Answer:
1.85 g of hydrogen gas will form!
Explanation:
1. Write the balanced equation.
Zn
+
2HCl
→
ZnCl
2
+
H
2
2. Calculate the moles of
Zn
.
Moles of Zn
=
30.0
g Zn
×
1 mol Zn
65.38
g Zn
=
0.4589 mol Zn
3. Calculate the moles of
H
2
.
Moles of H
2
=
0.4589
mol Zn
×
2 mol H
2
1
mol Zn
=
0.9177 mol H
2
4. Calculate the mass of
H
2
.
Mass of H
2
=
0.9177
mol H
2
×
2.016 g H
2
1
mol H
2
=
1.85 g H
2
Which scientist first applied DNA Analysis techniques to crime scene evidence?
a)Tommy Lee Andrews
b)Colin Pitchfork
c)Stephen Jones
d)Alec Jeffreys
A buffer solution must contain: Select one: a relatively high amount of both an acid and its conjugate base dissolved in water a relatively high amount of the conjugate base dissolved in water a solution that is at pH 7 a relatively high amount of a weak acid dissolved in water a solution that does not contain water
A buffer solution must contain relatively high amount of both an acid and its conjugate base dissolved in water.
What is a Buffer Solution?A buffer solutrion is a soltion that contains appreciable amounts of a
A mixture of a weak acid and its conjugate base A mixture of a weak base and its conjugate acidweak conjugate acid-base pairBuffer solutions resist any small change in pH when small amounts of a strong acid or a strong base are added
Examples of a buffer solution is
The solution of acetic acid and sodium acetate (CH3COOH + CH3COONa),this contains a weak acid and its salt.The solution of ammonia and ammonium chloride (NH3(aq) + NH4Cl(aq), This contains a weak base and its salt.Learn more here on Buffer solution:https://brainly.com/question/10643807
Calculate the poh of this solution. round to the nearest hundredth. ph = 1.90 poh =
Answer:
10.25
Explanation:
There I proved it
Answer:
pOH = 12.10
Explanation:
pOH = 14 - pH = 14 - 1.90 = 12.10
A mixture of heptane (bp 98oC) and 1-propanol (bp 97oC) is not fully resolved using SE-30 as the stationary phase, but is easily separated using a column of DEGS. Explain with your own words.
A mixture of heptane and 1-propanol easily dissolved using DEGS because diethylene glycol sussinate (C8H14O6) 1 propanol easily dilutes and retain surface.
What is mixture?Generally, a mixture speaks to the joining of two different substance in other to achieve a different substance or something combining or becoming matched.
In conclusion, SE-30 is neutral in nature, DEGs is a stationary phase containing a non-volatile liquid phase. It also includes polar group OH types,
Hence, using Hydrogen bonding it can easily bind 1-propanol.
Read more about Element
https://brainly.com/question/2143004
What is the brown liquid for that the grasshopper may “spit” out?
Answer:
It is called "tobacco juice"
Explanation:
When a grasshopper is picked up they spit the brownish liquid known as "tobacco juice." They use it as some sort of defense mechanism to protect them from attacks by predators.
Hope this helps:)...if not then sorry for wasting your time and may God bless you:)
write any two conditions due to which demagnetization occur
Answer:
1) because of heating
2) because of hammering
Can anyone help me please
Explanation:
The Animal meat contains Vitamins, proteins and carbohydrates and many more,
The other food group includes various minerals, (like copper, Calcium, Sodium, Phosphorus, selenium, cobalt, iron, zinc etc) various Amino acids, Fatty acids, water and albumin
The sources of vitamin like B12 are animals, and vegetarian should consume plant based supplements to fulfill the need of essential macromolecules!
[Side note: Meat consumption is secondary cause of increasing global warming Go vegan!]
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What is the 2nd step in the process of natural selection?
Answer: Selection proper
Explanation:
it's an anti-chance process, but subject to many constraints
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