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love history [14]
3 years ago
5

How many hydrogen atoms are there in 1.15 g of methane (CH4)?

Chemistry
1 answer:
Aleksandr [31]3 years ago
3 0
Real answer:

4 hydrogen atoms
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Calculate the density of a sample of gold if the sample has a volume of 48.9cm3 and a mass of 944.75 g
LekaFEV [45]

Answer:

19.3g/cm^3

Explanation:

Hey,

the formula for density is Mass/Volume so in this question you basically put the given things in the formula

D = M/V

D= 944.75/48.9

D= 19.3g/cm^3

7 0
3 years ago
Read 2 more answers
The compound calcium cyanamide (CaNCN) is used as a nitrogen source for crops. To obtain this compound, calcium carbide is react
fenix001 [56]
N2 + CaC2 = CaNCN + C 
<span>As you can see, 1 mol of N2 can react completely with 1 mol of CaC2 and 1 mol of CaNCN will be obtained </span>
<span>It means 5 mol of N2 can react completely with 5 mol of CaC2 and 5 mol of CaNCN will be obtained </span>

<span>So, there are 7.5 - 5 = 2.5 odd mole of CaC2 after the reaction </span>
<span>And the mass of obtained CaNCN is </span>
<span>m = n*M = 5*80 = 400g</span>
4 0
4 years ago
An isotope with a half life of 10 min and a starting sample size of 100 g would have
IgorC [24]

Answer:

12.5 gm left

Explanation:

30 minutes is THREE half lives

   1/2^3 = 1/8th   would be left

100g * 1/8 = 12.5 gm

7 0
2 years ago
Help me!!! Several small craters lie in the floor and on the walls of crater 2. Which is older,crater 2 or the smaller craters i
Zinaida [17]
Well, think of it this way. If you put a big paper circle on the ground, and then you put smaller circles on top of the big circle, which one would have been there longer? The big circle, of course. So the same logic applies here: if the smaller craters had been older than the big crater, then when the big crater was formed, the smaller ones would've been buried. Therefore, crater 2 is older than the smaller craters inside it.
Hope that helped! =)
6 0
3 years ago
Li₃N + 3 NH₄NO₃ 3 LiNO₃ + (NH₄)₃N
elena-s [515]
Double reaction is the answer
7 0
3 years ago
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