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DENIUS [597]
3 years ago
9

The rare earth elements include A. the actinide series and the alkaline earth metals. B. the alkali metals and the transition me

tals. C. the lanthanide series and the actinide series. D. the lanthanide series and the alkali metals.
Chemistry
1 answer:
kolezko [41]3 years ago
8 0
The answer is A because Alkaline are gases in earth's atmosphere <span />
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H E L P <br> P L E A S E<br> ;-;
aleksandr82 [10.1K]

Answer:

because it decompose

Explanation:

yeast is an organic compound

7 0
2 years ago
Which of the following is a double replacement reaction?
Gekata [30.6K]

Answer:

The answer to your question is: letter D.

Explanation:

Double replacement reaction is when the cation of one reactant replaces the metal of the other reactant and vice versa.

a. 2SO2 + O2 —> 2S03                          This is a combination reaction

b. Zn + Cu(NO3)2 → Zn(NO3)2 + Cu      This is a single replacement reaction.

c. 2H2O2–> 2H2O + O2                         This is a decomposition reaction

d . AgNO3 + NaCl → AgCl + NaNO3      This is a double replacement reaction

7 0
3 years ago
If 10.62 mL of a standard 0.3330 M KOH solution reacts with 98.20 mL of CH3COOH solution, what is the molarity of the acid solut
Nikolay [14]

Answer:

0.036 M of CH_{3} COOH

Explanation:

It is an example of acid-base neutralization reaction.

KOH  + CH_{3} COOH  ----> CH_{3} COO^{-} K^{+}   +   H_{2}O

Base           Acid                           Salt                                    

When two component react then the number of moles of both the component should be same, therefore the number of moles and acids and bases should be the same in the following .

Molarity= \frac{\textrm{No. of Moles}}{\textrm{Volume of the Particular Solution}}

No.of moles= Molarity × Volume of the Particular Solution

Therefore,

M_{1}V_{1} =M_{2}V_{2}------------------------------(1)

where

M_{1}= Molarity of Acid

V_{1}= Volume of Acid

M_{2}= Molarity of Base

V_{2}= Volume of Base

M_{1}=0.3330 M

V_{1}=10.62 mL

V_{2}=98.2 mL

M_{2}=??(in M)

Plugging in Equation 1,

0.3330 × 10.62 =M_{2}  × 98.2  

M_{2}=\frac{0.3330*10.62}{98.2}

M_{2}=0.036 M

3 0
2 years ago
Which metal is more active than tin, but less active than zinc
VikaD [51]

Answer:

Iron (Fe)

Explanation:

The reactivity series shows a series of metals reactivity from lowest to highest. Based on the arrangement of metals in the reactivity series, iron is placed above tin and below zinc, this means that iron is more reactive than tin but less reactive than zinc. This means that iron would displace tin ions in a solution whereas zinc would displace iron ions in a solution.

The reactivity of metals is due to the stability of metals in their electron configurations as atoms and as ions.

8 0
2 years ago
URGENT PLEASE HELP!!
Orlov [11]

Answer:

Liters per second is 0.2 LPS

Liters per hour is 720

Explanation:

Divide the litres by the time, than multiply the time of an hour (in seconds) and than multiply the lps by time of an hour in seconds.

3 0
2 years ago
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