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ASHA 777 [7]
3 years ago
11

A person's blood type is determined by the presence and absence of specific antigens on the cell membrane. Which of these would

Chemistry
1 answer:
sukhopar [10]3 years ago
5 0

Answer:

C - no antibodies

Explanation:

I dont think there is any blood type without antibodies

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Is ink a compound or mixture?
Vladimir79 [104]
A mixture, because it contains multiple dyes and compounds

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8 0
3 years ago
If nitrogen-13 has a half life of 2.5 years, how much remains from a 100g sample after 7.5 years
Sonbull [250]

Answer:

12.50g

Explanation:

T½ = 2.5years

No = 100g

N = ?

Time (T) = 7.5 years

To solve this question, we'll have to find the disintegration constant λ first

T½ = In2 / λ

T½ = 0.693 / λ

λ = 0.693 / 2.5

λ = 0.2772

In(N/No) = -λt

N = No* e^-λt

N = 100 * e^-(0.2772*7.5)

N = 100*e^-2.079

N = 100 * 0.125

N = 12.50g

The sample remaining after 7.5 years is 12.50g

5 0
3 years ago
A molecule involves two atoms in a chemical bond that do what share?
Viefleur [7K]
B. Share Electrons.
Hope this helps. 
4 0
3 years ago
Read 2 more answers
5
Archy [21]

Answer:

<h3>The answer is option C</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of liquid = 15 mL

density = 2.5 g/mL

We have

mass = 15 × 2.5

We have the final answer as

<h3>37.5 g</h3>

Hope this helps you

6 0
3 years ago
How many neutron and protons are in lithium-7?
ikadub [295]
So it contains three protons and four neutrons 
6 0
3 years ago
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