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3 years ago

7

Describe the best method for separating a mixture of sand, salt, and steel shavings by placing the steps below in the correct or

der.

2 answers:

kondor19780726 [428]3 years ago

6 0

Answer: a sifter

Explanation:

alisha [4.7K]3 years ago

6 0

Answer:

4,3,1,2

Explanation:

Just did it on edge :)

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At its critical point, ammonia has a density of 0.235 g cm23. You have a special thickwalled glass tube that has a 10.0mm outs

salantis [7]

Answer:

$\large \boxed{\text{69.3 mg}}$

Explanation:

1. Volume of sealed tube

Assume the sealed tube is a right circular cylinder in which the cap and the base are also 4.20 mm thick.

Its outside dimensions are 155 mm long × 10.0 mm diameter.

Its inside dimensions are

h = 155 mm - 2 × 4.20 mm = 146.6 mm

r = 5.0 mm - 4.20 mm = 0.8 mm

V = πr²h = π(0.8)²× 146.6 mm³ = 294.8 mm³ = 0.2948 cm³

2. Calculate the mass of NH₃

$\begin{array}{rcl}\text{Density} & = & \dfrac{\text{Mass}}{\text{Volume}}\\\\\rho & = &\dfrac{m}{V}\\\\0.235 \text{ g$\cdot$ cm}^{-3} & = & \dfrac{m}{\text{0.2948 cm}^{3}}\\\\m & = & \text{0.0693 g}\\& = & \textbf{69.3 mg}\\\end{array}\\\text{You must seal $\large \boxed{\textbf{69.3 mg}}$ of ammonia in the tube.}$

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3 years ago

Which dilute acid is used to make sodium carbonate salt

andreev551 [17]

Hydrochloric acid :))

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3 years ago

Read 2 more answers

nordsb [41]

#1 B

#2 C

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I Just did this

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1 What is the approximate altitude of Polaris when viewed from New York City?

77julia77 [94]

Answer:

44° to 45°

Explanation:

The altitude of Polaris star when viewed from New York City is somewhat between 44° to 45°. However, Polaris is directly overhead at the North Pole (90° of latitude); in other words, the angle between Polaris and the horizon at the North Pole is 90°. This angle is called "the altitude" of Polaris.

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Pls help with chemistry

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