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vagabundo [1.1K]
3 years ago
5

26 Classify each chemical equation as a combination/synthesis, decomposition, single replacement, double replacement, or combust

ion. 
 
• Pb(s) + Hg2SO4(s)  PbSO4(s) +2 Hg(l)
•  NaCl(aq) + AgNO3(aq)  AgCl(s) + NaNO3(aq)
• 2 H20(l)2 H2(g) + 02(g)
Chemistry
2 answers:
eimsori [14]3 years ago
7 0
1. Single replacement
2. Double replacement
3. Decomposition
romanna [79]3 years ago
3 0

double replacement: is the answer on E.D.G


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Frank has a sample of steel that weighs 80 grams. If the density of his sample of steel is 8 g/cm3 ,what is the samples volume?
kirill115 [55]

Answer: 10 cm3

Explanation:

Mass of sample of steel (m) = 80 grams

density of sample of steel (p) = 8 g/cm3 samples volume (v) = ?

Since density is obtained by dividing mass by volume, the density of the steel sample is expressed as:

density = mass / volume

p = m / v

make v the subject formula

v = m / p

v = 80 grams / 8 g/cm3

v = 10 cm3

Thus, the samples volume is 10 cm3

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PRACTICE PROBLEMS
Likurg_2 [28]
72.6g
The density formula is density equal mass divided by volume (d=m/v) to solve this you must get the mass by itself. You do this by multiply volume on both sides which then gets you density times volume equal mass. Then you can plug in the numbers which is 1.20g/mL x 60.5 mL the mL cancels out which leaves you with grams and thus you have 72.6g.
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What is the Domain with four kingdoms or organisms that have cells with nuclei?
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Wym kingdom? I dont get it

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3 years ago
Calculate the reaction quotient Qp for the following redox reaction: 14H+ + Cr2O72- + 6Cl- ----> 2Cr3+ + 3Cl2 + 7H2O The reac
stich3 [128]

Answer:

Value of Q_{p} for the given redox reaction is 1.0\times 10^{-8}

Explanation:

Redox reaction with states of species:

14H^{+}(aq.)+Cr_{2}O_{7}^{2-}(aq.)+6Cl^{-}(aq.)\rightarrow 2Cr^{3+}(aq.)+3Cl_{2}(g)+7H_{2}O(l)

Reaction quotient for this redox reaction:

Q_{p}=\frac{[Cr^{3+}]^{2}.P_{Cl_{2}}^{3}}{[H^{+}]^{14}.[Cr_{2}O_{7}^{2-}].[Cl^{-}]^{6}}

Species inside third braket represent concentration in molarity, P represent pressure in atm and concentration of H_{2}O is taken as 1 due to the fact that H_{2}O is a pure liquid.

pH=-log[H^{+}]

So, [H^{+}]=10^{-pH}

Plug in all the given values in the equation of Q_{p}:

Q_{p}=\frac{(0.10)^{2}\times (0.010)^{3}}{(10^{-0.0})^{14}\times (1.0)\times (1.0)^{6}}=1.0\times 10^{-8}

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3 years ago
Is garlic powder a pure substance
CaHeK987 [17]

Answer: most store-bought isnt

Explanation:

there typically a lot of addivitves

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3 years ago
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