3 years ago

How many different design ideas of the puff car do you need to draw? Question options:

Chemistry

2 answers:

Makovka662 [10]3 years ago

5 0

Answer:

Im not really sure

Explanation:

I think 6 or 3

Amiraneli [1.4K]3 years ago

4 0

6 is ok I think but if it is not complain to me

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Convert to moles:<br> 100.0g Ca3(PO4)2

salantis [7]

Answer:

0.322 moles

Explanation:

Given Mass, m = 100 g

The molar mass of Ca₃(PO₄)₂

Ca₃(PO₄)₂ = (3 x 40.08) + (2 x 30.97) + (8 x 16.00)

M = 310.18 g/mol

Let there are n number of moles,

n = given mass/ molar mass

$n=\dfrac{100 }{310.18 }\\\\n=0.322\ mol$

So, there are 0.322 moles.

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3 years ago

Which statement is true? Postively charged objects attract other positively charged objects negatively charged objects attract o

ANEK [815]

Answer:

Explanation:one is true because if it is positiveit would not be attracting it would be sepperating

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3 years ago

What type of element did fermi expect to find when uranium absorbed a neutron and then ejected a beta particle? what did they fi

ololo11 [35]

Answer: a)neptunium b) the element is unstable

Explanation:

a) 238 0 239 -1

U + n = Np e

92 1 93 0

b) it is an isotope of neptunium with half-lives less than 4.5 days, with most less than 50 minutes. It is therefore not stable that's why they where unable to identify it

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3 years ago

Using what you know about the periodic table, list some patterns that organize the elements in terms of atomic number, atomic ma

Sindrei [870]

Answer:

yes

Explanation:

yes they're very common.

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3 years ago

How many molecules are in 9.8 grams of calcium

yan [13]

Hmm
One mole of calcium is usually equal to 40 grams so divide 9.8 by 40 which would be 4.0 molecules

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4 years ago