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erma4kov [3.2K]

3 years ago

7

What are safety considerations for a zipline?

1 answer:

Lina20 [59]3 years ago

4 0

The wire could break when your on it. Another one this is kind of personal if you don't stop yourself on the zip line you could slam off the rope or post.

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What is the difference between viruses and bacteria? Write complete sentences?

andrew-mc [135]

Answer:

While both can cause disease, viruses are not living organisms, whereas bacteria are. Viruses are only "active" within host cells which they need to reproduce, while bacteria are single-celled organisms that produce their own energy and can reproduce on their own. Bacteria serve many vital roles in nature outside of being infectious.

Explanation:

Hope this helped! :)

7 0

2 years ago

Hydrogen (H), oxygen (O), and Nitrogen (N) are all examples of which of the following?

Llana [10]

Answer:

All are correct

Explanation:

This might be a little deceptive. The question shows H, O and N which would designate ELEMENTS.

However, all of these can also be considered compounds and molecules as well. BUT, they are H₂, O₂ and N₂ when they are molecules and compounds.

So it depends on the whether the question is being literal or not.

8 0

3 years ago

A mover packs books, CDs, and DVDs into a moving box. If the box contains 6.5 kg of books, 1.5 kg of CDs, and 2.0 kg of DVDs, wh

IrinaVladis [17]

Answer:

$\text{Mass percentage}=\frac{\text{Mass of the substance}}{\text{Total mass}}\times 100$

Given: Mass of books = 6.5 kg

Mass of CD's = 1.5 kg

Mass of DVD's = 2.0 kg

Total mass = 6.5 kg + 1.5 kg + 2.0 kg = 10 kg

$\text {Mass percentage of books}=\frac{6.5kg}{10kg}\times {100}=65\%$

$\text {Mass percentage of CD's}=\frac{1.5kg}{10kg}\times {100}=15\%$

$\text {Mass percentage of DVD's}=\frac{2.0kg}{10}\times {100}=20\%$

7 0

3 years ago

Read 2 more answers

Which of the following is a binary compound?<br> A. NH4+<br> B. H2SO4<br> C. 02<br> D. Cao

AfilCa [17]

Answer:

B)H2SO4

Explanation:

Pentru Că așa vrea soarta

8 0

3 years ago

Read 2 more answers

Consider the dissolution of AB(s): AB(s)⇌A+(aq)+B−(aq) Le Châtelier's principle tells us that an increase in either [A+] or [B−]

Arlecino [84]

Answer:

A. 0.000128 M is the solubility of M(OH)2 in pure water.

B. $3.23\times 10^{-6} M$ is the solubility of $M(OH)_2$ in a 0.202 M solution of $M(NO_3)_2$ .

Explanation:

A

Solubility product of generic metal hydroxide = $K_{sp}=8.45\times 10^{-12}$

$M(OH)_2\rightleftharpoons M^{2+}+2OH^-$

S 2S

The expression of a solubility product is given by :

$K_{sp}=[M^{2+}][OH^-]^2$

$K_{sp}=S\times (2S)^2=4S^3$

$8.45\times 10^{-12}=4S^3$

Solving for S:

$S=0.000128 M$

0.000128 M is the solubility of M(OH)2 in pure water

B

Concentration of $M(NO_3)_2$ = 0.202 M

Solubility product of generic metal hydroxide = $K_{sp}=8.45\times 10^{-12}$

$M(OH)_2\rightleftharpoons M^{2+}+2OH^-$

S 2S

So, $[M^{2+}]=0.202 M+S$

The expression of a solubility product is given by :

$K_{sp}=[M^{2+}][OH^-]^2$

$8.45\times 10^{-12}=(0.202 M+S)(2S)^2$

Solving for S:

$S=3.23\times 10^{-6} M$

$3.23\times 10^{-6} M$ is the solubility of $M(OH)_2$ in a 0.202 M solution of $M(NO_3)_2$ .

8 0

3 years ago