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1 year ago

you have two samples of gray powder both which are flammable these are powders the same substance explain why

Chemistry

2 answers:

nasty-shy [4]1 year ago

7 0

The amount of matter stays the same between the substances,

Jet001 [13]1 year ago

5 0

Answer:it help in gravity

Explanation:

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If South America were not there, explain how the direction of South equatorial current would be different

forsale [732]

Explanation:

South America land mass serves as a deflector for the South equatorial current. This deflection the current causes them to move in a different direction. If the Continent were not present the direction of the South equatorial current would not change and it would continue to flow in the west.

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1 year ago

A student wants to form 2‑hexanol using acidic hydration. He finds four alkenes in the inventory cabinet that could be possible

julia-pushkina [17]

Answer:

Look on the picture.

Explanation:

He could find only 2 isomers of n-hexane alkenes for this reaction. Other two could be marked from other direction.

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2 years ago

Element X is found in two forms: 90.0% is an isotope that has a mass of 20.0, and 10.0% is an isotope that has a mass of 22.0. W

VMariaS [17]

$M_{X} = \frac{(20.0\cdot 90\%)+(22.0\cdot10\%)}{100\%} = \frac{2020}{100} = 20.2[u]$

answer: B

7 0

1 year ago

Using a good compound light microscope with a resolving power of 0.3 µm, a 10x ocular lens, and a 100x oil immersion lens, would

irina [24]

Answer : One <span>would be able to easily discern between two objects as they would be separated by all 4 distances as given in the question; because each one will be greater than or equal to the the resolving power of the compound light microscope.

Resolution means the separation between the two close images so, if we use a microscope with </span><span>0.3 µm, a 10x ocular lens, and a 100x oil immersion lens it will be able to resolve images which are greater of the given values.</span>

4 0

1 year ago

When 200g of AgNO3 solution mixes with 150 g of NaI solution, 2.93 g of AgI precipitates, and the temperature of the solution ri

gizmo_the_mogwai [7]

Answer:

$\Delta H=1962.3J$

Explanation:

Hello,

In this case, we can compute the change in the solution enthalpy by using the following formula:

$\Delta H=mC\Delta T$

Whereas the mass of the solution is 350 g, the specific heat capacity is 4.184 J/g °C and the change in the temperature is 1.34 °C, therefore, we obtain:

$\Delta H=350g*4.184\frac{J}{g\°C} *1.34\°C\\\\\Delta H=1962.3J$

It is important to notice that the mass is just 350 g that is the reacting amount and by means of the law of the conservation of mass, the total mass will remain constant, for that reason we compute the change in the enthalpy as shown above, which is positive due to the temperature raise.

Best regards.

8 0

2 years ago

you have two samples of gray powder both which are flammable these are powders the same substance explain why ​

you have two samples of gray powder both which are flammable these are powders the same substance explain why