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Crazy boy [7]
3 years ago
8

2. Dilute hydrochloric acid reacts with zinc to form zinc chloride and hydrogen.

Mathematics
1 answer:
DIA [1.3K]3 years ago
6 0

Step-by-step explanation:

Zn + 2HCl => ZnCl2 + H2

Moles of Zn = 13g / (65.38g/mol) = 0.198mol

Volume of HCl = 0.396mol / (0.25mol/dm³) = 1.58dm³.

Volume of H2 = 0.198mol * (22.4dm³/mol) = 4.43dm³.

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The sum of 3 consecutive numbers is 126. Find the numbers.
anzhelika [568]

Answer:

Hello!!

The sum of 3 constructive numbers is 126. The three constructive numbers are...

41+42+43=126

Hope this helps!!

7 0
3 years ago
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The water level as a river recedes after a flood is measured at regular intervals, and its height relative to normal, in inches,
kicyunya [14]

Answer:

7th measurement = -26

Step-by-step explanation:

The sequence is 16, 9, 2, –5, ...,

First term( a)= 16

Second term=9

Common difference (d) = 9-16

Common difference= -7

The sequence is a arithmetic progression

For AP's ,the terms formula is

Term(n) = a + (n-1)d

Where n represent the term to be found

In this case,we Are looking for the 7th term , so n= 7

Term(7) = 16+ (7-1)-7

Term(7)= 16 +6(-7).

Term (7) = 16-42

Term(7) = -26

7th term =-26

4 0
3 years ago
find the length of the base of a square pyramid if the volume is 1,024 cubic inches and has a height of 12 inches
Tju [1.3M]
Let 's x the length of the pyramid:
V=x²*h/3
V=1024 and h=12
So x²*12/3=1024
==>x²=1024*3/12
==>x²=256
==>x²=16²
==> x=16 for (x=-16 must be exclude <0)

......brainpower pts pls
7 0
3 years ago
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A ticket to see your favorite baseball team costs $45.18. That price decreases by $0.23 for every game lost during the regular s
adell [148]

Answer:

The price after 33 loses would be 37.59

Step-by-step explanation:

8 0
3 years ago
Or<br> Solve for q.<br> 5 – 4q ≤ –3
netineya [11]

Answer:

q >= 2

Step-by-step explanation:

5 - 4(2) <= 3

5 - 8 <= 3

3 <= 3

5 0
3 years ago
Read 2 more answers
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