All categories

4 years ago

The chart indicates the time, speed, and velocity of five runners.

Chemistry

1 answer:

Vitek1552 [10]4 years ago

3 0

Answer:

garreth is the fasstis runner

luigi is the 2 fasts runner

elisa is the 3 fastes runner

Explanation:

You might be interested in

Will give branliest

fomenos

60 Grams are produced due to the fact that it may not produce more due to the certain capacity that varies on the size of the cube.

5 0

3 years ago

2Na + 2H2O → 2NaOH + H2 During a laboratory experiment, a certain quantity of sodium metal reacted with water to produce sodium

anyanavicka [17]

Answer : The initial quantity of sodium metal used is 17.25 grams.

Solution : Given,

Volume of $H_2$ gas = 8.40 L

Molar mass of Na metal = 23 g/mole

The Net balanced chemical reaction is,

$2Na+2H_2O\rightarrow 2NaOH+H_2$

At STP, 22.4 L of volume is occupied by 1 mole of $H_2$ gas

so, 8.40 L of volume is occupied by = $\frac{8.40L\times 1mole}{22.4L}$ = 0.375 moles of $H_2$ gas

Now from the above reaction, we conclude that

1 mole of $H_2$ gas produced by the 2 moles of Na metal

0.375 moles of $H_2$ gas produced = $\frac{2moles\times 0.375mole}{1mole}=0.75moles$ of Na metal

The quantity of Na metal used = Moles of Na metal × Molar mass of Na metal = 0.75 moles × 23 g/mole = 17.25 grams

Therefore, the initial quantity of sodium metal used is 17.25 grams.

4 0

3 years ago

How many grams of sodium are in 0.820 moles of na2so4?

s344n2d4d5 [400]

<span>the molar mass of a compound is the sum of the products of the atomic masses by the number of atoms of the element.
molar mass of Na</span>₂SO₄<span> is - 142 g/mol.
1 mol of </span>Na₂SO₄<span> has a mass of 142 g.
In 1 mol of </span>Na₂SO₄<span> the mass of Na is 23 g/mol x 2 = 46 g.

Mass of Na in 1 mol of </span>Na₂SO₄ is - 46 g

mass of Na in 0.820 mol of Na₂SO₄ - 46 g /1 mol x 0.820 mol = 37.72 g.
mass of Na is 37.72 g

5 0

4 years ago

Read 2 more answers

What is the mass of 5.26 mol Fe2(SO4)3?<br> Answer in units of g.

dsp73

<h3>Answer:</h3>

2100 g Fe₂(SO₄)₃

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Stoichiometry</u>

Using Dimensional Analysis

<u>Atomic Structure</u>

Reading a Periodic Table

<h3>Explanation:</h3>

<u>Step 1: Define</u>

5.26 mol Fe₂(SO₄)₃

<u>Step 2: Identify Conversions</u>

Molar Mass of Fe - 55.85 g/mol

Molar Mass of S - 32.07 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Fe₂(SO₄)₃ - 2(55.85) + 3(32.07) + 12(16.00) = 399.91 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 5.26 \ mol \ Fe_2(SO_4)_3(\frac{399.91 \ g \ Fe_2(SO_4)_3}{1 \ mol \ Fe_2(SO_4)_3})$
Multiply/Divide: $\displaystyle 2103.53 \ g \ Fe_2(SO_4)_3$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

2103.53 g Fe₂(SO₄)₃ ≈ 2100 g Fe₂(SO₄)₃

3 0

3 years ago

Vegetarians do not eat animal products but rather derive their protein from plant sources. Which type of protein do vegetarian f

Whitepunk [10]

Answer: lysine and methionine

Explanation:

6 0

3 years ago