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Sergeeva-Olga [200]
3 years ago
12

Hi GUYS PLEASE HELP ME YOU KNOW I HELP YOU WHEN YOU NEED IT MOST SO HERE IT GOES WHICH SEQUENCE REPRESENTS THE ORDER OF DEVELOPM

ENT FOR MANY PLANTS?
1)SEED develops inside fruit, seed is dispersed, seed germinates,plant grows
2)seed is dispersed , seed develops inside fruit, seed germinates, plant grows
3)seed germinates , plant grows, seed is dispersed, seed develops inside fruit
4)seed is dispersed, plant grows, seed germinates, seed develops inside fruit
Chemistry
1 answer:
exis [7]3 years ago
6 0
To answer your question, the answer is number 1. hope this help
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L (litter)
K (kelvin)
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What is the symbol for hydrogen
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The symbol for hydrogen is H
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A 0.533 g sample of a carbonate salt is added to a flask. The only thing you know is that per formula unit, there is only one ca
dimulka [17.4K]

Answer:

\mathbf{CrCO_3}

Explanation:

The total mole of H_2SO_4 added = 15 × 1 × 10⁻³

= 15 × 10⁻³ mole

= 15 mmoles

the number of moles of NaOH added in order to neutralize the excess acid = 0.5905 ×  29.393 = 17.36 mmoles

the equation for the reaction is:

2NaOH + H_2SO_4 --------> Na_2SO_4 +2H_2O

i.e

2 moles of NaOH react with H_2SO_4

1 moles of  NaOH will react with 1/2  H_2SO_4

17.36 mmoles of NaOH = 1/2 × 17.36 mmoles of H_2SO_4

                                       = 8.68 mmoles

Number of moles of H_2SO_4 that react with MCO₃ = Total moles of H_2SO_4 added - moles of H_2SO_4 reacted with NaOH

= (15 - 8.68) mmoles

= 6.32 mmoles

H_2SO_4 + MCO_3  ------>   M_2SO_4   +    H_2O   +   CO_2

1 mole of H_2SO_4 react with 1 mole of MCO_3

6.32 mmoles of H_2SO_4 = 6.32 mmoles of MCO_3

number of moles of MCO_3 = 6.32 10⁻³ moles

mass of  MCO_3 (carbonate salt) = 0.533 g

molar mass of MCO_3  = (M+60)g/mol

We all know that ;

number of moles = mass/molar mass

Then:

6.32 10⁻³ = 0.533 / (M+60)

(M+60) = 0.533/ 6.32 10⁻³

M + 60 = 84.34

M = 84.34 - 60

M = 24.34

Thus the element with the atomic mass of 24.34 is Chromium

The chemical formula for the compound is :  \mathbf{CrCO_3}

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3 years ago
Consider just the first sentence of this multistep word problem. Sentence 1: The sum of the ages of a brother and sister is 26.
kiruha [24]

Answer:

a. b + s = 26

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Explanation:

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How does the number of molecules in one mole of carbon dioxide compare with the number of molecules in one mole of water?
tresset_1 [31]

Answer:

d

Explanation:

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