The reaction Na3PO4 + 3HCl → 3NaCl + H3PO4 produces 42.7 g of NaCl. How many grams of Na3PO4 are needed?

The time elapsed when the ball placed above the concave mirror and the image formed would be at the same location is 0.55 s.

The position of the image formed is determined using the followimg mirror formula;

[tex]\frac{1}{f} = \frac{1}{v} + \frac{1}{u}[/tex]

where;

f = R/2

f = 1.5/2

f = 0.75 m

When the ball and its image is in the same position, u = v

The position of the ball is calculated as;

[tex]\frac{1}{f} = \frac{1}{u} + \frac{1}{u} \\\\\frac{1}{f} = \frac{2}{u} \\\\u = 2f\\\\u = 2(0.75)\\\\u = 1.5 \ m[/tex]

The time taken for the ball to travel the caluclated distance is determined as;

h = ut + ¹/₂gt²

1.5 = 0  + ¹/₂(9.8)t²

1.5 = 4.9t²

t² = 1.5/4.9

t² = 0.306

t = 0.55 s

Thus, the time elapsed when the ball and its image are at the same location is 0.55 s.

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Answer:

its prob B since thats the system that protects the body from harmful substances

Explanation:

Answer:

B since that's the system that protects the body from harmful substances.

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Answer:

Renewable sources are something that can be renewed like
Plants
Trees
etc
uh

Explanation:

Non-renewable for example is you cant renew them at all
there built by the earth themselfs
Like
cole
gemstone
Steel

Metal
etc

How to pay taxes I MEAN

Answer:

Magnalium is stronger than aluminium alone but still has a low density.

Explanation:

Soil nutrients are minerals which are required for growth either small or relatively large quantities

Soil minerals are the metallic and non-metallic nutrients found in the soil which are required by plants for growth.

Based on plants requirements, the major nutrients are nitrogen, phosphorus and potassium.

Plants also require other nutrients like copper, zinc, sulfur, iron, etc., in smaller quantities.

Based on the results of the soil test:

The deficiencies and excesses can be corrected by selectively reducing the application of the excess soil nutrients and addition of the deficient nutrients.

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Answer:

37.5 moles of O2 needed

Explanation:

2 moles of  C6H6   need   15 moles of O2

5/2  * 15 = 37.5   of O2 needed

Answer:

compound

Explanation:

because h is hydrogen, then O is oxygen

Answer:

At home, a water hammer may occur when a dishwasher, washing machine or toilet shuts off water flow. The result may be heard as a loud bang or repetitive banging since the shock wave travels back and forth in the plumbing system.

Explanation:

[tex]\longmapsto\: \green{ hello \: mate \: }[/tex]

Atomic weight of nitrogen is 23

Answer:

1043.5 g of air  to the nearest tenth.

Explanation:

4P + 5O2 ---> 2P2O5

4*31 g P reacts with 5*32 g oxygen

124 g   ..   ..   .   ....  .   160g oxygen

186 g   ..   ..   ..   ..   ..   (160*186)/124 g oxygen

-  so the mass of air required =  [(160*186)/124] / 0.23

= 240 / 0.23

= 1043.5 g of air.

Answer:

im guessing its A run off

Explanation:

Answer: Run off

Explanation:

Wetlands have plants that clean water through. As water flows into a wetland it encounters the the plants growing there. This slows the water down making it less likely to cause erosion. The nutrient pollutants nitrogen and phosphorus are absorbed by the roots of the plants.

Answer:

A

Explanation:

1.0 L * 4 = 4L volume that the gas can occupy at 100 degree Celsius

Answer:

Specific heat is an intensive property (like density, color, etc.) that does not depend on the amount of a substance present. This allows substances to be identified using their specific heat. Imagine an unknown metal of known mass is heated to a known temperature.

Explanation:

Answer:

28.83dm³

Explanation:

Using ideal gas equation

PV=nRT

P=2.80atm

n=2.30

R=0.082

T=155°C (155+273=428Kelvin)

V=nRT/P

V=2.30×0.082×428/2.80

V=28.83dm³

Answer:

car hornsss

Explanation:

they loud asl

Answer:

what I don't understand anymore JJ is the best thing I think it's help with that I hope it's a pako I will be there in about a

The electronegativity of carbon is about 2.5 , and that of oxygen is about 3.5 , and naturally, (3.5−2.5=1.0)>0 . So, the electronegativity difference is greater for a C−O single bond than a F−F single bond.

Answer:

1.0

I hope my answer helps you.

Answer:

n S = 60 32 = 1.875 , n_S=\tfrac{60}{32}=1.875, nS=3260=1.875, n O = 40 16 = 2.5.

Explanation:

Answer:

270 g of water

Explanation:

Answer:

F is correct

Explanation:

When an atom or group of atoms" has more protons than electrons",it is positively charged. An atom or group of atoms that has the same number of protons and electrons is neutrally charged.

Answer: If an object that has an excess of positive electrons it is a positively charged object.

For a gas made up of homonuclear diatomic molecules escapes through a pinhole 0.378 times as fast as He gas, the chemical formula of the gas  is mathematically given as

N2(nitrogen gas)

Generally, the equation for the rate to molar relationship  is mathematically given as

\frac{r1}{r2}=\frac{mm2}{mm1}

Thereofore

\frac{r}{r2}=0.378

Hence

0.378=\sqrt{\frac{4.00268}{Mx2}}

Mx2=28.013g/mol

In conclusion,The name of gas with a molar mass of 28.013g/mol is N2

Therefore, the chemical formula of the gas. is N2

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Answer:

22.25 °C

Explanation:

Determine the final temperature when a 25.0 g piece of iron at 85.0 °C is placed into 75.0 grams of water at 20.0 °C.

Answer:

[tex]p= \frac{F}{A} = \frac{ 14.7 }{0.00482} = 3050 \: Pa[/tex]

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Actually Welcome to the concept of Physical chemistry, and Stochiometry.

So we balance the equation as,

2Na + Cl2 ===> 2NaCl

The required reaction is as:

2Na+ Cl2 = 2NaCl

2 moles Na = 2×23 g = 46g,1 mole Cl2 = 2×35.5g=71g

Now,71g Cl2 reacts with 46g Na,

Therefore, 67.2g Cl2 reacts with 46×67.2/71= 43.54g Name

The rest Na = (55–43.54)g=11.46g

That means Cl2 is a limiting reactant.

Again,2 moles NaCl=2(23+35.5)g=117g

Then,71g Cl2 produce 117g NaCl

Therefore,67.2g Cl2 produce 117×67.2/71 = 110.74g NaCl

hence the correct option is, b.) 111 g NaCl

Answer:

Matter is made-up of minute particles. Minute particles of matter have space between them.

So, when common salt is added to water, the particles of salt get into the space between particles of water.

Hence, common salt (Table salt) dissolves in water.