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Tanya [424]
3 years ago
9

HELP

Chemistry
1 answer:
alisha [4.7K]3 years ago
4 0

Answer:

3.beta particle

4.d

5.b

6.c

Explanation:

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How many liters of 0.98 M have solution would react completely with 3.5 moles ca(oh)2
jasenka [17]

The question is typed wrong. Assuming the correct question is

How many liters of 0.98 M H2SO4 solution would react completely with 3.5 moles Ca(OH)2 ?

Answer:-

3.571 litres

Explanation:-

The balanced chemical equation for this reaction is

H2SO4 + Ca(OH)2 = CaSO4 + 2 H2O

From the balanced chemical equation we see that

1 mole of Ca(OH)2 reacts with 1 mol of H2SO4.

∴3.5 moles of Ca(OH)2 reacts with 1 x 3.5 / 1 = 3.5 mol of H2SO4.

Strength of H2SO4 = 0.98 M

Volume of H2SO4 required = Number of moles of H2SO4 / Strength of H2SO4

= 3.5 moles / 0.98 M

= 3.571 litre

8 0
4 years ago
At what substrate concentration would an enzyme with a K_cat of 30.0 s⁻¹ and a Km of 0.0050 M operate at one-quarter of its maxi
Umnica [9.8K]

Answer:

The correct answer is option B.

Explanation:

Michaelis–Menten 's equation:

v=V_{max}\times \frac{[S]}{(K_m+[S])}=k_{cat}[E_o]\times \frac{[S]}{(K_m+[S])}

V_{max}=k_{cat}[E_o]

v = rate of formation of products

[S] = Concatenation of substrate = ?

[K_m] = Michaelis constant

V_{max}= Maximum rate achieved

k_{cat} = Catalytic rate of the system

E_o = initial concentration of enzyme

We have :

v=\frac{V_{max}}{4}

[S] =?

K_m=0.0050 M

v=V_{max}\times \frac{[S]}{(K_m+[S])}

\frac{V_{max}}{4}=V_{max}\times \frac{[S]}{(0.0050 M+[S])}

[S]=\frac{0.005 M}{3}=1.7\times 10^{-3} M

So, the correct answer is option B.

8 0
3 years ago
Consider four elements from Group 7A: fluorine in the second period, chlorine in the third period, bromine in the fourth period,
lina2011 [118]
<span>Out of the possible answers for this question, fluorine in the second period is correct. Of the four elements fluorine, chlorine, bromine and iodine, fluorine has the largest first ionization energy, with a Enthalpy number of 1681.0. Of all the elements, helium has the highest first ionization energy figure.</span>
5 0
3 years ago
Sum of all forces acting on object is it a forces, unbalanced forces , balanced forces, net forces
malfutka [58]

Answer: The answer is Net Forces.

Net force is the vector sum of forces acting on a particle or body.

Have a great day!

8 0
4 years ago
Read 2 more answers
Can someone help ill give 30 extra points if its right
Harrizon [31]

Answer:

sweating

Explanation:

why do I need 20 words

3 0
3 years ago
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