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Nat2105 [25]
3 years ago
9

Hello detective doge here i am kinda bored wondering if anyone has any detective work for me

Chemistry
2 answers:
stich3 [128]3 years ago
6 0

Answer:

sure lol

Explanation:

leonid [27]3 years ago
4 0
Homework sucks and my teachers giving me more what should i do
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The density of solid cu is 8.96 g/cm3. how many atoms are present per cubic centimeter of cu?
svp [43]
Since there is 9.47 x 1021 atoms of copper in 1 gram, and 8.96 grams/cc is the density of copper, then 9.47 x 8.96 =84.85 x 1021 atoms of copper in the one cubic centimeter of copper.
3 0
3 years ago
How many grams of ammonia must you start with to make 900.00 l of a 0.140 m aqueous solution of nitric acid? assume all the reac
bogdanovich [222]
You need the set of reactions that goes from ammonia to nitric acid.
<span>
1) 4NH3(g)+5O2(g)-->4NO(g)+6H2O(g)

2) 2NO(g)+O2(g)-->2NO2(g)

3) 3NO2(g)+H2O(l)-->2HNO3(aq)+NO(g)

State the ratio of moles of HNO3 to NH3:

4 moles of NH3 produce 4 mole of NO,

4 moles of NO produce 4 moles of NO2

4 moles of NO2 produce 4 * (2 / 3) moles of HNO3 = 8/3 moles of HNO3.

=> (8/3) moles HNO3 : 4 moles NH3

Calculate the number of moles of HNO3 in 900.00 l of 0.140 M solution

M = n / V => n = M * V = 0.140 M * 900.00 liter = 126 moles HNO3

Use proportions:

(</span><span>8/3) moles HNO3 / 4 moles NH3 = 126 moles HNO3 / x

=> x = 126 moles HNO3 * 4 moles NH3 / (8/3 moles HNO3) = 189 moles NH3

Convert moles to grams:

molar mass NH3 = 14 g/mol + 3 * 1g/mol = 17 g/mol

mass in grams = number of moles * molar mass = 189 moles * 17 g/mol = 3213 g

Answer: 3213 g.
</span>
3 0
3 years ago
Magnesium (Mg) has nine electrons. Which of the following shows the correct electron configuration for an atom of Mg?
lubasha [3.4K]

Answer:last one

Explanation:

6 0
3 years ago
400 cm^3 =<br> L (Given: 1 cm^3 = 1 mL)
olga55 [171]

Answer:

1 cm^3 = 1 mL

Then

400 cm^3 = 400mL

Now convert mL to L

400/1000

0.4liter

7 0
3 years ago
A Which landmasses show evidence of ancient glaciers?
OLga [1]

Answer:

Continental drift– the theory that the continents are moving very slowly.Fossil– the remains, traces, or imprint of an ancient living thing preserved in rock.Glacier– a large, slowly moving body of snow and ice.Ice age– a time when Earth was very cold and large areas were covered by glaciers.Landmass– a large, unbroken ...

Explanation:

6 0
3 years ago
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