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vovikov84 [41]
3 years ago
15

What are isotopes please help

Chemistry
2 answers:
NikAS [45]3 years ago
6 0

Answer:

Isotopes are atoms of the same element with the same number of protons but different number of neutrons.

Hope this helps.

Hatshy [7]3 years ago
5 0
Variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. all isotopes of a given element have the same number of protons but different number of neutrons in each atom.
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For each molecule of glucose processed during glycolysis, the net yield is ____. 1. two molecules of NADH, two of ATP, and two o
Lana71 [14]

Answer: 1. two molecules of NADH, two of ATP, and two of pyruvate

Explanation:

During glycolysis 4 molecules of ATP are synthesized by two substrate level phosphorylation (first in step 6 conversion of 1,3-Bisphospho glycerate to 3-Bisphospho glycerate by 1,3-Bisphospho glycerate kinase produces 2 molecules of ATP . Secondly 2 molecules of ATP is produced in step 9 by pyruvate kinase). But 2 molecules of ATP are used in step 1 and 3 by hexokinase and phospho fructo kinase respectively, hence a net yield of only two ATP.

2 molecules of NADH is produced in step 5 by Glyceraldehyde-3-phosphate dehydrogenase.

The end product of glycolysis is 2 molecules of pyruvate.

5 0
3 years ago
Read 2 more answers
The density of oxygen gas is 1.429 × 10–3 g/cm3 at standard conditions. What would be the percent error of the average of two se
Igoryamba

Answer:

0.034%

Explanation:

First, let's calculated the average density (da) of the two experimental, which the sum of them divided by 2:

da = \frac{1.112x10^{-3} + 1.069x10^{-3}}{2}

da = 1.090x10⁻³ g/cm³

The relative error is given by the difference of the correct value and the avarege, divided by the correct value:

e = \frac{1.429x10^{-3} - 1.090x10^{-3}}{1.429x10^{-3}}

e = 3.39x10⁻⁴ x 100%

e = 0.034%

6 0
3 years ago
1.00 mL of a 250.0 µM solution of KCl is diluted to 50.0 mL. What is concentration of this solution?
Sever21 [200]

Answer:

5.00 µM

Explanation:

Given data

  • Initial concentration (C₁): 250.0 µM
  • Initial volume (V₁): 1.00 mL
  • Final concentration (C₂): ?
  • Final volume (V₂): 50.0 mL

We can find the final concentration using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁ / V₂

C₂ = 250.0 µM × 1.00 mL / 50.0 mL

C₂ = 5.00 µM

The concentration of the diluted solution is 5.00 µM.

3 0
3 years ago
If the cooling power remains constant, what will be the temperature of the system TB after it has been in the freezer for exactl
serg [7]

Answer:

The answer is "-50.424° C".

Explanation:

Given:

Time = 1 hour

TB=?

Formula:

TB= \frac{-T\times P}{m \times c_i}

time (T) = 1 hour

             = 3600 second

t=(3600 -t_2)

Calculating T_B:

\to T_B= \frac{-(3600 - t_2) 36.6}{0.250 \times 2090}\\

          = \frac{-(3600 - 2880) 36.6}{522.6}\\\\= \frac{-(720) 36.6}{522.6}\\\\= \frac{-720 \times 36.6}{522.6}\\\\= \frac{-26352}{522.6}\\\\= -50.424 ^{\circ} C

8 0
3 years ago
What is the correct name for Mg3S2
Anna71 [15]

Answer:

Magnesium sulfide

Explanation:

Chemical formula- MgS

3 0
3 years ago
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