I need help with question 4 can y’all help me put them in the right spot Extra points !

Predict the missing component of each reaction. ? + 2NaBr → 2NaC1+Brz онСІ ch Na

EastWind [94]

Answer:

Cl2.

Explanation:

? + 2NaBr → 2NaC1l+ Br2

Note that the element Cl (chlorine) is missing from the left side.

The answer is Cl2 (to balance the equation it requires 2 Cl's).

5 0

3 years ago

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EASY Chemical reactions Balance and classify

Marat540 [252]

Answer:

double replacement

synthesis

double replacement

i think this one is decomposition

synthesis

double replacement

single replacement

double replacement

single replacement .....

hopefully i help

6 0

3 years ago

What experiment did Robert Millikan do?

scZoUnD [109]

I’m not sure it’s correct but I think it’s D) He used voltage adjustments to make charges oil drops float

7 0

4 years ago

Aly's science class was looking at bacteria through a microscope. Aly's teacher said some bacteria can be as small as 0.00365 cm

olga nikolaevna [1]

Answer:

$0.00365\ cm=3.65\times 10^{-3}\ cm$

Explanation:

Aly's teacher said some bacteria can be as small as 0.00365 cm long.

In this problem, we need to write the length of the bacteria written in scientific notation. Any number can be written in the form of scientific notation as follows :

$N=a\times 10^b$

a is a real no and b is an integer

In the given number, there are two zeroes before 3. We need to shift the decimal after 3. It can be done as follows :

$0.00365\ cm=3.65\times 10^{-3}\ cm$

Hence, this is the required solution.

8 0

3 years ago

The molecular weight of table salt, NaCl, is 58.5 g/mol. A tablespoon of salt weighs 6.37 grams. Calculate the number of moles o

cestrela7 [59]

Answer:

The number of moles of salt in one tablespoon is = 0.11 mole

Grams cancel each other.

Explanation:

Moles : It is the unit of quantity . It is the mass of the substance present in exactly 12g of C-12.

$moles=\frac{given\ mass}{Molar\ mass}$

Moles Calculation:

Given mass = 6.37 gram

Molar mass = 58.5 g/mol

$moles=\frac{6.37}{58.5}$

= 0.1088

= 0.11 mole

Units calculation

$moles=\frac{given\ mass}{Molar\ mass}$

$moles=\frac{g}{g/mole}$

$moles=\frac{g}{g}\times mole$

g ang g cancels each other

moles = moles

Hence unit = gram (g ) cancel each other.

3 0

3 years ago

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