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myrzilka [38]
3 years ago
5

Please help and try to explain if you can!

Chemistry
1 answer:
attashe74 [19]3 years ago
5 0

Answer: 4.76 * 10^2

476.

you bring the ending decimal to the first number and it takes you two hops to get the first number so that's what you put in the box after the 10

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A temperature of 300 Kelvin is how many degrees Celsius?<br> A. 273<br> B. 27<br> C. 573<br> D. 300
LekaFEV [45]

Answer:

The answer is B, to convert kelvin to temperature you :

Subtract 273 (k - 273)

6 0
2 years ago
how many grams of water can be produced when 65.5 grams of sodium hydroxide react with excess sulfuric acid.
34kurt

2NaOH+H2SO4--> Na2SO4+2H2O

80g NaOH(40g/mol)--> 36g H2O (18g/mol)

65.5 x (1/40g/mol)= 1.64 moles of NaOH

1.64 x 18g/mol= 29.5 g H2O

3 0
3 years ago
A sample of solid sodium hydroxide, weighing 13.20 grams is dissolved in deionized water to make a solution. What volume in mL o
andrew11 [14]

702 mL of 0.235 M H₂SO₄ solution are needed to neutralize the NaOH

Explanation:

When sodium hydroxide (NaOH) is neutralized by the sulphuric acid (H₂SO₄) the following chemical reaction occur:

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

number of moles = mass / molecular weight

number of moles of NaOH = 13.20 / 40 = 0.33 moles

Taking in account the chemical reaction, we devise the following reasoning:

if        2 moles of NaOH are reacting with 1 mole of H₂SO₄

then   0.33 moles of NaOH are reacting with X moles of H₂SO₄

X = (0.33 × 1) / 2 = 0.165 moles of H₂SO₄

molar concentration = number of moles / volume (L)

volume = number of moles / molar concentration

volume of H₂SO₄ solution = 0.165 / 0.235 = 0.702 L = 702 mL

Learn more about:

molar concentration

brainly.com/question/5618544

brainly.com/question/9183916

#learnwithBrainly

8 0
3 years ago
What is the relationship between the number of precipitates and the location on the periodic table?
drek231 [11]

Answer:  5/9 of the radius of the Earth. This is assuming that points are chosen randomly according to the following algorithm: We take a cube which precisely encloses the Earth and choose points uniformly from within that cube.

Explanation: YW . I hoped that helped.

8 0
3 years ago
A zero-order reaction has a constant rate of 4.40×10−4 m/s. if after 45.0 seconds the concentration has dropped to 1.50×10−2 m,
Nitella [24]
The  zero  order  means  that  the  rate  does  not  depend  on  concentration.   Therefore  the  rate  is  constant  even if  the  concentration  changes.For   each  second  it  goes  by   4.40  x  10^-4  is  consumed

what  about  45  second
=45 s x  (4.4  x10^-4m/s)=0.0198m
The  total  initial  is  therefore=  0.0198+(1.50  x10^-2)= 0.0348m
6 0
4 years ago
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