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Flauer [41]
3 years ago
10

What is spina bifida?

Chemistry
1 answer:
sdas [7]3 years ago
8 0

Answer:

Spina bifida is a condition that affects the spine and is usually apparent at birth. It is a type of Neural Tube Defect (NTD).

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The continents may not have drifted slowly into their present positions. True False
12345 [234]
True, look up pangea
7 0
4 years ago
Read 2 more answers
1. What kinds of metals are REALLY reactive? why?
Olin [163]

Answer:

1. Alkali metals (group 1)

2. halogens (Group 17)

3. noble gasses (group 18)

Explanation:

1. alkali metals only have one valence electron meaning that they really want to lose that one valence electron to get a full octet.

2. halogens have 7 valence electrons meaning that they just need to gain 1 to get a full octet.

3. Nobel gasses already have a full octet meaning that they don't want to react. (atoms only react to get a full octet)

I hope this helps.  Let me know if anything is unclear.

8 0
3 years ago
An object was measured by a worker as 14.6cm long, however, the manufacturer specifications list the length of the object at 14.
mars1129 [50]

it's 0.2cm different from the expected value, wich was 14.6cm

how many percent that are is calculated in the screenshot.

rounded it's 1.37%

4 0
3 years ago
reaction is found to have a rate constant of 12.5 s-1 at 25.0 Celsius. When you heat the reaction up by ten degrees Celsius, the
lisabon 2012 [21]

Answer : The activation energy for the reaction is, 52.9 kJ/mol

Explanation :

According to the Arrhenius equation,

K=A\times e^{\frac{-Ea}{RT}}

or,

\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

T_1 = initial temperature = 25.0^oC=273+25.0=298.0K

T_2 = final temperature = 25.0^oC+10=35.0^oC=273+35.0=308.0K

K_1 = rate constant at 25.0^oC = 12.5s^{-1}

K_2 = rate constant at 35.0^oC = 2\times K_1=2\times 12.5s^{-1}=25.0s^{-1}

Ea = activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

Now put all the given values in this formula, we get:

\log (\frac{25.0s^{-1}}{12.5s^{-1}})=\frac{Ea}{2.303\times 8.314J/mole.K}[\frac{1}{298.0K}-\frac{1}{308.0K}]

Ea=52903.05J/mole=52.9kJ/mol

Therefore, the activation energy for the reaction is, 52.9 kJ/mol

4 0
3 years ago
How are the geographical equator, meteorological equator, and ITCZ related? What happens at the ITCZ?
scoray [572]
The ITCZ<span> or </span>Intertropical Convergence Zone<span> is a region on Earth that experiences ... The </span>ITCZ<span> lies near the </span>equator<span>, bringing precipitation caused by convection. ... </span>Related<span>. The Poetry of Sailors: What Are Doldrums and Trade Winds</span>
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4 years ago
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