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2 years ago

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What are units used for specific gravity? its 20 points ;)

1 answer:

Amanda [17]2 years ago

6 0

Answer:

Explanation: Specific gravity is a dimensionless quantity; that is, it is not expressed in units. To find the sp gr of a solid or liquid, you must know its density in kilograms per meter cubed (kg/m3) or in grams per centimeter cubed (g/cm3). Then, divide this density by the density of pure water in the same units.

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What is the temperature difference if 300 cal are used to warm water

PIT_PIT [208]

Answer:

<u>The temperature difference is</u> $\frac{300}{m} Kkg^{-1}$

Explanation:

The formula that is to used is :

Δ $Q=ms$ Δ $T$

<em>where ,</em>

<em>Δ $Q$ is the heat supplied in calories = 300cal</em>
<em> $m$ is the mass of water taken = m (assumed)</em>
<em>Δ $T$ is the change in temperature</em>
<em> $s$ is the specific heat of water = $1calK^{-1}Kg^{-1}$ </em>

ΔT :

$\frac{300}{m*1} \\=\frac{300}{m} Kkg^{-1}$

6 0

3 years ago

he mineral rhodochrosite [manganese(II) carbonate, MnCO3] is a commercially important source of manganese. Write a half-reaction

valina [46]

Answer:

$MnCO_{3}+2H_{2}O-2e^{-}\rightarrow MnO_{2}+HCO_{3}^{-}+3H^{+}$

Explanation:

Half reaction: $MnCO_{3}\rightarrow MnO_{2}$

(1) $CO_{3}$ balance: $MnCO_{3}\rightarrow MnO_{2}+HCO_{3}^{-}$

(2)H and O balance in acidic medium: $MnCO_{3}+2H_{2}O\rightarrow MnO_{2}+HCO_{3}^{-}+3H^{+}$

(3) charge balance: $MnCO_{3}+2H_{2}O-2e^{-}\rightarrow MnO_{2}+HCO_{3}^{-}+3H^{+}$

Hence balanced half-reaction: $MnCO_{3}+2H_{2}O-2e^{-}\rightarrow MnO_{2}+HCO_{3}^{-}+3H^{+}$

7 0

2 years ago

Read 2 more answers

In Part A, you found the amount of product (1.80 mol P2O5 ) formed from the given amount of phosphorus and excess oxygen. In Par

Finger [1]

First step is to balance the reaction equation. Hence we get P4 + 5 O2 => 2 P2O5

Second, we calculate the amounts we start with

P4: 112 g = 112 g/ 124 g/mol – 0.903 mol

O2: 112 g = 112 g / 32 g/mol = 3.5 mol

Lastly, we calculate the amount of P2O5 produced.

2.5 mol of O2 will react with 0.7 mol of P2O5 to produce 1.4 mol of P2O5.

This is 1.4 * (31*2 + 16*5) = 198.8 g

3 0

3 years ago

What is the largest river basin in North Carolina?

Liula [17]

The french broad? idk sorry

6 0

2 years ago

Read 2 more answers

For each of the following formulas, write the

ankoles [38]

Answer:

(a) Potassium 3; phosphorus 1; oxygen 4

(b) Aluminium 3; oxygen 9; hydrogen 9

(c) Iron 10; sulfur 15; oxygen 60

Explanation:

(a) K₃PO₄

In one formula unit of K₃PO₄ , there are three atoms of potassium (K), one atom of phosphorus (P), and four atoms of oxygen (O).

In two formula units there are

Potassium — six atoms

Phosphorus — two atoms

Oxygen — eight atoms

(b) Al(OH)₃

In one formula unit of Al(OH)₃, there is one atom of aluminium (Al), three atoms of O, and three atoms of Hydrogen (H).

In three formula units there are

Aluminium — three atoms

Oxygen — nine atoms

Hydrogen — nine atoms

(c) Fe₂(SO₄)₃

In one formula unit of Fe₂(SO₄)₃, there are two atoms of iron (Fe), three atoms of sulfur (S), and 12 atoms of O.

In five formula units there are

Iron — 10 atoms

Sulfur — 15 atoms

Oxygen — 60 atoms

5 0

3 years ago