3 years ago

Where is tenessine on the periodic table?

1 answer:

8 0

Tenessine used to be called Ununseptium, however since it was only recently regarded as an actual element and the existence of the element has now been proven, it ended up receiving the name Tenessine. The atomic number is 117 and is in a Halogen.

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What is the common name of the group whose members are characterized by endoskeleton and a unique water vascular system

iragen [17]

The correct answer for this question would be option B. The common name of the group whose members are characterized by endoskeleton and a unique water vascular system are called the <span> Echinoderms. Examples of echinoderms are starfish, sea urchin, feather stars and sea cucumbers. Hope this is the answer that you are looking for.</span>

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3 years ago

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The half life of potassium 40 is approximately 1.25 billion years. An igneous rock is found to contain about 1/4 of its original

vodomira [7]

Answer:

2.5 billion years

Explanation:

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3 years ago

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UNO [17]

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2 years ago

A 0.885 M solution of KBr whose initial volume is 82.5 mL has more water added until its concentration is 0.500 M. What is the n

4vir4ik [10]

Answer:

$V_2=146mL$

Explanation:

Hello there!

In this case, since the equation for the calculation of dilutions is:

$M_1V_1=M_2V_2$

Whereas M is the molarity and V the volume, because the final concentration is lower than the initial. Thus, since we are asked to calculate the final volume, we solve for V2 as follows:

$V_2=\frac{M_1V_1}{M_2}=\frac{0.885M*82.5mL}{0.500M}\\\\V_2=146mL$

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3 years ago

Psoriasis is a disease that causes a red rash on the skin. which body system does psoriasis affect?

damaskus [11]

Answer:

It is b

Explanation:

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3 years ago