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love history [14]
3 years ago
13

A fixed, single pulley that is used to lift a block does which one of the following?

Chemistry
2 answers:
olga55 [171]3 years ago
4 0
The answer is C, it makes the block easier to lift by changing the direction of the force needed to lift it 
Illusion [34]3 years ago
3 0
The answer is C. I'm sure it is
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There are two open cans of soda on the table.one can was just taken from the refrigerator and the other was taken from the cupbo
larisa [96]
The one in the cupbard looses its CO2 first as its warmer so its solution has a lower solibility to the CO2 gas 

at lower temperatures the CO2 has less energy to escape from the solution of soda as CO2 in a solution is unstable it wants to be released 

hope that helps <span />
3 0
3 years ago
37.2 moles of hydrogen gas would have what mass?<br> Your answer
raketka [301]

Answer:

74.99g

Explanation:

Mass of a substance can be calculated by using the formula;

mole = mass ÷ molar mass

mass = molar mass × mole

According to this question, 37.2 moles of hydrogen gas is given.

Molar mass of hydrogen gas (H2) = 1.008(2) = 2.016g/mol

mass = 2.016 × 37.2

Mass of H2 = 74.995

Mass = 74.99g

5 0
2 years ago
A) Suggest one possible reason for the general trend indicated on the graph between 1910 and 2000.?
matrenka [14]
One possible reason for the general tread could be the rise in population and the need to sustain oil production for items and objects dependent upon oil or creation or operation. 

It may be sustainable due do the dependence on oil already... Yet could change at any minute due to the use of anything new. 

Well, becoming more ecological in nature. Using less plastic and recycling more, getting off of conventional cars, getting more educated about even more techniques. 

I hope that may help, if not, just tell me. :D 
8 0
3 years ago
Read 2 more answers
How many moles of xenon trioxide are present in 1. 69 grams of this compound.
Vadim26 [7]

Answer:

0.00944

Explanation:

Xenon mass number on the periodic table: 131.29

Oxygen mass number: 16.00

Add them to find the molar mass of xenon trioxide: 131.29+3(16) = 179.29g/mol

Convert this to moles

1.69g * \frac{mol}{179.29g} = 0.00944mol

3 0
2 years ago
What is a key element found in CO2 and glucose?
hram777 [196]
Carbon is the only possible solution in this question for the reason that the chemical formula for glucose is c6h12o6 (6, 12 and 6 underscore) and carbon dioxide is co2. Both of the chemical formula contains carbon that is why that is the main element. 
8 0
3 years ago
Read 2 more answers
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