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3 years ago

6

Elements may have similar properties and we can use the periodic table to help us determine what they are. These three elements

are alike in many ways but they do not share ALL properties. What property do these elements NOT have in common?

2 answers:

Reil [10]3 years ago

8 0

They don’t have the Noble gases

Vika [28.1K]3 years ago

7 0

Answer:

same number of valence electrons

Explanation:

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Sodium hydrogen carbonate , also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid ind

user100 [1]

Answer:

$3.8x10^{-1}gNaHCO_3$

Explanation:

Hello,

This is a typical case in which the following chemical reaction is carried out:

$HCl+NaHCO_3-->NaCl+H_2O+CO2$

Since 50 mL of a 0.091M solution of HCl is employed, we perform the shown below stoichiometric calculation to find the sodium hydrogen carbonate grams that must be ingested by the woman:

$m_{NaHCO_3}=0.050L*0.091\frac{molHCl}{L}*\frac{1molNaHCO_3}{1molHCl}*\frac{84gNaHCO_3}{1molNaHCO_3} =3.8x10^{-1}gNaHCO_3$

Best regards.

3 0

3 years ago

11.39g PbCl2(s) 200.0 ML<br> Solve for m

german

Answer:

j/l

Explanation:

7 0

3 years ago

What do u mean by change in state of matter?define it.<br>

ANEK [815]

Answer:

The mode of changing from one state of matter into another state and back to the former or original state is called change in state of matter .

hope it is helpful to you

7 0

3 years ago

Read 2 more answers

For a solution equimolar in HCN and NaCN, which statement is false? a. [H+] is larger than it would be if only the HCN were in s

balandron [24]

Answer:

option (d) is false.

Explanation:

Acid dissociation equilibrium of HCN is represented as-

$HCN\rightleftharpoons H^{+}+CN^{-}$

Acid dissociation constant, $K_{a}$ , is represented as-

$K_{a}=\frac{[H^{+}][CN^{-}]}{[HCN]}$

where species inside third bracket represents equilibrium concentrations of respective species

So, evidently, presence of excess $CN^{-}$ (or NaCN) in solution will combine with $H^{+}$ to produce HCN. Hence $H^{+}$ will be larger that it would be if only the HCN solution were present.

According to Le-chatlier principle, addition of HCN will shift equilibrium towards right and addition of NaCN will shift equilibrium towards left to keep constant $K_{a}$ value at a particular temperature.

NaOH gives acid-base reaction with HCN to produce NaCN and water. So, addition of NaOH will increase concentration of $CN^{-}$ and decrease concentration of HCN

6 0

3 years ago

3) How many grams are in 0.79 moles of HCI?<br> 1<br> UOL

snow_tiger [21]

Depending how you round and if you’re counting sig figs, it could be 28.8 or 29

3 0

3 years ago