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-BARSIC- [3]
3 years ago
5

I will go to the app and give you brainly Est if u answer correctly ASAPPPPP

Chemistry
1 answer:
zhuklara [117]3 years ago
4 0

Answer:

C

Explanation:

I think it is C

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If Iron (Fe) gained a proton what would it be?
Mkey [24]
If iron (Fe) gained a proton it would become cobalt (CO).
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3 years ago
¿ ppr que no podemos automedicarnos ,cuando pensamos q tenemos el virus del CIVD-19?
GREYUIT [131]

Answer:

Porque como tu no eres profesional en medicina, no sabes nada sobre las dosis de medicamentos ni de los efectos que pueden tener en tu cuerpo si se administran incorrectamente.

Explanation:

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3 0
3 years ago
The source of bitterness in dark chocolate is the compound theobromine, an alkaloid present in cocoa beans. In a sample of dark
spin [16.1K]

Answer: 193 mg of theobromine are present in the sample.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadros number}}=\frac{6.45\times 10^{20}}{6.023\times 10^{23}}=1.07\times 10^{-3}moles

1 mole of theobromine (C_7H_8N_4O_2) weigh = 180 g

1.07\times 10^{-3}moles  of theobromine (C_7H_8N_4O_2) weigh = \frac{180}{1}\times 1.07\times 10^{-3}=0.193g=193mg   (1g=1000mg)

193 mg of theobromine are present in the sample.

5 0
3 years ago
Which piece of lab equipment listed below would be the best for measuring the volume of a liquid.
notka56 [123]
The answer is a graduated cylinder
4 0
2 years ago
Calculate the rms speed of co molecules at 320 k .
mezya [45]
<span>rms = (3RT/M)^1/2 Therefore, the rms of CO is: rms(CO) = [(3)(8.3145 J/mol*K)(320 K)/(0.028 kg/mol)]^1/2 rms = [2.65x10^5 m^2/s^2]^1/2 rms = 533.9181 m/s</span>
8 0
3 years ago
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