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s2008m [1.1K]
2 years ago
10

Explain why Earth has a tilt.

Chemistry
1 answer:
mylen [45]2 years ago
3 0

Answer:

It because it is on the axis

Explanation:

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The chemical equation below shows the burning of magnesium (Mg) with oxygen (O2) to form magnesium oxide (MgO). 2Mg + O2 Right a
Nadusha1986 [10]

Answer:

64.0

Explanation:

2Mg+O2 ---> 2MgO

use dimentional analysis to find the amount of moles of O2 needed first

4.00molMg x 1.00mol O2/ 2.00 mol Mg=. 2.00 mol O2

using the coefficients you can see the mole ratio for O2:Mg the mole ratio is 1:2 which is why there is 1 mole on the top for 2 moles on the bottom. The Mg would cancel and multiply 4 by 1 then divide by 2, or multipy 4 by 1/2

Now that you have the moles of O2 you use the molar mass to find the grams in 2 moles of O2

2.00 mol O2 x 32.0g/1.00 mol = 64.0 g

multiply 2 by 32

4 0
3 years ago
Heavy water is unstable because hydrigen is substituted by its isotope deuterium is it correct
NNADVOKAT [17]

Answer: yes

Explanation:Deuterium is a hydrogen isotope with a nucleus containing a neutron and a proton; the nucleus of a protactinium (normal hydrogen) atom consists of just a proton. ... The human body naturally contains deuterium equivalent to about five grams of heavy water, which is harmless.

8 0
3 years ago
At this pressure, how many molecules of air would there be in a 20 ∘C experimental chamber with a volume of 0.020 m3 ?
jonny [76]

Answer:

Explanation: The lowest pressure in a laboratory is 4.0×10^-11Pa

Using Ideal gas equation

PV = nRT

P= 4.0×10^-11Pa

V= 0.020m^3

T= 20+273= 293k

n=number of moles = m/A

Where m is the number of molecules and A is the Avogradro's number=6.02×10²³/mol

R=8.314J/(mol × K)

PV= m/A(RT)

4.0×10^-11 ×0.020 = m/6.02×10²³(8.314×293)

m = 4.0×10^-11×0.020×6.02×10^23 / (8.314×293)

m = 1.98×10^8 molecules

Therefore,the number of molecules is 1.98×10^8

8 0
3 years ago
Overflow during a heavy rainstorm from a wastewater treatment plant would result in
Vika [28.1K]

Answer: a.polluted runoff into nearby ponds

Explanation:

3 0
3 years ago
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How do the sizes of planets, solar system, galaxies, and the universe relate to one another
Usimov [2.4K]

Answer: they all relate to eachother

Explanation: every star every planet every sun its hard to belive they relate

to eachother but only becuase there in the same UNIVERSE

6 0
4 years ago
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