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poizon [28]
2 years ago
7

Help! The products of a chemical equation are CO2 and 2H20. Which set of atoms

Chemistry
2 answers:
elixir [45]2 years ago
5 0

D. Ap3x just did it

---------

Zarrin [17]2 years ago
4 0

Answer:

D. 1 C, 4 O and 4 H

Explanation:

a p e x, just took the quiz

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Before the use of technetium-99m, patients with high risk coronary artery disease were evaluated using thallium-201 which has a
agasfer [191]

Answer: 243 hours

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = initial amount of the reactant = 5.000\mu g

a - x = amount left after decay process =  \frac{10}{100}\times 5.000\mu g=0.5\mu g

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{73.00hours}=9.49\times 10^{-3}hours^{-1}

b) for reducing the mass to 10.00 % of its original mass

t=\frac{2.303}{k}\log\frac{a}{a-x}

t=\frac{2.303}{9.49\times 10^{-3}}\log\frac{5.000}{0.5}

t=243hours

The time taken to reach 10.00 % of its original mass is 243 hours

3 0
3 years ago
I'm having trouble with my wireless headphones that won't turn on at all it's not blinking why? need help asap.....​
svetoff [14.1K]

Answer:

Try a hard reset: Press and hold both the power button and the volume button (plus the other 2 as well perhaps) for about 10 seconds and then release. Check if the earphones will then either show that they are charging (with the cable inserted of course) or that they will turn on if the Power button is pressed.                                                                                                                          Explanation:Hope this helped you

8 0
3 years ago
A saturated solution of lead(ii) fluoride, pbf2, was prepared by dissolving solid pbf2 in water. the concentration of pb2+ ion i
katrin [286]

Equation :

PbF2 ------> Pb2+ + 2F-

Solubility product is given as:

Ksp = [Pb2+][F-]^2

let x = [Pb2+]

Ksp = x(2x)^2 = 4(x)^3 = 4(2.08*10^-3)^3

Ksp = 3.60*10^-8

8 0
3 years ago
In which state of matter are the particles least able to move?
amid [387]
The solid state where particles are more compact
3 0
3 years ago
Photosynthesis uses 660-nm light to convert co2 and h2o into glucose and o2. calculate the frequency of this light.
Allushta [10]
The unit expressed in 660 nm of light represents the wavelength of light. If you want to determine the frequency, you use the speed of light to relate the two. The formula is:

c = λν
where
λ is the wavelength
ν is the frequency
c is the speed of light = 3×10⁸ m


Apply SI units:
(3×10⁸ m) = (660×10⁻⁹ m)(ν)
Solving for ν,
<em>ν = 4.55×10¹⁴ s⁻¹</em>
4 0
3 years ago
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