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Sidana [21]
2 years ago
12

HELPPP

Chemistry
1 answer:
Ksivusya [100]2 years ago
4 0
3 I’m pretty sure maybe
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Which of these is a physical property
Mariulka [41]

Answer:The purpose of the Morrill Land Grant Act and the Homestead Act.

Began agriculture and mechanical colleges, homestead act to create farms for a small fee to help with the food shortage during the civil war.

A.boiling point

B.flamability

C. Reactivity

D.toxicity answer is B Explanation:

3 0
2 years ago
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What is the correct answer?
avanturin [10]
Because light travels faster than sound
6 0
3 years ago
A small windmill is to be built at a science competition. A large floor fan is used to power each windmill The task
fredd [130]

Answer:

D

Explanation:

I'm doing USA test prep and I got it right

7 0
3 years ago
What is the molar mass of a compound if 25.0 g of the compound dissolved in 750. Ml gives a molarity of 0.290 m?
wlad13 [49]

Answer:

115g/mol

Explanation:

To get the molar mass, we know that the it is equal to the mass divided by the number of moles. We have the mass but we do not have the number of moles.

We get this by working through the solution information. Firstly, we need to know the number of moles in 750ml for a molarity of 0.29m

Now, since 0.29 moles is present in 1000ml, x moles will be present in 750ml

The value of x is obtained as follows:

x = (750 * 0.29)/1000 = 0.2175 moles

Now since we have the number of moles, we can then obtain the molar mass.

Molar mass = mass/number of moles = 25.0g/0.2175 = 114.94 approximately 105g/mol

6 0
3 years ago
Which of the following represents the least number of molecues?
Mars2501 [29]

Answer:

Answer: a) 20g of H2O (18.02 g/mol) molecules=6.68x10^23

Explanation:

In order to find the amount of molecules of each of the options, we need to follow the following equation.

molecules=\frac{mass(g)x6.022x10^{23}(molecules/mol) }{atomic weight(g/mol)}

So, let´s get the number of molecules for each of the options.

a) molecules=\frac{20(g)x6.022x10^{23}(molecules/mol) }{18.02(g/mol)}=6.68x10^{23}molecules

b) molecules=\frac{77(g)x6.022x10^{23}(molecules/mol) }{16.06(g/mol)}=2.89x10^{24}molecules

c) molecules=\frac{68(g)x6.022x10^{23}(molecules/mol) }{42.09(g/mol)}=9.73x10^{23}molecules

d) molecules=\frac{100(g)x6.022x10^{23}(molecules/mol) }{44.02(g/mol)}=1.37x10^{24}molecules

d) molecules=\frac{84(g)x6.022x10^{23}(molecules/mol) }{20.01(g/mol)}=2.53x10^{24}molecules

the smalest number is in option a)

Best of luck.

7 0
2 years ago
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