3 years ago

Answers for both boxes please

Chemistry

1 answer:

Elan Coil [88]3 years ago

3 0

Explanation:

$\frac{6.900 \times {10}^{10} }{4.000 \times {10}^{8} } \\ 1.725 \times {10}^{10 - 8} \\ 1.725 \times {10}^{2}$

Hope it will help you :)

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Convert the speed of light, 3.0 x 10^8 m/s, into mi/hr. (1610 m = 1 mi). Could you please explain step by step thank you!

jenyasd209 [6]

Answer:

$v=6.7\times 10^9\ mi/hr$

Explanation:

Given that,

The speed of light is 3×10⁸ m/s

We need to convert it into mi/hr.

Since, 1 mile = 1610 m

1 hour = 3600 s

So,

$v=3\times 10^8\ \dfrac{m}{s}\\\\=3\times 10^8\ \dfrac{\dfrac{1}{1610}\ \text{miles}}{\dfrac{1}{3600}\ s}\\\\=6.7\times 10^9\ mi/hr$

So, the required speed of light is $6.7\times 10^9\ mi/hr$ .

8 0

3 years ago

Match the element with its description. Match Term Definition Lithium A) Highly reactive gas Lead B) Nonreactive gas Fluorine C)

eduard

Lithium - Malleable, soft, and shiny

Lead - Opaque solid with higher density

Fluorine - Highly reactive gas

Krypton - Nonreactive gas

*hope I helped :)*

6 0

3 years ago

The observed rotation of 2.0 gg of a compound in 50 mLmL of solution in a polarimeter tube 25-cmcm long is +47.2 ∘∘ . What is th

Anastaziya [24]

Answer:

[∝] = +472

Explanation:

Specific rotation in a solution is defined as:

[∝] = ∝ / c×l

Where:

[∝] is specific rotation, ∝ is observed rotation (In degrees), c is concentration in g/mL and l is path length (In dm).

∝: +47.2°

c: 2.0g / 50mL = 0.04g/mL

l: 25cm × (1dm /10cm) = 2.5dm

Replacing:

[∝] = +47.2° / 0.04g/mL×2.5dm = +472

I hope it helps!

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3 years ago

NiSe2 + Ca3(PO4)2 = Ni3(PO4)2 + CaSe balance please

Aliun [14]

3Ni + Sn3(PO4)2 → Ni3(PO4)2 + 3Sn I think. Not for sure though

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2 years ago

The balanced reaction between aqueous nitric acid and aqueous strontium hydroxide is ________.

Kaylis [27]

d.2HNO3 (aq) + Sr(OH)2 (aq) → 2H2O (l) + Sr(NO3)2(aq)
4H 4H
8O 8O
2N 2N
1Sr 1Sr

3 0

3 years ago

Answers for both boxes please ​

Answers for both boxes please