3 years ago

Which organelle's function is CORRECTLY described?

Chemistry

2 answers:

Firdavs [7]3 years ago

8 0

The correct answer is C

laiz [17]3 years ago

7 0

The correct answer is c.

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U have a lead ball with a mass of 420 g. The density of lead is 10.5 g/cm3. What is

salantis [7]

Answer:

40 cm^3

Explanation:

10.5 = 420 / x

x= 40

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3 years ago

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The reaction Ni(s) + S(s) --> NIS(s) is an example of which type of reaction?

algol [13]

?????????????????????????.

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3 years ago

the chemical compound C2F4 is used to make PTEE (Teflon). How manyC2F4 molecules are in 485 kilograms of this material?

monitta

Answer:

$molecules=2.92x10^{27}moleculesC_2F_4$

Explanation:

Hello,

In this case, we use the Avogadro's number to compute the molecules of C2F4 whose molar mass is 100 g/mol contained in a 485-kg sample as shown below:

$molecules=485kgC_2F_4*\frac{1000gC_2F_4}{1kgC_2F_4} *\frac{1molC_2F_4}{100gC_2F_4}*\frac{6.022x10^{23}molecules C_2F_4}{1molC_2F_4} \\\\molecules=2.92x10^{27}moleculesC_2F_4$

Best regards,

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3 years ago

Hydrogen ion reacts with zinc to produce_____ gas?

WINSTONCH [101]

▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓

Hydrogen ion reacts with zinc to produce $\:\pmb{\underline{\red{\sf{Zinc \:hydride }}}}\:$ gas

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6 0

3 years ago

Help me ASAP !!!!!!! Please give me some qestions for calculating number of moles

Leya [2.2K]

If your talking about mole. p

1 mole of water weighs 18 g

Therefore 0.5 mole of water weighs 9 g

According to Avagadro,

1 mol = 6.023 **10^23

atoms

So,

0.5 mol = 3.0115 **10^23

molecules of water

Each water molecule contains 2 hydrogen atoms .

Therefore

2** 3.00115**10^23

atoms of hydrogen are present in 9g of water

Answer:

The answer is

6.02⋅1023

3 0

3 years ago