its absolute temperature.

Answer: D. Pressure.

5 0
1 year ago
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