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vredina [299]
3 years ago
10

What volume of H2O is formed at stp when 6.0g of Al is treated with excess NaOH? NaOH + Al + H2O —-> NaAl(OH)4 + H2 (g)

Chemistry
1 answer:
ioda3 years ago
8 0

this is the formula and answer of this question

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How many liters of 1.75 M solution could be made using 35 grams of NaCl?
dolphi86 [110]
Data:
M (molarity) = 1.75 M (mol/L)
m (mass) = 35 g
MM (molar Mass) of NaCl = 58.44 g/mol
V (volume) = ? (in liters)

Formula:
M =  \frac{m}{MM*V}

Solving:
M = \frac{m}{MM*V}
1.75 =  \frac{35}{58.44*V}
1.75*58.44V = 35
102.27V = 35
V =  \frac{35}{102.27}
\boxed{\boxed{V \approx 0.34\:L}}\end{array}}\qquad\quad\checkmark
3 0
3 years ago
How many grams of sodium Phosphate is needed to prepare 5.0 L of a 2.6M solution ?
Diano4ka-milaya [45]

Molarity is the ratio of the moles and the volume. The mass of 2.6 M sodium phosphate solution is 2131.22 gms.

<h3>What is mass?</h3>

Mass is the product of the moles and the molar mass of the substance. It is given as,

Mass = Moles × Molar mass

The moles from molar concentration is used to calculate mass as:

Mass = Molarity × volume × molar mass

= 2.6 × 5.0 × 163.94

= 2131.22 gms

Therefore, 2131.22 gms is the mass of sodium phosphate.

Learn more about mass here:

brainly.com/question/9829994

#SPJ1

6 0
2 years ago
How much would a 50-kg object weigh on Mercury (gravity on Mercury is 3.59 m/s2)?
Andreyy89
Gravitational<span> Acceleration or W=Mg so... Q1: W(earth)=</span>50, W(X)=500 ---> g(X)=10<span>*g(earth)=10*9.8=98 --> C is correct. Q2: </span>M<span>=W/g --> </span>M=735/9.8=75 ---> B is correct. Q3: W=Mg=50*3.59<span>=179.5 N ---> B is correct</span>
4 0
3 years ago
If a machine decreases the distance an object moves, it must also _____.
mart [117]

increase the force needed to move the object

Explanation:

If a machine decreases the distance an object moves, it must also increase the force need to move the object.

A machine is a device that is used to do work with a little energy input.

  Work done = force x distance

We see that to do more work, a lot of force must be applied to move a body through a greater distance.

If the distance is reduced;  

      Distance = \frac{Work done {force}

More force must be applied to measure up for the distance and make the machine more efficient.

learn more:

Work done brainly.com/question/9100769

#learnwithBrainly

 

3 0
3 years ago
Any body help me? please Q 17
iVinArrow [24]

Question 17

 The subscript  2  is the  atomic number   for helium  and subscript  4  is the mass   number for Helium


 <u><em>explanation</em></u>

  when  writing   down  an isotope  of   an  element the mass  number of that isotope  is written  in upper   side  of the chemical  symbol,  while atomic  number  is written  on the  lower  side.

Since 4  is on upper side it is the mass  number of He, while 2  is  the atomic  number since  it is  on lower side.


Question 18

The type of radiation  emitted  when polonium -212  form lead 208  is  an alpha  particle


<u><em>explanation</em></u>

Alpha  decay  is a decay in which  an  atomic  nuclei  emit an alpha  particles and be transformed  into different atomic  nuclei  with    a mass  number that is  reduced by 4

polonium  212  is reduced by 4  to  form lead 208  therefore it undergo  alpha  particle  decay.

8 0
3 years ago
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