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3 years ago

To one decimal place 1.3511

Chemistry

2 answers:

Jet001 [13]3 years ago

5 0

1.4

you need help

really

dedylja [7]3 years ago

3 0

1.4 because you round the 3 to a 4 because of the 5 in the hundredths place.

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Smooth muscle myosin is a motor protein that plays a crucial role in the contraction of smooth muscle. If this protein has a mol

zysi [14]

Answer: Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass, occupies 22.4 L at STP contains avogadro's number $(6.023\times 10^{23})$ of particles.

Molecular mass of protein = 480,000 g/mol

Thus 1 mole of protein weighs = 480,000 g

So 27 moles of protein weighs = $\frac{480,000}{1}\times 27=12960000g$

Thus the mass, in grams, of 27 moles of smooth muscle myosin is 12960000 grams

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4 years ago

Hydrogen gas and oxygen gas combine according to this reaction: 2H2(g]+O2(g]→2H2O(l]At STP, a chemist mixes 3.74 L of hydrogen g

zavuch27 [327]

Answer:

1.47 Liters of O₂ were reacted

Explanation:

The reaction is:

2H₂ (g) + O₂(g) → 2H₂O(l)

As we have the volume of hydrogen we need to work with denstiy to determine the moles that have reacted.

Density = mass / volume

Density . volume = mass → 0.071 g/L . 3.74L = 0.265 g

We determine the moles of H₂ → 0.265 g. 1mol/2g = 0.132 moles

In the reaction, ratio is 2:1. We make a rule of three:

2 moles of H₂ need 1 mol of O₂ to react

Then, 0.132 moles would need (0.132 .1)/2 = 0.066 moles of O₂

In order to determine the volume we need the oxygen's density but, we have to convert the mass to moles, firstly.

0.066 moles . 32 g/ 1mol = 2.12 g

Then oxygen's density = oxygen's mass / oxygen's volume

Oxygen's volume = oxygen's mass / oxygen's density

O₂ volume = 2.12 g / 1.43 g/L = 1.47 L

5 0

3 years ago

Read 2 more answers

an object with a larger mass requires greater force to accelerate than an object with a smaller mass true or false?

mr Goodwill [35]

Answer:

true

Explanation:

because of its weight

5 0

3 years ago

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How many atoms are there in each of the following

oee [108]

<h3>Answer:</h3><h3>a) 9.033 × 10²³ particles</h3><h3>b) 4.068 × 10²⁴ particles</h3><h3>c) 1.51 × 10²³ particles</h3>

Explanation:

For us to answer these questions, we have to know two formulas:

Number of particles = moles × Avogadro's Number
Moles = Mass ÷ Molar Mass

Therefore:

a) particles of Na = 1.50 mol × (6.022 × 10²³) particles/mol

= 9.033 × 10²³ particles

b) particles of Pb = 6.755 mol × (6.022 × 10²³) particles/mol

= 4.068 × 10²⁴ particles

c) particles of Si

= (7.02 g ÷ 28.085 g/mol) × (6.022 × 10²³) particles/mol

= 1.51 × 10²³ particles

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2 years ago

What is going on in the hexane layer at the end of the group i anion experiment?

mafiozo [28]

Answer:The Hexane layer test is used here for the confirmation of Bromide and Chloride ion. In the test, HNO3 is added to make the solution little acidic.

Explanation:

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3 years ago