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3 years ago

Name two objects which are hard to touch

Chemistry

2 answers:

ziro4ka [17]3 years ago

7 0

fire and mercury

i think i am not sure

but pls brainlist

Anni [7]3 years ago

3 0

Answer:

Name of two hard objects is Brick and Wood.

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What components do not separate when left standing?

djyliett [7]

Oil and water it’s components do not seperate when left standing

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3 years ago

Help this is due today!!!

Nookie1986 [14]

Answer:

a) Fe

b) Fe

c) Fe

Explanation:

When using their stoichiometric ratios, in all of the the iron will run out before the oxygen, making the iron the limiting reactant.

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2 years ago

How many moles are there in 8.50 X 1024 molecules of sodium sulfate, Na2SO3?

il63 [147K]

Answer:

<h2>14.12 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{8.50 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.119601...$

We have the final answer as

<h3>14.12 moles</h3>

Hope this helps you

3 0

2 years ago

100.0 mL of Ca(OH)2 solution is titrated with 5.00 x 10–2 M HBr. It requires 36.5 mL of the acid solution for neutralization. Wh

miskamm [114]

Answer:

The number of moles HBr = 0.001825

The concentration of Ca(OH)2 = 0.009125 M

Explanation:

Step 1: Data given

Volume of the Ca(OH)2 = 100.0 mL = 0.100 L

Molarity of HBr = 5.00 * 10^-2 M

Volume of HBR = 36.5 mL = 0.0365 L

Step 2: The balanced equation

Ca(OH)2 + 2HBr → CaBr2 + 2H2O

Step 3: Calculate molarity of Ca(OH) 2

b*Va* Ca = a * Vb*Cb

⇒with b = the coefficient of HBr = 2

⇒with Va = the volume of Ca(OH)2 = 0.100 L

⇒with ca = the concentration of Ca(OH)2 = TO BE DETERMINED

⇒with a = the coefficient of Ca(OH)2 = 1

⇒with Vb = the volume of HBr = 0.0365 L

⇒with Cb = the concentration of HBr = 5.00 * 10^-2 = 0.05 M

2 * 0.100 * Ca = 1 * 0.0365 * 0.05

Ca = (0.0365*0.05) / 0.200

Ca = 0.009125 M

Step 4: Calculate moles HBr

Moles HBr = concentration HBr * volume HBr

Moles HBr = 0.05 M * 0.0365 L

Moles HBr = 0.001825 moles

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3 years ago

Places with _______ altitude will have ______ climates. low; cold high; cold low; freezing high; warm

vlada-n [284]

Places with high altitudes will have cold climates.

6 0

3 years ago

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Name two objects which are hard to touch​

Name two objects which are hard to touch