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SOVA2 [1]
3 years ago
5

Can anyone help ? I’m sat packet for homework

Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
7 0
50 mph for 3 hours = 150 miles
70mph for 2.5 hours = 140 + 35 = 175

175 miles - 150 miles = 25 miles
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How much Zn and how much HCl should be used to produce 1.5 g ZnCl2
tatuchka [14]

Answer:

  • 0.71963 g of Zn
  • 0.80256 g of HCl

Step-by-step explanation:

The required mass of reactants can be computed from the number of moles of product.

  moles of ZnCl₂ = (1.5 g)/(136.282 g) ≈ 0.0110066 moles

Then the mass of Zn required is ...

  mass of Zn = (0.0110066 mol)(65.382 g/mol) = 0.71963 g

Two moles of HCl are used in the reaction with each mole of Zn, so the mass of HCl required is ...

  mass of HCl = 2(0.0110066 mol)(36.458 g/mol) = 0.80256 g

_____

<em>Comment</em>

The discrepancy in the last two decimal places of the weights above versus the calculator output below comes from rounding of moles of Zn to 4 significant digits, instead of 5 or more. The number of moles of ZnCl₂ is closer to 0.0110066.

4 0
3 years ago
Kareem cannot decide which of two washing machines to buy. The selling price of each is ​$650. The first is marked down by ​40%.
gregori [183]
Each washing machine is $390 and the first washing machine is better because its marked down all the way in stead of a discount, meaning that the tax will be lower (I think)
4 0
3 years ago
The first one is brainlyist
bearhunter [10]

Answer:

Step-by-step explanation:

6 0
2 years ago
Use the least common denominator to write an equivalent fraction for each fraction for 5/9 and 2/15
Masteriza [31]
75/135 and 18/135
just times 9 and 15, 9 and 2, and then 15 and 5
8 0
3 years ago
Find the jacobian of the transformation. x = 6v + 6w2, y = 8w + 8u2, z = 2u + 2v2
V125BC [204]
The answer for that problem is z =12+6
4 0
3 years ago
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