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4 years ago

What is iriduim satellite?

1 answer:

7 0

<span>The Iridium satellite constellation is a satellite providing voice and data coverage to satellite phones, pagers and integrated transceivers over the Earth’s entire surface. It was discovered by Bary Bertiger, Rey Leopold and Ken Peterson in 1987 and then developed by Motorola from 1993 to 1998.</span>

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Do drugs affect the mind?

arlik [135]

The answer is Yes, drugs affect the mind.

Drugs affects various parts of mind differently , drugs can slow down or speed up the central nervous system. Drugs effects brain areas that are important for life sustaining activity and some drugs also become addictive.

The part of brain that is important for positive forms of motivation, Basal ganglia ,that got affected by overdose of drugs that beside that drug nothing can be pleasurable for the person who is taking the drug .

3 0

3 years ago

Upon combustion, a compound containing only carbon and hydrogen produces 2.67 g<img src="https://tex.z-dn.net/?f=CO_%7B2%7D" id=

Hoochie [10]

Answer:

$\boxed{\text{CH$_{2}$}}$

Explanation:

1. Calculate the mass of each element

$\text{Mass of C} = \text{2.67 g } \text{CO}_{2}\times \dfrac{\text{12.01 g C}}{\text{44.01 g }\text{CO}_{2}}= \text{0.7286 g C}\\\\\text{Mass of H} = \text{1.10 g }\text{H$_{2}$O}\times \dfrac{\text{2.016 g H}}{\text{18.02 g } \text{{H$_{2}$O}}} = \text{0.1231 g H}$

2. Calculate the moles of each element

$\text{Moles of C = 0.7286 g C}\times\dfrac{\text{1 mol C}}{\text{12.01 g C }} = \text{0.060 67 mol C}\\\\\text{Moles of H = 0.1231 g H} \times \dfrac{\text{1 mol H}}{\text{1.008 g H}} = \text{0.1221 mol H}$

3. Calculate the molar ratios

Divide all moles by the smallest number of moles.

$\text{C: } \dfrac{0.06067}{0.06067}= 1\\\\\text{H: } \dfrac{0.1221}{0.06067} = 2.015$

4. Round the ratios to the nearest integer

C:H = 1:2

5. Write the empirical formula

The empirical formula is $\boxed{\text{CH$_{2}$}}$

8 0

3 years ago

What is the mass in grams of KBr in 0.400 L of a 0.350 M solution???

melamori03 [73]

Answer:

The answer to your question is: 16.7 g of KBr

Explanation:

Data

mass KBr = ? g

Volume = 0.400 L

Concentration = 0.350 M

Formula

Molarity = moles / volume

moles = molarity x volume

Process

moles = (0.350)(0.400)

= 0.14

MW KBr = 39 + 80 = 119 g

119 g of KBr -------------------- 1 mol

x -------------------- 0.14 mol

x = (0.14 x 119) / 1

x = 16.7 g of KBr

8 0

3 years ago

Read 2 more answers

What is S for the reaction N2(g) +O2(g) 2NO? Use G = 173.3 kJ at 303.0 K and H = 180.7 kJ. Use G = H – TS.

Rashid [163]

Given information :

G = 173.3 KJ

H = 180.7 KJ

T = 303.0 K

S = unknown (?)

By using the given formula : G = H - TS , we can calculate the value of 'S'

On rearranging the formula we get : S = $\frac{H-G}{T}$

Plug in the value of G , H and T in the above formula :

S = $\frac{(180.7 KJ - 173.3KJ)}{303.0K}$

S = 0.02442 $\frac{KJ}{K}$

4 0

4 years ago

Read 2 more answers

Phosphine, an extremely poisonous and highly reactive gas, will react with oxygen to form tetraphosphorus decaoxide and water. P

pantera1 [17]

Answer:

The mass of P₄O₁₀ (s) formed is 471.03 g

Explanation:

4PH₃(g) + 8O₂(g) → P₄O₁₀ (s) + 6H₂O (g)

This is the ballanced equation.

Every 4 moles of phosphine, 1 mol of tetraphosphorus decaoxide is generated.

Moles of PH₃ = Mass PH₃ / Molar mass PH₃

Moles PH₃ = 225 g / 33.9 g/m

Moles PH₃ = 6.63 moles

So the rule of three, will be:

If 4 moles of PH₃ generate 1 mol P₄O₁₀

Then, 6.63 moles of PH₃ generate (6.63 .1)/4 = 1.66 moles

If we want to know the mass:

Moles . Molar mass = mass

Molar mass P₄O₁₀ = 283.88 g/m

1.66m . 283.88 g/m = 471.03 g

3 0

3 years ago